Swift

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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func chilkatTest() {
    var success: Bool = false

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

    let sftp = CkoSFtp()!

    //  Connect, authenticate, and initialize the SFTP subsystem.
    var port: Int = 22
    success = sftp.connect(hostname: "sftp.example.com", port: port)
    if success == false {
        print("\(sftp.lastErrorText!)")
        return
    }

    //  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.
    var password: String? = "mySshPassword"

    success = sftp.authenticatePw(login: "mySshLogin", password: password)
    if success == false {
        print("\(sftp.lastErrorText!)")
        return
    }

    success = sftp.initializeSftp()
    if success == false {
        print("\(sftp.lastErrorText!)")
        return
    }

    //  When KeepSessionLog is enabled, the SessionLog property accumulates a record of the session's
    //  activity, which is useful for debugging.
    sftp.keepSessionLog = true

    //  ... perform operations ...

    //  Clear the accumulated log, for example before starting a new logical operation whose log you
    //  want to capture in isolation.
    sftp.clearSessionLog()
    print("Session log cleared.")

    sftp.disconnect()

}