TCP Socket Connect through HTTP Proxy

Demonstrates how to connect through an HTTP proxy server.

Downloads:

MS Windows Visual C/C++ Libraries

Linux/CentOS C/C++ Libraries

MAC OS X C/C++ Libraries

Solaris C/C++ Libraries

C++ Builder Libraries

// Needs #include <CkSocket.h>

    CkString strOut;

    CkSocket socket;

    bool success;
    success = socket.UnlockComponent("Anything for 30-day trial");
    if (success != true) {
        strOut.append("Failed to unlock component\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  To connect through an HTTP proxy, set the HttpProxyHostname
    //  and HttpProxyPort properties to the hostname (or IP address)
    //  and port of the HTTP proxy.  Typical port numbers used by
    //  HTTP proxy servers are 3128 and 8080.
    socket.put_HttpProxyHostname("www.my-http-proxy.com");
    socket.put_HttpProxyPort(3128);

    //  Important:  Your HTTP proxy server must allow non-HTTP
    //  traffic to pass.  Otherwise this does not work.

    //  Connect (via the HTTP proxy) to port 5555 of 192.168.1.108.
    //  hostname may be a domain name or IP address.
    const char * hostname;
    hostname = "192.168.1.108";
    bool ssl;
    ssl = false;
    long maxWaitMillisec;
    maxWaitMillisec = 20000;
    success = socket.Connect(hostname,5555,ssl,maxWaitMillisec);
    if (success != true) {
        strOut.append(socket.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  Set maximum timeouts for reading an writing (in millisec)
    socket.put_MaxReadIdleMs(10000);
    socket.put_MaxSendIdleMs(10000);

    //  The ficticious server (in this example) is going to send a "Hello World!"
    //  message.  Read it:
    const char * receivedMsg;
    receivedMsg = socket.receiveString();
    if (receivedMsg == 0 ) {
        strOut.append(socket.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  Close the connection with the server
    //  Wait a max of 20 seconds (20000 millsec)
    socket.Close(20000);

    strOut.append(receivedMsg);
    strOut.append("\r\n");

    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());