(Objective-C) SFTP Upload from Local Filesystem

Demonstrates how to upload a file to an SSH server. There are no limitations on file size, and the file is streamed directly from the local filesystem.

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#import <CkoSFtp.h>
#import <NSString.h>

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

CkoSFtp *sftp = [[CkoSFtp alloc] init];

// Set some timeouts, in milliseconds:
sftp.ConnectTimeoutMs = [NSNumber numberWithInt:5000];
sftp.IdleTimeoutMs = [NSNumber numberWithInt:10000];

// Connect to the SSH server.  
// The standard SSH port = 22
// The hostname may be a hostname or IP address.
NSString *hostname = @"sftp.example.com";
int port = 22;
BOOL success = [sftp Connect: hostname port: [NSNumber numberWithInt: port]];
if (success != YES) {
    NSLog(@"%@",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 != YES) {
    NSLog(@"%@",sftp.LastErrorText);
    return;
}

// After authenticating, the SFTP subsystem must be initialized:
success = [sftp InitializeSftp];
if (success != YES) {
    NSLog(@"%@",sftp.LastErrorText);
    return;
}

// Open a file for writing on the SSH server.
// If the file already exists, it is overwritten.
// (Specify "createNew" instead of "createTruncate" to
// prevent overwriting existing files.)
NSString *handle = [sftp OpenFile: @"hamlet.xml" access: @"writeOnly" createDisp: @"createTruncate"];
if (sftp.LastMethodSuccess != YES) {
    NSLog(@"%@",sftp.LastErrorText);
    return;
}

// Upload from the local file to the SSH server.
success = [sftp UploadFile: handle fromFilePath: @"c:/temp/hamlet.xml"];
if (success != YES) {
    NSLog(@"%@",sftp.LastErrorText);
    return;
}

// -----------------------------------------------------------------------------
// This is important.  You must close the handle on the server.
// Otherwise open handles will accumulate on the server until eventually a limit
// is reached and the server will fail on a call to OpenFile.
// -----------------------------------------------------------------------------

// Close the file.
success = [sftp CloseHandle: handle];
if (success != YES) {
    NSLog(@"%@",sftp.LastErrorText);
    return;
}

NSLog(@"%@",@"Success.");