CkPython

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.

CkPython

import sys
import chilkat

success = False

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

socket = chilkat.CkSocket()

# Enable session logging:
socket.put_KeepSessionLog(True)
socket.put_SessionLogEncoding("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):
    print(socket.lastErrorText())
    sys.exit()

# Set maximum timeouts for reading an writing (in millisec)
socket.put_MaxReadIdleMs(10000)
socket.put_MaxSendIdleMs(10000)

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

httpGet = socket.buildHttpGetRequest("http://www.chilkatsoft.com/")

# Send it...
success = socket.SendString(httpGet)
if (success != True):
    print(socket.lastErrorText())
    sys.exit()

# Read the response up to the first double CRLF:
httpHeader = socket.receiveUntilMatch("\r\n\r\n")
if (socket.get_LastMethodSuccess() != True):
    print(socket.lastErrorText())
    sys.exit()

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

# Display the session log:
print(socket.sessionLog())

# Show the HTTP response header:
print(httpHeader)