CORS jQuery AJAX 请求 [英] CORS jQuery AJAX request

问题描述

我在处理 ajax 请求时遇到问题.我收到错误

I'm having troubles with an ajax request. I was getting the error

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

所以我尝试的是这个 jQuery ajax 请求:

So what I tried was this jQuery ajax request:

var request = $.ajax({
    type: 'GET',
    url: url,
    dataType: "json",
    xhrFields: {
        withCredentials: true
    }
});
request.done(function(data){
    console.log(data);
});    

但是还是不行.我仍然收到错误.

But it is still not working. I am still getting the error.

我应该如何解决这个问题?

How should I fix this?

推荐答案

很简单，你应该先设置服务器 http 响应头.问题不在于您的前端 JavaScript 代码.您需要返回此标头:

It's easy, you should set server http response header first. The problem is not with your front-end javascript code. You need to return this header:

Access-Control-Allow-Origin:*

或

Access-Control-Allow-Origin:your domain

在Apache配置文件中，代码是这样的:

Header set Access-Control-Allow-Origin "*"

在nodejs中，代码是这样的:

In nodejs,the code is like this:

res.setHeader('Access-Control-Allow-Origin','*');

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