由于 CORS 错误，POST 请求在反应 axios 中被阻止 [英] POST request blocked in react axios due to CORS error

问题描述

我正在尝试向包含多部分数据的 API 发送 POST 请求.

I am trying to send a POST request to an API with multipart data.

我在 postman 中测试了 API，在 Postman 中一切正常.但是当我在 React 中调用 API 时，它给了我 CORS 错误.

I test the API in postman and everything works fine in Postman. But when I call the API in react, it gives me CORS error.

我交叉检查了 URL、标题和数据，对我来说似乎一切正常.我对同一主题进行了多个 Stack Overflow 问题，发现我需要将 allow-cross-origin 与标头一起传递.我在标题中添加了它，但无法解决我的问题.

I cross-checked the URL, Header, and Data, all seems OK for me. I go through multiple Stack Overflow question on the same topic and found that I need to pass allow-cross-origin along with the header. I added that in my header but didn't able to solve my problem.

我在控制台中得到的错误是:

The error which I got in the console is:

请求的资源上不存在Access-Control-Allow-Origin"标头

API 调用代码

import axios from 'axios';

const header = {
    "userid":localStorage.getItem("userid"),
    "token":localStorage.getItem("token"),
    "Content-Type": "multipart/form-data",
    "Access-Control-Allow-Origin": "*"
  }

const URL="https://api.hello.com/dashboard/venue_updated";

export function updateVenue(data,name,venue_type,email, phone_no,callback, errorcallback){
    console.log(header);
    axios.post(URL,data,{
        params:{
            name,
            venue_type,
            email,
             phone_no,
        },
        headers:header
    })
    .then(res => {
      if(callback != null){
         callback(res);
      }
    })
    .catch(err => {
      if(errorcallback != null){
         errorcallback(err);
      }
    })
}

我曾经在我的组件中导入它并在 form-submit 方法上调用它.

I used to import this in my component and call it on the form-submit method.

推荐答案

在 React 中使用该标头的 axios 调用无法解决 CORS.服务器的响应必须有 "Access-Control-Allow-Origin": "*"

axios call with that header in React doesn't solve CORS. Server's response must have "Access-Control-Allow-Origin": "*"

检查网络选项卡并查看服务器的响应.

check network tabs and see server's response.

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