HTTP CONNECT processing on the proxy server

Hello!

I write my proxy server in C++. I studied all the man's and standards. I implemented support for absolutely all request methods that the HTTP protocol implies from GET to DELETE, and now I'm faced with the problem of processing the CONNECT method. I absolutely can't understand how to properly process it and forward it between the client and the server. If everything is simple with HTTP requests, a request of this type has arrived:

GET http://examples.ru/i/20140904/source.js HTTP/1.1
Host: examples.ru
Proxy-Connection: keep-alive
Accept: */*
User-Agent: Mozilla/5.0 (Windows NT 5.1) Chrome/41.0.2272.118 Safari/537.36
DNT: 1
Accept-Encoding: gzip, deflate, sdch
Accept-Language: ru-RU,ru;q=0.8,en-US;q=0.6,en;q=0.4

We make the following out of it:

GET /i/20140904/source.js HTTP/1.1
Host: examples.ru
Connection: keep-alive
Accept: */*
Accept-Encoding: gzip, deflate, sdch
Accept-Language: ru-RU,ru;q=0.8,en-US;q=0.6,en;q=0.4
User-Agent: Mozilla/5.0 (Windows NT 5.1) Chrome/41.0.2272.118 Safari/537.36
DNT: 1

And we send this case to port 80 and wait for a response. We read the response and close the connection if any of the subscribers specified "Connection: close" or if the server is no longer available. I so opened the connection in general only for processing 1 request and closed it after receiving a response from the server.

But here I am faced with CONNECT, a request of the form comes:

CONNECT www.google.ru:443 HTTP/1.1
Host: www.google.ru
Proxy-Connection: keep-alive
User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64) Chrome/40.0.2214.111 Safari/537.36

It is clear that I am redoing it as follows:

CONNECT / HTTP/1.1
Host: www.google.ru
Connection: keep-alive

And then I send the code 200 Connection Established to the client. I receive data from the client, which I forward to the server on port 443. In the next moment, a handshake should occur between the client and the server, which apparently happens - in response from the server comes abracadabra, which I send to the client, in response from the client I get the same abracadabra, which when trying to send to the server, an error occurs in the function send() under the number 10053-WSAECONNABORTED. And here I am until the end and can not understand how to properly process all the same CONNECT HTTP method.

Please explain in detail how to process it. Thanks.

Here is the actual code of how I handle CONNECT.

 // Выше принимается запрос и парсится.
 // Создаем внешний сокет с сервером.
 t_error = createSocketClient( ThisClient );
 if ( t_error == -1 ) return -1;

 t_error = sendStatusCodeToClient(ThisClient, 200);
 if ( t_error == -1 ) return -1;

 while ( true ) {
     // Прием запроса от клиента и передача серверу.
     while ( true ) {
         bytes_recv = recv(ThreadInfo[ThisClient].ClientSocket, &buffer[0], SIZE_BLOCK_4096, 0);
         if ( bytes_recv > 0 ) {
             flagData = true;
             bytes_send = send(ThreadInfo[ThisClient].ServerSocket, &buffer[0], bytes_recv, 0);
             if ( bytes_send == SOCKET_ERROR ) { 
                 return -1;
             }
         }
         else if ( bytes_recv == 0 ) break;
         else return -2;
     }

     if ( flagData == true )    {
         // Прием ответа от сервера и передача клиенту.
         while ( true ) {
             bytes_recv = recv(ThreadInfo[ThisClient].ServerSocket, &buffer[0], SIZE_BLOCK_8192, 0);
             if ( bytes_recv > 0 ) {
                 bytes_send = send(ThreadInfo[ThisClient].ClientSocket, &buffer[0], bytes_recv, 0);
                 if ( bytes_send == SOCKET_ERROR ) {
                     return -3;
                 }
             }
             else if ( bytes_recv == 0 )    break;
             else return -4;
         }
     }
 }