/*
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* Copyright (c) 2018-2028, Chill Zhuang All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* Neither the name of the dreamlu.net developer nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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* Author: Chill 庄骞 (smallchill@163.com)
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*/
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package org.springblade.gateway.handler;
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import org.springblade.gateway.provider.ResponseProvider;
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import org.springframework.boot.autoconfigure.web.ErrorProperties;
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import org.springframework.boot.autoconfigure.web.ResourceProperties;
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import org.springframework.boot.autoconfigure.web.reactive.error.DefaultErrorWebExceptionHandler;
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import org.springframework.boot.web.reactive.error.ErrorAttributes;
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import org.springframework.cloud.gateway.support.NotFoundException;
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import org.springframework.context.ApplicationContext;
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import org.springframework.web.reactive.function.server.*;
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import org.springframework.web.server.ResponseStatusException;
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import java.util.Map;
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/**
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* 异常处理
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*
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* @author Chill
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*/
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public class ErrorExceptionHandler extends DefaultErrorWebExceptionHandler {
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public ErrorExceptionHandler(ErrorAttributes errorAttributes, ResourceProperties resourceProperties,
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ErrorProperties errorProperties, ApplicationContext applicationContext) {
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super(errorAttributes, resourceProperties, errorProperties, applicationContext);
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}
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/**
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* 获取异常属性
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*/
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@Override
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protected Map<String, Object> getErrorAttributes(ServerRequest request, boolean includeStackTrace) {
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int code = 500;
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Throwable error = super.getError(request);
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if (error instanceof NotFoundException) {
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code = 404;
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}
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if (error instanceof ResponseStatusException) {
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code = ((ResponseStatusException) error).getStatus().value();
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}
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return ResponseProvider.response(code, this.buildMessage(request, error));
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}
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/**
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* 指定响应处理方法为JSON处理的方法
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*
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* @param errorAttributes
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*/
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@Override
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protected RouterFunction<ServerResponse> getRoutingFunction(ErrorAttributes errorAttributes) {
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return RouterFunctions.route(RequestPredicates.all(), this::renderErrorResponse);
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}
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/**
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* 根据code获取对应的HttpStatus
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*
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* @param errorAttributes
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*/
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@Override
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protected int getHttpStatus(Map<String, Object> errorAttributes) {
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return (int) errorAttributes.get("code");
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}
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/**
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* 构建异常信息
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*
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* @param request
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* @param ex
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* @return
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*/
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private String buildMessage(ServerRequest request, Throwable ex) {
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StringBuilder message = new StringBuilder("Failed to handle request [");
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message.append(request.methodName());
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message.append(" ");
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message.append(request.uri());
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message.append("]");
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if (ex != null) {
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message.append(": ");
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message.append(ex.getMessage());
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}
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return message.toString();
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}
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}
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