(Objective-C) Automatically Determine FTP Proxy Method

Tries each of the five possible ProxyMethod settings and returns the value (1-5) of the ProxyMethod that succeeded.

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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 = @"www.example-code.com";
ftp.Username = @"example-code.com";
ftp.Password = @"****";

ftp.ProxyHostname = @"ftp.myproxyhost.com";
ftp.ProxyPort = [NSNumber numberWithInt:21];
// Note: Your FTP Proxy server may or may not require authentication.
ftp.ProxyUsername = @"myProxyUsername";
ftp.ProxyPassword = @"myProxyPassword";

// The ProxyMethod should be an integer value between 1 and 5.
// If you know your FTP proxy server's authentication scheme,
// you may set it directly.  To determine the ProxyMethod,
// call DetermineProxyMethod.  A return value of -1 indicates a failure.
// A return value of 0 indicates that nothing worked.
// A return value of 1-5 indicates the ProxyMethod that was 
// successful, and this should be the value used for the ProxyMethod
// property.

int pMethod = [[ftp DetermineProxyMethod] intValue];
NSLog(@"%d",pMethod);

BOOL success = [ftp Disconnect];