/**
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* Cesium - https://github.com/CesiumGS/cesium
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*
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* Copyright 2011-2020 Cesium Contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Columbus View (Pat. Pend.)
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*
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* Portions licensed separately.
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* See https://github.com/CesiumGS/cesium/blob/master/LICENSE.md for full licensing details.
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*/
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define(['exports', './when-8d13db60', './Check-70bec281', './RuntimeError-ba10bc3e'], function (exports, when, Check, RuntimeError) { 'use strict';
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/**
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* @license
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*
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* Grauw URI utilities
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*
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* See: http://hg.grauw.nl/grauw-lib/file/tip/src/uri.js
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*
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* @author Laurens Holst (http://www.grauw.nl/)
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*
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* Copyright 2012 Laurens Holst
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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/**
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* Constructs a URI object.
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* @constructor
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* @class Implementation of URI parsing and base URI resolving algorithm in RFC 3986.
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* @param {string|URI} uri A string or URI object to create the object from.
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*/
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function URI(uri) {
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if (uri instanceof URI) { // copy constructor
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this.scheme = uri.scheme;
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this.authority = uri.authority;
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this.path = uri.path;
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this.query = uri.query;
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this.fragment = uri.fragment;
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} else if (uri) { // uri is URI string or cast to string
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var c = parseRegex.exec(uri);
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this.scheme = c[1];
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this.authority = c[2];
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this.path = c[3];
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this.query = c[4];
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this.fragment = c[5];
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}
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}
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// Initial values on the prototype
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URI.prototype.scheme = null;
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URI.prototype.authority = null;
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URI.prototype.path = '';
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URI.prototype.query = null;
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URI.prototype.fragment = null;
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// Regular expression from RFC 3986 appendix B
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var parseRegex = new RegExp('^(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\\?([^#]*))?(?:#(.*))?$');
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/**
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* Returns the scheme part of the URI.
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* In "http://example.com:80/a/b?x#y" this is "http".
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*/
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URI.prototype.getScheme = function() {
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return this.scheme;
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};
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/**
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* Returns the authority part of the URI.
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* In "http://example.com:80/a/b?x#y" this is "example.com:80".
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*/
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URI.prototype.getAuthority = function() {
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return this.authority;
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};
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/**
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* Returns the path part of the URI.
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* In "http://example.com:80/a/b?x#y" this is "/a/b".
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* In "mailto:mike@example.com" this is "mike@example.com".
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*/
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URI.prototype.getPath = function() {
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return this.path;
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};
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/**
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* Returns the query part of the URI.
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* In "http://example.com:80/a/b?x#y" this is "x".
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*/
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URI.prototype.getQuery = function() {
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return this.query;
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};
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/**
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* Returns the fragment part of the URI.
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* In "http://example.com:80/a/b?x#y" this is "y".
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*/
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URI.prototype.getFragment = function() {
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return this.fragment;
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};
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/**
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* Tests whether the URI is an absolute URI.
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* See RFC 3986 section 4.3.
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*/
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URI.prototype.isAbsolute = function() {
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return !!this.scheme && !this.fragment;
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};
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///**
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//* Extensive validation of the URI against the ABNF in RFC 3986
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//*/
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//URI.prototype.validate
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/**
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* Tests whether the URI is a same-document reference.
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* See RFC 3986 section 4.4.
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*
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* To perform more thorough comparison, you can normalise the URI objects.
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*/
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URI.prototype.isSameDocumentAs = function(uri) {
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return uri.scheme == this.scheme &&
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uri.authority == this.authority &&
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uri.path == this.path &&
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uri.query == this.query;
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};
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/**
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* Simple String Comparison of two URIs.
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* See RFC 3986 section 6.2.1.
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*
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* To perform more thorough comparison, you can normalise the URI objects.
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*/
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URI.prototype.equals = function(uri) {
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return this.isSameDocumentAs(uri) && uri.fragment == this.fragment;
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};
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/**
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* Normalizes the URI using syntax-based normalization.
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* This includes case normalization, percent-encoding normalization and path segment normalization.
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* XXX: Percent-encoding normalization does not escape characters that need to be escaped.
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* (Although that would not be a valid URI in the first place. See validate().)
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* See RFC 3986 section 6.2.2.
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*/
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URI.prototype.normalize = function() {
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this.removeDotSegments();
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if (this.scheme)
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this.scheme = this.scheme.toLowerCase();
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if (this.authority)
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this.authority = this.authority.replace(authorityRegex, replaceAuthority).
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replace(caseRegex, replaceCase);
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if (this.path)
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this.path = this.path.replace(caseRegex, replaceCase);
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if (this.query)
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this.query = this.query.replace(caseRegex, replaceCase);
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if (this.fragment)
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this.fragment = this.fragment.replace(caseRegex, replaceCase);
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};
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var caseRegex = /%[0-9a-z]{2}/gi;
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var percentRegex = /[a-zA-Z0-9\-\._~]/;
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var authorityRegex = /(.*@)?([^@:]*)(:.*)?/;
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function replaceCase(str) {
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var dec = unescape(str);
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return percentRegex.test(dec) ? dec : str.toUpperCase();
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}
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function replaceAuthority(str, p1, p2, p3) {
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return (p1 || '') + p2.toLowerCase() + (p3 || '');
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}
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/**
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* Resolve a relative URI (this) against a base URI.
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* The base URI must be an absolute URI.
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* See RFC 3986 section 5.2
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*/
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URI.prototype.resolve = function(baseURI) {
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var uri = new URI();
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if (this.scheme) {
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uri.scheme = this.scheme;
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uri.authority = this.authority;
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uri.path = this.path;
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uri.query = this.query;
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} else {
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uri.scheme = baseURI.scheme;
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if (this.authority) {
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uri.authority = this.authority;
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uri.path = this.path;
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uri.query = this.query;
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} else {
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uri.authority = baseURI.authority;
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if (this.path == '') {
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uri.path = baseURI.path;
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uri.query = this.query || baseURI.query;
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} else {
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if (this.path.charAt(0) == '/') {
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uri.path = this.path;
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uri.removeDotSegments();
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} else {
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if (baseURI.authority && baseURI.path == '') {
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uri.path = '/' + this.path;
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} else {
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uri.path = baseURI.path.substring(0, baseURI.path.lastIndexOf('/') + 1) + this.path;
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}
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uri.removeDotSegments();
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}
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uri.query = this.query;
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}
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}
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}
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uri.fragment = this.fragment;
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return uri;
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};
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/**
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* Remove dot segments from path.
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* See RFC 3986 section 5.2.4
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* @private
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*/
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URI.prototype.removeDotSegments = function() {
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var input = this.path.split('/'),
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output = [],
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segment,
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absPath = input[0] == '';
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if (absPath)
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input.shift();
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var sFirst = input[0] == '' ? input.shift() : null;
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while (input.length) {
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segment = input.shift();
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if (segment == '..') {
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output.pop();
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} else if (segment != '.') {
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output.push(segment);
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}
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}
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if (segment == '.' || segment == '..')
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output.push('');
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if (absPath)
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output.unshift('');
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this.path = output.join('/');
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};
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// We don't like this function because it builds up a cache that is never cleared.
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// /**
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// * Resolves a relative URI against an absolute base URI.
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// * Convenience method.
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// * @param {String} uri the relative URI to resolve
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// * @param {String} baseURI the base URI (must be absolute) to resolve against
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// */
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// URI.resolve = function(sURI, sBaseURI) {
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// var uri = cache[sURI] || (cache[sURI] = new URI(sURI));
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// var baseURI = cache[sBaseURI] || (cache[sBaseURI] = new URI(sBaseURI));
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// return uri.resolve(baseURI).toString();
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// };
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// var cache = {};
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/**
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* Serialises the URI to a string.
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*/
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URI.prototype.toString = function() {
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var result = '';
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if (this.scheme)
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result += this.scheme + ':';
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if (this.authority)
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result += '//' + this.authority;
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result += this.path;
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if (this.query)
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result += '?' + this.query;
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if (this.fragment)
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result += '#' + this.fragment;
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return result;
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};
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/**
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* @private
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*/
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function appendForwardSlash(url) {
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if (url.length === 0 || url[url.length - 1] !== '/') {
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url = url + '/';
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}
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return url;
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}
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/**
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* Clones an object, returning a new object containing the same properties.
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*
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* @exports clone
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*
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* @param {Object} object The object to clone.
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* @param {Boolean} [deep=false] If true, all properties will be deep cloned recursively.
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* @returns {Object} The cloned object.
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*/
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function clone(object, deep) {
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if (object === null || typeof object !== 'object') {
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return object;
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}
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deep = when.defaultValue(deep, false);
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var result = new object.constructor();
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for ( var propertyName in object) {
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if (object.hasOwnProperty(propertyName)) {
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var value = object[propertyName];
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if (deep) {
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value = clone(value, deep);
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}
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result[propertyName] = value;
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}
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}
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return result;
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}
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/**
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* Merges two objects, copying their properties onto a new combined object. When two objects have the same
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* property, the value of the property on the first object is used. If either object is undefined,
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* it will be treated as an empty object.
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*
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* @example
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* var object1 = {
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* propOne : 1,
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* propTwo : {
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* value1 : 10
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* }
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* }
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* var object2 = {
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* propTwo : 2
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* }
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* var final = Cesium.combine(object1, object2);
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*
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* // final === {
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* // propOne : 1,
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* // propTwo : {
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* // value1 : 10
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* // }
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* // }
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*
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* @param {Object} [object1] The first object to merge.
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* @param {Object} [object2] The second object to merge.
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* @param {Boolean} [deep=false] Perform a recursive merge.
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* @returns {Object} The combined object containing all properties from both objects.
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*
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* @exports combine
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*/
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function combine(object1, object2, deep) {
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deep = when.defaultValue(deep, false);
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var result = {};
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var object1Defined = when.defined(object1);
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var object2Defined = when.defined(object2);
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var property;
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var object1Value;
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var object2Value;
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if (object1Defined) {
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for (property in object1) {
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if (object1.hasOwnProperty(property)) {
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object1Value = object1[property];
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if (object2Defined && deep && typeof object1Value === 'object' && object2.hasOwnProperty(property)) {
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object2Value = object2[property];
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if (typeof object2Value === 'object') {
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result[property] = combine(object1Value, object2Value, deep);
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} else {
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result[property] = object1Value;
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}
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} else {
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result[property] = object1Value;
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}
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}
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}
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}
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if (object2Defined) {
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for (property in object2) {
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if (object2.hasOwnProperty(property) && !result.hasOwnProperty(property)) {
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object2Value = object2[property];
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result[property] = object2Value;
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}
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}
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}
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return result;
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}
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/**
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* Given a relative Uri and a base Uri, returns the absolute Uri of the relative Uri.
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* @exports getAbsoluteUri
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*
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* @param {String} relative The relative Uri.
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* @param {String} [base] The base Uri.
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* @returns {String} The absolute Uri of the given relative Uri.
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*
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* @example
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* //absolute Uri will be "https://test.com/awesome.png";
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* var absoluteUri = Cesium.getAbsoluteUri('awesome.png', 'https://test.com');
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*/
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function getAbsoluteUri(relative, base) {
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var documentObject;
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if (typeof document !== 'undefined') {
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documentObject = document;
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}
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return getAbsoluteUri._implementation(relative, base, documentObject);
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}
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getAbsoluteUri._implementation = function(relative, base, documentObject) {
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//>>includeStart('debug', pragmas.debug);
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if (!when.defined(relative)) {
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throw new Check.DeveloperError('relative uri is required.');
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}
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//>>includeEnd('debug');
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if (!when.defined(base)) {
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if (typeof documentObject === 'undefined') {
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return relative;
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}
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base = when.defaultValue(documentObject.baseURI, documentObject.location.href);
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}
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var baseUri = new URI(base);
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var relativeUri = new URI(relative);
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return relativeUri.resolve(baseUri).toString();
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};
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/**
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* Given a URI, returns the base path of the URI.
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* @exports getBaseUri
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*
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* @param {String} uri The Uri.
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* @param {Boolean} [includeQuery = false] Whether or not to include the query string and fragment form the uri
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* @returns {String} The base path of the Uri.
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*
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* @example
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* // basePath will be "/Gallery/";
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* var basePath = Cesium.getBaseUri('/Gallery/simple.czml?value=true&example=false');
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*
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* // basePath will be "/Gallery/?value=true&example=false";
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* var basePath = Cesium.getBaseUri('/Gallery/simple.czml?value=true&example=false', true);
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*/
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function getBaseUri(uri, includeQuery) {
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//>>includeStart('debug', pragmas.debug);
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if (!when.defined(uri)) {
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throw new Check.DeveloperError('uri is required.');
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}
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//>>includeEnd('debug');
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var basePath = '';
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var i = uri.lastIndexOf('/');
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if (i !== -1) {
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basePath = uri.substring(0, i + 1);
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}
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if (!includeQuery) {
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return basePath;
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}
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uri = new URI(uri);
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if (when.defined(uri.query)) {
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basePath += '?' + uri.query;
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}
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if (when.defined(uri.fragment)){
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basePath += '#' + uri.fragment;
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}
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return basePath;
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}
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/**
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* Given a URI, returns the extension of the URI.
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* @exports getExtensionFromUri
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*
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* @param {String} uri The Uri.
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* @returns {String} The extension of the Uri.
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*
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* @example
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* //extension will be "czml";
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* var extension = Cesium.getExtensionFromUri('/Gallery/simple.czml?value=true&example=false');
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*/
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function getExtensionFromUri(uri) {
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//>>includeStart('debug', pragmas.debug);
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if (!when.defined(uri)) {
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throw new Check.DeveloperError('uri is required.');
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}
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//>>includeEnd('debug');
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var uriObject = new URI(uri);
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uriObject.normalize();
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var path = uriObject.path;
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var index = path.lastIndexOf('/');
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if (index !== -1) {
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path = path.substr(index + 1);
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}
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index = path.lastIndexOf('.');
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if (index === -1) {
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path = '';
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} else {
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path = path.substr(index + 1);
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}
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return path;
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}
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var blobUriRegex = /^blob:/i;
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/**
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* Determines if the specified uri is a blob uri.
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*
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* @exports isBlobUri
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*
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* @param {String} uri The uri to test.
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* @returns {Boolean} true when the uri is a blob uri; otherwise, false.
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*
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* @private
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*/
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function isBlobUri(uri) {
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//>>includeStart('debug', pragmas.debug);
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Check.Check.typeOf.string('uri', uri);
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//>>includeEnd('debug');
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return blobUriRegex.test(uri);
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}
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var a;
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/**
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* Given a URL, determine whether that URL is considered cross-origin to the current page.
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*
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* @private
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*/
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function isCrossOriginUrl(url) {
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if (!when.defined(a)) {
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a = document.createElement('a');
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}
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// copy window location into the anchor to get consistent results
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// when the port is default for the protocol (e.g. 80 for HTTP)
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a.href = window.location.href;
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// host includes both hostname and port if the port is not standard
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var host = a.host;
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var protocol = a.protocol;
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a.href = url;
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// IE only absolutizes href on get, not set
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a.href = a.href; // eslint-disable-line no-self-assign
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return protocol !== a.protocol || host !== a.host;
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}
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var dataUriRegex = /^data:/i;
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/**
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* Determines if the specified uri is a data uri.
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*
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* @exports isDataUri
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*
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* @param {String} uri The uri to test.
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* @returns {Boolean} true when the uri is a data uri; otherwise, false.
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*
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* @private
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*/
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function isDataUri(uri) {
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//>>includeStart('debug', pragmas.debug);
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Check.Check.typeOf.string('uri', uri);
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//>>includeEnd('debug');
|
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return dataUriRegex.test(uri);
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}
|
|
/**
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* @private
|
*/
|
function loadAndExecuteScript(url) {
|
var deferred = when.when.defer();
|
var script = document.createElement('script');
|
script.async = true;
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script.src = url;
|
|
var head = document.getElementsByTagName('head')[0];
|
script.onload = function() {
|
script.onload = undefined;
|
head.removeChild(script);
|
deferred.resolve();
|
};
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script.onerror = function(e) {
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deferred.reject(e);
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};
|
|
head.appendChild(script);
|
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return deferred.promise;
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}
|
|
/**
|
* Converts an object representing a set of name/value pairs into a query string,
|
* with names and values encoded properly for use in a URL. Values that are arrays
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* will produce multiple values with the same name.
|
* @exports objectToQuery
|
*
|
* @param {Object} obj The object containing data to encode.
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* @returns {String} An encoded query string.
|
*
|
*
|
* @example
|
* var str = Cesium.objectToQuery({
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* key1 : 'some value',
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* key2 : 'a/b',
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* key3 : ['x', 'y']
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* });
|
*
|
* @see queryToObject
|
* // str will be:
|
* // 'key1=some%20value&key2=a%2Fb&key3=x&key3=y'
|
*/
|
function objectToQuery(obj, donotEncodeSpecialCharacters) {
|
//>>includeStart('debug', pragmas.debug);
|
if (!when.defined(obj)) {
|
throw new Check.DeveloperError('obj is required.');
|
}
|
//>>includeEnd('debug');
|
|
var result = '';
|
for ( var propName in obj) {
|
if (obj.hasOwnProperty(propName)) {
|
var value = obj[propName];
|
|
var part = encodeURIComponent(propName) + '=';
|
if (Array.isArray(value)) {
|
for (var i = 0, len = value.length; i < len; ++i) {
|
if (donotEncodeSpecialCharacters === true) {
|
result += part + encodeURI(value[i]) + '&';
|
} else {
|
result += part + encodeURIComponent(value[i]) + '&';
|
}
|
}
|
} else {
|
if (donotEncodeSpecialCharacters === true) {
|
result += part + encodeURI(value) + '&';
|
} else {
|
result += part + encodeURIComponent(value) + '&';
|
}
|
}
|
}
|
}
|
|
// trim last &
|
result = result.slice(0, -1);
|
|
// This function used to replace %20 with + which is more compact and readable.
|
// However, some servers didn't properly handle + as a space.
|
// https://github.com/CesiumGS/cesium/issues/2192
|
|
return result;
|
}
|
|
/**
|
* Parses a query string into an object, where the keys and values of the object are the
|
* name/value pairs from the query string, decoded. If a name appears multiple times,
|
* the value in the object will be an array of values.
|
* @exports queryToObject
|
*
|
* @param {String} queryString The query string.
|
* @returns {Object} An object containing the parameters parsed from the query string.
|
*
|
*
|
* @example
|
* var obj = Cesium.queryToObject('key1=some%20value&key2=a%2Fb&key3=x&key3=y');
|
* // obj will be:
|
* // {
|
* // key1 : 'some value',
|
* // key2 : 'a/b',
|
* // key3 : ['x', 'y']
|
* // }
|
*
|
* @see objectToQuery
|
*/
|
function queryToObject(queryString) {
|
//>>includeStart('debug', pragmas.debug);
|
if (!when.defined(queryString)) {
|
throw new Check.DeveloperError('queryString is required.');
|
}
|
//>>includeEnd('debug');
|
|
var result = {};
|
if (queryString === '') {
|
return result;
|
}
|
var parts = queryString.replace(/\+/g, '%20').split(/[&;]/);
|
for (var i = 0, len = parts.length; i < len; ++i) {
|
var subparts = parts[i].split('=');
|
if (subparts.length > 2) {
|
var index = parts[i].indexOf("=");
|
var key = parts[i].substring(0, index);
|
var strvalue = parts[i].substring(index + 1, parts[i].length);
|
subparts = [key, strvalue];
|
}
|
var name = decodeURIComponent(subparts[0]);
|
var value = subparts[1];
|
if (when.defined(value)) {
|
value = decodeURIComponent(value);
|
} else {
|
value = '';
|
}
|
|
var resultValue = result[name];
|
if (typeof resultValue === 'string') {
|
// expand the single value to an array
|
result[name] = [resultValue, value];
|
} else if (Array.isArray(resultValue)) {
|
resultValue.push(value);
|
} else {
|
result[name] = value;
|
}
|
}
|
return result;
|
}
|
|
/**
|
* State of the request.
|
*
|
* @exports RequestState
|
*/
|
var RequestState = {
|
/**
|
* Initial unissued state.
|
*
|
* @type Number
|
* @constant
|
*/
|
UNISSUED : 0,
|
|
/**
|
* Issued but not yet active. Will become active when open slots are available.
|
*
|
* @type Number
|
* @constant
|
*/
|
ISSUED : 1,
|
|
/**
|
* Actual http request has been sent.
|
*
|
* @type Number
|
* @constant
|
*/
|
ACTIVE : 2,
|
|
/**
|
* Request completed successfully.
|
*
|
* @type Number
|
* @constant
|
*/
|
RECEIVED : 3,
|
|
/**
|
* Request was cancelled, either explicitly or automatically because of low priority.
|
*
|
* @type Number
|
* @constant
|
*/
|
CANCELLED : 4,
|
|
/**
|
* Request failed.
|
*
|
* @type Number
|
* @constant
|
*/
|
FAILED : 5
|
};
|
var RequestState$1 = Object.freeze(RequestState);
|
|
/**
|
* An enum identifying the type of request. Used for finer grained logging and priority sorting.
|
*
|
* @exports RequestType
|
*/
|
var RequestType = {
|
/**
|
* Terrain request.
|
*
|
* @type Number
|
* @constant
|
*/
|
TERRAIN : 0,
|
|
/**
|
* Imagery request.
|
*
|
* @type Number
|
* @constant
|
*/
|
IMAGERY : 1,
|
|
/**
|
* 3D Tiles request.
|
*
|
* @type Number
|
* @constant
|
*/
|
TILES3D : 2,
|
|
/**
|
* Other request.
|
*
|
* @type Number
|
* @constant
|
*/
|
OTHER : 3,
|
PACK : 4,
|
BLOCK : 5,
|
BLOCKPACK : 6
|
};
|
|
var RequestType$1 = Object.freeze(RequestType);
|
|
/**
|
* Stores information for making a request. In general this does not need to be constructed directly.
|
*
|
* @alias Request
|
* @constructor
|
* @namespace
|
* @exports Request
|
* @param {Object} [options] An object with the following properties:
|
* @param {String} [options.url] The url to request.
|
* @param {Request~RequestCallback} [options.requestFunction] The function that makes the actual data request.
|
* @param {Request~CancelCallback} [options.cancelFunction] The function that is called when the request is cancelled.
|
* @param {Request~PriorityCallback} [options.priorityFunction] The function that is called to update the request's priority, which occurs once per frame.
|
* @param {Number} [options.priority=0.0] The initial priority of the request.
|
* @param {Boolean} [options.throttle=false] Whether to throttle and prioritize the request. If false, the request will be sent immediately. If true, the request will be throttled and sent based on priority.
|
* @param {Boolean} [options.throttleByServer=false] Whether to throttle the request by server.
|
* @param {RequestType} [options.type=RequestType.OTHER] The type of request.
|
*/
|
function Request(options) {
|
options = when.defaultValue(options, when.defaultValue.EMPTY_OBJECT);
|
|
var throttleByServer = when.defaultValue(options.throttleByServer, false);
|
var throttle = when.defaultValue(options.throttle, false);
|
|
/**
|
* The URL to request.
|
*
|
* @type {String}
|
*/
|
this.url = options.url;
|
|
/**
|
* The function that makes the actual data request.
|
*
|
* @type {Request~RequestCallback}
|
*/
|
this.requestFunction = options.requestFunction;
|
|
/**
|
* The function that is called when the request is cancelled.
|
*
|
* @type {Request~CancelCallback}
|
*/
|
this.cancelFunction = options.cancelFunction;
|
|
/**
|
* The function that is called to update the request's priority, which occurs once per frame.
|
*
|
* @type {Request~PriorityCallback}
|
*/
|
this.priorityFunction = options.priorityFunction;
|
|
/**
|
* Priority is a unit-less value where lower values represent higher priority.
|
* For world-based objects, this is usually the distance from the camera.
|
* A request that does not have a priority function defaults to a priority of 0.
|
*
|
* If priorityFunction is defined, this value is updated every frame with the result of that call.
|
*
|
* @type {Number}
|
* @default 0.0
|
*/
|
this.priority = when.defaultValue(options.priority, 0.0);
|
|
/**
|
* Whether to throttle and prioritize the request. If false, the request will be sent immediately. If true, the
|
* request will be throttled and sent based on priority.
|
*
|
* @type {Boolean}
|
* @readonly
|
*
|
* @default false
|
*/
|
this.throttle = throttle;
|
|
/**
|
* Whether to throttle the request by server. Browsers typically support about 6-8 parallel connections
|
* for HTTP/1 servers, and an unlimited amount of connections for HTTP/2 servers. Setting this value
|
* to <code>true</code> is preferable for requests going through HTTP/1 servers.
|
*
|
* @type {Boolean}
|
* @readonly
|
*
|
* @default false
|
*/
|
this.throttleByServer = throttleByServer;
|
|
/**
|
* Type of request.
|
*
|
* @type {RequestType}
|
* @readonly
|
*
|
* @default RequestType.OTHER
|
*/
|
this.type = when.defaultValue(options.type, RequestType$1.OTHER);
|
|
/**
|
* A key used to identify the server that a request is going to. It is derived from the url's authority and scheme.
|
*
|
* @type {String}
|
*
|
* @private
|
*/
|
this.serverKey = undefined;
|
|
/**
|
* The current state of the request.
|
*
|
* @type {RequestState}
|
* @readonly
|
*/
|
this.state = RequestState$1.UNISSUED;
|
|
/**
|
* The requests's deferred promise.
|
*
|
* @type {Object}
|
*
|
* @private
|
*/
|
this.deferred = undefined;
|
|
/**
|
* Whether the request was explicitly cancelled.
|
*
|
* @type {Boolean}
|
*
|
* @private
|
*/
|
this.cancelled = false;
|
}
|
|
/**
|
* Mark the request as cancelled.
|
*
|
* @private
|
*/
|
Request.prototype.cancel = function() {
|
this.cancelled = true;
|
};
|
|
/**
|
* Duplicates a Request instance.
|
*
|
* @param {Request} [result] The object onto which to store the result.
|
*
|
* @returns {Request} The modified result parameter or a new Resource instance if one was not provided.
|
*/
|
Request.prototype.clone = function(result) {
|
if (!when.defined(result)) {
|
return new Request(this);
|
}
|
|
result.url = this.url;
|
result.requestFunction = this.requestFunction;
|
result.cancelFunction = this.cancelFunction;
|
result.priorityFunction = this.priorityFunction;
|
result.priority = this.priority;
|
result.throttle = this.throttle;
|
result.throttleByServer = this.throttleByServer;
|
result.type = this.type;
|
result.serverKey = this.serverKey;
|
|
// These get defaulted because the cloned request hasn't been issued
|
result.state = this.RequestState.UNISSUED;
|
result.deferred = undefined;
|
result.cancelled = false;
|
|
return result;
|
};
|
|
/**
|
* Parses the result of XMLHttpRequest's getAllResponseHeaders() method into
|
* a dictionary.
|
*
|
* @exports parseResponseHeaders
|
*
|
* @param {String} headerString The header string returned by getAllResponseHeaders(). The format is
|
* described here: http://www.w3.org/TR/XMLHttpRequest/#the-getallresponseheaders()-method
|
* @returns {Object} A dictionary of key/value pairs, where each key is the name of a header and the corresponding value
|
* is that header's value.
|
*
|
* @private
|
*/
|
function parseResponseHeaders(headerString) {
|
var headers = {};
|
|
if (!headerString) {
|
return headers;
|
}
|
|
var headerPairs = headerString.split('\u000d\u000a');
|
|
for (var i = 0; i < headerPairs.length; ++i) {
|
var headerPair = headerPairs[i];
|
// Can't use split() here because it does the wrong thing
|
// if the header value has the string ": " in it.
|
var index = headerPair.indexOf('\u003a\u0020');
|
if (index > 0) {
|
var key = headerPair.substring(0, index);
|
var val = headerPair.substring(index + 2);
|
headers[key] = val;
|
}
|
}
|
|
return headers;
|
}
|
|
/**
|
* An event that is raised when a request encounters an error.
|
*
|
* @constructor
|
* @alias RequestErrorEvent
|
*
|
* @param {Number} [statusCode] The HTTP error status code, such as 404.
|
* @param {Object} [response] The response included along with the error.
|
* @param {String|Object} [responseHeaders] The response headers, represented either as an object literal or as a
|
* string in the format returned by XMLHttpRequest's getAllResponseHeaders() function.
|
*/
|
function RequestErrorEvent(statusCode, response, responseHeaders) {
|
/**
|
* The HTTP error status code, such as 404. If the error does not have a particular
|
* HTTP code, this property will be undefined.
|
*
|
* @type {Number}
|
*/
|
this.statusCode = statusCode;
|
|
/**
|
* The response included along with the error. If the error does not include a response,
|
* this property will be undefined.
|
*
|
* @type {Object}
|
*/
|
this.response = response;
|
|
/**
|
* The headers included in the response, represented as an object literal of key/value pairs.
|
* If the error does not include any headers, this property will be undefined.
|
*
|
* @type {Object}
|
*/
|
this.responseHeaders = responseHeaders;
|
|
if (typeof this.responseHeaders === 'string') {
|
this.responseHeaders = parseResponseHeaders(this.responseHeaders);
|
}
|
}
|
|
/**
|
* Creates a string representing this RequestErrorEvent.
|
* @memberof RequestErrorEvent
|
*
|
* @returns {String} A string representing the provided RequestErrorEvent.
|
*/
|
RequestErrorEvent.prototype.toString = function() {
|
var str = 'Request has failed.';
|
if (when.defined(this.statusCode)) {
|
str += ' Status Code: ' + this.statusCode;
|
}
|
return str;
|
};
|
|
/**
|
* A generic utility class for managing subscribers for a particular event.
|
* This class is usually instantiated inside of a container class and
|
* exposed as a property for others to subscribe to.
|
*
|
* @alias Event
|
* @constructor
|
* @example
|
* MyObject.prototype.myListener = function(arg1, arg2) {
|
* this.myArg1Copy = arg1;
|
* this.myArg2Copy = arg2;
|
* }
|
*
|
* var myObjectInstance = new MyObject();
|
* var evt = new Cesium.Event();
|
* evt.addEventListener(MyObject.prototype.myListener, myObjectInstance);
|
* evt.raiseEvent('1', '2');
|
* evt.removeEventListener(MyObject.prototype.myListener);
|
*/
|
function Event() {
|
this._listeners = [];
|
this._scopes = [];
|
this._toRemove = [];
|
this._insideRaiseEvent = false;
|
}
|
|
Object.defineProperties(Event.prototype, {
|
/**
|
* The number of listeners currently subscribed to the event.
|
* @memberof Event.prototype
|
* @type {Number}
|
* @readonly
|
*/
|
numberOfListeners : {
|
get : function() {
|
return this._listeners.length - this._toRemove.length;
|
}
|
}
|
});
|
|
/**
|
* Registers a callback function to be executed whenever the event is raised.
|
* An optional scope can be provided to serve as the <code>this</code> pointer
|
* in which the function will execute.
|
*
|
* @param {Function} listener The function to be executed when the event is raised.
|
* @param {Object} [scope] An optional object scope to serve as the <code>this</code>
|
* pointer in which the listener function will execute.
|
* @returns {Event~RemoveCallback} A function that will remove this event listener when invoked.
|
*
|
* @see Event#raiseEvent
|
* @see Event#removeEventListener
|
*/
|
Event.prototype.addEventListener = function(listener, scope) {
|
//>>includeStart('debug', pragmas.debug);
|
Check.Check.typeOf.func('listener', listener);
|
//>>includeEnd('debug');
|
|
this._listeners.push(listener);
|
this._scopes.push(scope);
|
|
var event = this;
|
return function() {
|
event.removeEventListener(listener, scope);
|
};
|
};
|
|
/**
|
* Unregisters a previously registered callback.
|
*
|
* @param {Function} listener The function to be unregistered.
|
* @param {Object} [scope] The scope that was originally passed to addEventListener.
|
* @returns {Boolean} <code>true</code> if the listener was removed; <code>false</code> if the listener and scope are not registered with the event.
|
*
|
* @see Event#addEventListener
|
* @see Event#raiseEvent
|
*/
|
Event.prototype.removeEventListener = function(listener, scope) {
|
//>>includeStart('debug', pragmas.debug);
|
Check.Check.typeOf.func('listener', listener);
|
//>>includeEnd('debug');
|
|
var listeners = this._listeners;
|
var scopes = this._scopes;
|
|
var index = -1;
|
for (var i = 0; i < listeners.length; i++) {
|
if (listeners[i] === listener && scopes[i] === scope) {
|
index = i;
|
break;
|
}
|
}
|
|
if (index !== -1) {
|
if (this._insideRaiseEvent) {
|
//In order to allow removing an event subscription from within
|
//a callback, we don't actually remove the items here. Instead
|
//remember the index they are at and undefined their value.
|
this._toRemove.push(index);
|
listeners[index] = undefined;
|
scopes[index] = undefined;
|
} else {
|
listeners.splice(index, 1);
|
scopes.splice(index, 1);
|
}
|
return true;
|
}
|
|
return false;
|
};
|
|
function compareNumber(a,b) {
|
return b - a;
|
}
|
|
/**
|
* Raises the event by calling each registered listener with all supplied arguments.
|
*
|
* @param {*} arguments This method takes any number of parameters and passes them through to the listener functions.
|
*
|
* @see Event#addEventListener
|
* @see Event#removeEventListener
|
*/
|
Event.prototype.raiseEvent = function() {
|
this._insideRaiseEvent = true;
|
|
var i;
|
var listeners = this._listeners;
|
var scopes = this._scopes;
|
var length = listeners.length;
|
|
for (i = 0; i < length; i++) {
|
var listener = listeners[i];
|
if (when.defined(listener)) {
|
listeners[i].apply(scopes[i], arguments);
|
}
|
}
|
|
//Actually remove items removed in removeEventListener.
|
var toRemove = this._toRemove;
|
length = toRemove.length;
|
if (length > 0) {
|
toRemove.sort(compareNumber);
|
for (i = 0; i < length; i++) {
|
var index = toRemove[i];
|
listeners.splice(index, 1);
|
scopes.splice(index, 1);
|
}
|
toRemove.length = 0;
|
}
|
|
this._insideRaiseEvent = false;
|
};
|
|
/**
|
* Array implementation of a heap.
|
*
|
* @alias Heap
|
* @constructor
|
* @private
|
*
|
* @param {Object} options Object with the following properties:
|
* @param {Heap~ComparatorCallback} options.comparator The comparator to use for the heap. If comparator(a, b) is less than 0, sort a to a lower index than b, otherwise sort to a higher index.
|
*/
|
function Heap(options) {
|
//>>includeStart('debug', pragmas.debug);
|
Check.Check.typeOf.object('options', options);
|
Check.Check.defined('options.comparator', options.comparator);
|
//>>includeEnd('debug');
|
|
this._comparator = options.comparator;
|
this._array = [];
|
this._length = 0;
|
this._maximumLength = undefined;
|
}
|
|
Object.defineProperties(Heap.prototype, {
|
/**
|
* Gets the length of the heap.
|
*
|
* @memberof Heap.prototype
|
*
|
* @type {Number}
|
* @readonly
|
*/
|
length : {
|
get : function() {
|
return this._length;
|
}
|
},
|
|
/**
|
* Gets the internal array.
|
*
|
* @memberof Heap.prototype
|
*
|
* @type {Array}
|
* @readonly
|
*/
|
internalArray : {
|
get : function() {
|
return this._array;
|
}
|
},
|
|
/**
|
* Gets and sets the maximum length of the heap.
|
*
|
* @memberof Heap.prototype
|
*
|
* @type {Number}
|
*/
|
maximumLength : {
|
get : function() {
|
return this._maximumLength;
|
},
|
set : function(value) {
|
this._maximumLength = value;
|
if (this._length > value && value > 0) {
|
this._length = value;
|
this._array.length = value;
|
}
|
}
|
},
|
|
/**
|
* The comparator to use for the heap. If comparator(a, b) is less than 0, sort a to a lower index than b, otherwise sort to a higher index.
|
*
|
* @memberof Heap.prototype
|
*
|
* @type {Heap~ComparatorCallback}
|
*/
|
comparator : {
|
get : function() {
|
return this._comparator;
|
}
|
}
|
});
|
|
function swap(array, a, b) {
|
var temp = array[a];
|
array[a] = array[b];
|
array[b] = temp;
|
}
|
|
/**
|
* Resizes the internal array of the heap.
|
*
|
* @param {Number} [length] The length to resize internal array to. Defaults to the current length of the heap.
|
*/
|
Heap.prototype.reserve = function(length) {
|
length = when.defaultValue(length, this._length);
|
this._array.length = length;
|
};
|
|
/**
|
* Update the heap so that index and all descendants satisfy the heap property.
|
*
|
* @param {Number} [index=0] The starting index to heapify from.
|
*/
|
Heap.prototype.heapify = function(index) {
|
index = when.defaultValue(index, 0);
|
var length = this._length;
|
var comparator = this._comparator;
|
var array = this._array;
|
var candidate = -1;
|
var inserting = true;
|
|
while (inserting) {
|
var right = 2 * (index + 1);
|
var left = right - 1;
|
|
if (left < length && comparator(array[left], array[index]) < 0) {
|
candidate = left;
|
} else {
|
candidate = index;
|
}
|
|
if (right < length && comparator(array[right], array[candidate]) < 0) {
|
candidate = right;
|
}
|
if (candidate !== index) {
|
swap(array, candidate, index);
|
index = candidate;
|
} else {
|
inserting = false;
|
}
|
}
|
};
|
|
/**
|
* Resort the heap.
|
*/
|
Heap.prototype.resort = function() {
|
var length = this._length;
|
for (var i = Math.ceil(length / 2); i >= 0; --i) {
|
this.heapify(i);
|
}
|
};
|
|
/**
|
* Insert an element into the heap. If the length would grow greater than maximumLength
|
* of the heap, extra elements are removed.
|
*
|
* @param {*} element The element to insert
|
*
|
* @return {*} The element that was removed from the heap if the heap is at full capacity.
|
*/
|
Heap.prototype.insert = function(element) {
|
//>>includeStart('debug', pragmas.debug);
|
Check.Check.defined('element', element);
|
//>>includeEnd('debug');
|
|
var array = this._array;
|
var comparator = this._comparator;
|
var maximumLength = this._maximumLength;
|
|
var index = this._length++;
|
if (index < array.length) {
|
array[index] = element;
|
} else {
|
array.push(element);
|
}
|
|
while (index !== 0) {
|
var parent = Math.floor((index - 1) / 2);
|
if (comparator(array[index], array[parent]) < 0) {
|
swap(array, index, parent);
|
index = parent;
|
} else {
|
break;
|
}
|
}
|
|
var removedElement;
|
|
if (when.defined(maximumLength) && (this._length > maximumLength)) {
|
removedElement = array[maximumLength];
|
array.pop();
|
this._length = maximumLength;
|
}
|
|
return removedElement;
|
};
|
|
/**
|
* Remove the element specified by index from the heap and return it.
|
*
|
* @param {Number} [index=0] The index to remove.
|
* @returns {*} The specified element of the heap.
|
*/
|
Heap.prototype.pop = function(index) {
|
index = when.defaultValue(index, 0);
|
if (this._length === 0) {
|
return undefined;
|
}
|
//>>includeStart('debug', pragmas.debug);
|
Check.Check.typeOf.number.lessThan('index', index, this._length);
|
//>>includeEnd('debug');
|
|
var array = this._array;
|
var root = array[index];
|
swap(array, index, --this._length);
|
array[this._length] = undefined;
|
this.heapify(index);
|
return root;
|
};
|
|
/**
|
* Gets a timestamp that can be used in measuring the time between events. Timestamps
|
* are expressed in milliseconds, but it is not specified what the milliseconds are
|
* measured from. This function uses performance.now() if it is available, or Date.now()
|
* otherwise.
|
*
|
* @exports getTimestamp
|
*
|
* @returns {Number} The timestamp in milliseconds since some unspecified reference time.
|
*/
|
var getTimestamp;
|
|
if (typeof performance !== 'undefined' && typeof performance.now === 'function' && isFinite(performance.now())) {
|
getTimestamp = function() {
|
return performance.now();
|
};
|
} else {
|
getTimestamp = function() {
|
return Date.now();
|
};
|
}
|
var getTimestamp$1 = getTimestamp;
|
|
function sortRequests(a, b) {
|
return a.priority - b.priority;
|
}
|
|
var statistics = {
|
numberOfAttemptedRequests : 0,
|
numberOfActiveRequests : 0,
|
numberOfCancelledRequests : 0,
|
numberOfCancelledActiveRequests : 0,
|
numberOfFailedRequests : 0,
|
numberOfActiveRequestsEver : 0,
|
lastNumberOfActiveRequests : 0,
|
totalRequestTime : 0
|
};
|
|
var priorityHeapLength = 20;
|
var requestHeap = new Heap({
|
comparator : sortRequests
|
});
|
requestHeap.maximumLength = priorityHeapLength;
|
requestHeap.reserve(priorityHeapLength);
|
|
var activeRequests = [];
|
var numberOfActiveRequestsByServer = {};
|
|
var pageUri = typeof document !== 'undefined' ? new URI(document.location.href) : new URI();
|
|
var requestCompletedEvent = new Event();
|
|
/**
|
* Tracks the number of active requests and prioritizes incoming requests.
|
*
|
* @exports RequestScheduler
|
*
|
* @private
|
*/
|
function RequestScheduler() {
|
}
|
|
RequestScheduler.statisticRequestTime = -1;
|
|
/**
|
* The maximum number of simultaneous active requests. Un-throttled requests do not observe this limit.
|
* @type {Number}
|
* @default 50
|
*/
|
RequestScheduler.maximumRequests = 50;
|
|
/**
|
* The maximum number of simultaneous active requests per server. Un-throttled requests or servers specifically
|
* listed in requestsByServer do not observe this limit.
|
* @type {Number}
|
* @default 6
|
*/
|
RequestScheduler.maximumRequestsPerServer = 6;
|
|
RequestScheduler.perPacketCount = 20;//批量下载,每帧每个包的最大请求数限制,默认是20,不超过120
|
|
|
/**
|
* A per serverKey list of overrides to use for throttling instead of maximumRequestsPerServer
|
*/
|
RequestScheduler.requestsByServer = {
|
'api.cesium.com:443': 18,
|
'assets.cesium.com:443': 18
|
};
|
|
/**
|
* Specifies if the request scheduler should throttle incoming requests, or let the browser queue requests under its control.
|
* @type {Boolean}
|
* @default true
|
*/
|
RequestScheduler.throttleRequests = true;
|
|
/**
|
* When true, log statistics to the console every frame
|
* @type {Boolean}
|
* @default false
|
*/
|
RequestScheduler.debugShowStatistics = false;
|
|
/**
|
* An event that's raised when a request is completed. Event handlers are passed
|
* the error object if the request fails.
|
*
|
* @type {Event}
|
* @default Event()
|
*/
|
RequestScheduler.requestCompletedEvent = requestCompletedEvent;
|
|
Object.defineProperties(RequestScheduler, {
|
/**
|
* Returns the statistics used by the request scheduler.
|
*
|
* @memberof RequestScheduler
|
*
|
* @type Object
|
* @readonly
|
*/
|
statistics : {
|
get : function() {
|
return statistics;
|
}
|
},
|
|
/**
|
* The maximum size of the priority heap. This limits the number of requests that are sorted by priority. Only applies to requests that are not yet active.
|
*
|
* @memberof RequestScheduler
|
*
|
* @type {Number}
|
* @default 20
|
*/
|
priorityHeapLength : {
|
get : function() {
|
return priorityHeapLength;
|
},
|
set : function(value) {
|
// If the new length shrinks the heap, need to cancel some of the requests.
|
// Since this value is not intended to be tweaked regularly it is fine to just cancel the high priority requests.
|
if (value < priorityHeapLength) {
|
while (requestHeap.length > value) {
|
var request = requestHeap.pop();
|
cancelRequest(request);
|
}
|
}
|
priorityHeapLength = value;
|
requestHeap.maximumLength = value;
|
requestHeap.reserve(value);
|
}
|
}
|
});
|
|
function updatePriority(request) {
|
if (when.defined(request.priorityFunction)) {
|
request.priority = request.priorityFunction();
|
}
|
}
|
|
function serverHasOpenSlots(serverKey) {
|
var maxRequests = when.defaultValue(RequestScheduler.requestsByServer[serverKey], RequestScheduler.maximumRequestsPerServer);
|
return numberOfActiveRequestsByServer[serverKey] < maxRequests;
|
}
|
|
|
RequestScheduler.packRequestGroup = {};//每帧的所有需要打包的请求 : (serverIP + provider name), value :[request, request,...]
|
RequestScheduler.packRequestPromise = {};//每帧打包请求的promise (serverIP + provider name) : defer
|
RequestScheduler.packRequestQuadKey = {};//请求包的四叉树编码 (serverIP + provider name) : (quadkey;quadkey;...)
|
RequestScheduler.quadKeyIndex = {};//记录当前四叉树编码数组的索引
|
RequestScheduler.packRequestHeap = {};//每个图层对应一个二叉堆(serverIp + provider name) : heap
|
|
RequestScheduler.blockDefer = {};
|
RequestScheduler.blockRequest = {};
|
|
function getRequestKey(request) {
|
if(when.defined(request.packKey)){
|
return request.packKey;
|
}
|
|
request.packKey = request.serverKey + '_' + request.providerName;
|
return request.packKey;
|
}
|
|
function getRequestBlockKey(request){
|
if(when.defined(request.blockKey)){
|
return request.blockKey;
|
}
|
|
request.blockKey = request.serverKey + '_' + request.providerName + '_' + request.quadKey + request.url.substring(request.url.indexOf("dataVersion"));
|
return request.blockKey;
|
}
|
|
function preparePackRequest (request) {
|
var packKey = getRequestKey(request);
|
if(!when.defined(RequestScheduler.packRequestGroup[packKey])) {
|
RequestScheduler.packRequestGroup[packKey] = [];
|
}
|
|
if(!when.defined(RequestScheduler.packRequestQuadKey[packKey])) {
|
RequestScheduler.packRequestQuadKey[packKey] = '';
|
}
|
|
if(!when.defined(RequestScheduler.packRequestPromise[packKey])) {
|
RequestScheduler.packRequestPromise[packKey] = when.when.defer();
|
}
|
|
if(!when.defined(RequestScheduler.quadKeyIndex[packKey])) {
|
RequestScheduler.quadKeyIndex[packKey] = 0;
|
}
|
|
request.quadKeyIndex = RequestScheduler.quadKeyIndex[packKey]++;
|
request.deferred = RequestScheduler.packRequestPromise[packKey];
|
request.state = RequestState$1.ISSUED;
|
RequestScheduler.packRequestGroup[packKey].push(request);
|
return request.deferred.promise;
|
}
|
|
function prepareBlockRequest(request) {
|
var key = getRequestBlockKey(request);
|
var deferred = RequestScheduler.blockDefer[key];
|
if(!when.defined(deferred)) {
|
deferred = RequestScheduler.blockDefer[key] = when.when.defer();
|
RequestScheduler.blockRequest[key] = request;
|
}
|
|
request.deferred = deferred;
|
request.state = RequestState$1.ISSUED;
|
return request.deferred.promise;
|
}
|
|
function clearRequestPackets() {
|
RequestScheduler.packRequestGroup = {};
|
RequestScheduler.packRequestPromise = {};
|
RequestScheduler.packRequestQuadKey = {};
|
RequestScheduler.quadKeyIndex = {};
|
}
|
|
function clearBlockRequest() {
|
RequestScheduler.blockRequest = {};
|
}
|
|
function cancelAllRequests(requests) {
|
for(var i = 0,j = requests.length;i < j;i++) {
|
var request = requests[i];
|
request.state = RequestState$1.CANCELLED;
|
}
|
}
|
|
function combineQuadkey(reqGroup) {
|
var quadkeys = [];
|
var keyMap = {};
|
for(var i = 0,j = reqGroup.length;i < j;i++){
|
var request = reqGroup[i];
|
if(request.cancelled){
|
continue ;
|
}
|
var quadKey = request.quadKey;
|
if(keyMap[quadKey]){
|
continue;
|
}
|
keyMap[quadKey] = true;
|
quadkeys.push(quadKey);
|
}
|
return quadkeys;
|
}
|
|
function startPackingRequest() {
|
var packRequestGroup = RequestScheduler.packRequestGroup;
|
for(var key in packRequestGroup) {
|
if(packRequestGroup.hasOwnProperty(key)) {
|
var reqGroup = packRequestGroup[key];
|
if(reqGroup.length < 1) {
|
continue ;
|
}
|
|
var packRequest = reqGroup[0].clone();
|
var isTileMap = packRequest.url.indexOf("rest/maps") !== -1;
|
packRequest.serverKey = reqGroup[0].serverKey;
|
packRequest.state = reqGroup[0].state;
|
var oldUrl = packRequest.url;
|
|
var quadKeys = combineQuadkey(reqGroup);
|
if(quadKeys.length < 1){
|
continue ;
|
}
|
|
if (isTileMap) {
|
RequestScheduler.packRequestQuadKey[key] = quadKeys.join(',');
|
} else {
|
RequestScheduler.packRequestQuadKey[key] = quadKeys.join(';');
|
}
|
|
|
var quadKey = RequestScheduler.packRequestQuadKey[key];
|
if (packRequest.throttleByServer && !serverHasOpenSlots(packRequest.serverKey)) {
|
cancelAllRequests(reqGroup);
|
RequestScheduler.packRequestPromise[key].reject();
|
continue;
|
}
|
|
packRequest.deferred = RequestScheduler.packRequestPromise[key];
|
var uri = new URI(oldUrl);
|
if (isTileMap) {
|
uri.query = when.defined(uri.query) ? uri.query + '&tiles=' + quadKey : 'tiles=' + quadKey;
|
} else {
|
uri.query = when.defined(uri.query) ? uri.query + '&extratiles=' + quadKey : 'extratiles=' + quadKey;
|
}
|
|
packRequest.url = uri.toString();
|
startRequest(packRequest, packRequest.url);
|
}
|
}
|
|
clearRequestPackets();
|
}
|
|
function updateBlockRequest() {
|
var blockRequest = RequestScheduler.blockRequest;
|
for(var key in blockRequest) {
|
if(blockRequest.hasOwnProperty(key)) {
|
var request = blockRequest[key];
|
startRequest(request);
|
}
|
}
|
|
clearBlockRequest();
|
}
|
|
function issueRequest(request) {
|
if (request.state === RequestState$1.UNISSUED) {
|
request.state = RequestState$1.ISSUED;
|
if(request.type === RequestType$1.PACK || request.type === RequestType$1.BLOCKPACK){
|
var packKey = getRequestKey(request);
|
if(!when.defined(RequestScheduler.packRequestPromise[packKey])) {
|
RequestScheduler.packRequestPromise[packKey] = when.when.defer();
|
}
|
|
request.deferred = RequestScheduler.packRequestPromise[packKey];
|
|
}
|
else{
|
request.deferred = when.when.defer();
|
}
|
}
|
return request.deferred.promise;
|
}
|
|
function getRequestReceivedFunction(request) {
|
return function(results) {
|
if (request.state === RequestState$1.CANCELLED) {
|
// If the data request comes back but the request is cancelled, ignore it.
|
return;
|
}
|
--statistics.numberOfActiveRequests;
|
--numberOfActiveRequestsByServer[request.serverKey];
|
requestCompletedEvent.raiseEvent();
|
request.state = RequestState$1.RECEIVED;
|
request.deferred.resolve(results);
|
request.endTime = getTimestamp$1();
|
if(RequestScheduler.statisticRequestTime > 0 || request.type !== RequestType$1.OTHER) {
|
statistics.totalRequestTime += request.endTime - request.startTime;
|
}
|
|
if(request.type === RequestType$1.BLOCK || request.type === RequestType$1.BLOCKPACK){
|
var key = getRequestBlockKey(request);
|
if(when.defined(RequestScheduler.blockDefer[key])){
|
RequestScheduler.blockDefer[key] = undefined;
|
delete RequestScheduler.blockDefer[key];
|
}
|
|
}
|
};
|
}
|
|
function getRequestFailedFunction(request) {
|
return function(error) {
|
if (request.state === RequestState$1.CANCELLED) {
|
// If the data request comes back but the request is cancelled, ignore it.
|
return;
|
}
|
++statistics.numberOfFailedRequests;
|
--statistics.numberOfActiveRequests;
|
--numberOfActiveRequestsByServer[request.serverKey];
|
requestCompletedEvent.raiseEvent(error);
|
request.state = RequestState$1.FAILED;
|
request.deferred.reject(error);
|
};
|
}
|
|
function startRequest(request, url) {
|
var promise = issueRequest(request);
|
request.state = RequestState$1.ACTIVE;
|
activeRequests.push(request);
|
++statistics.numberOfActiveRequests;
|
++statistics.numberOfActiveRequestsEver;
|
++numberOfActiveRequestsByServer[request.serverKey];
|
request.startTime = getTimestamp$1();
|
request.requestFunction(url).then(getRequestReceivedFunction(request)).otherwise(getRequestFailedFunction(request));
|
return promise;
|
}
|
|
function cancelRequest(request) {
|
var active = request.state === RequestState$1.ACTIVE;
|
request.state = RequestState$1.CANCELLED;
|
++statistics.numberOfCancelledRequests;
|
request.deferred.reject();
|
|
if (active) {
|
--statistics.numberOfActiveRequests;
|
--numberOfActiveRequestsByServer[request.serverKey];
|
++statistics.numberOfCancelledActiveRequests;
|
}
|
|
if (when.defined(request.cancelFunction)) {
|
request.cancelFunction();
|
}
|
}
|
|
function updatePackRequestHeap() {
|
for(var key in RequestScheduler.packRequestHeap) {
|
if(RequestScheduler.packRequestHeap.hasOwnProperty(key)) {
|
var heap = RequestScheduler.packRequestHeap[key];
|
var issuedRequests = heap.internalArray;
|
var issuedLength = heap.length;
|
for (var i = 0; i < issuedLength; ++i) {
|
updatePriority(issuedRequests[i]);
|
}
|
heap.resort();
|
}
|
}
|
}
|
|
function packingRequest() {
|
for(var key in RequestScheduler.packRequestHeap) {
|
if(RequestScheduler.packRequestHeap.hasOwnProperty(key)) {
|
var heap = RequestScheduler.packRequestHeap[key];
|
while(heap.length > 0) {
|
var request = heap.pop();
|
if (request.cancelled) {
|
cancelRequest(request);
|
continue;
|
}
|
|
preparePackRequest(request);
|
}
|
}
|
}
|
|
startPackingRequest();
|
}
|
|
/**
|
* Sort requests by priority and start requests.
|
*/
|
RequestScheduler.update = function() {
|
var i;
|
var request;
|
|
// Loop over all active requests. Cancelled, failed, or received requests are removed from the array to make room for new requests.
|
var removeCount = 0;
|
var activeLength = activeRequests.length;
|
for (i = 0; i < activeLength; ++i) {
|
request = activeRequests[i];
|
if (request.cancelled) {
|
// Request was explicitly cancelled
|
cancelRequest(request);
|
}
|
if (request.state !== RequestState$1.ACTIVE) {
|
// Request is no longer active, remove from array
|
++removeCount;
|
continue;
|
}
|
if (removeCount > 0) {
|
// Shift back to fill in vacated slots from completed requests
|
activeRequests[i - removeCount] = request;
|
}
|
}
|
activeRequests.length -= removeCount;
|
|
// Update priority of issued requests and resort the heap
|
var issuedRequests = requestHeap.internalArray;
|
var issuedLength = requestHeap.length;
|
for (i = 0; i < issuedLength; ++i) {
|
updatePriority(issuedRequests[i]);
|
}
|
requestHeap.resort();
|
|
updatePackRequestHeap();
|
updateBlockRequest();
|
|
packingRequest();
|
|
// Get the number of open slots and fill with the highest priority requests.
|
// Un-throttled requests are automatically added to activeRequests, so activeRequests.length may exceed maximumRequests
|
var openSlots = Math.max(RequestScheduler.maximumRequests - activeRequests.length, 0);
|
var filledSlots = 0;
|
while (filledSlots < openSlots && requestHeap.length > 0) {
|
// Loop until all open slots are filled or the heap becomes empty
|
request = requestHeap.pop();
|
if (request.cancelled) {
|
// Request was explicitly cancelled
|
cancelRequest(request);
|
continue;
|
}
|
|
if (request.throttleByServer && !serverHasOpenSlots(request.serverKey)) {
|
// Open slots are available, but the request is throttled by its server. Cancel and try again later.
|
cancelRequest(request);
|
continue;
|
}
|
|
startRequest(request);
|
|
++filledSlots;
|
}
|
|
updateStatistics();
|
};
|
|
/**
|
* Get the server key from a given url.
|
*
|
* @param {String} url The url.
|
* @returns {String} The server key.
|
*/
|
RequestScheduler.getServerKey = function(url) {
|
//>>includeStart('debug', pragmas.debug);
|
Check.Check.typeOf.string('url', url);
|
//>>includeEnd('debug');
|
|
var uri = new URI(url).resolve(pageUri);
|
uri.normalize();
|
var serverKey = uri.authority;
|
if (!/:/.test(serverKey)) {
|
// If the authority does not contain a port number, add port 443 for https or port 80 for http
|
serverKey = serverKey + ':' + (uri.scheme === 'https' ? '443' : '80');
|
}
|
|
var length = numberOfActiveRequestsByServer[serverKey];
|
if (!when.defined(length)) {
|
numberOfActiveRequestsByServer[serverKey] = 0;
|
}
|
|
return serverKey;
|
};
|
|
function getPackRequestHeap(request) {
|
var packKey = getRequestKey(request);
|
var heap = RequestScheduler.packRequestHeap[packKey];
|
if(!when.defined(heap)) {
|
heap = RequestScheduler.packRequestHeap[packKey] = new Heap({
|
comparator : sortRequests
|
});
|
heap.maximumLength = RequestScheduler.perPacketCount;
|
heap.reserve(priorityHeapLength);
|
}
|
|
return heap;
|
}
|
|
/**
|
* Issue a request. If request.throttle is false, the request is sent immediately. Otherwise the request will be
|
* queued and sorted by priority before being sent.
|
*
|
* @param {Request} request The request object.
|
*
|
* @returns {Promise|undefined} A Promise for the requested data, or undefined if this request does not have high enough priority to be issued.
|
*/
|
RequestScheduler.request = function(request) {
|
//>>includeStart('debug', pragmas.debug);
|
Check.Check.typeOf.object('request', request);
|
Check.Check.typeOf.string('request.url', request.url);
|
Check.Check.typeOf.func('request.requestFunction', request.requestFunction);
|
//>>includeEnd('debug');
|
|
if (isDataUri(request.url) || isBlobUri(request.url)) {
|
requestCompletedEvent.raiseEvent();
|
request.state = RequestState$1.RECEIVED;
|
return request.requestFunction();
|
}
|
|
++statistics.numberOfAttemptedRequests;
|
|
if (!when.defined(request.serverKey)) {
|
request.serverKey = RequestScheduler.getServerKey(request.url);
|
}
|
|
if(request.type === RequestType$1.BLOCK) {
|
return prepareBlockRequest(request);
|
}
|
|
if (request.throttleByServer && !serverHasOpenSlots(request.serverKey)) {
|
// Server is saturated. Try again later.
|
return undefined;
|
}
|
|
if (!RequestScheduler.throttleRequests || !request.throttle) {
|
return startRequest(request);
|
}
|
|
if (activeRequests.length >= RequestScheduler.maximumRequests) {
|
// Active requests are saturated. Try again later.
|
return undefined;
|
}
|
|
// Insert into the priority heap and see if a request was bumped off. If this request is the lowest
|
// priority it will be returned.
|
updatePriority(request);
|
var removedRequest;
|
if(request.type === RequestType$1.PACK || request.type === RequestType$1.BLOCKPACK) {
|
var packRequestHeap = getPackRequestHeap(request);
|
|
|
var inset = true;
|
if(request.type === RequestType$1.BLOCKPACK){
|
for(var i=0; i<packRequestHeap.length; i++){
|
if(packRequestHeap._array[i].quadKey === request.quadKey){
|
request.blockRequest = packRequestHeap._array[i];
|
inset = false;
|
break;
|
}
|
}
|
}
|
|
if(inset){
|
removedRequest = packRequestHeap.insert(request);
|
}
|
|
}
|
else{
|
removedRequest = requestHeap.insert(request);
|
}
|
|
if (when.defined(removedRequest)) {
|
if (removedRequest === request) {
|
// Request does not have high enough priority to be issued
|
return undefined;
|
}
|
// A previously issued request has been bumped off the priority heap, so cancel it
|
cancelRequest(removedRequest);
|
}
|
|
return issueRequest(request);
|
};
|
|
function updateStatistics() {
|
if (!RequestScheduler.debugShowStatistics) {
|
return;
|
}
|
|
if (statistics.numberOfActiveRequests === 0 && statistics.lastNumberOfActiveRequests > 0) {
|
if (statistics.numberOfAttemptedRequests > 0) {
|
console.log('Number of attempted requests: ' + statistics.numberOfAttemptedRequests);
|
statistics.numberOfAttemptedRequests = 0;
|
}
|
|
if (statistics.numberOfCancelledRequests > 0) {
|
console.log('Number of cancelled requests: ' + statistics.numberOfCancelledRequests);
|
statistics.numberOfCancelledRequests = 0;
|
}
|
|
if (statistics.numberOfCancelledActiveRequests > 0) {
|
console.log('Number of cancelled active requests: ' + statistics.numberOfCancelledActiveRequests);
|
statistics.numberOfCancelledActiveRequests = 0;
|
}
|
|
if (statistics.numberOfFailedRequests > 0) {
|
console.log('Number of failed requests: ' + statistics.numberOfFailedRequests);
|
statistics.numberOfFailedRequests = 0;
|
}
|
}
|
|
statistics.lastNumberOfActiveRequests = statistics.numberOfActiveRequests;
|
}
|
|
/**
|
* For testing only. Clears any requests that may not have completed from previous tests.
|
*
|
* @private
|
*/
|
RequestScheduler.clearForSpecs = function() {
|
while (requestHeap.length > 0) {
|
var request = requestHeap.pop();
|
cancelRequest(request);
|
}
|
var length = activeRequests.length;
|
for (var i = 0; i < length; ++i) {
|
cancelRequest(activeRequests[i]);
|
}
|
activeRequests.length = 0;
|
numberOfActiveRequestsByServer = {};
|
|
// Clear stats
|
statistics.numberOfAttemptedRequests = 0;
|
statistics.numberOfActiveRequests = 0;
|
statistics.numberOfCancelledRequests = 0;
|
statistics.numberOfCancelledActiveRequests = 0;
|
statistics.numberOfFailedRequests = 0;
|
statistics.numberOfActiveRequestsEver = 0;
|
statistics.lastNumberOfActiveRequests = 0;
|
statistics.totalRequestTime = 0;
|
};
|
|
/**
|
* For testing only.
|
*
|
* @private
|
*/
|
RequestScheduler.numberOfActiveRequestsByServer = function(serverKey) {
|
return numberOfActiveRequestsByServer[serverKey];
|
};
|
|
/**
|
* For testing only.
|
*
|
* @private
|
*/
|
RequestScheduler.requestHeap = requestHeap;
|
|
/**
|
* A singleton that contains all of the servers that are trusted. Credentials will be sent with
|
* any requests to these servers.
|
*
|
* @exports TrustedServers
|
*
|
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
|
*/
|
var TrustedServers = {};
|
var _servers = {};
|
|
/**
|
* Adds a trusted server to the registry
|
*
|
* @param {String} host The host to be added.
|
* @param {Number} port The port used to access the host.
|
*
|
* @example
|
* // Add a trusted server
|
* TrustedServers.add('my.server.com', 80);
|
*/
|
TrustedServers.add = function(host, port) {
|
//>>includeStart('debug', pragmas.debug);
|
if (!when.defined(host)) {
|
throw new Check.DeveloperError('host is required.');
|
}
|
if (!when.defined(port) || port <= 0) {
|
throw new Check.DeveloperError('port is required to be greater than 0.');
|
}
|
//>>includeEnd('debug');
|
|
var authority = host.toLowerCase() + ':' + port;
|
if (!when.defined(_servers[authority])) {
|
_servers[authority] = true;
|
}
|
};
|
|
/**
|
* Removes a trusted server from the registry
|
*
|
* @param {String} host The host to be removed.
|
* @param {Number} port The port used to access the host.
|
*
|
* @example
|
* // Remove a trusted server
|
* TrustedServers.remove('my.server.com', 80);
|
*/
|
TrustedServers.remove = function(host, port) {
|
//>>includeStart('debug', pragmas.debug);
|
if (!when.defined(host)) {
|
throw new Check.DeveloperError('host is required.');
|
}
|
if (!when.defined(port) || port <= 0) {
|
throw new Check.DeveloperError('port is required to be greater than 0.');
|
}
|
//>>includeEnd('debug');
|
|
var authority = host.toLowerCase() + ':' + port;
|
if (when.defined(_servers[authority])) {
|
delete _servers[authority];
|
}
|
};
|
|
function getAuthority(url) {
|
var uri = new URI(url);
|
uri.normalize();
|
|
// Removes username:password@ so we just have host[:port]
|
var authority = uri.getAuthority();
|
if (!when.defined(authority)) {
|
return undefined; // Relative URL
|
}
|
|
if (authority.indexOf('@') !== -1) {
|
var parts = authority.split('@');
|
authority = parts[1];
|
}
|
|
// If the port is missing add one based on the scheme
|
if (authority.indexOf(':') === -1) {
|
var scheme = uri.getScheme();
|
if (!when.defined(scheme)) {
|
scheme = window.location.protocol;
|
scheme = scheme.substring(0, scheme.length-1);
|
}
|
if (scheme === 'http') {
|
authority += ':80';
|
} else if (scheme === 'https') {
|
authority += ':443';
|
} else {
|
return undefined;
|
}
|
}
|
|
return authority;
|
}
|
|
/**
|
* Tests whether a server is trusted or not. The server must have been added with the port if it is included in the url.
|
*
|
* @param {String} url The url to be tested against the trusted list
|
*
|
* @returns {boolean} Returns true if url is trusted, false otherwise.
|
*
|
* @example
|
* // Add server
|
* TrustedServers.add('my.server.com', 81);
|
*
|
* // Check if server is trusted
|
* if (TrustedServers.contains('https://my.server.com:81/path/to/file.png')) {
|
* // my.server.com:81 is trusted
|
* }
|
* if (TrustedServers.contains('https://my.server.com/path/to/file.png')) {
|
* // my.server.com isn't trusted
|
* }
|
*/
|
TrustedServers.contains = function(url) {
|
//>>includeStart('debug', pragmas.debug);
|
if (!when.defined(url)) {
|
throw new Check.DeveloperError('url is required.');
|
}
|
//>>includeEnd('debug');
|
var authority = getAuthority(url);
|
if (when.defined(authority) && when.defined(_servers[authority])) {
|
return true;
|
}
|
|
return false;
|
};
|
|
/**
|
* Clears the registry
|
*
|
* @example
|
* // Remove a trusted server
|
* TrustedServers.clear();
|
*/
|
TrustedServers.clear = function() {
|
_servers = {};
|
};
|
|
var warnings = {};
|
|
/**
|
* Logs a one time message to the console. Use this function instead of
|
* <code>console.log</code> directly since this does not log duplicate messages
|
* unless it is called from multiple workers.
|
*
|
* @exports oneTimeWarning
|
*
|
* @param {String} identifier The unique identifier for this warning.
|
* @param {String} [message=identifier] The message to log to the console.
|
*
|
* @example
|
* for(var i=0;i<foo.length;++i) {
|
* if (!defined(foo[i].bar)) {
|
* // Something that can be recovered from but may happen a lot
|
* oneTimeWarning('foo.bar undefined', 'foo.bar is undefined. Setting to 0.');
|
* foo[i].bar = 0;
|
* // ...
|
* }
|
* }
|
*
|
* @private
|
*/
|
function oneTimeWarning(identifier, message) {
|
//>>includeStart('debug', pragmas.debug);
|
if (!when.defined(identifier)) {
|
throw new Check.DeveloperError('identifier is required.');
|
}
|
//>>includeEnd('debug');
|
|
if (!when.defined(warnings[identifier])) {
|
warnings[identifier] = true;
|
console.warn(when.defaultValue(message, identifier));
|
}
|
}
|
|
oneTimeWarning.geometryOutlines = 'Entity geometry outlines are unsupported on terrain. Outlines will be disabled. To enable outlines, disable geometry terrain clamping by explicitly setting height to 0.';
|
|
oneTimeWarning.geometryZIndex = 'Entity geometry with zIndex are unsupported when height or extrudedHeight are defined. zIndex will be ignored';
|
|
oneTimeWarning.geometryHeightReference = 'Entity corridor, ellipse, polygon or rectangle with heightReference must also have a defined height. heightReference will be ignored';
|
oneTimeWarning.geometryExtrudedHeightReference = 'Entity corridor, ellipse, polygon or rectangle with extrudedHeightReference must also have a defined extrudedHeight. extrudedHeightReference will be ignored';
|
|
/**
|
* Logs a deprecation message to the console. Use this function instead of
|
* <code>console.log</code> directly since this does not log duplicate messages
|
* unless it is called from multiple workers.
|
*
|
* @exports deprecationWarning
|
*
|
* @param {String} identifier The unique identifier for this deprecated API.
|
* @param {String} message The message to log to the console.
|
*
|
* @example
|
* // Deprecated function or class
|
* function Foo() {
|
* deprecationWarning('Foo', 'Foo was deprecated in Cesium 1.01. It will be removed in 1.03. Use newFoo instead.');
|
* // ...
|
* }
|
*
|
* // Deprecated function
|
* Bar.prototype.func = function() {
|
* deprecationWarning('Bar.func', 'Bar.func() was deprecated in Cesium 1.01. It will be removed in 1.03. Use Bar.newFunc() instead.');
|
* // ...
|
* };
|
*
|
* // Deprecated property
|
* Object.defineProperties(Bar.prototype, {
|
* prop : {
|
* get : function() {
|
* deprecationWarning('Bar.prop', 'Bar.prop was deprecated in Cesium 1.01. It will be removed in 1.03. Use Bar.newProp instead.');
|
* // ...
|
* },
|
* set : function(value) {
|
* deprecationWarning('Bar.prop', 'Bar.prop was deprecated in Cesium 1.01. It will be removed in 1.03. Use Bar.newProp instead.');
|
* // ...
|
* }
|
* }
|
* });
|
*
|
* @private
|
*/
|
function deprecationWarning(identifier, message) {
|
//>>includeStart('debug', pragmas.debug);
|
if (!when.defined(identifier) || !when.defined(message)) {
|
throw new Check.DeveloperError('identifier and message are required.');
|
}
|
//>>includeEnd('debug');
|
|
oneTimeWarning(identifier, message);
|
}
|
|
var xhrBlobSupported = (function() {
|
try {
|
var xhr = new XMLHttpRequest();
|
xhr.open('GET', '#', true);
|
xhr.responseType = 'blob';
|
return xhr.responseType === 'blob';
|
} catch (e) {
|
return false;
|
}
|
})();
|
|
/**
|
* Parses a query string and returns the object equivalent.
|
*
|
* @param {Uri} uri The Uri with a query object.
|
* @param {Resource} resource The Resource that will be assigned queryParameters.
|
* @param {Boolean} merge If true, we'll merge with the resource's existing queryParameters. Otherwise they will be replaced.
|
* @param {Boolean} preserveQueryParameters If true duplicate parameters will be concatenated into an array. If false, keys in uri will take precedence.
|
*
|
* @private
|
*/
|
function parseQuery(uri, resource, merge, preserveQueryParameters) {
|
var queryString = uri.query;
|
if (!when.defined(queryString) || (queryString.length === 0)) {
|
return {};
|
}
|
|
var query;
|
// Special case we run into where the querystring is just a string, not key/value pairs
|
if (queryString.indexOf('=') === -1) {
|
var result = {};
|
result[queryString] = undefined;
|
query = result;
|
} else {
|
query = queryToObject(queryString);
|
}
|
|
if (merge) {
|
resource._queryParameters = combineQueryParameters(query, resource._queryParameters, preserveQueryParameters);
|
} else {
|
resource._queryParameters = query;
|
}
|
uri.query = undefined;
|
}
|
|
/**
|
* Converts a query object into a string.
|
*
|
* @param {Uri} uri The Uri object that will have the query object set.
|
* @param {Resource} resource The resource that has queryParameters
|
*
|
* @private
|
*/
|
function stringifyQuery(uri, resource) {
|
var queryObject = resource._queryParameters;
|
|
var keys = Object.keys(queryObject);
|
|
// We have 1 key with an undefined value, so this is just a string, not key/value pairs
|
if (keys.length === 1 && !when.defined(queryObject[keys[0]])) {
|
uri.query = keys[0];
|
} else {
|
uri.query = objectToQuery(queryObject);
|
}
|
}
|
|
/**
|
* Clones a value if it is defined, otherwise returns the default value
|
*
|
* @param {*} [val] The value to clone.
|
* @param {*} [defaultVal] The default value.
|
*
|
* @returns {*} A clone of val or the defaultVal.
|
*
|
* @private
|
*/
|
function defaultClone(val, defaultVal) {
|
if (!when.defined(val)) {
|
return defaultVal;
|
}
|
|
return when.defined(val.clone) ? val.clone() : clone(val);
|
}
|
|
/**
|
* Checks to make sure the Resource isn't already being requested.
|
*
|
* @param {Request} request The request to check.
|
*
|
* @private
|
*/
|
function checkAndResetRequest(request) {
|
if (request.state === RequestState$1.ISSUED || request.state === RequestState$1.ACTIVE) {
|
throw new RuntimeError.RuntimeError('The Resource is already being fetched.');
|
}
|
|
request.state = RequestState$1.UNISSUED;
|
request.deferred = undefined;
|
}
|
|
/**
|
* This combines a map of query parameters.
|
*
|
* @param {Object} q1 The first map of query parameters. Values in this map will take precedence if preserveQueryParameters is false.
|
* @param {Object} q2 The second map of query parameters.
|
* @param {Boolean} preserveQueryParameters If true duplicate parameters will be concatenated into an array. If false, keys in q1 will take precedence.
|
*
|
* @returns {Object} The combined map of query parameters.
|
*
|
* @example
|
* var q1 = {
|
* a: 1,
|
* b: 2
|
* };
|
* var q2 = {
|
* a: 3,
|
* c: 4
|
* };
|
* var q3 = {
|
* b: [5, 6],
|
* d: 7
|
* }
|
*
|
* // Returns
|
* // {
|
* // a: [1, 3],
|
* // b: 2,
|
* // c: 4
|
* // };
|
* combineQueryParameters(q1, q2, true);
|
*
|
* // Returns
|
* // {
|
* // a: 1,
|
* // b: 2,
|
* // c: 4
|
* // };
|
* combineQueryParameters(q1, q2, false);
|
*
|
* // Returns
|
* // {
|
* // a: 1,
|
* // b: [2, 5, 6],
|
* // d: 7
|
* // };
|
* combineQueryParameters(q1, q3, true);
|
*
|
* // Returns
|
* // {
|
* // a: 1,
|
* // b: 2,
|
* // d: 7
|
* // };
|
* combineQueryParameters(q1, q3, false);
|
*
|
* @private
|
*/
|
function combineQueryParameters(q1, q2, preserveQueryParameters) {
|
if (!preserveQueryParameters) {
|
return combine(q1, q2);
|
}
|
|
var result = clone(q1, true);
|
for (var param in q2) {
|
if (q2.hasOwnProperty(param)) {
|
var value = result[param];
|
var q2Value = q2[param];
|
if (when.defined(value)) {
|
if (!Array.isArray(value)) {
|
value = result[param] = [value];
|
}
|
|
result[param] = value.concat(q2Value);
|
} else {
|
result[param] = Array.isArray(q2Value) ? q2Value.slice() : q2Value;
|
}
|
}
|
}
|
|
return result;
|
}
|
|
/**
|
* A resource that includes the location and any other parameters we need to retrieve it or create derived resources. It also provides the ability to retry requests.
|
*
|
* @alias Resource
|
* @constructor
|
*
|
* @param {String|Object} options A url or an object with the following properties
|
* @param {String} options.url The url of the resource.
|
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
|
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
|
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
|
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
|
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
|
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
|
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
|
*
|
* @example
|
* function refreshTokenRetryCallback(resource, error) {
|
* if (error.statusCode === 403) {
|
* // 403 status code means a new token should be generated
|
* return getNewAccessToken()
|
* .then(function(token) {
|
* resource.queryParameters.access_token = token;
|
* return true;
|
* })
|
* .otherwise(function() {
|
* return false;
|
* });
|
* }
|
*
|
* return false;
|
* }
|
*
|
* var resource = new Resource({
|
* url: 'http://server.com/path/to/resource.json',
|
* proxy: new DefaultProxy('/proxy/'),
|
* headers: {
|
* 'X-My-Header': 'valueOfHeader'
|
* },
|
* queryParameters: {
|
* 'access_token': '123-435-456-000'
|
* },
|
* retryCallback: refreshTokenRetryCallback,
|
* retryAttempts: 1
|
* });
|
*/
|
function Resource(options) {
|
options = when.defaultValue(options, when.defaultValue.EMPTY_OBJECT);
|
if (typeof options === 'string') {
|
options = {
|
url: options
|
};
|
}
|
|
//>>includeStart('debug', pragmas.debug);
|
Check.Check.typeOf.string('options.url', options.url);
|
//>>includeEnd('debug');
|
|
this._url = undefined;
|
this._templateValues = defaultClone(options.templateValues, {});
|
this._queryParameters = defaultClone(options.queryParameters, {});
|
|
/**
|
* Additional HTTP headers that will be sent with the request.
|
*
|
* @type {Object}
|
*/
|
this.headers = defaultClone(options.headers, {});
|
|
/**
|
* A Request object that will be used. Intended for internal use only.
|
*
|
* @type {Request}
|
*/
|
this.request = when.defaultValue(options.request, new Request());
|
|
/**
|
* A proxy to be used when loading the resource.
|
*
|
* @type {DefaultProxy}
|
*/
|
this.proxy = options.proxy;
|
|
/**
|
* Function to call when a request for this resource fails. If it returns true or a Promise that resolves to true, the request will be retried.
|
*
|
* @type {Function}
|
*/
|
this.retryCallback = options.retryCallback;
|
|
/**
|
* The number of times the retryCallback should be called before giving up.
|
*
|
* @type {Number}
|
*/
|
this.retryAttempts = when.defaultValue(options.retryAttempts, 0);
|
this._retryCount = 0;
|
|
var uri = new URI(options.url);
|
parseQuery(uri, this, true, true);
|
|
// Remove the fragment as it's not sent with a request
|
uri.fragment = undefined;
|
|
this._url = uri.toString();
|
}
|
|
/**
|
* A helper function to create a resource depending on whether we have a String or a Resource
|
*
|
* @param {Resource|String} resource A Resource or a String to use when creating a new Resource.
|
*
|
* @returns {Resource} If resource is a String, a Resource constructed with the url and options. Otherwise the resource parameter is returned.
|
*
|
* @private
|
*/
|
Resource.createIfNeeded = function(resource) {
|
if (resource instanceof Resource) {
|
// Keep existing request object. This function is used internally to duplicate a Resource, so that it can't
|
// be modified outside of a class that holds it (eg. an imagery or terrain provider). Since the Request objects
|
// are managed outside of the providers, by the tile loading code, we want to keep the request property the same so if it is changed
|
// in the underlying tiling code the requests for this resource will use it.
|
return resource.getDerivedResource({
|
request: resource.request
|
});
|
}
|
|
if (typeof resource !== 'string') {
|
return resource;
|
}
|
|
return new Resource({
|
url: resource
|
});
|
};
|
|
var supportsImageBitmapOptionsPromise;
|
/**
|
* A helper function to check whether createImageBitmap supports passing ImageBitmapOptions.
|
*
|
* @returns {Promise<Boolean>} A promise that resolves to true if this browser supports creating an ImageBitmap with options.
|
*
|
* @private
|
*/
|
Resource.supportsImageBitmapOptions = function() {
|
// Until the HTML folks figure out what to do about this, we need to actually try loading an image to
|
// know if this browser supports passing options to the createImageBitmap function.
|
// https://github.com/whatwg/html/pull/4248
|
if (when.defined(supportsImageBitmapOptionsPromise)) {
|
return supportsImageBitmapOptionsPromise;
|
}
|
|
if (typeof createImageBitmap !== 'function') {
|
supportsImageBitmapOptionsPromise = when.when.resolve(false);
|
return supportsImageBitmapOptionsPromise;
|
}
|
|
var imageDataUri = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVQImWP4////fwAJ+wP9CNHoHgAAAABJRU5ErkJggg==';
|
|
supportsImageBitmapOptionsPromise = Resource.fetchBlob({
|
url : imageDataUri
|
})
|
.then(function(blob) {
|
return createImageBitmap(blob, {
|
imageOrientation: 'flipY',
|
premultiplyAlpha: 'none'
|
});
|
})
|
.then(function(imageBitmap) {
|
return true;
|
})
|
.otherwise(function() {
|
return false;
|
});
|
|
return supportsImageBitmapOptionsPromise;
|
};
|
|
Object.defineProperties(Resource, {
|
/**
|
* Returns true if blobs are supported.
|
*
|
* @memberof Resource
|
* @type {Boolean}
|
*
|
* @readonly
|
*/
|
isBlobSupported : {
|
get : function() {
|
return xhrBlobSupported;
|
}
|
}
|
});
|
|
Object.defineProperties(Resource.prototype, {
|
/**
|
* Query parameters appended to the url.
|
*
|
* @memberof Resource.prototype
|
* @type {Object}
|
*
|
* @readonly
|
*/
|
queryParameters: {
|
get: function() {
|
return this._queryParameters;
|
}
|
},
|
|
/**
|
* The key/value pairs used to replace template parameters in the url.
|
*
|
* @memberof Resource.prototype
|
* @type {Object}
|
*
|
* @readonly
|
*/
|
templateValues: {
|
get: function() {
|
return this._templateValues;
|
}
|
},
|
|
/**
|
* The url to the resource with template values replaced, query string appended and encoded by proxy if one was set.
|
*
|
* @memberof Resource.prototype
|
* @type {String}
|
*/
|
url: {
|
get: function() {
|
return this.getUrlComponent(true, true);
|
},
|
set: function(value) {
|
var uri = new URI(value);
|
|
parseQuery(uri, this, false);
|
|
// Remove the fragment as it's not sent with a request
|
uri.fragment = undefined;
|
|
this._url = uri.toString();
|
}
|
},
|
|
/**
|
* The file extension of the resource.
|
*
|
* @memberof Resource.prototype
|
* @type {String}
|
*
|
* @readonly
|
*/
|
extension: {
|
get: function() {
|
return getExtensionFromUri(this._url);
|
}
|
},
|
|
/**
|
* True if the Resource refers to a data URI.
|
*
|
* @memberof Resource.prototype
|
* @type {Boolean}
|
*/
|
isDataUri: {
|
get: function() {
|
return isDataUri(this._url);
|
}
|
},
|
|
/**
|
* True if the Resource refers to a blob URI.
|
*
|
* @memberof Resource.prototype
|
* @type {Boolean}
|
*/
|
isBlobUri: {
|
get: function() {
|
return isBlobUri(this._url);
|
}
|
},
|
|
/**
|
* True if the Resource refers to a cross origin URL.
|
*
|
* @memberof Resource.prototype
|
* @type {Boolean}
|
*/
|
isCrossOriginUrl: {
|
get: function() {
|
return isCrossOriginUrl(this._url);
|
}
|
},
|
|
/**
|
* True if the Resource has request headers. This is equivalent to checking if the headers property has any keys.
|
*
|
* @memberof Resource.prototype
|
* @type {Boolean}
|
*/
|
hasHeaders: {
|
get: function() {
|
return (Object.keys(this.headers).length > 0);
|
}
|
}
|
});
|
|
/**
|
* Returns the url, optional with the query string and processed by a proxy.
|
*
|
* @param {Boolean} [query=false] If true, the query string is included.
|
* @param {Boolean} [proxy=false] If true, the url is processed the proxy object if defined.
|
*
|
* @returns {String} The url with all the requested components.
|
*/
|
Resource.prototype.getUrlComponent = function(query, proxy) {
|
if(this.isDataUri) {
|
return this._url;
|
}
|
|
var uri = new URI(this._url);
|
|
if (query) {
|
stringifyQuery(uri, this);
|
}
|
|
// objectToQuery escapes the placeholders. Undo that.
|
var url = uri.toString().replace(/%7B/g, '{').replace(/%7D/g, '}');
|
|
var templateValues = this._templateValues;
|
url = url.replace(/{(.*?)}/g, function(match, key) {
|
var replacement = templateValues[key];
|
if (when.defined(replacement)) {
|
// use the replacement value from templateValues if there is one...
|
return encodeURIComponent(replacement);
|
}
|
// otherwise leave it unchanged
|
return match;
|
});
|
|
if (proxy && when.defined(this.proxy)) {
|
url = this.proxy.getURL(url);
|
}
|
return url;
|
};
|
|
/**
|
* Combines the specified object and the existing query parameters. This allows you to add many parameters at once,
|
* as opposed to adding them one at a time to the queryParameters property. If a value is already set, it will be replaced with the new value.
|
*
|
* @param {Object} params The query parameters
|
* @param {Boolean} [useAsDefault=false] If true the params will be used as the default values, so they will only be set if they are undefined.
|
*/
|
Resource.prototype.setQueryParameters = function(params, useAsDefault) {
|
if (useAsDefault) {
|
this._queryParameters = combineQueryParameters(this._queryParameters, params, false);
|
} else {
|
this._queryParameters = combineQueryParameters(params, this._queryParameters, false);
|
}
|
};
|
|
/**
|
* Combines the specified object and the existing query parameters. This allows you to add many parameters at once,
|
* as opposed to adding them one at a time to the queryParameters property.
|
*
|
* @param {Object} params The query parameters
|
*/
|
Resource.prototype.appendQueryParameters = function(params) {
|
this._queryParameters = combineQueryParameters(params, this._queryParameters, true);
|
};
|
|
/**
|
* Combines the specified object and the existing template values. This allows you to add many values at once,
|
* as opposed to adding them one at a time to the templateValues property. If a value is already set, it will become an array and the new value will be appended.
|
*
|
* @param {Object} template The template values
|
* @param {Boolean} [useAsDefault=false] If true the values will be used as the default values, so they will only be set if they are undefined.
|
*/
|
Resource.prototype.setTemplateValues = function(template, useAsDefault) {
|
if (useAsDefault) {
|
this._templateValues = combine(this._templateValues, template);
|
} else {
|
this._templateValues = combine(template, this._templateValues);
|
}
|
};
|
|
/**
|
* Returns a resource relative to the current instance. All properties remain the same as the current instance unless overridden in options.
|
*
|
* @param {Object} options An object with the following properties
|
* @param {String} [options.url] The url that will be resolved relative to the url of the current instance.
|
* @param {Object} [options.queryParameters] An object containing query parameters that will be combined with those of the current instance.
|
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}). These will be combined with those of the current instance.
|
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
|
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
|
* @param {Resource~RetryCallback} [options.retryCallback] The function to call when loading the resource fails.
|
* @param {Number} [options.retryAttempts] The number of times the retryCallback should be called before giving up.
|
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
|
* @param {Boolean} [options.preserveQueryParameters=false] If true, this will keep all query parameters from the current resource and derived resource. If false, derived parameters will replace those of the current resource.
|
*
|
* @returns {Resource} The resource derived from the current one.
|
*/
|
Resource.prototype.getDerivedResource = function(options) {
|
var resource = this.clone();
|
resource._retryCount = 0;
|
|
if (when.defined(options.url)) {
|
var uri = new URI(options.url);
|
|
var preserveQueryParameters = when.defaultValue(options.preserveQueryParameters, false);
|
parseQuery(uri, resource, true, preserveQueryParameters);
|
|
// Remove the fragment as it's not sent with a request
|
uri.fragment = undefined;
|
|
resource._url = uri.resolve(new URI(getAbsoluteUri(this._url))).toString();
|
}
|
|
if (when.defined(options.queryParameters)) {
|
resource._queryParameters = combine(options.queryParameters, resource._queryParameters);
|
}
|
if (when.defined(options.templateValues)) {
|
resource._templateValues = combine(options.templateValues, resource.templateValues);
|
}
|
if (when.defined(options.headers)) {
|
resource.headers = combine(options.headers, resource.headers);
|
}
|
if (when.defined(options.proxy)) {
|
resource.proxy = options.proxy;
|
}
|
if (when.defined(options.request)) {
|
resource.request = options.request;
|
}
|
if (when.defined(options.retryCallback)) {
|
resource.retryCallback = options.retryCallback;
|
}
|
if (when.defined(options.retryAttempts)) {
|
resource.retryAttempts = options.retryAttempts;
|
}
|
|
return resource;
|
};
|
|
/**
|
* Called when a resource fails to load. This will call the retryCallback function if defined until retryAttempts is reached.
|
*
|
* @param {Error} [error] The error that was encountered.
|
*
|
* @returns {Promise<Boolean>} A promise to a boolean, that if true will cause the resource request to be retried.
|
*
|
* @private
|
*/
|
Resource.prototype.retryOnError = function(error) {
|
var retryCallback = this.retryCallback;
|
if ((typeof retryCallback !== 'function') || (this._retryCount >= this.retryAttempts)) {
|
return when.when(false);
|
}
|
|
var that = this;
|
return when.when(retryCallback(this, error))
|
.then(function(result) {
|
++that._retryCount;
|
|
return result;
|
});
|
};
|
|
/**
|
* Duplicates a Resource instance.
|
*
|
* @param {Resource} [result] The object onto which to store the result.
|
*
|
* @returns {Resource} The modified result parameter or a new Resource instance if one was not provided.
|
*/
|
Resource.prototype.clone = function(result) {
|
if (!when.defined(result)) {
|
result = new Resource({
|
url : this._url
|
});
|
}
|
|
result._url = this._url;
|
result._queryParameters = clone(this._queryParameters);
|
result._templateValues = clone(this._templateValues);
|
result.headers = clone(this.headers);
|
result.proxy = this.proxy;
|
result.retryCallback = this.retryCallback;
|
result.retryAttempts = this.retryAttempts;
|
result._retryCount = 0;
|
result.request = this.request.clone();
|
|
return result;
|
};
|
|
/**
|
* Returns the base path of the Resource.
|
*
|
* @param {Boolean} [includeQuery = false] Whether or not to include the query string and fragment form the uri
|
*
|
* @returns {String} The base URI of the resource
|
*/
|
Resource.prototype.getBaseUri = function(includeQuery) {
|
return getBaseUri(this.getUrlComponent(includeQuery), includeQuery);
|
};
|
|
/**
|
* Appends a forward slash to the URL.
|
*/
|
Resource.prototype.appendForwardSlash = function() {
|
this._url = appendForwardSlash(this._url);
|
};
|
|
/**
|
* Asynchronously loads the resource as raw binary data. Returns a promise that will resolve to
|
* an ArrayBuffer once loaded, or reject if the resource failed to load. The data is loaded
|
* using XMLHttpRequest, which means that in order to make requests to another origin,
|
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled.
|
*
|
* @returns {Promise.<ArrayBuffer>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*
|
* @example
|
* // load a single URL asynchronously
|
* resource.fetchArrayBuffer().then(function(arrayBuffer) {
|
* // use the data
|
* }).otherwise(function(error) {
|
* // an error occurred
|
* });
|
*
|
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
|
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
|
*/
|
Resource.prototype.fetchArrayBuffer = function () {
|
return this.fetch({
|
responseType : 'arraybuffer'
|
});
|
};
|
|
/**
|
* Creates a Resource and calls fetchArrayBuffer() on it.
|
*
|
* @param {String|Object} options A url or an object with the following properties
|
* @param {String} options.url The url of the resource.
|
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
|
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
|
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
|
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
|
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
|
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
|
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
|
* @returns {Promise.<ArrayBuffer>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*/
|
Resource.fetchArrayBuffer = function (options) {
|
var resource = new Resource(options);
|
return resource.fetchArrayBuffer();
|
};
|
|
/**
|
* Asynchronously loads the given resource as a blob. Returns a promise that will resolve to
|
* a Blob once loaded, or reject if the resource failed to load. The data is loaded
|
* using XMLHttpRequest, which means that in order to make requests to another origin,
|
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled.
|
*
|
* @returns {Promise.<Blob>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*
|
* @example
|
* // load a single URL asynchronously
|
* resource.fetchBlob().then(function(blob) {
|
* // use the data
|
* }).otherwise(function(error) {
|
* // an error occurred
|
* });
|
*
|
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
|
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
|
*/
|
Resource.prototype.fetchBlob = function () {
|
return this.fetch({
|
responseType : 'blob'
|
});
|
};
|
|
/**
|
* Creates a Resource and calls fetchBlob() on it.
|
*
|
* @param {String|Object} options A url or an object with the following properties
|
* @param {String} options.url The url of the resource.
|
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
|
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
|
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
|
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
|
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
|
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
|
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
|
* @returns {Promise.<Blob>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*/
|
Resource.fetchBlob = function (options) {
|
var resource = new Resource(options);
|
return resource.fetchBlob();
|
};
|
|
/**
|
* Asynchronously loads the given image resource. Returns a promise that will resolve to
|
* an {@link https://developer.mozilla.org/en-US/docs/Web/API/ImageBitmap|ImageBitmap} if <code>preferImageBitmap</code> is true and the browser supports <code>createImageBitmap</code> or otherwise an
|
* {@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLImageElement|Image} once loaded, or reject if the image failed to load.
|
*
|
* @param {Object} [options] An object with the following properties.
|
* @param {Boolean} [options.preferBlob=false] If true, we will load the image via a blob.
|
* @param {Boolean} [options.preferImageBitmap=false] If true, image will be decoded during fetch and an <code>ImageBitmap</code> is returned.
|
* @param {Boolean} [options.flipY=false] If true, image will be vertically flipped during decode. Only applies if the browser supports <code>createImageBitmap</code>.
|
* @returns {Promise.<ImageBitmap>|Promise.<Image>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*
|
*
|
* @example
|
* // load a single image asynchronously
|
* resource.fetchImage().then(function(image) {
|
* // use the loaded image
|
* }).otherwise(function(error) {
|
* // an error occurred
|
* });
|
*
|
* // load several images in parallel
|
* when.all([resource1.fetchImage(), resource2.fetchImage()]).then(function(images) {
|
* // images is an array containing all the loaded images
|
* });
|
*
|
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
|
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
|
*/
|
Resource.prototype.fetchImage = function (options) {
|
options = when.defaultValue(options, when.defaultValue.EMPTY_OBJECT);
|
var preferImageBitmap = when.defaultValue(options.preferImageBitmap, false);
|
var preferBlob = when.defaultValue(options.preferBlob, false);
|
var flipY = when.defaultValue(options.flipY, false);
|
|
checkAndResetRequest(this.request);
|
|
// We try to load the image normally if
|
// 1. Blobs aren't supported
|
// 2. It's a data URI
|
// 3. It's a blob URI
|
// 4. It doesn't have request headers and we preferBlob is false
|
if (!xhrBlobSupported || this.isDataUri || this.isBlobUri || (!this.hasHeaders && !preferBlob)) {
|
return fetchImage({
|
resource: this,
|
flipY: flipY,
|
preferImageBitmap: preferImageBitmap
|
});
|
}
|
|
var blobPromise = this.fetchBlob();
|
if (!when.defined(blobPromise)) {
|
return;
|
}
|
|
var supportsImageBitmap;
|
var useImageBitmap;
|
var generatedBlobResource;
|
var generatedBlob;
|
return Resource.supportsImageBitmapOptions()
|
.then(function(result) {
|
supportsImageBitmap = result;
|
useImageBitmap = supportsImageBitmap && preferImageBitmap;
|
return blobPromise;
|
})
|
.then(function(blob) {
|
if (!when.defined(blob)) {
|
return;
|
}
|
generatedBlob = blob;
|
if (useImageBitmap) {
|
return Resource.createImageBitmapFromBlob(blob, {
|
flipY: flipY,
|
premultiplyAlpha: false
|
});
|
}
|
var blobUrl = window.URL.createObjectURL(blob);
|
generatedBlobResource = new Resource({
|
url: blobUrl
|
});
|
|
return fetchImage({
|
resource: generatedBlobResource,
|
flipY: flipY,
|
preferImageBitmap: false
|
});
|
})
|
.then(function(image) {
|
if (!when.defined(image)) {
|
return;
|
}
|
|
// The blob object may be needed for use by a TileDiscardPolicy,
|
// so attach it to the image.
|
image.blob = generatedBlob;
|
|
if (useImageBitmap) {
|
return image;
|
}
|
|
window.URL.revokeObjectURL(generatedBlobResource.url);
|
return image;
|
})
|
.otherwise(function(error) {
|
if (when.defined(generatedBlobResource)) {
|
window.URL.revokeObjectURL(generatedBlobResource.url);
|
}
|
|
// If the blob load succeeded but the image decode failed, attach the blob
|
// to the error object for use by a TileDiscardPolicy.
|
// In particular, BingMapsImageryProvider uses this to detect the
|
// zero-length response that is returned when a tile is not available.
|
error.blob = generatedBlob;
|
|
return when.when.reject(error);
|
});
|
};
|
|
/**
|
* Fetches an image and returns a promise to it.
|
*
|
* @param {Object} [options] An object with the following properties.
|
* @param {Resource} [options.resource] Resource object that points to an image to fetch.
|
* @param {Boolean} [options.preferImageBitmap] If true, image will be decoded during fetch and an <code>ImageBitmap</code> is returned.
|
* @param {Boolean} [options.flipY] If true, image will be vertically flipped during decode. Only applies if the browser supports <code>createImageBitmap</code>.
|
*
|
* @private
|
*/
|
function fetchImage(options) {
|
var resource = options.resource;
|
var flipY = options.flipY;
|
var preferImageBitmap = options.preferImageBitmap;
|
|
var request = resource.request;
|
request.url = resource.url;
|
request.requestFunction = function() {
|
var crossOrigin = false;
|
|
// data URIs can't have crossorigin set.
|
if (!resource.isDataUri && !resource.isBlobUri) {
|
crossOrigin = resource.isCrossOriginUrl;
|
}
|
|
var deferred = when.when.defer();
|
Resource._Implementations.createImage(request, crossOrigin, deferred, flipY, preferImageBitmap);
|
|
return deferred.promise;
|
};
|
|
var promise = RequestScheduler.request(request);
|
if (!when.defined(promise)) {
|
return;
|
}
|
|
return promise
|
.otherwise(function(e) {
|
// Don't retry cancelled or otherwise aborted requests
|
if (request.state !== RequestState$1.FAILED) {
|
return when.when.reject(e);
|
}
|
|
return resource.retryOnError(e)
|
.then(function(retry) {
|
if (retry) {
|
// Reset request so it can try again
|
request.state = RequestState$1.UNISSUED;
|
request.deferred = undefined;
|
|
return fetchImage({
|
resource: resource,
|
flipY: flipY,
|
preferImageBitmap: preferImageBitmap
|
});
|
}
|
|
return when.when.reject(e);
|
});
|
});
|
}
|
|
/**
|
* Creates a Resource and calls fetchImage() on it.
|
*
|
* @param {String|Object} options A url or an object with the following properties
|
* @param {String} options.url The url of the resource.
|
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
|
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
|
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
|
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
|
* @param {Boolean} [options.flipY=false] Whether to vertically flip the image during fetch and decode. Only applies when requesting an image and the browser supports <code>createImageBitmap</code>.
|
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
|
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
|
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
|
* @param {Boolean} [options.preferBlob=false] If true, we will load the image via a blob.
|
* @param {Boolean} [options.preferImageBitmap=false] If true, image will be decoded during fetch and an <code>ImageBitmap</code> is returned.
|
* @returns {Promise.<ImageBitmap>|Promise.<Image>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*/
|
Resource.fetchImage = function (options) {
|
var resource = new Resource(options);
|
return resource.fetchImage({
|
flipY: options.flipY,
|
preferBlob: options.preferBlob,
|
preferImageBitmap: options.preferImageBitmap
|
});
|
};
|
|
/**
|
* Asynchronously loads the given resource as text. Returns a promise that will resolve to
|
* a String once loaded, or reject if the resource failed to load. The data is loaded
|
* using XMLHttpRequest, which means that in order to make requests to another origin,
|
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled.
|
*
|
* @returns {Promise.<String>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*
|
* @example
|
* // load text from a URL, setting a custom header
|
* var resource = new Resource({
|
* url: 'http://someUrl.com/someJson.txt',
|
* headers: {
|
* 'X-Custom-Header' : 'some value'
|
* }
|
* });
|
* resource.fetchText().then(function(text) {
|
* // Do something with the text
|
* }).otherwise(function(error) {
|
* // an error occurred
|
* });
|
*
|
* @see {@link https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest|XMLHttpRequest}
|
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
|
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
|
*/
|
Resource.prototype.fetchText = function() {
|
return this.fetch({
|
responseType : 'text'
|
});
|
};
|
|
/**
|
* Creates a Resource and calls fetchText() on it.
|
*
|
* @param {String|Object} options A url or an object with the following properties
|
* @param {String} options.url The url of the resource.
|
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
|
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
|
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
|
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
|
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
|
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
|
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
|
* @returns {Promise.<String>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*/
|
Resource.fetchText = function (options) {
|
var resource = new Resource(options);
|
return resource.fetchText();
|
};
|
|
// note: */* below is */* but that ends the comment block early
|
/**
|
* Asynchronously loads the given resource as JSON. Returns a promise that will resolve to
|
* a JSON object once loaded, or reject if the resource failed to load. The data is loaded
|
* using XMLHttpRequest, which means that in order to make requests to another origin,
|
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled. This function
|
* adds 'Accept: application/json,*/*;q=0.01' to the request headers, if not
|
* already specified.
|
*
|
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*
|
*
|
* @example
|
* resource.fetchJson().then(function(jsonData) {
|
* // Do something with the JSON object
|
* }).otherwise(function(error) {
|
* // an error occurred
|
* });
|
*
|
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
|
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
|
*/
|
Resource.prototype.fetchJson = function() {
|
var promise = this.fetch({
|
responseType : 'text',
|
headers: {
|
Accept : 'application/json,*/*;q=0.01'
|
}
|
});
|
|
if (!when.defined(promise)) {
|
return undefined;
|
}
|
|
return promise
|
.then(function(value) {
|
if (!when.defined(value)) {
|
return;
|
}
|
return JSON.parse(value);
|
});
|
};
|
|
/**
|
* Creates a Resource and calls fetchJson() on it.
|
*
|
* @param {String|Object} options A url or an object with the following properties
|
* @param {String} options.url The url of the resource.
|
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
|
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
|
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
|
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
|
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
|
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
|
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
|
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*/
|
Resource.fetchJson = function (options) {
|
var resource = new Resource(options);
|
return resource.fetchJson();
|
};
|
|
/**
|
* Asynchronously loads the given resource as XML. Returns a promise that will resolve to
|
* an XML Document once loaded, or reject if the resource failed to load. The data is loaded
|
* using XMLHttpRequest, which means that in order to make requests to another origin,
|
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled.
|
*
|
* @returns {Promise.<XMLDocument>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*
|
*
|
* @example
|
* // load XML from a URL, setting a custom header
|
* Cesium.loadXML('http://someUrl.com/someXML.xml', {
|
* 'X-Custom-Header' : 'some value'
|
* }).then(function(document) {
|
* // Do something with the document
|
* }).otherwise(function(error) {
|
* // an error occurred
|
* });
|
*
|
* @see {@link https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest|XMLHttpRequest}
|
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
|
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
|
*/
|
Resource.prototype.fetchXML = function() {
|
return this.fetch({
|
responseType : 'document',
|
overrideMimeType : 'text/xml'
|
});
|
};
|
|
/**
|
* Creates a Resource and calls fetchXML() on it.
|
*
|
* @param {String|Object} options A url or an object with the following properties
|
* @param {String} options.url The url of the resource.
|
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
|
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
|
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
|
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
|
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
|
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
|
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
|
* @returns {Promise.<XMLDocument>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*/
|
Resource.fetchXML = function (options) {
|
var resource = new Resource(options);
|
return resource.fetchXML();
|
};
|
|
/**
|
* Requests a resource using JSONP.
|
*
|
* @param {String} [callbackParameterName='callback'] The callback parameter name that the server expects.
|
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*
|
*
|
* @example
|
* // load a data asynchronously
|
* resource.fetchJsonp().then(function(data) {
|
* // use the loaded data
|
* }).otherwise(function(error) {
|
* // an error occurred
|
* });
|
*
|
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
|
*/
|
Resource.prototype.fetchJsonp = function(callbackParameterName) {
|
callbackParameterName = when.defaultValue(callbackParameterName, 'callback');
|
|
checkAndResetRequest(this.request);
|
|
//generate a unique function name
|
var functionName;
|
do {
|
functionName = 'loadJsonp' + Math.random().toString().substring(2, 8);
|
} while (when.defined(window[functionName]));
|
|
return fetchJsonp(this, callbackParameterName, functionName);
|
};
|
|
function fetchJsonp(resource, callbackParameterName, functionName) {
|
var callbackQuery = {};
|
callbackQuery[callbackParameterName] = functionName;
|
resource.setQueryParameters(callbackQuery);
|
|
var request = resource.request;
|
request.url = resource.url;
|
request.requestFunction = function() {
|
var deferred = when.when.defer();
|
|
//assign a function with that name in the global scope
|
window[functionName] = function(data) {
|
deferred.resolve(data);
|
|
try {
|
delete window[functionName];
|
} catch (e) {
|
window[functionName] = undefined;
|
}
|
};
|
|
Resource._Implementations.loadAndExecuteScript(resource.url, functionName, deferred);
|
return deferred.promise;
|
};
|
|
var promise = RequestScheduler.request(request);
|
if (!when.defined(promise)) {
|
return;
|
}
|
|
return promise
|
.otherwise(function(e) {
|
if (request.state !== RequestState$1.FAILED) {
|
return when.when.reject(e);
|
}
|
|
return resource.retryOnError(e)
|
.then(function(retry) {
|
if (retry) {
|
// Reset request so it can try again
|
request.state = RequestState$1.UNISSUED;
|
request.deferred = undefined;
|
|
return fetchJsonp(resource, callbackParameterName, functionName);
|
}
|
|
return when.when.reject(e);
|
});
|
});
|
}
|
|
/**
|
* Creates a Resource from a URL and calls fetchJsonp() on it.
|
*
|
* @param {String|Object} options A url or an object with the following properties
|
* @param {String} options.url The url of the resource.
|
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
|
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
|
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
|
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
|
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
|
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
|
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
|
* @param {String} [options.callbackParameterName='callback'] The callback parameter name that the server expects.
|
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*/
|
Resource.fetchJsonp = function (options) {
|
var resource = new Resource(options);
|
return resource.fetchJsonp(options.callbackParameterName);
|
};
|
|
/**
|
* @private
|
*/
|
Resource.prototype._makeRequest = function(options) {
|
var resource = this;
|
checkAndResetRequest(resource.request);
|
|
var request = resource.request;
|
request.url = resource.url;
|
|
request.requestFunction = function(url) {
|
var responseType = options.responseType;
|
var headers = combine(options.headers, resource.headers);
|
var overrideMimeType = options.overrideMimeType;
|
var method = options.method;
|
var data = options.data;
|
var deferred = when.when.defer();
|
var newUrl = when.defined(url) ? url : resource.url;
|
var xhr = Resource._Implementations.loadWithXhr(newUrl, responseType, method, data, headers, deferred, overrideMimeType);
|
if (when.defined(xhr) && when.defined(xhr.abort)) {
|
request.cancelFunction = function() {
|
xhr.abort();
|
};
|
}
|
return deferred.promise;
|
};
|
|
var promise = RequestScheduler.request(request);
|
if (!when.defined(promise)) {
|
return;
|
}
|
|
return promise
|
.then(function(data) {
|
return data;
|
})
|
.otherwise(function(e) {
|
if (request.state !== RequestState$1.FAILED) {
|
return when.when.reject(e);
|
}
|
|
return resource.retryOnError(e)
|
.then(function(retry) {
|
if (retry) {
|
// Reset request so it can try again
|
request.state = RequestState$1.UNISSUED;
|
request.deferred = undefined;
|
|
return resource.fetch(options);
|
}
|
|
return when.when.reject(e);
|
});
|
});
|
};
|
|
var dataUriRegex$1 = /^data:(.*?)(;base64)?,(.*)$/;
|
|
function decodeDataUriText(isBase64, data) {
|
var result = decodeURIComponent(data);
|
if (isBase64) {
|
return atob(result);
|
}
|
return result;
|
}
|
|
function decodeDataUriArrayBuffer(isBase64, data) {
|
var byteString = decodeDataUriText(isBase64, data);
|
var buffer = new ArrayBuffer(byteString.length);
|
var view = new Uint8Array(buffer);
|
for (var i = 0; i < byteString.length; i++) {
|
view[i] = byteString.charCodeAt(i);
|
}
|
return buffer;
|
}
|
|
function decodeDataUri(dataUriRegexResult, responseType) {
|
responseType = when.defaultValue(responseType, '');
|
var mimeType = dataUriRegexResult[1];
|
var isBase64 = !!dataUriRegexResult[2];
|
var data = dataUriRegexResult[3];
|
|
switch (responseType) {
|
case '':
|
case 'text':
|
return decodeDataUriText(isBase64, data);
|
case 'arraybuffer':
|
return decodeDataUriArrayBuffer(isBase64, data);
|
case 'blob':
|
var buffer = decodeDataUriArrayBuffer(isBase64, data);
|
return new Blob([buffer], {
|
type : mimeType
|
});
|
case 'document':
|
var parser = new DOMParser();
|
return parser.parseFromString(decodeDataUriText(isBase64, data), mimeType);
|
case 'json':
|
return JSON.parse(decodeDataUriText(isBase64, data));
|
default:
|
//>>includeStart('debug', pragmas.debug);
|
throw new Check.DeveloperError('Unhandled responseType: ' + responseType);
|
//>>includeEnd('debug');
|
}
|
}
|
|
/**
|
* Asynchronously loads the given resource. Returns a promise that will resolve to
|
* the result once loaded, or reject if the resource failed to load. The data is loaded
|
* using XMLHttpRequest, which means that in order to make requests to another origin,
|
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled. It's recommended that you use
|
* the more specific functions eg. fetchJson, fetchBlob, etc.
|
*
|
* @param {Object} [options] Object with the following properties:
|
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
|
* @param {Object} [options.headers] Additional HTTP headers to send with the request, if any.
|
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
|
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*
|
*
|
* @example
|
* resource.fetch()
|
* .then(function(body) {
|
* // use the data
|
* }).otherwise(function(error) {
|
* // an error occurred
|
* });
|
*
|
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
|
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
|
*/
|
Resource.prototype.fetch = function(options) {
|
options = defaultClone(options, {});
|
options.method = 'GET';
|
|
return this._makeRequest(options);
|
};
|
|
/**
|
* Creates a Resource from a URL and calls fetch() on it.
|
*
|
* @param {String|Object} options A url or an object with the following properties
|
* @param {String} options.url The url of the resource.
|
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
|
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
|
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
|
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
|
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
|
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
|
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
|
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
|
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
|
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*/
|
Resource.fetch = function (options) {
|
var resource = new Resource(options);
|
return resource.fetch({
|
// Make copy of just the needed fields because headers can be passed to both the constructor and to fetch
|
responseType: options.responseType,
|
overrideMimeType: options.overrideMimeType
|
});
|
};
|
|
/**
|
* Asynchronously deletes the given resource. Returns a promise that will resolve to
|
* the result once loaded, or reject if the resource failed to load. The data is loaded
|
* using XMLHttpRequest, which means that in order to make requests to another origin,
|
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled.
|
*
|
* @param {Object} [options] Object with the following properties:
|
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
|
* @param {Object} [options.headers] Additional HTTP headers to send with the request, if any.
|
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
|
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*
|
*
|
* @example
|
* resource.delete()
|
* .then(function(body) {
|
* // use the data
|
* }).otherwise(function(error) {
|
* // an error occurred
|
* });
|
*
|
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
|
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
|
*/
|
Resource.prototype.delete = function(options) {
|
options = defaultClone(options, {});
|
options.method = 'DELETE';
|
|
return this._makeRequest(options);
|
};
|
|
/**
|
* Creates a Resource from a URL and calls delete() on it.
|
*
|
* @param {String|Object} options A url or an object with the following properties
|
* @param {String} options.url The url of the resource.
|
* @param {Object} [options.data] Data that is posted with the resource.
|
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
|
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
|
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
|
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
|
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
|
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
|
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
|
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
|
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
|
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*/
|
Resource.delete = function (options) {
|
var resource = new Resource(options);
|
return resource.delete({
|
// Make copy of just the needed fields because headers can be passed to both the constructor and to fetch
|
responseType: options.responseType,
|
overrideMimeType: options.overrideMimeType,
|
data: options.data
|
});
|
};
|
|
/**
|
* Asynchronously gets headers the given resource. Returns a promise that will resolve to
|
* the result once loaded, or reject if the resource failed to load. The data is loaded
|
* using XMLHttpRequest, which means that in order to make requests to another origin,
|
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled.
|
*
|
* @param {Object} [options] Object with the following properties:
|
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
|
* @param {Object} [options.headers] Additional HTTP headers to send with the request, if any.
|
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
|
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*
|
*
|
* @example
|
* resource.head()
|
* .then(function(headers) {
|
* // use the data
|
* }).otherwise(function(error) {
|
* // an error occurred
|
* });
|
*
|
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
|
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
|
*/
|
Resource.prototype.head = function(options) {
|
options = defaultClone(options, {});
|
options.method = 'HEAD';
|
|
return this._makeRequest(options);
|
};
|
|
/**
|
* Creates a Resource from a URL and calls head() on it.
|
*
|
* @param {String|Object} options A url or an object with the following properties
|
* @param {String} options.url The url of the resource.
|
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
|
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
|
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
|
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
|
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
|
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
|
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
|
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
|
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
|
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*/
|
Resource.head = function (options) {
|
var resource = new Resource(options);
|
return resource.head({
|
// Make copy of just the needed fields because headers can be passed to both the constructor and to fetch
|
responseType: options.responseType,
|
overrideMimeType: options.overrideMimeType
|
});
|
};
|
|
/**
|
* Asynchronously gets options the given resource. Returns a promise that will resolve to
|
* the result once loaded, or reject if the resource failed to load. The data is loaded
|
* using XMLHttpRequest, which means that in order to make requests to another origin,
|
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled.
|
*
|
* @param {Object} [options] Object with the following properties:
|
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
|
* @param {Object} [options.headers] Additional HTTP headers to send with the request, if any.
|
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
|
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*
|
*
|
* @example
|
* resource.options()
|
* .then(function(headers) {
|
* // use the data
|
* }).otherwise(function(error) {
|
* // an error occurred
|
* });
|
*
|
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
|
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
|
*/
|
Resource.prototype.options = function(options) {
|
options = defaultClone(options, {});
|
options.method = 'OPTIONS';
|
|
return this._makeRequest(options);
|
};
|
|
/**
|
* Creates a Resource from a URL and calls options() on it.
|
*
|
* @param {String|Object} options A url or an object with the following properties
|
* @param {String} options.url The url of the resource.
|
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
|
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
|
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
|
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
|
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
|
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
|
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
|
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
|
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
|
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*/
|
Resource.options = function (options) {
|
var resource = new Resource(options);
|
return resource.options({
|
// Make copy of just the needed fields because headers can be passed to both the constructor and to fetch
|
responseType: options.responseType,
|
overrideMimeType: options.overrideMimeType
|
});
|
};
|
|
/**
|
* Asynchronously posts data to the given resource. Returns a promise that will resolve to
|
* the result once loaded, or reject if the resource failed to load. The data is loaded
|
* using XMLHttpRequest, which means that in order to make requests to another origin,
|
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled.
|
*
|
* @param {Object} data Data that is posted with the resource.
|
* @param {Object} [options] Object with the following properties:
|
* @param {Object} [options.data] Data that is posted with the resource.
|
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
|
* @param {Object} [options.headers] Additional HTTP headers to send with the request, if any.
|
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
|
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*
|
*
|
* @example
|
* resource.post(data)
|
* .then(function(result) {
|
* // use the result
|
* }).otherwise(function(error) {
|
* // an error occurred
|
* });
|
*
|
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
|
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
|
*/
|
Resource.prototype.post = function(data, options) {
|
Check.Check.defined('data', data);
|
|
options = defaultClone(options, {});
|
options.method = 'POST';
|
options.data = data;
|
|
return this._makeRequest(options);
|
};
|
|
/**
|
* Creates a Resource from a URL and calls post() on it.
|
*
|
* @param {Object} options A url or an object with the following properties
|
* @param {String} options.url The url of the resource.
|
* @param {Object} options.data Data that is posted with the resource.
|
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
|
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
|
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
|
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
|
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
|
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
|
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
|
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
|
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
|
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*/
|
Resource.post = function (options) {
|
var resource = new Resource(options);
|
return resource.post(options.data, {
|
// Make copy of just the needed fields because headers can be passed to both the constructor and to post
|
responseType: options.responseType,
|
overrideMimeType: options.overrideMimeType
|
});
|
};
|
|
/**
|
* Asynchronously puts data to the given resource. Returns a promise that will resolve to
|
* the result once loaded, or reject if the resource failed to load. The data is loaded
|
* using XMLHttpRequest, which means that in order to make requests to another origin,
|
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled.
|
*
|
* @param {Object} data Data that is posted with the resource.
|
* @param {Object} [options] Object with the following properties:
|
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
|
* @param {Object} [options.headers] Additional HTTP headers to send with the request, if any.
|
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
|
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*
|
*
|
* @example
|
* resource.put(data)
|
* .then(function(result) {
|
* // use the result
|
* }).otherwise(function(error) {
|
* // an error occurred
|
* });
|
*
|
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
|
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
|
*/
|
Resource.prototype.put = function(data, options) {
|
Check.Check.defined('data', data);
|
|
options = defaultClone(options, {});
|
options.method = 'PUT';
|
options.data = data;
|
|
return this._makeRequest(options);
|
};
|
|
/**
|
* Creates a Resource from a URL and calls put() on it.
|
*
|
* @param {Object} options A url or an object with the following properties
|
* @param {String} options.url The url of the resource.
|
* @param {Object} options.data Data that is posted with the resource.
|
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
|
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
|
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
|
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
|
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
|
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
|
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
|
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
|
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
|
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*/
|
Resource.put = function (options) {
|
var resource = new Resource(options);
|
return resource.put(options.data, {
|
// Make copy of just the needed fields because headers can be passed to both the constructor and to post
|
responseType: options.responseType,
|
overrideMimeType: options.overrideMimeType
|
});
|
};
|
|
/**
|
* Asynchronously patches data to the given resource. Returns a promise that will resolve to
|
* the result once loaded, or reject if the resource failed to load. The data is loaded
|
* using XMLHttpRequest, which means that in order to make requests to another origin,
|
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled.
|
*
|
* @param {Object} data Data that is posted with the resource.
|
* @param {Object} [options] Object with the following properties:
|
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
|
* @param {Object} [options.headers] Additional HTTP headers to send with the request, if any.
|
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
|
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*
|
*
|
* @example
|
* resource.patch(data)
|
* .then(function(result) {
|
* // use the result
|
* }).otherwise(function(error) {
|
* // an error occurred
|
* });
|
*
|
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
|
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
|
*/
|
Resource.prototype.patch = function(data, options) {
|
Check.Check.defined('data', data);
|
|
options = defaultClone(options, {});
|
options.method = 'PATCH';
|
options.data = data;
|
|
return this._makeRequest(options);
|
};
|
|
/**
|
* Creates a Resource from a URL and calls patch() on it.
|
*
|
* @param {Object} options A url or an object with the following properties
|
* @param {String} options.url The url of the resource.
|
* @param {Object} options.data Data that is posted with the resource.
|
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
|
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
|
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
|
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
|
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
|
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
|
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
|
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
|
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
|
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
|
*/
|
Resource.patch = function (options) {
|
var resource = new Resource(options);
|
return resource.patch(options.data, {
|
// Make copy of just the needed fields because headers can be passed to both the constructor and to post
|
responseType: options.responseType,
|
overrideMimeType: options.overrideMimeType
|
});
|
};
|
|
/**
|
* Contains implementations of functions that can be replaced for testing
|
*
|
* @private
|
*/
|
Resource._Implementations = {};
|
|
function loadImageElement(url, crossOrigin, deferred) {
|
var image = new Image();
|
|
image.onload = function() {
|
deferred.resolve(image);
|
};
|
|
image.onerror = function(e) {
|
deferred.reject(e);
|
};
|
|
if (crossOrigin) {
|
if (TrustedServers.contains(url)) {
|
image.crossOrigin = 'use-credentials';
|
} else {
|
image.crossOrigin = '';
|
}
|
}
|
|
image.src = url;
|
}
|
|
Resource._Implementations.createImage = function(request, crossOrigin, deferred, flipY, preferImageBitmap) {
|
var url = request.url;
|
// Passing an Image to createImageBitmap will force it to run on the main thread
|
// since DOM elements don't exist on workers. We convert it to a blob so it's non-blocking.
|
// See:
|
// https://bugzilla.mozilla.org/show_bug.cgi?id=1044102#c38
|
// https://bugs.chromium.org/p/chromium/issues/detail?id=580202#c10
|
Resource.supportsImageBitmapOptions()
|
.then(function(supportsImageBitmap) {
|
// We can only use ImageBitmap if we can flip on decode.
|
// See: https://github.com/CesiumGS/cesium/pull/7579#issuecomment-466146898
|
if (!(supportsImageBitmap && preferImageBitmap)) {
|
loadImageElement(url, crossOrigin, deferred);
|
return;
|
}
|
var responseType = 'blob';
|
var method = 'GET';
|
var xhrDeferred = when.when.defer();
|
var xhr = Resource._Implementations.loadWithXhr(
|
url,
|
responseType,
|
method,
|
undefined,
|
undefined,
|
xhrDeferred,
|
undefined,
|
undefined,
|
undefined
|
);
|
|
if (when.defined(xhr) && when.defined(xhr.abort)) {
|
request.cancelFunction = function() {
|
xhr.abort();
|
};
|
}
|
return xhrDeferred.promise.then(function(blob) {
|
if (!when.defined(blob)) {
|
deferred.reject(new RuntimeError.RuntimeError('Successfully retrieved ' + url + ' but it contained no content.'));
|
return;
|
}
|
|
return Resource.createImageBitmapFromBlob(blob, {
|
flipY: flipY,
|
premultiplyAlpha: false
|
});
|
}).then(deferred.resolve);
|
})
|
.otherwise(deferred.reject);
|
};
|
|
/**
|
* Wrapper for createImageBitmap
|
*
|
* @private
|
*/
|
Resource.createImageBitmapFromBlob = function(blob, options) {
|
Check.Check.defined('options', options);
|
Check.Check.typeOf.bool('options.flipY', options.flipY);
|
Check.Check.typeOf.bool('options.premultiplyAlpha', options.premultiplyAlpha);
|
|
return createImageBitmap(blob, {
|
imageOrientation: options.flipY ? 'flipY' : 'none',
|
premultiplyAlpha: options.premultiplyAlpha ? 'premultiply' : 'none'
|
});
|
};
|
|
function decodeResponse(loadWithHttpResponse, responseType) {
|
switch (responseType) {
|
case 'text':
|
return loadWithHttpResponse.toString('utf8');
|
case 'json':
|
return JSON.parse(loadWithHttpResponse.toString('utf8'));
|
default:
|
return new Uint8Array(loadWithHttpResponse).buffer;
|
}
|
}
|
|
function loadWithHttpRequest(url, responseType, method, data, headers, deferred, overrideMimeType) {
|
// Note: only the 'json' and 'text' responseTypes transforms the loaded buffer
|
var URL = require('url').parse(url); // eslint-disable-line
|
var http = URL.protocol === 'https:' ? require('https') : require('http'); // eslint-disable-line
|
var zlib = require('zlib'); // eslint-disable-line
|
var options = {
|
protocol : URL.protocol,
|
hostname : URL.hostname,
|
port : URL.port,
|
path : URL.path,
|
query : URL.query,
|
method : method,
|
headers : headers
|
};
|
|
http.request(options)
|
.on('response', function(res) {
|
if (res.statusCode < 200 || res.statusCode >= 300) {
|
deferred.reject(new RequestErrorEvent(res.statusCode, res, res.headers));
|
return;
|
}
|
|
var chunkArray = [];
|
res.on('data', function(chunk) {
|
chunkArray.push(chunk);
|
});
|
|
res.on('end', function() {
|
var result = Buffer.concat(chunkArray); // eslint-disable-line
|
if (res.headers['content-encoding'] === 'gzip') {
|
zlib.gunzip(result, function(error, resultUnzipped) {
|
if (error) {
|
deferred.reject(new RuntimeError.RuntimeError('Error decompressing response.'));
|
} else {
|
deferred.resolve(decodeResponse(resultUnzipped, responseType));
|
}
|
});
|
} else {
|
deferred.resolve(decodeResponse(result, responseType));
|
}
|
});
|
}).on('error', function(e) {
|
deferred.reject(new RequestErrorEvent());
|
}).end();
|
}
|
|
var noXMLHttpRequest = typeof XMLHttpRequest === 'undefined';
|
Resource._Implementations.loadWithXhr = function(url, responseType, method, data, headers, deferred, overrideMimeType) {
|
var dataUriRegexResult = dataUriRegex$1.exec(url);
|
if (dataUriRegexResult !== null) {
|
deferred.resolve(decodeDataUri(dataUriRegexResult, responseType));
|
return;
|
}
|
|
if (noXMLHttpRequest) {
|
loadWithHttpRequest(url, responseType, method, data, headers, deferred);
|
return;
|
}
|
|
var xhr = new XMLHttpRequest();
|
|
if (TrustedServers.contains(url)) {
|
xhr.withCredentials = true;
|
}
|
|
url = url.replace(/{/g, '%7B').replace(/}/g, '%7D');
|
xhr.open(method, url, true);
|
|
if (when.defined(overrideMimeType) && when.defined(xhr.overrideMimeType)) {
|
xhr.overrideMimeType(overrideMimeType);
|
}
|
|
if (when.defined(headers)) {
|
for (var key in headers) {
|
if (headers.hasOwnProperty(key)) {
|
xhr.setRequestHeader(key, headers[key]);
|
}
|
}
|
}
|
|
if (when.defined(responseType)) {
|
xhr.responseType = responseType;
|
}
|
|
// While non-standard, file protocol always returns a status of 0 on success
|
var localFile = false;
|
if (typeof url === 'string') {
|
localFile = (url.indexOf('file://') === 0) || (typeof window !== 'undefined' && window.location.origin === 'file://');
|
}
|
|
xhr.onload = function() {
|
if ((xhr.status < 200 || xhr.status >= 300) && !(localFile && xhr.status === 0)) {
|
deferred.reject(new RequestErrorEvent(xhr.status, xhr.response, xhr.getAllResponseHeaders()));
|
return;
|
}
|
|
var response = xhr.response;
|
var browserResponseType = xhr.responseType;
|
|
if (method === 'HEAD' || method === 'OPTIONS') {
|
var responseHeaderString = xhr.getAllResponseHeaders();
|
var splitHeaders = responseHeaderString.trim().split(/[\r\n]+/);
|
|
var responseHeaders = {};
|
splitHeaders.forEach(function (line) {
|
var parts = line.split(': ');
|
var header = parts.shift();
|
responseHeaders[header] = parts.join(': ');
|
});
|
|
deferred.resolve(responseHeaders);
|
return;
|
}
|
|
//All modern browsers will go into either the first or second if block or last else block.
|
//Other code paths support older browsers that either do not support the supplied responseType
|
//or do not support the xhr.response property.
|
if (xhr.status === 204) {
|
// accept no content
|
deferred.resolve();
|
} else if (when.defined(response) && (!when.defined(responseType) || (browserResponseType === responseType))) {
|
deferred.resolve(response);
|
} else if ((responseType === 'json') && typeof response === 'string') {
|
try {
|
deferred.resolve(JSON.parse(response));
|
} catch (e) {
|
deferred.reject(e);
|
}
|
} else if ((browserResponseType === '' || browserResponseType === 'document') && when.defined(xhr.responseXML) && xhr.responseXML.hasChildNodes()) {
|
deferred.resolve(xhr.responseXML);
|
} else if ((browserResponseType === '' || browserResponseType === 'text') && when.defined(xhr.responseText)) {
|
deferred.resolve(xhr.responseText);
|
} else {
|
deferred.reject(new RuntimeError.RuntimeError('Invalid XMLHttpRequest response type.'));
|
}
|
};
|
|
xhr.onerror = function(e) {
|
deferred.reject(new RequestErrorEvent());
|
};
|
|
xhr.send(data);
|
|
return xhr;
|
};
|
|
Resource._Implementations.loadAndExecuteScript = function(url, functionName, deferred) {
|
return loadAndExecuteScript(url).otherwise(deferred.reject);
|
};
|
|
/**
|
* The default implementations
|
*
|
* @private
|
*/
|
Resource._DefaultImplementations = {};
|
Resource._DefaultImplementations.createImage = Resource._Implementations.createImage;
|
Resource._DefaultImplementations.loadWithXhr = Resource._Implementations.loadWithXhr;
|
Resource._DefaultImplementations.loadAndExecuteScript = Resource._Implementations.loadAndExecuteScript;
|
|
/**
|
* A resource instance initialized to the current browser location
|
*
|
* @type {Resource}
|
* @constant
|
*/
|
Resource.DEFAULT = Object.freeze(new Resource({
|
url: (typeof document === 'undefined') ? '' : document.location.href.split('?')[0]
|
}));
|
|
/*global CESIUM_BASE_URL*/
|
|
var cesiumScriptRegex = /((?:.*\/)|^)Cesium\.js$/;
|
function getBaseUrlFromCesiumScript() {
|
var scripts = document.getElementsByTagName('script');
|
for ( var i = 0, len = scripts.length; i < len; ++i) {
|
var src = scripts[i].getAttribute('src');
|
var result = cesiumScriptRegex.exec(src);
|
if (result !== null) {
|
return result[1];
|
}
|
}
|
return undefined;
|
}
|
|
var a$1;
|
function tryMakeAbsolute(url) {
|
if (typeof document === 'undefined') {
|
//Node.js and Web Workers. In both cases, the URL will already be absolute.
|
return url;
|
}
|
|
if (!when.defined(a$1)) {
|
a$1 = document.createElement('a');
|
}
|
a$1.href = url;
|
|
// IE only absolutizes href on get, not set
|
a$1.href = a$1.href; // eslint-disable-line no-self-assign
|
return a$1.href;
|
}
|
|
var baseResource;
|
function getCesiumBaseUrl() {
|
if (when.defined(baseResource)) {
|
return baseResource;
|
}
|
|
var baseUrlString;
|
if (typeof CESIUM_BASE_URL !== 'undefined') {
|
baseUrlString = CESIUM_BASE_URL;
|
} else if (typeof define === 'object' && when.defined(define.amd) && !define.amd.toUrlUndefined && when.defined(require.toUrl)) {
|
baseUrlString = getAbsoluteUri('..', buildModuleUrl('Core/buildModuleUrl.js'));
|
} else {
|
baseUrlString = getBaseUrlFromCesiumScript();
|
}
|
|
//>>includeStart('debug', pragmas.debug);
|
if (!when.defined(baseUrlString)) {
|
throw new Check.DeveloperError('Unable to determine Cesium base URL automatically, try defining a global variable called CESIUM_BASE_URL.');
|
}
|
//>>includeEnd('debug');
|
|
baseResource = new Resource({
|
url: tryMakeAbsolute(baseUrlString)
|
});
|
baseResource.appendForwardSlash();
|
|
return baseResource;
|
}
|
|
function buildModuleUrlFromRequireToUrl(moduleID) {
|
//moduleID will be non-relative, so require it relative to this module, in Core.
|
return tryMakeAbsolute(require.toUrl('../' + moduleID));
|
}
|
|
function buildModuleUrlFromBaseUrl(moduleID) {
|
var resource = getCesiumBaseUrl().getDerivedResource({
|
url: moduleID
|
});
|
return resource.url;
|
}
|
|
var implementation;
|
|
/**
|
* Given a non-relative moduleID, returns an absolute URL to the file represented by that module ID,
|
* using, in order of preference, require.toUrl, the value of a global CESIUM_BASE_URL, or
|
* the base URL of the Cesium.js script.
|
*
|
* @private
|
*/
|
function buildModuleUrl(moduleID) {
|
if (!when.defined(implementation)) {
|
//select implementation
|
if (typeof define === 'object' && when.defined(define.amd) && !define.amd.toUrlUndefined && when.defined(require.toUrl)) {
|
implementation = buildModuleUrlFromRequireToUrl;
|
} else {
|
implementation = buildModuleUrlFromBaseUrl;
|
}
|
}
|
|
var url = implementation(moduleID);
|
return url;
|
}
|
|
// exposed for testing
|
buildModuleUrl._cesiumScriptRegex = cesiumScriptRegex;
|
buildModuleUrl._buildModuleUrlFromBaseUrl = buildModuleUrlFromBaseUrl;
|
buildModuleUrl._clearBaseResource = function() {
|
baseResource = undefined;
|
};
|
|
/**
|
* Sets the base URL for resolving modules.
|
* @param {String} value The new base URL.
|
*/
|
buildModuleUrl.setBaseUrl = function(value) {
|
baseResource = Resource.DEFAULT.getDerivedResource({
|
url: value
|
});
|
};
|
|
/**
|
* Gets the base URL for resolving modules.
|
*/
|
buildModuleUrl.getCesiumBaseUrl = getCesiumBaseUrl;
|
|
exports.Resource = Resource;
|
exports.buildModuleUrl = buildModuleUrl;
|
exports.deprecationWarning = deprecationWarning;
|
exports.oneTimeWarning = oneTimeWarning;
|
|
});
|
