Go

Debugging with Socket Session Logging

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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.

Go

    success := false

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

    socket := chilkat.NewSocket()

    // Enable session logging:
    socket.SetKeepSessionLog(true)
    socket.SetSessionLogEncoding("esc")

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

    // Set maximum timeouts for reading an writing (in millisec)
    socket.SetMaxReadIdleMs(10000)
    socket.SetMaxSendIdleMs(10000)

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

    // Send it...
    success = socket.SendString(*httpGet)
    if success != true {
        fmt.Println(socket.LastErrorText())
        socket.DisposeSocket()
        return
    }

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

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

    // Display the session log:
    fmt.Println(socket.SessionLog())

    // Show the HTTP response header:
    fmt.Println(*httpHeader)

    socket.DisposeSocket()