Kohana 3 - OAuth & Twitter Example

twitter.php

<?php

  class Controller_Twitter extends Controller {

    public function action_index () {

      // Load a consumer from config file.
      $consumer = OAuth_Consumer::factory( Kohana::config( 'oauth.twitter' ) );

      // Check if we already have an access token in the session.
      $access_token = Session::instance()->get( 'oauth_access_token', null );

      if( is_null( $access_token ) ) {

        // We need to set the callback to action_callback.  This can also be done in the config file.
        $consumer->callback( URL::site( Route::get( 'default' )->uri( array( 'controller' => 'twitter', 'action' => 'callback' ) ) ) );

        // The provider actually makes the requests
        $provider = OAuth_Provider::factory( 'twitter' );

        $request_token = $provider->request_token( $consumer );
      
        Session::instance()->set( 'oauth_token', $request_token );
        
        // Once we have the request token, we redirect to Twitter to confirm.
        Request::current()->redirect( $provider->authorize_url( $request_token ) );
      }
      else {
        // Now that we have a valid access token, we can make authorized API requests
        $t = Twitter::factory( 'account' );
        $this->response->body( var_export( $t->verify_credentials( $consumer, $access_token ) ); 
      }
    }

    public function action_callback () {
    
      // Pull our request token out of the session. We use get_once because request tokens are single use
      $request_token = Session::instance()->get_once( 'oauth_token' );
      
      // Add the verifier from the query parameters
      $request_token->verifier( Request::current()->query( 'oauth_verifier' ) );

      // Rebuild the consumer and provider
      $consumer = OAuth_Consumer::factory( Kohana::config( 'oauth.twitter' ) );
      $provider = OAuth_Provider::factory( 'twitter' );

      // Exchange the request token for a longer term access token
      $access_token = $provider->access_token( $consumer, $request_token );

      Session::instance()->set( 'oauth_access_token', $access_token );
      
      Request::current()->redirect( Route::get( 'default' )->uri( array( 'controller' => 'twitter' ) ) );
    }

  }

/*
  Example output of action_index once it is Twitter authorized:
  
	object(stdClass)#55 (39) {
    ["id_str"]=>
    string(7) "6116372"
    ["profile_link_color"]=>
    string(6) "0ae000"
    ["protected"]=>
    bool(false)
    ["url"]=>
    string(27) "http://www.velvetcache.org/"
    ["profile_image_url_https"]=>
    string(64) "https://si0.twimg.com/profile_images/732683067/avatar_normal.png"
    ["screen_name"]=>
    string(7) "jmhobbs"
    ["profile_image_url"]=>
    string(62) "http://a2.twimg.com/profile_images/732683067/avatar_normal.png"
    ["name"]=>
    string(10) "John Hobbs"
    ["listed_count"]=>
    int(21)
    ["profile_background_color"]=>
    string(6) "ffffff"
    ["lang"]=>
    string(2) "en"
    ["profile_background_tile"]=>
    bool(true)
    ["utc_offset"]=>
    int(-21600)
    ["description"]=>
    string(85) "Bit Conservationist.

  I Love Omaha. I Love Code.  I make fancy websites @whatcheer."
    ["show_all_inline_media"]=>
    bool(false)
    ["contributors_enabled"]=>
    bool(false)
    ["created_at"]=>
    string(30) "Thu May 17 18:38:22 +0000 2007"
    ["profile_sidebar_fill_color"]=>
    string(6) "e6e6e6"
    ["default_profile"]=>
    bool(false)
    ["statuses_count"]=>
    int(1187)
    ["followers_count"]=>
    int(247)
    ["status"]=>
    object(stdClass)#56 (19) {
      ["id_str"]=>
      string(18) "121822869910077441"
      ["retweet_count"]=>
      int(0)
      ["in_reply_to_screen_name"]=>
      NULL
      ["in_reply_to_user_id"]=>
      NULL
      ["truncated"]=>
      bool(false)
      ["retweeted"]=>
      bool(false)
      ["possibly_sensitive"]=>
      bool(false)
      ["in_reply_to_status_id_str"]=>
      NULL
      ["geo"]=>
      NULL
      ["place"]=>
      NULL
      ["coordinates"]=>
      NULL
      ["created_at"]=>
      string(30) "Thu Oct 06 05:43:30 +0000 2011"
      ["in_reply_to_user_id_str"]=>
      NULL
      ["contributors"]=>
      NULL
      ["source"]=>
      string(3) "web"
      ["in_reply_to_status_id"]=>
      NULL
      ["favorited"]=>
      bool(false)
      ["id"]=>
      int(121822869910077441)
      ["text"]=>
      string(106) "Steve Jobs died today.  So did 4,000 children from water related diseases. #justsayin http://t.co/XCJJnUaJ"
    }
    ["default_profile_image"]=>
    bool(false)
    ["time_zone"]=>
    string(26) "Central Time (US & Canada)"
    ["favourites_count"]=>
    int(286)
    ["profile_sidebar_border_color"]=>
    string(6) "000000"
    ["is_translator"]=>
    bool(false)
    ["following"]=>
    NULL
    ["geo_enabled"]=>
    bool(false)
    ["notifications"]=>
    NULL
    ["profile_use_background_image"]=>
    bool(true)
    ["profile_background_image_url_https"]=>
    string(72) "https://si0.twimg.com/profile_background_images/330137786/1-SEAMLESS.jpg"
    ["follow_request_sent"]=>
    NULL
    ["verified"]=>
    bool(false)
    ["friends_count"]=>
    int(194)
    ["profile_text_color"]=>
    string(6) "000000"
    ["location"]=>
    string(9) "Omaha, NE"
    ["id"]=>
    int(6116372)
    ["profile_background_image_url"]=>
    string(70) "http://a2.twimg.com/profile_background_images/330137786/1-SEAMLESS.jpg"
  }
*/