oAuthRequest returns empty array - php

Question

I have created a Twitter application for a website. I would like to integrate the possibility of logging in/registering with Twitter. I am using php files as helpers, which are named TwitterOAuth.php and OAuth.php, respectively. When a user clicks on the Twitter button, he/she is redirected to a page called twitter.php, which has the following source-code:
<?php
/* Build TwitterOAuth object with client credentials. */
$connection = Common::twitter();
/* Get temporary credentials. */
$request_token = $connection->getRequestToken(App::env()->get('url'));
/* Save temporary credentials to session. */
$token = $request_token['oauth_token'];
$_SESSION['twitter'] = array('id' => $request_token['oauth_token'], 'token' => $request_token['oauth_token_secret']);
/* If last connection failed don't display authorization link. */
switch ($connection->http_code) {
case 200:
/* Build authorize URL and redirect user to Twitter. */
$url = $connection->getAuthorizeURL($token);
header('Location: ' . $url);
break;
default:
/* Show notification if something went wrong. */
var_dump($request_token);
echo 'Could not connect to Twitter. Refresh the page or try again later.';
}
The Common::twitter() function is as follows:
/**
* Returns the twitter OAuth service.
*
* #return TwitterOAuth
*/
public static function twitter() {
if (!self::$tw) {
if ((User::isLoggedIn()) && (User::current()->hasTwitterAccount())) {
self::$tw = new TwitterOAuth(
App::env()->get('twitter', 'consumerKey'),
App::env()->get('twitter', 'consumerSecret'),
App::CurrentUser()->getTwitterId(),
App::CurrentUser()->getTwitterUserAccessToken()
);
} else {
self::$tw = new TwitterOAuth(
App::env()->get('twitter', 'consumerKey'),
App::env()->get('twitter', 'consumerSecret')
);
}
}
return self::$tw;
}
In the scenario I am testing with, the else branch is executed. However, I get an exception:
Exception 'PHPErrorException' with message 'Notice [8] Undefined
index: oauth_token Error on line 81 in file ...\lib\TwitterOAuth.php
The function where the problem occurs is as follows:
/**
* Get a request_token from Twitter
*
* #returns a key/value array containing oauth_token and oauth_token_secret
*/
function getRequestToken($oauth_callback) {
$parameters = array();
$parameters['oauth_callback'] = $oauth_callback;
$request = $this->oAuthRequest($this->requestTokenURL(), 'GET', $parameters);
$token = OAuthUtil::parse_parameters($request);
$this->token = new OAuthConsumer($token['oauth_token'], $token['oauth_token_secret']);
return $token;
}
The problem is that OAuthUtil::parse_parameters($request) returns an empty array. This is happening, because $request is false, however, $this->requestTokenURL is https://api.twitter.com/oauth/request_token, $parameters has an oauth_callback, which holds the callback URL defined in the Twitter application. What could be the cause of this issue?
EDIT:
Source of `$this->oAuthRequest`:
/**
* Format and sign an OAuth / API request
*/
function oAuthRequest($url, $method, $parameters) {
if (strrpos($url, 'https://') !== 0 && strrpos($url, 'http://') !== 0) {
$url = "{$this->host}{$url}.{$this->format}";
}
$request = OAuthRequest::from_consumer_and_token($this->consumer, $this->token, $method, $url, $parameters);
$request->sign_request($this->sha1_method, $this->consumer, $this->token);
switch ($method) {
case 'GET':
return $this->http($request->to_url(), 'GET');
default:
return $this->http($request->get_normalized_http_url(), $method, $request->to_postdata());
}
}
This method is inside of TwitterOAuth.php.

Answer 1

In OAuth.php there was a code chunk in the get_normalized_http_url method, namely:
$port = #$parts['port'];
This caused some errors, so I have fixed it like this:
$port = (array_key_exists('port', $parts) ? $parts['port'] : 80);
However, apparently port number 80 was the problem and after I changed the chunk to this:
$port = (array_key_exists('port', $parts) ? $parts['port'] : 443);
it worked like a spell.