Unicode C Requires Chilkat v11.0.0+

Twitter - Application Only Authentication

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

This example is deprecated and no longer valid.

Unicode C

#include <C_CkHttpW.h>
#include <C_CkHttpRequestW.h>
#include <C_CkHttpResponseW.h>
#include <C_CkJsonObjectW.h>

void ChilkatSample(void)
    {
    BOOL success;
    const wchar_t *consumerKey;
    const wchar_t *consumerSecret;
    HCkHttpW http;
    HCkHttpRequestW req;
    HCkHttpResponseW resp;
    HCkJsonObjectW json;

    success = FALSE;

    //  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).
    consumerKey = L"TWITTER_CONSUMER_KEY";
    consumerSecret = L"TWITTER_CONSUMER_SECRET";

    http = CkHttpW_Create();

    CkHttpW_putBasicAuth(http,TRUE);
    CkHttpW_putLogin(http,consumerKey);
    CkHttpW_putPassword(http,consumerSecret);

    req = CkHttpRequestW_Create();
    CkHttpRequestW_AddParam(req,L"grant_type",L"client_credentials");

    CkHttpRequestW_putHttpVerb(req,L"POST");
    CkHttpRequestW_putContentType(req,L"application/x-www-form-urlencoded");

    resp = CkHttpResponseW_Create();
    success = CkHttpW_HttpReq(http,L"https://api.twitter.com/oauth2/token",req,resp);
    if (success == FALSE) {
        wprintf(L"%s\n",CkHttpW_lastErrorText(http));
        CkHttpW_Dispose(http);
        CkHttpRequestW_Dispose(req);
        CkHttpResponseW_Dispose(resp);
        return;
    }

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

    if (CkHttpResponseW_getStatusCode(resp) != 200) {
        wprintf(L"Expected a 200 response status code for success.\n");
        wprintf(L"%s\n",CkHttpResponseW_bodyStr(resp));
        CkHttpW_Dispose(http);
        CkHttpRequestW_Dispose(req);
        CkHttpResponseW_Dispose(resp);
        return;
    }

    //  We should get a JSON response like this:

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

    json = CkJsonObjectW_Create();
    CkJsonObjectW_Load(json,CkHttpResponseW_bodyStr(resp));

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


    CkHttpW_Dispose(http);
    CkHttpRequestW_Dispose(req);
    CkHttpResponseW_Dispose(resp);
    CkJsonObjectW_Dispose(json);

    }