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<?php
/**
* Server layer over the OAuthRequest handler
*
* @version $Id: OAuthServer.php 51 2008-10-15 15:15:47Z marcw@pobox.com $
* @author Marc Worrell <marcw@pobox.com>
* @date Nov 27, 2007 12:36:38 PM
*
*
* The MIT License
*
* Copyright (c) 2007-2008 Mediamatic Lab
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
require_once 'OAuthRequestVerifier.php';
class OAuthServer extends OAuthRequestVerifier
{
/**
* Handle the request_token request.
* Returns the new request token and request token secret.
*
* TODO: add correct result code to exception
*
* @return string returned request token, false on an error
*/
public function requestToken ()
{
OAuthRequestLogger::start($this);
try
{
$this->verify(false);
$options = array();
$ttl = $this->getParam('xoauth_token_ttl', false);
if ($ttl)
{
$options['token_ttl'] = $ttl;
}
// Create a request token
$store = OAuthStore::instance();
$token = $store->addConsumerRequestToken($this->getParam('oauth_consumer_key', true), $options);
$result = 'oauth_token='.$this->urlencode($token['token'])
.'&oauth_token_secret='.$this->urlencode($token['token_secret']);
if (!empty($token['token_ttl']))
{
$result .= '&xoauth_token_ttl='.$this->urlencode($token['token_ttl']);
}
$request_token = $token['token'];
header('HTTP/1.1 200 OK');
header('Content-Length: '.strlen($result));
header('Content-Type: application/x-www-form-urlencoded');
echo $result;
}
catch (OAuthException $e)
{
$request_token = false;
header('HTTP/1.1 401 Unauthorized');
header('Content-Type: text/plain');
echo "OAuth Verification Failed: " . $e->getMessage();
}
OAuthRequestLogger::flush();
return $request_token;
}
/**
* Verify the start of an authorization request. Verifies if the request token is valid.
* Next step is the method authorizeFinish()
*
* Nota bene: this stores the current token, consumer key and callback in the _SESSION
*
* @exception OAuthException thrown when not a valid request
* @return array token description
*/
public function authorizeVerify ( )
{
OAuthRequestLogger::start($this);
$store = OAuthStore::instance();
$token = $this->getParam('oauth_token', true);
$rs = $store->getConsumerRequestToken($token);
if (empty($rs))
{
throw new OAuthException('Unknown request token "'.$token.'"');
}
// We need to remember the callback
if ( empty($_SESSION['verify_oauth_token'])
|| strcmp($_SESSION['verify_oauth_token'], $rs['token']))
{
$_SESSION['verify_oauth_token'] = $rs['token'];
$_SESSION['verify_oauth_consumer_key'] = $rs['consumer_key'];
$_SESSION['verify_oauth_callback'] = $this->getParam('oauth_callback', true);
}
OAuthRequestLogger::flush();
return $rs;
}
/**
* Overrule this method when you want to display a nice page when
* the authorization is finished. This function does not know if the authorization was
* succesfull, you need to check the token in the database.
*
* @param boolean authorized if the current token (oauth_token param) is authorized or not
* @param int user_id user for which the token was authorized (or denied)
*/
public function authorizeFinish ( $authorized, $user_id )
{
OAuthRequestLogger::start($this);
$token = $this->getParam('oauth_token', true);
if ( isset($_SESSION['verify_oauth_token'])
&& $_SESSION['verify_oauth_token'] == $token)
{
// Flag the token as authorized, or remove the token when not authorized
$store = OAuthStore::instance();
// Fetch the referrer host from the oauth callback parameter
$referrer_host = '';
$oauth_callback = false;
if (!empty($_SESSION['verify_oauth_callback']))
{
$oauth_callback = $_SESSION['verify_oauth_callback'];
$ps = parse_url($oauth_callback);
if (isset($ps['host']))
{
$referrer_host = $ps['host'];
}
}
if ($authorized)
{
OAuthRequestLogger::addNote('Authorized token "'.$token.'" for user '.$user_id.' with referrer "'.$referrer_host.'"');
$store->authorizeConsumerRequestToken($token, $user_id, $referrer_host);
}
else
{
OAuthRequestLogger::addNote('Authorization rejected for token "'.$token.'" for user '.$user_id."\nToken has been deleted");
$store->deleteConsumerRequestToken($token);
}
if (!empty($oauth_callback))
{
$this->redirect($oauth_callback, array('oauth_token'=>rawurlencode($token)));
}
}
OAuthRequestLogger::flush();
}
/**
* Exchange a request token for an access token.
* The exchange is only succesful iff the request token has been authorized.
*
* Never returns, calls exit() when token is exchanged or when error is returned.
*/
public function accessToken ()
{
OAuthRequestLogger::start($this);
try
{
$this->verify('request');
$options = array();
$ttl = $this->getParam('xoauth_token_ttl', false);
if ($ttl)
{
$options['token_ttl'] = $ttl;
}
$store = OAuthStore::instance();
$token = $store->exchangeConsumerRequestForAccessToken($this->getParam('oauth_token', true), $options);
$result = 'oauth_token='.$this->urlencode($token['token'])
.'&oauth_token_secret='.$this->urlencode($token['token_secret']);
if (!empty($token['token_ttl']))
{
$result .= '&xoauth_token_ttl='.$this->urlencode($token['token_ttl']);
}
header('HTTP/1.1 200 OK');
header('Content-Length: '.strlen($result));
header('Content-Type: application/x-www-form-urlencoded');
echo $result;
}
catch (OAuthException $e)
{
header('HTTP/1.1 401 Access Denied');
header('Content-Type: text/plain');
echo "OAuth Verification Failed: " . $e->getMessage();
}
OAuthRequestLogger::flush();
exit();
}
}
/* vi:set ts=4 sts=4 sw=4 binary noeol: */
?>
|
