(Swift 3,4,5...) SSH Quick/Simple Shell Session

See more SSH Examples

Demonstrates the simplified way to run multiple commands in a shell session on an SSH server.

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

    let ssh = CkoSsh()!

    var port: Int = 22
    var success: Bool = ssh.connect("the-ssh-server.com", port: port)
    if success != true {
        print("\(ssh.lastErrorText!)")
        return
    }

    // Authenticate using login/password:
    success = ssh.authenticatePw("theSshLogin", password: "theSshPassword")
    if success != true {
        print("\(ssh.lastErrorText!)")
        return
    }

    // Start a shell session.
    // (The QuickShell method was added in Chilkat v9.5.0.65)
    var channelNum: Int = ssh.quickShell().intValue
    if channelNum < 0 {
        print("\(ssh.lastErrorText!)")
        return
    }

    // Construct a StringBuilder with multiple commands, one per line.
    // Note: The line-endings are potentially important.  Some SSH servers may
    // require either LF or CRLF line endings.  (Unix/Linux/OSX servers typically
    // use bare-LF line endings.  Windows servers likely use CRLF line endings.)
    let sbCommands = CkoStringBuilder()!
    sbCommands.append("echo hello world\n")
    sbCommands.append("date\n")
    sbCommands.append("df\n")

    // For our last command, we're going to echo a marker string that
    // we'll use in ChannelReceiveUntilMatch below.
    // The use of single quotes around 'IS' is a trick so that the output
    // of the command is "THIS IS THE END OF THE SCRIPT", but the terminal echo
    // includes the single quotes.  This allows us to read until we see the actual
    // output of the last command.
    sbCommands.append("echo THIS 'IS' THE END OF THE SCRIPT\n")

    // Send the commands..
    success = ssh.channelSendString(channelNum, strData: sbCommands.getAsString(), charset: "ansi")
    if success != true {
        print("\(ssh.lastErrorText!)")
        return
    }

    // Send an EOF to indicate no more commands will be sent.
    // For brevity, we're not checking the return values of each method call.
    // Your code should check the success/failure of each call.
    success = ssh.channelSendEof(channelNum)

    // Receive output up to our marker.
    success = ssh.channelReceive(untilMatch: channelNum, matchPattern: "THIS IS THE END OF THE SCRIPT", charset: "ansi", caseSensitive: true)

    // Close the channel.
    // It is important to close the channel only after receiving the desired output.
    success = ssh.channelSendClose(channelNum)

    // Get any remaining output..
    success = ssh.channelReceive(toClose: channelNum)

    // Get the complete output for all the commands in the session.
    print("--- output ----")
    print("\(ssh.getReceivedText(channelNum, charset: "ansi")!)")

    // Here's our actual sample output:

    // 	Last login: Thu Dec 22 20:19:09 2016 from chilkat13
    // 
    // 	echo hello world
    // 	date
    // 	df
    // 	echo THIS 'IS' THE END OF THE SCRIPT
    // 	chilkatosx:~ chilkat$ echo hello world
    // 	hello world
    // 	chilkatosx:~ chilkat$ date
    // 	Thu Dec 22 20:30:48 CST 2016
    // 	chilkatosx:~ chilkat$ df
    // 	Filesystem    512-blocks      Used  Available Capacity  iused     ifree %iused  Mounted on
    // 	/dev/disk2    2176716032 265768928 1910435104    13% 33285114 238804388   12%   /
    // 	devfs                383       383          0   100%      664         0  100%   /dev
    // 	map -hosts             0         0          0   100%        0         0  100%   /net
    // 	map auto_home          0         0          0   100%        0         0  100%   /home
    // 	/dev/disk3s2      374668    374668          0   100%    93665         0  100%   /Volumes/Google Chrome
    // 	chilkatosx:~ chilkat$ echo THIS 'IS' THE END OF THE SCRIPT
    // 	THIS IS THE END OF THE SCRIPT
    // 	chilkatosx:~ chilkat$ 

}