(Swift 3,4,5...) SFTP Sync Download Tree w/ Must-Match Directory Constraints

Demonstrates how SFTP synchronize a directory tree in the download direction, but only entering directories matching a set of wildcard filenames.

Note: This example requires Chilkat v9.5.0.76 or greater.

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

func chilkatTest() {
    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
    }

    // Possible synchronization modes 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.

    // Only enter remote directories named either "data" or matching "x*"
    sftp.syncMustMatchDir = "data; x*"

    // Imagine our remote directory tree has these files and directories:

    // 	accentedLatin1.txt
    // 	accentedUtf8.txt
    // 	alice.key
    // 	anter_cert.pem
    // 	chiliPepper.gif
    // 	helloWorld.pdf
    // 	abc/chiliPepper.gif
    // 	abc/ghk/
    // 	data/chiliPepper.gif
    // 	data/xyz/dkimHtmlBody.txt
    // 	data/xyz/dkimVerifyTest.eml
    // 	data/xyz/emailForCreateDsn.eml
    // 	text/frenchUtf8.txt
    // 	text/helloWorld.txt
    // 	text/PolishEmailBody.txt
    // 	text/something/

    var remoteDir: String? = "syncDownloadTest/someDir"
    var localDir: String? = "qa_output"
    var mode: Int = 0
    var recursive: Bool = true
    success = sftp.syncTreeDownload(remoteDir, localRoot: localDir, mode: mode, recurse: recursive)
    if success != true {
        print("\(sftp.lastErrorText!)")
        return
    }

    // The following files were downloaded:

    // accentedLatin1.txt
    // accentedUtf8.txt
    // alice.key
    // anter_cert.pem
    // chiliPepper.gif
    // helloWorld.pdf
    // data/chiliPepper.gif
    // data/xyz/dkimHtmlBody.txt
    // data/xyz/dkimVerifyTest.eml
    // data/xyz/emailForCreateDsn.eml

    print("Success.")

}