(Swift 3,4,5...) SCP Upload Contents of String to Remote File

Demonstrates how to upload the contents of a string variable using the SCP protocol (Secure Copy Protocol over SSH). The text is uploaded to a file in specific remote directory. If the file did not already exist, it is created. If it already existed, it is overwritten.

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

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

    let ssh = CkoSsh()!

    // Connect to an SSH server:
    var hostname: String?
    var port: Int

    // Hostname may be an IP address or hostname:
    hostname = "www.some-ssh-server.com"
    port = 22

    var success: Bool = ssh.connect(hostname, port: port)
    if success != true {
        print("\(ssh.lastErrorText!)")
        return
    }

    // Wait a max of 5 seconds when reading responses..
    ssh.idleTimeoutMs = 5000

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

    // Once the SSH object is connected and authenticated, we use it
    // as the underlying transport in our SCP object.
    let scp = CkoScp()!

    success = scp.use(ssh)
    if success != true {
        print("\(scp.lastErrorText!)")
        return
    }

    var content: String? = "This string will be the contents of the remote file."
    var remotePath: String? = "uploads/text/testUtf8.txt"

    // The utf-8 byte representation of the string will be uploaded.
    // See https://www.chilkatsoft.com/p/p_463.asp for a list of valid charsets.
    var charset: String? = "utf-8"

    // This uploads to the "uploads/text" directory relative to the HOME
    // directory of the SSH user account.  
    // Note: The remote target directory must already exist on the SSH server.
    success = scp.uploadString(remotePath, textData: content, charset: charset)
    if success != true {
        print("\(scp.lastErrorText!)")
        return
    }

    remotePath = "uploads/text/testUtf8_withBOM.txt"

    // To include the utf-8 preamble (also known as the BOM),
    // prefix the charset name with "bom:".  Any charset that can 
    // optionally include a BOM can be specified in this way.
    charset = "bom:utf-8"

    // Uploads to a remote file that contains text in the 
    // utf-8 representation, including the BOM at the start of the file.
    success = scp.uploadString(remotePath, textData: content, charset: charset)
    if success != true {
        print("\(scp.lastErrorText!)")
        return
    }

    print("SCP upload string success.")

    // Disconnect
    ssh.disconnect()

}