iphone http communication

Hello everyone, I am new to iphone soon, now have a http communication task.
Would like to ask you a master, to achieve http what kind?
Can you put the sample source code?
Thank you. .
Reply:

 / / prepar request 
NSString * urlString = [NSString stringWithFormat: @ "http://urlToSend.com"]; 
NSMutableURLRequest * request = [[[NSMutableURLRequest alloc] init] autorelease]; 
[Request setURL: [NSURL URLWithString: urlString]]; 
[Request setHTTPMethod: @ "POST"]; 

/ / Set headers 
NSString * contentType = [NSString stringWithFormat: @ "text / xml"]; 
[Request addValue: contentType forHTTPHeaderField: @ "Content-Type"]; 

/ / Create the body 
NSMutableData * postBody = [NSMutableData data]; 
[PostBody appendData: [[NSString stringWithFormat: @ ""] dataUsingEncoding: NSUTF8StringEncoding]]; 
[PostBody appendData: [[NSString stringWithFormat: @ ""] dataUsingEncoding: NSUTF8StringEncoding]]; 
[PostBody appendData: [[NSString stringWithFormat: @ ""] dataUsingEncoding: NSUTF8StringEncoding]]; 

/ / Post 
[Request setHTTPBody: postBody]; 

/ / Get response 
NSHTTPURLResponse * urlResponse = nil; 
NSError * error = [[NSError alloc] init]; 
NSData * responseData = [NSURLConnection sendSynchronousRequest: request returningResponse: & urlResponse error: & error]; 
NSString * result = [[NSString alloc] initWithData: responseData encoding: NSUTF8StringEncoding]; 
NSLog (@ "Response Code:% d", [urlResponse statusCode]); 
if ([urlResponse statusCode]> = 200 && [urlResponse statusCode] <300) {
NSLog (@ "Response:% @", result); 

/ / Here you get the response 

} 

Reply:
Thank you. . . . .
Reply:

cited a floor cloudhsu reply:

C / C + + code
/ / Prepar request
NSString * urlString = [NSString stringWithFormat: @ "http://urlToSend.com"];
NSMutableURLRequest * request = [[[NSMutableURLRequest alloc] init] autorelease];
......

Is so grateful!