(Java) 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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import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

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

    CkHttp http = new CkHttp();

    http.put_OAuth1(true);
    http.put_OAuthConsumerKey("my-consumer-key");
    http.put_OAuthConsumerSecret("my-consumer-secret");

    CkHttpRequest req = new CkHttpRequest();
    req.put_HttpVerb("POST");
    req.put_ContentType("application/x-www-form-urlencoded");

    CkHttpResponse resp = new CkHttpResponse();
    success = http.HttpReq("https://api.twitter.com/oauth/request_token",req,resp);
    if (success == false) {
        System.out.println(http.lastErrorText());
        return;
        }

    if (resp.get_StatusCode() == 200) {

        String oauthToken = resp.urlEncParamValue(resp.bodyStr(),"oauth_token");
        System.out.println("OAuth temporary request token = " + oauthToken);

        String oauthTokenSecret = resp.urlEncParamValue(resp.bodyStr(),"oauth_token_secret");
        System.out.println("OAuth temporary token secret = " + oauthTokenSecret);

        String oauthCbConfirmed = resp.urlEncParamValue(resp.bodyStr(),"oauth_callback_confirmed");
        System.out.println("OAuth callback confirmed  = " + 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 {
        System.out.println(http.lastErrorText());
        }
  }
}