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 = 1. 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.

Download Chilkat Socket ActiveX

LOCAL loSocket
LOCAL lnSuccess
LOCAL lnSsl
LOCAL lnMaxWaitMillisec
LOCAL lcRcvdStr

loSocket = CreateObject('Chilkat.Socket')

lnSuccess = loSocket.UnlockComponent("Anything for 30-day trial")
IF (lnSuccess <> 1) THEN
    =MESSAGEBOX("Failed to unlock component")
    QUIT
ENDIF

*  Enable session logging:
loSocket.KeepSessionLog = 1
loSocket.SessionLogEncoding = "esc"

*  To demonstrate session logging, we'll connect to an
*  FTP server and see what it sends for the initial greeting:

lnSsl = 0

lnMaxWaitMillisec = 20000
lnSuccess = loSocket.Connect("www.secureftp-test.com",21,lnSsl,lnMaxWaitMillisec)
IF (lnSuccess <> 1) THEN
    =MESSAGEBOX(loSocket.LastErrorText)
    QUIT
ENDIF

*  Set maximum timeouts for reading an writing (in millisec)
loSocket.MaxReadIdleMs = 10000
loSocket.MaxSendIdleMs = 10000

*  Read whatever bytes are available at this point...

lcRcvdStr = loSocket.ReceiveString()
IF (lcRcvdStr = NULL ) THEN
    =MESSAGEBOX(loSocket.LastErrorText)
    QUIT
ENDIF

*  Close the connection with the server
*  Wait a max of 20 seconds (20000 millsec)
loSocket.Close(20000)

*  Display the session log:
? loSocket.SessionLog