(Swift 3,4,5...) SFTP Synchronize Directory Tree - Download

Demonstrates how to download files to synchronize a local directory tree with a remote directory tree. The SyncTreeDownload method recursively descends the remote directory tree and downloads files based on existence, last-mod date/time and/or size differences.

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 SFTP API to have been previously unlocked.
    // See Unlock Chilkat SFTP for sample code.

    let sftp = CkoSFtp()!

    var success: Bool = sftp.connect("my-ssh-server.com", port: 22)
    if success == true {
        success = sftp.authenticatePw("mySshLogin", password: "mySshPassword")
    }

    if success == true {
        success = sftp.initializeSftp()
    }

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

    // Synchronize the remote directory tree rooted at "syncDownloadTest/xml"
    // with the local directory tree rooted at "qa_output"
    // Both directories are relative paths.  The remote directory
    // is relative to the HOME directory of the SSH user account.
    // The local directory is relative to the current working directory of the process.
    // It is also possible to use absolute paths.

    var remoteDir: String? = "syncDownloadTest/xml"
    var localDir: String? = "qa_output"

    // Possible modes that can be passed to the SyncTreeDownload method are:
    // mode=0: Download all files
    // mode=1: Download all files that do not exist on the local filesystem.
    // mode=2: Download newer or non-existant files.
    // mode=3: Download only newer files. If a file does not already exist on the local filesystem, it is not downloaded from the server.
    // mode=5: Download only missing files or files with size differences.
    // mode=6: Same as mode 5, but also download newer files.
    // mode=99: Do not download files, but instead delete remote files that do not exist locally.

    // This example will use mode 6 to download missing, newer, or files with size differences.
    var mode: Int = 6
    // This example will turn on recursion to synchronize the entire tree. 
    // Recursion can be turned off to synchronize the files of a single directory.
    var recursive: Bool = true
    success = sftp.syncTreeDownload(remoteDir, localRoot: localDir, mode: mode, recurse: recursive)
    if success != true {
        print("\(sftp.lastErrorText!)")
        return
    }

    print("Success.")

}