(Unicode 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This example is deprecated and no longer valid.

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#include <CkHttpW.h>
#include <CkHttpRequestW.h>
#include <CkHttpResponseW.h>
#include <CkJsonObjectW.h>

void ChilkatSample(void)
    {
    // 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).
    const wchar_t *consumerKey = L"TWITTER_CONSUMER_KEY";
    const wchar_t *consumerSecret = L"TWITTER_CONSUMER_SECRET";

    CkHttpW http;

    http.put_BasicAuth(true);
    http.put_Login(consumerKey);
    http.put_Password(consumerSecret);

    CkHttpRequestW req;
    req.AddParam(L"grant_type",L"client_credentials");

    CkHttpResponseW *resp = http.PostUrlEncoded(L"https://api.twitter.com/oauth2/token",req);
    if (http.get_LastMethodSuccess() != true) {
        wprintf(L"%s\n",http.lastErrorText());
        return;
    }

    wprintf(L"Response Status Code: %d\n",resp->get_StatusCode());

    if (resp->get_StatusCode() != 200) {
        wprintf(L"Expected a 200 response status code for success.\n");
        wprintf(L"%s\n",resp->bodyStr());
        return;
    }

    // We should get a JSON response like this:

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

    CkJsonObjectW json;
    json.Load(resp->bodyStr());

    wprintf(L"Access token = %s\n",json.stringOf(L"access_token"));

    delete resp;
    }