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react+spring 记录跨域问题的解决方法

react 跨域访问后台,默认是有跨域问题,并且火弧和谷歌浏览器,对跨域问题展示还不一样.

谷歌浏览器如下图:

此处状态是200,然而在Response却没有任何信息,如下图

 

然而火弧浏览器,对该问题的描述,就清淅得多,

火弧浏览器告诉我们,跨域了,关于react跨域的帖子,网上也有相关帖子,搜索到的方法,大约都是如下解决方式:

如果你是通过creat-react-app构建的项目,请在package.json文件中的根目录下,添加"proxy": "http://api.xxxx.com",如果你的项目,需要调用多个不同ip的接口,请使用如下配置:

"proxy": { "/api/RoomApi": { "target": "http://open.douyucdn.cn", "changeOrigin":true }, "/api/v1":{ "target":"http://capi.douyucdn.cn", "changeOrigin":true } }

对于antd-pro的项目,需要在package.json的同等目录下添加.roadhogrc文件,具体代码如下:

{ "entry": "src/index.js", "extraBabelPlugins": [ "transform-runtime", "transform-decorators-legacy", "transform-class-properties", ["import", { "libraryName": "antd", "libraryDirectory": "es", "style": true }] ], "env": { "development": { "extraBabelPlugins": [ "dva-hmr" ] } }, "externals": { "g2": "G2", "g-cloud": "Cloud", "g2-plugin-slider": "G2.Plugin.slider" }, "ignoreMomentLocale": true, "theme": "./src/theme.js", "proxy": { "/api": { "target": "http://api.xxxx.com/", "changeOrigin": true } } }

配置完成后,再次访问接口,还是出现一样的跨域问题,既然recat的配置,未解决跨域问题,我就把思路转到spring,在spring去处理跨域,在后端程序添加一个拦截器,

package com.gg.interceptor;import java.util.ArrayList;import java.util.List;import java.util.Vector;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.web.servlet.HandlerInterceptor;import org.springframework.web.servlet.ModelAndView;public class ProcessInterceptor implements HandlerInterceptor{ @Override public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object handler) throws Exception { // TODO Auto-generated method stub // 指定白名单域名 http://localhost:8000,http://localhost:8000 List<String> whileList = new Vector<String>(); whileList.add("http://127.0.0.1:8000"); whileList.add("http://localhost:8000"); String clientIp = httpServletRequest.getHeader("origin"); boolean status = false; for(String ip : whileList) { if(clientIp!=null&&clientIp.equals(ip)) { status = true; break; } } /** * 网上解决方案是httpServletResponse.setHeader("Access-Control-Allow-Origin","*");设置后发现,还是不能处理跨域问题,需要指定某一个ip,如:http://127.0.0.1:8000 * */ httpServletResponse.setHeader("Access-Control-Allow-Origin",status?clientIp:null); //响应头设置 httpServletResponse.setHeader("Access-Control-Allow-Headers", "Content-Type,Content-Length, Authorization, Accept,X-Requested-With"); //响应类型 httpServletResponse.setHeader("Access-Control-Allow-Methods","PUT,POST,GET,DELETE,OPTIONS"); httpServletResponse.setHeader("X-Powered-By","Jetty"); httpServletResponse.setHeader("Access-Control-Allow-Credentials","true"); String method= httpServletRequest.getMethod(); if (method.equals("OPTIONS")){ httpServletResponse.setStatus(200); return false; } System.out.println(method+",status:"+status+",clientIp:"+clientIp); return true; } @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { // TODO Auto-generated method stub } @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { // TODO Auto-generated method stub }}

spring-servlet.xml配置如下:

<mvc:interceptors> <bean class="com.gg.interceptor.ProcessInterceptor"></bean> </mvc:interceptors>

react客户端代码如下:

Model层js代码:*login({ payload }, { call, put }){ let formData = new FormData(); formData.append("loginId",payload.loginId);//账号 formData.append("passWord",payload.passWord);//密码 const response = yield call(requestGuangGao, formData); yield put({ type: "changeLoginStatus", payload: response, }); },api层js代码:export async function requestGuangGao(formData){ // let formData = new FormData(); // formData.append("loginId",params.loginId); // formData.append("passWord",params.passWord); console.log("requestGua >url :" ); return request("http://127.0.0.1:8080/guanggao/userController/login.do", { method: "POST", mode: "cors", body:formData, }); }

通过以下设置,react跨域问题就处理好了。