Write Bytes to a Remote SFTP File (BinData)

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Demonstrates the Chilkat SFtp.WriteFileBd method, which appends all bytes in a BinData to the remote file identified by an open handle. The first argument is the handle and the second is the BinData.

Note: This example uses a relative local path, which is resolved against the application's current working directory. Absolute local paths may also be used. Supply the path appropriate to your own environment.

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

BOOL success = NO;

//  Demonstrates the SFtp.WriteFileBd method, which appends all bytes in a BinData to the remote
//  file identified by an open handle.  The 1st argument is the handle and the 2nd is the BinData.

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

//  Connect, authenticate, and initialize the SFTP subsystem.
int port = 22;
success = [sftp Connect: @"sftp.example.com" port: [NSNumber numberWithInt: port]];
if (success == NO) {
    NSLog(@"%@",sftp.LastErrorText);
    return;
}

//  Normally you would not hard-code the password in source.  You should instead obtain it
//  from an interactive prompt, environment variable, or a secrets vault.
NSString *password = @"mySshPassword";

success = [sftp AuthenticatePw: @"mySshLogin" password: password];
if (success == NO) {
    NSLog(@"%@",sftp.LastErrorText);
    return;
}

success = [sftp InitializeSftp];
if (success == NO) {
    NSLog(@"%@",sftp.LastErrorText);
    return;
}

//  Open (creating/truncating) the remote file for writing.
NSString *handle = [sftp OpenFile: @"subdir/image.png" access: @"writeOnly" createDisp: @"createTruncate"];
if (sftp.LastMethodSuccess == NO) {
    NSLog(@"%@",sftp.LastErrorText);
    return;
}

//  Put the bytes to write into a BinData.  (Here they are loaded from a local file, but the
//  bytes could come from anywhere.)
CkoBinData *bd = [[CkoBinData alloc] init];
success = [bd LoadFile: @"qa_data/image.png"];
if (success == NO) {
    NSLog(@"%@",bd.LastErrorText);
    return;
}

//  Append the BinData bytes to the open remote file.
success = [sftp WriteFileBd: handle bd: bd];
if (success == NO) {
    NSLog(@"%@",sftp.LastErrorText);
    return;
}

success = [sftp CloseHandle: handle];
if (success == NO) {
    NSLog(@"%@",sftp.LastErrorText);
    return;
}

NSLog(@"%@%d%@",@"Wrote ",[bd.NumBytes intValue],@" bytes.");

[sftp Disconnect];