Node.js

Debugging with Socket Session Logging

See more Socket/SSL/TLS Examples

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.

Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

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

    var socket = new chilkat.Socket();

    //  Enable session logging:
    socket.KeepSessionLog = true;
    socket.SessionLogEncoding = "esc";

    //  To demonstrate session logging, we'll connect to an
    //  HTTP server and download the HTTP response header:
    var ssl = false;
    var maxWaitMillisec = 20000;
    success = socket.Connect("www.chilkatsoft.com",80,ssl,maxWaitMillisec);
    if (success !== true) {
        console.log(socket.LastErrorText);
        return;
    }

    //  Set maximum timeouts for reading an writing (in millisec)
    socket.MaxReadIdleMs = 10000;
    socket.MaxSendIdleMs = 10000;

    //  The socket component includes a BuildHttpGetRequest
    //  method for convenience. Build a GET and send it to 
    //  the web server:
    var httpGet;
    httpGet = socket.BuildHttpGetRequest("http://www.chilkatsoft.com/");

    //  Send it...
    success = socket.SendString(httpGet);
    if (success !== true) {
        console.log(socket.LastErrorText);
        return;
    }

    //  Read the response up to the first double CRLF:
    var httpHeader = socket.ReceiveUntilMatch("\r\n\r\n");
    if (socket.LastMethodSuccess !== true) {
        console.log(socket.LastErrorText);
        return;
    }

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

    //  Display the session log:
    console.log(socket.SessionLog);

    //  Show the HTTP response header:
    console.log(httpHeader);

}

chilkatExample();