Python：运行 HTTP 代理服务器时如何获取 URL？

发布于 2025-01-11 04:01:10 字数 967 浏览 0 评论 0原文

我正在创建一个 HTTP 代理服务器，它能够检索用户请求的网站的 URL。我的 HTTP 代理服务器只能使用单个文件（我不能有多个文件）。

我能够在无限运行的 while 循环中检测连接和地址并接收来自客户端的消息：

while True:
    conn, addr = created_socket.accept()
    data_received = conn.recv(1024)
    print(data_received)

当我在指定端口上运行服务器并在 Chrome 中输入 [IP 地址]:[端口号] 时，我得到打印 data_received 后的结果如下：

b'GET /www.google.com HTTP/1.1\r\nHost: 192.168.1.2:5050\r\nConnection: keep-alive\r\n升级不安全请求：1\r\n用户代理：Mozilla/5.0（Windows NT 10.0；Win64；x64）AppleWebKit/537.36（KHTML，如 Gecko）Chrome/98.0.4758.102 Safari/537.36\ r\n接受:文本/html，应用程序/xhtml+xml，应用程序/xml；q=0.9，图像/avif，图像/webp，图像/apng，*/*；q=0.8，应用程序/签名交换；v=b3；q= 0.9\r\nAccept-Encoding: gzip, deflate\r\nAccept-Language: en-US,en;q=0.9\r\n\r\n

有没有系统的方法我可以检索哪个 URL（在本例中为 www.google.com）？现在，我正在为 conn.recv (1024) 的恒定缓冲区大小进行编码。但是，我想知道是否有一种方法可以首先检索客户端的消息大小，将其存储在变量中，然后将该变量传递给 recv 的缓冲区大小参数？

原文

I am creating an HTTP Proxy Server that is able to retrieve the URL of the website requested by a user. I am only allowed to use a single file for my HTTP Proxy Server (I can't have multiple files).

I am able within a infinite running while loop to detect a connection and the address and receive a message from the client:

while True:
    conn, addr = created_socket.accept()
    data_received = conn.recv(1024)
    print(data_received)

When I run my server on a specified port and type the [IP Address]:[Port Number] into Chrome, I get the following result after printing data_received:

b'GET /www.google.com HTTP/1.1\r\nHost: 192.168.1.2:5050\r\nConnection: keep-alive\r\nUpgrade-Insecure-Requests: 1\r\nUser-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.102 Safari/537.36\r\nAccept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9\r\nAccept-Encoding: gzip, deflate\r\nAccept-Language: en-US,en;q=0.9\r\n\r\n

Is there a systematic way in which I can retrieve the URL (in this case, www.google.com)? Right now, I am coding in a constant buffer size for conn.recv (1024). However, I was wondering if there was first a way to first retrieve the message size of the client, store it in a variable, and then pass that variable to the buffer size parameter for recv?

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