Xbase++

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.

Xbase++

LOCAL nSuccess
LOCAL oSocket
LOCAL nSsl
LOCAL nMaxWaitMillisec
LOCAL cHttpGet
LOCAL cHttpHeader

nSuccess := 0

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

oSocket := CreateObject("Chilkat.Socket")

//  Enable session logging:
oSocket:KeepSessionLog := 1
oSocket:SessionLogEncoding := "esc"

//  To demonstrate session logging, we'll connect to an
//  HTTP server and download the HTTP response header:
nSsl := 0
nMaxWaitMillisec := 20000
nSuccess := oSocket:Connect("www.chilkatsoft.com", 80, nSsl, nMaxWaitMillisec)
IF (nSuccess != 1)
    ? oSocket:LastErrorText
    oSocket:destroy()
    RETURN
ENDIF

//  Set maximum timeouts for reading an writing (in millisec)
oSocket:MaxReadIdleMs := 10000
oSocket:MaxSendIdleMs := 10000

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

cHttpGet := oSocket:BuildHttpGetRequest("http://www.chilkatsoft.com/")

//  Send it...
nSuccess := oSocket:SendString(cHttpGet)
IF (nSuccess != 1)
    ? oSocket:LastErrorText
    oSocket:destroy()
    RETURN
ENDIF

//  Read the response up to the first double CRLF:
cHttpHeader := oSocket:ReceiveUntilMatch(Chr(13) + Chr(10) + Chr(13) + Chr(10))
IF (oSocket:LastMethodSuccess != 1)
    ? oSocket:LastErrorText
    oSocket:destroy()
    RETURN
ENDIF

//  Close the connection with the server
//  Wait a max of 20 seconds (20000 millsec)
nSuccess := oSocket:Close(20000)

//  Display the session log:
? oSocket:SessionLog

//  Show the HTTP response header:
? cHttpHeader

oSocket:destroy()