/**
  * Class handler.
  *
  * @param array $args array of arguments
  *
  * @return void
  */
 function handle($args)
 {
     parent::handle($args);
     $datastore = new ApiStatusNetOAuthDataStore();
     $server = new OAuthServer($datastore);
     $hmac_method = new OAuthSignatureMethod_HMAC_SHA1();
     $server->add_signature_method($hmac_method);
     $atok = $app = null;
     // XXX: Insist that oauth_token and oauth_verifier be populated?
     // Spec doesn't say they MUST be.
     try {
         $req = OAuthRequest::from_request();
         $this->reqToken = $req->get_parameter('oauth_token');
         $this->verifier = $req->get_parameter('oauth_verifier');
         $app = $datastore->getAppByRequestToken($this->reqToken);
         $atok = $server->fetch_access_token($req);
     } catch (Exception $e) {
         common_log(LOG_WARNING, 'API OAuthException - ' . $e->getMessage());
         common_debug(var_export($req, true));
         $code = $e->getCode();
         $this->clientError($e->getMessage(), empty($code) ? 401 : $code, 'text');
         return;
     }
     if (empty($atok)) {
         // Token exchange failed -- log it
         $msg = sprintf('API OAuth - Failure exchanging OAuth request token for access token, ' . 'request token = %s, verifier = %s', $this->reqToken, $this->verifier);
         common_log(LOG_WARNING, $msg);
         // TRANS: Client error given from the OAuth API when the request token or verifier is invalid.
         $this->clientError(_('Invalid request token or verifier.'), 400, 'text');
     } else {
         common_log(LOG_INFO, sprintf("Issued access token '%s' for application %d (%s).", $atok->key, $app->id, $app->name));
         $this->showAccessToken($atok);
     }
 }