(Swift 3,4,5...) SFTP Simplified Download

Demonstrates how to SFTP download a file by passing a remote filepath to DownloadFileByName.

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

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

    let sftp = CkoSFtp()!

    // Set some timeouts, in milliseconds:
    sftp.connectTimeoutMs = 15000
    sftp.idleTimeoutMs = 15000

    // Connect to the SSH server.  
    // The standard SSH port = 22
    // The hostname may be a hostname or IP address.
    var hostname: String? = "sftp.example.com"
    var port: Int = 22
    var success: Bool = sftp.connect(hostname, port: port)
    if success != true {
        print("\(sftp.lastErrorText!)")
        return
    }

    // Authenticate with the SSH server.  Chilkat SFTP supports
    // both password-based authenication as well as public-key
    // authentication.  This example uses password authenication.
    success = sftp.authenticatePw("myLogin", password: "myPassword")
    if success != true {
        print("\(sftp.lastErrorText!)")
        return
    }

    // After authenticating, the SFTP subsystem must be initialized:
    success = sftp.initializeSftp()
    if success != true {
        print("\(sftp.lastErrorText!)")
        return
    }

    // Download the file:
    var remoteFilePath: String?
    var localFilePath: String?
    localFilePath = "c:/temp/hamlet.xml"
    // Note: The remote filepath may be an absolute filepath,
    // a relative filepath, or simply a filename.  
    // Relative filepaths are always relative to the home directory
    // of the SFTP/SSH user account.  There is no such thing
    // as "current remote directory" in the SFTP protocol. 
    // A filename with no path implies that the file is located
    // in the SFTP user account's home directory.
    remoteFilePath = "subdir1/subdir2/hamlet.xml"
    success = sftp.downloadFile(byName: remoteFilePath, localFilePath: localFilePath)
    if success != true {
        print("\(sftp.lastErrorText!)")
        return
    }

    print("Success.")

}