代理不适用于反应和节点

问题描述

我设置的代理存在问题.

I'm having issues with the proxy I set up.

这是我的根package.json文件:

This is my root package.json file:

"scripts": {
    "client": "cd client && yarn dev-server",
    "server": "nodemon server.js",
    "dev": "concurrently --kill-others-on-fail \"yarn server\" \"yarn client\""
}

我的客户端package.json文件:

My client package.json file:

"scripts": {
    "serve": "live-server public/",
    "build": "webpack",
    "dev-server": "webpack-dev-server"
},
"proxy": "http://localhost:5000/"

我已经在服务器端设置了express以在端口5000上运行.每当我向服务器发出请求时，即:

I've set up express on my server side to run on port 5000. Whenever I make a request to the server, ie :

callApi = async () => {
    const response = await fetch('/api/hello');
    const body = await response.json();
    // ... more stuff
}

请求始终发送到

有人可以指出要解决此问题以便将请求实际发送到端口5000的情况吗?

Can someone point out what i have to do to fix this issue so that the request actually goes to port 5000?

推荐答案

是否正在从http://localhost:8080加载您的客户端?

Is your client being loaded from http://localhost:8080?

默认情况下，在不使用绝对URL的情况下使用fetch api时，它将镜像客户端页面的主机(即主机名和端口).因此，从运行在http://localhost:8080的页面调用fetch('/api/hello');将导致fetch api推断您希望将请求发送到http://localhost:8080/api/hello的绝对URL.

By default the fetch api, when used without an absolute URL, will mirror the host of the client page (that is, the hostname and port). So calling fetch('/api/hello'); from a page running at http://localhost:8080 will cause the fetch api to infer that you want the request to be made to the absolute url of http://localhost:8080/api/hello.

如果要这样更改端口，则需要指定一个绝对URL.在您的情况下为fetch('http://localhost:5000/api/hello');，尽管您可能希望动态构建它，因为最终您将不会在localhost上运行以进行生产.

You will need to specify an absolute URL if you want to change the port like that. In your case that would be fetch('http://localhost:5000/api/hello');, although you probably want to dynamically build it since eventually you won't be running on localhost for production.

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