(Objective-C) SCP Sync Tree Download

Synchronize local and remote directory trees by downloading newer or missing files from the remote server.

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#import <CkoSsh.h>
#import <NSString.h>
#import <CkoScp.h>

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

CkoSsh *ssh = [[CkoSsh alloc] init];

// Connect to an SSH server:
NSString *hostname = 0;
int port;

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

BOOL success = [ssh Connect: hostname port: [NSNumber numberWithInt: port]];
if (success != YES) {
    NSLog(@"%@",ssh.LastErrorText);
    return;
}

// Wait a max of 5 seconds when reading responses..
ssh.IdleTimeoutMs = [NSNumber numberWithInt:5000];

// Authenticate using login/password:
success = [ssh AuthenticatePw: @"myLogin" password: @"myPassword"];
if (success != YES) {
    NSLog(@"%@",ssh.LastErrorText);
    return;
}

// Once the SSH object is connected and authenticated, we use it
// in our SCP object.
CkoScp *scp = [[CkoScp alloc] init];

success = [scp UseSsh: ssh];
if (success != YES) {
    NSLog(@"%@",scp.LastErrorText);
    return;
}

NSString *remoteRoot = @"workspace/php";
NSString *localRoot = @"c:/aaworkarea/scp/workspace/php";

// Download synchronization modes:
// 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.
int mode = 2;

// Sync the entire tree by using recursion.
BOOL bRecurse = YES;

success = [scp SyncTreeDownload: remoteRoot localRoot: localRoot mode: [NSNumber numberWithInt: mode] bRecurse: bRecurse];
if (success != YES) {
    NSLog(@"%@",scp.LastErrorText);
    return;
}

NSLog(@"%@",@"SCP sync download success.");

// Disconnect
[ssh Disconnect];