Sample code for 30+ languages & platforms
Objective-C Requires Chilkat v11.0.0+

Example: Http.HttpStr method

Shows how to use the HttpStr method to send an HTTP POST request with the text of a string as the request body. The example sends the following request:
POST /echo_request_body.asp HTTP/1.1
Host: chilkatsoft.com
Accept: */*
Accept-Encoding: gzip
Content-Type: application/json
Content-Length: 26

{"greeting":"Hello World"}

Also see: Chilkat Http Default and Auto-Filled Headers

Chilkat Objective-C Downloads

Objective-C
#import <CkoHttp.h>
#import <NSString.h>
#import <CkoHttpResponse.h>

BOOL success = NO;

CkoHttp *http = [[CkoHttp alloc] init];
success = NO;

NSString *requestBody = @"{\"greeting\":\"Hello World\"}";

//  This URL echoes the contents of the request body, letting us view it.
NSString *url = @"https://chilkatsoft.com/echo_request_body.asp";

//  Send a POST with the contents of the string in the HTTP request body.
CkoHttpResponse *resp = [[CkoHttpResponse alloc] init];
success = [http HttpStr: @"POST" url: url bodyStr: requestBody charset: @"utf-8" contentType: @"application/json" response: resp];
if (success == NO) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

NSLog(@"%@%d",@"Response Status Code: ",[resp.StatusCode intValue]);

//  Examine the request we sent.
//  The LastHeader property stores the HTTP request header of the most recent request sent,
//  and in this instance, the response body mirrors the request body.
NSLog(@"%@",http.LastHeader);
NSLog(@"%@",resp.BodyStr);

//  Output:

//  POST /echo_request_body.asp HTTP/1.1
//  Host: chilkatsoft.com
//  Accept: */*
//  Accept-Encoding: gzip
//  Content-Type: application/json
//  Content-Length: 26
//  
//  {"greeting":"Hello World"}