(Tcl) Demonstrates KeepSessionLog and SessionLog

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/TLS 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.

Chilkat Tcl Extension Downloads

Chilkat Tcl Extension Downloads

load ./chilkat.dll

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

set socket [new_CkSocket]

# Enable session logging:
CkSocket_put_KeepSessionLog $socket 1
CkSocket_put_SessionLogEncoding $socket "esc"

set tls 1
set maxWaitMillisec 20000
set success [CkSocket_Connect $socket "www.chilkatsoft.com" 443 $tls $maxWaitMillisec]
if {$success != 1} then {
    puts [CkSocket_lastErrorText $socket]
    delete_CkSocket $socket
    exit
}

# Send a GET start line to the web server..
set success [CkSocket_SendString $socket "GET /abc123.abc123 HTTP/1.1\r\n"]
if {$success != 1} then {
    puts [CkSocket_lastErrorText $socket]
    delete_CkSocket $socket
    exit
}

# Send some bytes that will cause an error...
set binData [new_CkBinData]

CkBinData_AppendEncoded $binData "01020304" "hex"
set success [CkSocket_SendBd $socket $binData]

# Read the response up to the first double CRLF:
set httpHeader [CkSocket_receiveUntilMatch $socket "\r\n\r\n"]
if {[CkSocket_get_LastMethodSuccess $socket] != 1} then {
    puts [CkSocket_lastErrorText $socket]
    delete_CkSocket $socket
    delete_CkBinData $binData
    exit
}

# Close the connection with the server
# Wait a max of 20 seconds (20000 millsec)
CkSocket_Close $socket 20000

# Display the session log:
puts [CkSocket_sessionLog $socket]

# The Session log will show the exact bytes sent and received.
# In this case, the session log shows:

# 	SendString: GET\x20/abc123.abc123\x20HTTP/1.1\r\n
# 		
# 	SendBytes: \x01\x02\x03\x04
# 	ReceiveUntilMatch: HTTP/1.1\x20400\x20Bad\x20Request\r\n
# 		Content-Type:\x20text/html;\x20charset=us-ascii\r\n
# 		Server:\x20Microsoft-HTTPAPI/2.0\r\n
# 		Date:\x20Thu,\x2027\x20Oct\x202016\x2013:16:02\x20GMT\r\n
# 		Connection:\x20close\r\n
# 		Content-Length:\x20339\r\n
# 		\r\n
# 		<!DOCTYPE\x20HTML\x20PUBLIC\x20\"-//W3C//DTD\x20HTML\x204.01//EN\"\"http://www.w
# 		3.org/TR/html4/strict.dtd\">\r\n
# 		<HTML><HEAD><TITLE>Bad\x20Request</TITLE>\r\n
# 		<META\x20HTTP-EQUIV=\"Content-Type\"\x20Content=\"text/html;\x20charset=us-ascii
# 		\"></HEAD>\r\n
# 		<BODY><h2>Bad\x20Request\x20-\x20Invalid\x20Header</h2>\r\n
# 		<hr><p>HTTP\x20Error\x20400.\x20The\x20request\x20has\x20an\x20invalid\x20header
# 		\x20name.</p>\r\n
# 		</BODY></HTML>\r\n
# 

delete_CkSocket $socket
delete_CkBinData $binData