C套接字，代理GET请求返回404

Question

I'm creating a simple proxy server and I've run into an issue with getting responses back from a website.

I've set up my server to accept connections on a specified port that gets connected to through the browser proxy config. The server is able to receive the request, connect to the specified website, send the request, and receive a reply.

I'm forwarding the request from the browser to the website without modification, but the replies I receive are always 404 errors.

This is the request I'm fowarding to the website, there is a \\r\\n after every line and \\r\\n\\r\\n after the final line.

GET http://www.mywebpage.com/ HTTP/1.1
Host: www.mywebpage.com
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:66.0) Gecko/20100101 Firefox/66.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive
Cookie: __utma=1.35811746.1525489860.1537250282.1539467023.3; __utmz=1.1537250282.2.2.utmcsr=google|utmccn=(organic)|utmcmd=organic|utmctr=(not%20provided); _fbp=fb.1.1553849756364.1600689742
Upgrade-Insecure-Requests: 1

My send receive code looks like this.

sendError  = send(serverSock, requestString , strlen(requestString) , 0 );  
returnedSize = recv(serverSock, buffer, sizeof(buffer), 0);

Answer 1

I'm forwarding the request from the browser to the website without modification ...

 GET http://www.mywebpage.com/ HTTP/1.1 

The absolute URL you use in your request target should only be used for proxies. Normal servers expect the origin form , ie only the path and optional query but not the full URL. Method, host and port should thus be stripped:

 GET / HTTP/1.1