react+spring 记录跨域问题的解决方法
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 } }
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,
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 } }
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。
dependencies
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