为什么node.js，http-server，显示有两个请求来了? [英] Why does node.js, http-server, show that there are two request coming?

问题描述

我使用 node.js 进行了以下简单的 http 服务器设置:

I have the following simple http-server setup using node.js:

var http = require('http');
var port = 12311

http.createServer(function (req, res) {

    console.log("Incomming request from " + req.connection.remoteAddress);

    res.writeHead(200, { 'Content-Type': 'text/plain' });
    res.end("test string");


}).listen(port);
console.log("Listening on " +  port);

如您所见，当请求进来时，我将其记录到控制台.现在，当我浏览到 localhost:12311 时，控制台显示有两个连接:

As you can see, when a request comes in, I log it to the console. Now when I browse to localhost:12311 the console shows that two connections have come in:

"E:\Program Files\nodejs\node.exe" hello-world-server.js
Listening on 12311
Incomming request from 127.0.0.1
Incomming request from 127.0.0.1

这是为什么?

推荐答案

通常是对 favicon.ico 的请求.即使你没有，如果你没有在标题中设置相关的 <link rel="shortcut icon"... ，它也会被请求，因为规范定义了一个默认的文件路径.

It's usually the request for the favicon.ico. Even if you don't have one, it's requested as the norm defines a default file path if you don't set the relevant <link rel="shortcut icon"... in the header.

查找请求的最佳方法是:

The best ways to find about the requests are :

• 客户端，打开开发者工具并查看网络标签.
• 服务器端，通过记录req.url

• client side, by opening the developer tools and looking at the network tab.
• server side, by logging req.url

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