'use strict';
|
var jsonp = require('./jsonp');
|
var Promise = require('lie');
|
|
module.exports = function (url, options) {
|
options = options || {};
|
if (options.jsonp) {
|
return jsonp(url, options);
|
}
|
var request;
|
var cancel;
|
var out = new Promise(function (resolve, reject) {
|
cancel = reject;
|
if (global.XMLHttpRequest === undefined) {
|
reject('XMLHttpRequest is not supported');
|
}
|
var response;
|
request = new global.XMLHttpRequest();
|
request.open('GET', url);
|
if (options.headers) {
|
Object.keys(options.headers).forEach(function (key) {
|
request.setRequestHeader(key, options.headers[key]);
|
});
|
}
|
request.onreadystatechange = function () {
|
if (request.readyState === 4) {
|
if ((request.status < 400 && options.local) || request.status === 200) {
|
if (global.JSON) {
|
response = JSON.parse(request.responseText);
|
} else {
|
reject(new Error('JSON is not supported'));
|
}
|
resolve(response);
|
} else {
|
if (!request.status) {
|
reject('Attempted cross origin request without CORS enabled');
|
} else {
|
reject(request.statusText);
|
}
|
}
|
}
|
};
|
request.send();
|
});
|
out.catch(function (reason) {
|
request.abort();
|
return reason;
|
});
|
out.abort = cancel;
|
return out;
|
};
|
