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react spring 实现跨域 React+Spring实现跨域问题的完美解决办法

喝着啤酒写bug 人气:0

最近小编在学习react,在学习过程中遇到React+Spring实现跨域问题,下面小编记录了整个问题过程,给大家做个参考。

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。

总结

以上所述是小编给大家介绍的React+Spring实现跨域问题的完美解决方法,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对网站的支持!

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