(Objective-C) TCP Socket Connect through HTTP Proxy

Demonstrates how to connect through an HTTP proxy server.

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#import <CkoSocket.h>
#import <NSString.h>

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

CkoSocket *socket = [[CkoSocket alloc] init];

// To connect through an HTTP proxy, set the HttpProxyHostname
// and HttpProxyPort properties to the hostname (or IP address)
// and port of the HTTP proxy.  Typical port numbers used by
// HTTP proxy servers are 3128 and 8080.
socket.HttpProxyHostname = @"www.my-http-proxy.com";
socket.HttpProxyPort = [NSNumber numberWithInt:3128];

// Important:  Your HTTP proxy server must allow non-HTTP
// traffic to pass.  Otherwise this does not work.

// Connect (via the HTTP proxy) to port 5555 of 192.168.1.108.
// hostname may be a domain name or IP address.
NSString *hostname = @"192.168.1.108";
BOOL ssl = NO;
int maxWaitMillisec = 20000;
BOOL success = [socket Connect: hostname port: [NSNumber numberWithInt: 5555] ssl: ssl maxWaitMs: [NSNumber numberWithInt: maxWaitMillisec]];
if (success != YES) {
    NSLog(@"%@",socket.LastErrorText);
    return;
}

// Set maximum timeouts for reading an writing (in millisec)
socket.MaxReadIdleMs = [NSNumber numberWithInt:10000];
socket.MaxSendIdleMs = [NSNumber numberWithInt:10000];

// The ficticious server (in this example) is going to send a "Hello World!" 
// message.  Read it:
NSString *receivedMsg = [socket ReceiveString];
if (socket.LastMethodSuccess != YES) {
    NSLog(@"%@",socket.LastErrorText);
    return;
}

// Close the connection with the server
// Wait a max of 20 seconds (20000 millsec)
success = [socket Close: [NSNumber numberWithInt: 20000]];

NSLog(@"%@",receivedMsg);