客户端两次向服务器发送请求? [英] Client is sending request twice to server?

问题描述

我对服务器和节点非常陌生.我创建了一个非常基本的httpserver，并尝试在控制台上打印连接数.下面是相同的代码

I am very new to servers and node. I created a very basic httpserver and trying to print number of connection on console. Below is the code for the same

var count = 0;
var http = require("http");
var server = http.createServer(function(request,response){
    response.writeHead(200, {"Content-Type": "text/html"});
    count++;
    console.log('Count' + count);
    response.end(count + '');
});

server.listen(8080);
console.log("Server is listening");

三个连接的计数值增加到6之后.请让我知道为什么每个http请求的计数都增加2.

After three connection count value is incremented upto 6. Please let me know why there is a increment of 2 count for every http request

推荐答案

您的浏览器可能会请求其他URL，例如favicon.ico，许多浏览器都会这样做，以便找到一个可以显示为小图标的小图标.网站的表示形式.

Your browser is likely requesting other URLs such as a favicon.ico which is something many browsers will do in order to find a small icon that it can display as a representation of the site.

为此，您可以检查 request.url 以查找特定路径，并且仅在该路径是您期望的路径时才应用逻辑.

To defend against that, you can check request.url for a specific path and only apply your logic if the path is what you expect.

这是您可以做到这一点的一种方法:

Here's one way you could do that:

var count = 0;
var http = require("http");
var server = http.createServer(function(request,response){
    if (request.url === "/") {
        response.writeHead(200, {"Content-Type": "text/html"});
        count++;
        console.log('Count' + count);
        response.end(count + '');
    } else {
        response.writeHead(404, {"Content-Type": "text/html"});
        response.write("Content not found");
        response.end();
    }
});

server.listen(8080);
console.log("Server is listening");

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