Demonstrates KeepSessionLog and SessionLog

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/TLS 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.

Chilkat C Downloads

Download Chilkat for C

#include <C_CkSocket.h>
#include <C_CkBinData.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkSocket socket;
    BOOL tls;
    int maxWaitMillisec;
    HCkBinData binData;
    const char *httpHeader;

    success = FALSE;

    //  This example assumes the Chilkat Socket API to have been previously unlocked.
    //  See Socket Unlock Sample for sample code.

    socket = CkSocket_Create();

    //  Enable session logging:
    CkSocket_putKeepSessionLog(socket,TRUE);
    CkSocket_putSessionLogEncoding(socket,"esc");

    tls = TRUE;
    maxWaitMillisec = 20000;
    success = CkSocket_Connect(socket,"www.chilkatsoft.com",443,tls,maxWaitMillisec);
    if (success != TRUE) {
        printf("%s\n",CkSocket_lastErrorText(socket));
        CkSocket_Dispose(socket);
        return;
    }

    //  Send a GET start line to the web server..
    success = CkSocket_SendString(socket,"GET /abc123.abc123 HTTP/1.1\r\n");
    if (success != TRUE) {
        printf("%s\n",CkSocket_lastErrorText(socket));
        CkSocket_Dispose(socket);
        return;
    }

    //  Send some bytes that will cause an error...
    binData = CkBinData_Create();
    CkBinData_AppendEncoded(binData,"01020304","hex");
    success = CkSocket_SendBd(socket,binData);

    //  Read the response up to the first double CRLF:
    httpHeader = CkSocket_receiveUntilMatch(socket,"\r\n\r\n");
    if (CkSocket_getLastMethodSuccess(socket) != TRUE) {
        printf("%s\n",CkSocket_lastErrorText(socket));
        CkSocket_Dispose(socket);
        CkBinData_Dispose(binData);
        return;
    }

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

    //  Display the session log:
    printf("%s\n",CkSocket_sessionLog(socket));

    //  The Session log will show the exact bytes sent and received.
    //  In this case, the session log shows:

    //  	SendString: GET\x20/abc123.abc123\x20HTTP/1.1\r\n
    //  		
    //  	SendBytes: \x01\x02\x03\x04
    //  	ReceiveUntilMatch: HTTP/1.1\x20400\x20Bad\x20Request\r\n
    //  		Content-Type:\x20text/html;\x20charset=us-ascii\r\n
    //  		Server:\x20Microsoft-HTTPAPI/2.0\r\n
    //  		Date:\x20Thu,\x2027\x20Oct\x202016\x2013:16:02\x20GMT\r\n
    //  		Connection:\x20close\r\n
    //  		Content-Length:\x20339\r\n
    //  		\r\n
    //  		<!DOCTYPE\x20HTML\x20PUBLIC\x20\"-//W3C//DTD\x20HTML\x204.01//EN\"\"http://www.w
    //  		3.org/TR/html4/strict.dtd\">\r\n
    //  		<HTML><HEAD><TITLE>Bad\x20Request</TITLE>\r\n
    //  		<META\x20HTTP-EQUIV=\"Content-Type\"\x20Content=\"text/html;\x20charset=us-ascii
    //  		\"></HEAD>\r\n
    //  		<BODY><h2>Bad\x20Request\x20-\x20Invalid\x20Header</h2>\r\n
    //  		<hr><p>HTTP\x20Error\x20400.\x20The\x20request\x20has\x20an\x20invalid\x20header
    //  		\x20name.</p>\r\n
    //  		</BODY></HTML>\r\n
    //  


    CkSocket_Dispose(socket);
    CkBinData_Dispose(binData);

    }