(C) Twitter PIN-Based Authorization (Step 1)

Demonstrates the 1st step in Twitter PIN-based authorization using OAuth. The purpose of this step is to obtain a temporary request token that will be traded for an access token + secret in the final step. Once the access token + secret is obtained, the application can access the Twitter account in whatever ways it was authorized.

Note: This example requires Chilkat v11.0.0 or greater.

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#include <C_CkHttp.h>
#include <C_CkHttpRequest.h>
#include <C_CkHttpResponse.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkHttp http;
    HCkHttpRequest req;
    HCkHttpResponse resp;
    const char *oauthToken;
    const char *oauthTokenSecret;
    const char *oauthCbConfirmed;

    success = FALSE;

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

    http = CkHttp_Create();

    CkHttp_putOAuth1(http,TRUE);
    CkHttp_putOAuthConsumerKey(http,"my-consumer-key");
    CkHttp_putOAuthConsumerSecret(http,"my-consumer-secret");

    req = CkHttpRequest_Create();
    CkHttpRequest_putHttpVerb(req,"POST");
    CkHttpRequest_putContentType(req,"application/x-www-form-urlencoded");

    resp = CkHttpResponse_Create();
    success = CkHttp_HttpReq(http,"https://api.twitter.com/oauth/request_token",req,resp);
    if (success == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        CkHttpResponse_Dispose(resp);
        return;
    }

    if (CkHttpResponse_getStatusCode(resp) == 200) {

        oauthToken = CkHttpResponse_urlEncParamValue(resp,CkHttpResponse_bodyStr(resp),"oauth_token");
        printf("OAuth temporary request token = %s\n",oauthToken);

        oauthTokenSecret = CkHttpResponse_urlEncParamValue(resp,CkHttpResponse_bodyStr(resp),"oauth_token_secret");
        printf("OAuth temporary token secret = %s\n",oauthTokenSecret);

        oauthCbConfirmed = CkHttpResponse_urlEncParamValue(resp,CkHttpResponse_bodyStr(resp),"oauth_callback_confirmed");
        printf("OAuth callback confirmed  = %s\n",oauthCbConfirmed);

        // At this point, the end-user needs to browse to the following
        // Twitter URL to log in to his/her Twitter account and get a PIN.
        // 
        // https://api.twitter.com/oauth/authenticate?oauth_token=OAUTH_TOKEN
        // 
        // (where OAUTH_TOKEN is replaced with the contents
        // of the OAuth temporary request token.)

        // Your application may have an embedded browser such
        // that it automatically navigates to the above URL, or it may
        // be necessary for the user to browse to this URL independently.

        // Once the PIN is obtained, your application should provide a means
        // for the end-user to enter it (by typing it into an input text box, for example), 
        // and then Step 2 (the final step) can begin.

    }
    else {
        printf("%s\n",CkHttp_lastErrorText(http));
    }



    CkHttp_Dispose(http);
    CkHttpRequest_Dispose(req);
    CkHttpResponse_Dispose(resp);

    }