DataFlex

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.

DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoSocket
    Boolean iSsl
    Integer iMaxWaitMillisec
    String sHttpGet
    String sHttpHeader
    String sTemp1
    Boolean bTemp1

    Move False To iSuccess

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

    Get Create (RefClass(cComChilkatSocket)) To hoSocket
    If (Not(IsComObjectCreated(hoSocket))) Begin
        Send CreateComObject of hoSocket
    End

    // Enable session logging:
    Set ComKeepSessionLog Of hoSocket To True
    Set ComSessionLogEncoding Of hoSocket To "esc"

    // To demonstrate session logging, we'll connect to an
    // HTTP server and download the HTTP response header:
    Move False To iSsl
    Move 20000 To iMaxWaitMillisec
    Get ComConnect Of hoSocket "www.chilkatsoft.com" 80 iSsl iMaxWaitMillisec To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoSocket To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Set maximum timeouts for reading an writing (in millisec)
    Set ComMaxReadIdleMs Of hoSocket To 10000
    Set ComMaxSendIdleMs Of hoSocket To 10000

    // The socket component includes a BuildHttpGetRequest
    // method for convenience. Build a GET and send it to 
    // the web server:

    Get ComBuildHttpGetRequest Of hoSocket "http://www.chilkatsoft.com/" To sHttpGet

    // Send it...
    Get ComSendString Of hoSocket sHttpGet To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoSocket To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Read the response up to the first double CRLF:
    Get ComReceiveUntilMatch Of hoSocket (character(13)) + (character(10)) + (character(13)) + (character(10)) To sHttpHeader
    Get ComLastMethodSuccess Of hoSocket To bTemp1
    If (bTemp1 <> True) Begin
        Get ComLastErrorText Of hoSocket To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Close the connection with the server
    // Wait a max of 20 seconds (20000 millsec)
    Get ComClose Of hoSocket 20000 To iSuccess

    // Display the session log:
    Get ComSessionLog Of hoSocket To sTemp1
    Showln sTemp1

    // Show the HTTP response header:
    Showln sHttpHeader


End_Procedure