(MFC) Debugging with Socket Session Logging

Debugging with socket session logging.

The Chilkat Socket component provides properties for keeping a session log making it possible to see the exact bytes received and sent on a TCP/IP or SSL connection. To enable session logging, set the KeepSessionLog property = true. The SessionLogEncoding property controls how binary, non-printable bytes are represented in the log. There are two possible settings: Possible values are "esc" and "hex". The default value is "esc".

When set to "hex", the bytes are encoded as a hexidecimalized string. The "esc" encoding is a C-string like encoding, and is more compact than hex if most of the data to be logged is text. Printable us-ascii chars are unmodified. Common "C" control chars are represented as "\r", "\n", "\t", etc. Non-printable and byte values greater than 0x80 are escaped using a backslash and hex encoding: \xHH. Certain printable chars are backslashed: SPACE, double-quote, single-quote, etc.

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// Needs #include <CkSocket.h>

    CkString strOut;

    CkSocket socket;

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

    //  Enable session logging:
    socket.put_KeepSessionLog(true);
    socket.put_SessionLogEncoding("esc");

    //  To demonstrate session logging, we'll connect to an
    //  HTTP server and download the HTTP response header:
    bool ssl;
    ssl = false;
    long maxWaitMillisec;
    maxWaitMillisec = 20000;
    success = socket.Connect("www.chilkatsoft.com",80,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 socket component includes a BuildHttpGetRequest
    //  method for convenience. Build a GET and send it to
    //  the web server:
    const char * httpGet;
    httpGet = socket.buildHttpGetRequest("http://www.chilkatsoft.com/");

    //  Send it...
    success = socket.SendString(httpGet);
    if (success != true) {
        strOut.append(socket.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  Read the response up to the first double CRLF:
    const char * httpHeader;
    httpHeader = socket.receiveUntilMatch("\r\n\r\n");
    if (httpHeader == 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);

    //  Display the session log:
    strOut.append(socket.sessionLog());
    strOut.append("\r\n");

    //  Show the HTTP response header:
    strOut.append(httpHeader);
    strOut.append("\r\n");

    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());