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POC++/CLI HTTP Proxy problems
 

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  1. POC++/CLI HTTP Proxy problems
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    <p>I'm trying(very hard) to make a small HTTP Proxy server which I can use to save all communications to a file. Seeing as I dont really have any experience in the area, I used a class from codeproject.com and some associated code to get started (It was made in the old CLI syntax, so I converted it). I couldn't get it working, so I added lots more code to make it work (threads etc), and now it sort of works. Basically, it recieves something from a client (I just configured Mozilla Firefox to route its connections through this proxy) and then routes it to google.com. After it sends Firefox's data to google, recieves a responce, and sends that to Firefox. This works fine, but then the proxy fails to recieve any data from Firefox. It just loops in the Sleep(50) section. Anyway, heres the code:</p> <p><strong>ProxyTest.cpp:</strong></p> <pre><code>#include "stdafx.h" #include "windows.h" #include "CHTTPProxy.h" public ref class ClientThread { public: System::Net::Sockets::TcpClient ^ pClient; CHttpProxy ^ pProxy; System::Int32 ^ pRecieveBufferSize; System::Threading::Thread ^ Thread; ClientThread(System::Net::Sockets::TcpClient ^ sClient, CHttpProxy ^ sProxy, System::Int32 ^ sRecieveBufferSize) { pClient = sClient; pProxy = sProxy; pRecieveBufferSize = sRecieveBufferSize; }; void StartReading() { Thread = gcnew System::Threading::Thread(gcnew System::Threading::ThreadStart(this,&amp;ClientThread::ThreadEntryPoint)); Thread-&gt;Start(); }; void ThreadEntryPoint() { char * bytess; bytess = new char[(int)pRecieveBufferSize]; memset(bytess, 0, (int)pRecieveBufferSize); array&lt;unsigned char&gt; ^ bytes = gcnew array&lt;unsigned char&gt;((int)pRecieveBufferSize); array&lt;unsigned char&gt; ^ sendbytes; do { if (pClient-&gt;GetStream()-&gt;DataAvailable) { try { do { Sleep(100); //Lets wait for whole packet to get cached (If it even does...) unsigned int k = pClient-&gt;GetStream()-&gt;Read(bytes, 0, (int)pRecieveBufferSize); //Read it for (unsigned int i=0; i&lt;(int)pRecieveBufferSize; i++) bytess[i] = bytes[i]; Console::WriteLine("Packet Received:\n"+gcnew System::String(bytess)); pProxy-&gt;SendToServer(bytes,pClient-&gt;GetStream()); //Now send it to google! } while (pClient-&gt;GetStream()-&gt;DataAvailable); } catch (Exception ^ e) { break; } } else { Sleep(50); if (!(pClient-&gt;Connected)) break; }; } while (pClient-&gt;GetStream()-&gt;CanRead); delete [] bytess; pClient-&gt;Close(); }; }; int main(array&lt;System::String ^&gt; ^args) { System::Collections::Generic::Stack&lt;ClientThread ^&gt; ^ Clients = gcnew System::Collections::Generic::Stack&lt;ClientThread ^&gt;(); System::Net::Sockets::TcpListener ^ pTcpListener = gcnew System::Net::Sockets::TcpListener(8080); pTcpListener-&gt;Start(); System::Net::Sockets::TcpClient ^ pTcpClient; while (1) { pTcpClient = pTcpListener-&gt;AcceptTcpClient(); //Wait for client ClientThread ^ Client = gcnew ClientThread(pTcpClient, gcnew CHttpProxy("www.google.com.au", 80), pTcpClient-&gt;ReceiveBufferSize); //Make a new object for this client Client-&gt;StartReading(); //Start the thread Clients-&gt;Push(Client); //Add it to the list }; pTcpListener-&gt;Stop(); return 0; } </code></pre> <p><strong>CHTTPProxy.h</strong>, from <a href="http://www.codeproject.com/KB/IP/howtoproxy.aspx" rel="nofollow noreferrer">http://www.codeproject.com/KB/IP/howtoproxy.aspx</a> with a lot of modifications:</p> <pre><code>#using &lt;mscorlib.dll&gt; #using &lt;SYSTEM.DLL&gt; using namespace System; using System::Net::Sockets::TcpClient; using System::String; using System::Exception; using System::Net::Sockets::NetworkStream; #include &lt;stdio.h&gt; ref class CHttpProxy { public: CHttpProxy(System::String ^ szHost, int port); System::String ^ m_host; int m_port; void SendToServer(array&lt;unsigned char&gt; ^ Packet, System::Net::Sockets::NetworkStream ^ sendstr); }; CHttpProxy::CHttpProxy(System::String ^ szHost, int port) { m_host = gcnew System::String(szHost); m_port = port; } void CHttpProxy::SendToServer(array&lt;unsigned char&gt; ^ Packet, System::Net::Sockets::NetworkStream ^ sendstr) { TcpClient ^ tcpclnt = gcnew TcpClient(); try { tcpclnt-&gt;Connect(m_host,m_port); } catch (Exception ^ e ) { Console::WriteLine(e-&gt;ToString()); return; } // Send it if ( tcpclnt ) { NetworkStream ^ networkStream; networkStream = tcpclnt-&gt;GetStream(); int size = Packet-&gt;Length; networkStream-&gt;Write(Packet, 0, size); array&lt;unsigned char&gt; ^ bytes = gcnew array&lt;unsigned char&gt;(tcpclnt-&gt;ReceiveBufferSize); char * bytess = new char[tcpclnt-&gt;ReceiveBufferSize]; Sleep(500); //Wait for responce do { unsigned int k = networkStream-&gt;Read(bytes, 0, (int)tcpclnt-&gt;ReceiveBufferSize); //Read from google for(unsigned int i=0; i&lt;k; i++) { bytess[i] = bytes[i]; if (bytess[i] == 0) bytess[i] = ' '; //Dont terminate the string if (bytess[i] &lt; 8) bytess[i] = ' '; //Somethings making the computer beep, and its not 7?!?! }; Console::WriteLine("\n\nAbove packet sent to google. Google Packet Received:\n"+gcnew System::String(bytess)); sendstr-&gt;Write(bytes,0,k); //Send it to mozilla Console::WriteLine("\n\nAbove packet sent to client..."); //Sleep(1000); } while(networkStream-&gt;DataAvailable); delete [] bytess; } return; } </code></pre> <p>Any help would be much appreciated, I've tried for hours. (Sorry about the indents nobugz, its fixed now)</p>
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    1. CO@Per Lundberg It's just you, this is not a school assignment :) Also, It was kinda written 3 years ago, so I hardly think it would matter even if it was lol
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    2. COGood point! :D Did you ever manage to solve it?
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    3. CO@Per Lundberg Unfortunately not, sorry...
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