Tcl

Clear the SFTP Session Log

Demonstrates the Chilkat SFtp.ClearSessionLog method, which clears the in-memory text stored in the SessionLog property. It takes no arguments.

Background: With session logging enabled, the SessionLog accumulates a running record of the session's activity that is invaluable for diagnosing a failed transfer. Over a long-lived session that log grows unbounded, so clearing it frees memory — and, more usefully, lets you capture the log for one specific operation in isolation by clearing it just before and reading it just after.

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Tcl


load ./chilkat.dll

set success 0

#  Demonstrates the SFtp.ClearSessionLog method, which clears the in-memory text stored in the
#  SessionLog property.  It takes no arguments.

set sftp [new_CkSFtp]

#  Connect, authenticate, and initialize the SFTP subsystem.
set port 22
set success [CkSFtp_Connect $sftp "sftp.example.com" $port]
if {$success == 0} then {
    puts [CkSFtp_lastErrorText $sftp]
    delete_CkSFtp $sftp
    exit
}

#  Normally you would not hard-code the password in source.  You should instead obtain it
#  from an interactive prompt, environment variable, or a secrets vault.
set password "mySshPassword"

set success [CkSFtp_AuthenticatePw $sftp "mySshLogin" $password]
if {$success == 0} then {
    puts [CkSFtp_lastErrorText $sftp]
    delete_CkSFtp $sftp
    exit
}

set success [CkSFtp_InitializeSftp $sftp]
if {$success == 0} then {
    puts [CkSFtp_lastErrorText $sftp]
    delete_CkSFtp $sftp
    exit
}

#  When KeepSessionLog is enabled, the SessionLog property accumulates a record of the session's
#  activity, which is useful for debugging.
CkSFtp_put_KeepSessionLog $sftp 1

#  ... perform operations ...

#  Clear the accumulated log, for example before starting a new logical operation whose log you
#  want to capture in isolation.
CkSFtp_ClearSessionLog $sftp
puts "Session log cleared."

CkSFtp_Disconnect $sftp

delete_CkSFtp $sftp