(Objective-C) FTP Sync Download Tree w/ Must-Match Constraints

Demonstrates how synchronize a directory tree in the download direction, but only for files matching a set of wildcard filenames.

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

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#import <CkoFtp2.h>

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

CkoFtp2 *ftp = [[CkoFtp2 alloc] init];

ftp.Hostname = @"ftp.something.com";
ftp.Username = @"my_login";
ftp.Password = @"my_password";

// Connect and login to the FTP server.
BOOL success = [ftp Connect];
if (success != YES) {
    NSLog(@"%@",ftp.LastErrorText);
    return;
}

// Set the current remote directory to the root of
// the tree to be downloaded.
success = [ftp ChangeRemoteDir: @"/subDir1"];
if (success != YES) {
    NSLog(@"%@",ftp.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.

// This example will download all files, but only those files having filenames
// that match *.gif and *.eml

// 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/

// Indicate that we only want to create auto-create local directories (if needed)
// for the files that are actually downloaded.  If SyncCreateAllLocalDirs remains
// YES, then the corresponding local directory is created for each remote directory
// traversed regardless of whether files within are downloaded.
ftp.SyncCreateAllLocalDirs = NO;

ftp.SyncMustMatch = @"*.eml; *.gif";
int mode = 0;
success = [ftp SyncLocalTree: @"c:/temp/subDir1" mode: [NSNumber numberWithInt: mode]];
if (success != YES) {
    NSLog(@"%@",ftp.LastErrorText);
    return;
}

success = [ftp Disconnect];

// Show the files downloaded.
NSLog(@"%@",ftp.SyncedFiles);

// Output showing the files downloaded:

// chiliPepper.gif
// abc/chiliPepper.gif
// data/chiliPepper.gif
// data/xyz/dkimVerifyTest.eml
// data/xyz/emailForCreateDsn.eml