Accessing the Twitter API via PHP

Question

I'm working on making my script mesh with OAuth instead of Basic Auth, and I'm stuck. So far, I'm just working on authenticating at the moment, but I can't get that working. This code:

<?php

  include 'config.php';
  include 'twitteroauth/twitteroauth.php';

  // Use config.php credentials
  $conn = new TwitterOAuth(CONSUMER_KEY,CONSUMER_SECRET);

  // Use application's registered callback URL
  // And get temporary credentials using made connection
  $tempCred = $conn->getRequestToken();

  // Use 'Sign in with Twitter'
  // for Redirect URL
  $rURL = $conn->getAuthorizeURL($tempCred);

  echo '<a href="'.$rURL.'">1. Click me first!</a><br />';

works just fine. However, when I make it to this step:

  // Build a new TwitterOAuth connection
  // Now that the app has verified credentials
  $conn = new TwitterOAuth(CONSUMER_KEY,
                           CONSUMER_SECRET,
                           $_SESSION['oauth_token'],
                           $_SESSION['oauth_token_secret']);

  // Get non-temporary credentials from Twitter
  $tokenCred = $conn->getAccessToken();

  echo '<a href="index.php">2. Click me next!</a><br />';

?>

I get a Page Not Available, Error 324 (net::ERR_EMPTY_RESPONSE): Unknown error. Is anyone familiar with this issue? I was following the documentation as closely as I could, but as I am a complete rookie I'm sure I made some stupid mistake.

Also, a follow up question: Once I do get my script authorizes via this process, what is my next step in terms of grabbing the friends feed xml? Can I just cURL it like before?

EDIT: The source for getAccessToken(); is as follows:

 function getAccessToken($oauth_verifier = FALSE) {
    $parameters = array();
    if (!empty($oauth_verifier)) {
      $parameters['oauth_verifier'] = $oauth_verifier;
    }
    $request = $this->oAuthRequest($this->accessTokenURL(), 'GET', $parameters);
    $token = OAuthUtil::parse_parameters($request);
    $this->token = new OAuthConsumer($token['oauth_token'], $token['oauth_token_secret']);
    return $token;
  }

Anybody? Pleaase? I've been up all night hacking at this, I need some sort of release! And yes, config.php is correct.

Answer 1

Check that CONSUMER_KEY and CONSUMER_SECRET are the same as the values in your application page on twitter.

What is the Authorisation URL returned from the method?

Answer 2

I've used this API and it worked fine for me. Nothing else comes to mind except really checking that CONSUMER_KEY and CONSUMER_SECRET, as Ian Quigley said Because you say your $_SESSION['oauth_token'] is empty, and it shouldn't be. The reason why its empty could be the wrong values in CONSUMER_KEY and CONSUMER_SECRET If you are sending wrong keys to Twitter, its not giving you those session variables you need

Just check if those values in https://twitter.com/apps (your application data) and in config.php file are identical. By default, config.php contains wrong values, you need to fill in your own.

Answer 3

I have used this api for pin based oauth authentication for twitter. I used php simple oauth library http://php.net/manual/en/book.oauth.php.

Here is the code if you want to see.

class TwitterPinBasedOauth{
    private static $requestTokenUrl = 'http://twitter.com/oauth/request_token';
    private static $accessTokenUrl = 'http://twitter.com/oauth/access_token';
    private static $authorizeUrl = 'http://twitter.com/oauth/authorize';
    private static $updateUrl = 'http://twitter.com/statuses/update.json';

    private $twitterOauth;
    public function __construct(){
        $this->twitterOauth = new OAuth(ConsumerToken::$CONSUMER_KEY,
                                        ConsumerToken::$CONSUMER_SECRET,
                                        OAUTH_SIG_METHOD_HMACSHA1,
                                        OAUTH_AUTH_TYPE_AUTHORIZATION);
    }

    public function getAndStoreRequestToken(){
        $callbackUrl = "oob";
        $response = $this->twitterOauth->getRequestToken(self::$requestTokenUrl, $callbackUrl);
        print_r("REQUEST TOKEN:\n");
        print_r($response);
        print_r(PHP_EOL);
        file_put_contents(Constants::$oauth_request_file, serialize($response));
        echo "AUTH URL:\n".self::$authorizeUrl."?oauth_token=".$response['oauth_token'].PHP_EOL;
    }
    public function getAcessToken($pin){
        $request_tokens = unserialize(file_get_contents(Constants::$oauth_request_file));
        $this->twitterOauth->setToken($request_tokens["oauth_token"],$request_tokens["oauth_token_secret"]);
        $response = $this->twitterOauth->getAccessToken(self::$accessTokenUrl, NULL, $pin);

        file_put_contents(Constants::$oauth_access_file, serialize($response));

        print_r("ACESS TOKEN:\n");
        print_r($response);
        print_r(PHP_EOL);
    }
    public function updateStatus($status){
        try{
            $access_tokens = unserialize(file_get_contents(Constants::$oauth_access_file));
            $this->twitterOauth->setToken($access_tokens["oauth_token"],$access_tokens["oauth_token_secret"]);
            $this->twitterOauth->fetch(self::$updateUrl,
                                    array('status' => $status),
                                    OAUTH_HTTP_METHOD_POST);
        }
        catch(OAuthException $e){
            error_log($e->getMessage().PHP_EOL);
            return intval($e->getCode());
        }
   }
}