(Objective-C) Twitter - Application Only Authentication

Demonstrates how to get a Twitter OAuth2 token for application-only authentication.

This example is deprecated and no longer valid.

Chilkat Objective-C Library Downloads MAC OS X (Cocoa) Libs iOS Libs

#import <NSString.h>
#import <CkoHttp.h>
#import <CkoHttpRequest.h>
#import <CkoHttpResponse.h>
#import <CkoJsonObject.h>

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

// Note: Define your Twitter apps at https://apps.twitter.com/

// We're going to send an HTTPS POST that looks like this:

// POST /oauth2/token HTTP/1.1
// Host: api.twitter.com
// User-Agent: My Twitter App v1.0.23
// Authorization: Basic eHZ6MWV2RlM0d0VFUFRHRUZQSEJvZzpMOHFxOVBaeVJn
//                      NmllS0dFS2hab2xHQzB2SldMdzhpRUo4OERSZHlPZw==
// Content-Type: application/x-www-form-urlencoded;charset=UTF-8
// Content-Length: 29
// Accept-Encoding: gzip
// 
// grant_type=client_credentials

// Update these values with your consumer key and secret (also known as API key and API secret).
NSString *consumerKey = @"TWITTER_CONSUMER_KEY";
NSString *consumerSecret = @"TWITTER_CONSUMER_SECRET";

CkoHttp *http = [[CkoHttp alloc] init];

http.BasicAuth = YES;
http.Login = consumerKey;
http.Password = consumerSecret;

CkoHttpRequest *req = [[CkoHttpRequest alloc] init];
[req AddParam: @"grant_type" value: @"client_credentials"];

CkoHttpResponse *resp = [http PostUrlEncoded: @"https://api.twitter.com/oauth2/token" req: req];
if (http.LastMethodSuccess != YES) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

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

if ([resp.StatusCode intValue] != 200) {
    NSLog(@"%@",@"Expected a 200 response status code for success.");
    NSLog(@"%@",resp.BodyStr);
    return;
}

// We should get a JSON response like this:

// {
//     "token_type":"bearer",
//     "access_token":"..."
// }

CkoJsonObject *json = [[CkoJsonObject alloc] init];
[json Load: resp.BodyStr];

NSLog(@"%@%@",@"Access token = ",[json StringOf: @"access_token"]);