From 6f4b2f0ac2f235332c850b050d9e4563fc71f89d Mon Sep 17 00:00:00 2001
From: Zach Copley <zach@controlyourself.ca>
Date: Sat, 1 Aug 2009 08:20:44 +0000
Subject: Twitter OAuth server dance working

---
 lib/common.php             |   3 ++
 lib/router.php             |   4 ++
 lib/twitteroauthclient.php | 109 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 116 insertions(+)
 create mode 100644 lib/twitteroauthclient.php

(limited to 'lib')

diff --git a/lib/common.php b/lib/common.php
index 9d7954fa9..f9ac66f4f 100644
--- a/lib/common.php
+++ b/lib/common.php
@@ -196,6 +196,9 @@ $config =
         'integration' =>
         array('source' => 'Laconica', # source attribute for Twitter
               'taguri' => $_server.',2009'), # base for tag URIs
+	'twitter' =>
+	array('consumer_key'    => null,
+	      'consumer_secret' => null),
         'memcached' =>
         array('enabled' => false,
               'server' => 'localhost',
diff --git a/lib/router.php b/lib/router.php
index e10d484f4..582dfae6d 100644
--- a/lib/router.php
+++ b/lib/router.php
@@ -88,6 +88,10 @@ class Router
 
         $m->connect('doc/:title', array('action' => 'doc'));
 
+        // Twitter
+
+        $m->connect('twitter/authorization', array('action' => 'twitterauthorization'));
+
         // facebook
 
         $m->connect('facebook', array('action' => 'facebookhome'));
diff --git a/lib/twitteroauthclient.php b/lib/twitteroauthclient.php
new file mode 100644
index 000000000..616fbc213
--- /dev/null
+++ b/lib/twitteroauthclient.php
@@ -0,0 +1,109 @@
+<?php
+
+require_once('OAuth.php');
+
+class TwitterOAuthClient
+{
+    public static $requestTokenURL = 'https://twitter.com/oauth/request_token';
+    public static $authorizeURL    = 'https://twitter.com/oauth/authorize';
+    public static $accessTokenURL  = 'https://twitter.com/oauth/access_token';
+
+    function __construct($oauth_token = null, $oauth_token_secret = null)
+    {
+        $this->sha1_method = new OAuthSignatureMethod_HMAC_SHA1();
+        $consumer_key    = common_config('twitter', 'consumer_key');
+        $consumer_secret = common_config('twitter', 'consumer_secret');
+        $this->consumer = new OAuthConsumer($consumer_key, $consumer_secret);
+        $this->token = null;
+
+        if (isset($oauth_token) && isset($oauth_token_secret)) {
+            $this->token = new OAuthToken($oauth_token, $oauth_token_secret);
+        }
+    }
+
+    function getRequestToken()
+    {
+        $response = $this->oAuthGet(TwitterOAuthClient::$requestTokenURL);
+        parse_str($response);
+        $token = new OAuthToken($oauth_token, $oauth_token_secret);
+        return $token;
+    }
+
+    function getAuthorizeLink($request_token)
+    {
+        // Not sure Twitter actually looks at oauth_callback
+
+        return TwitterOAuthClient::$authorizeURL .
+        '?oauth_token=' . $request_token->key . '&oauth_callback=' .
+        urlencode(common_local_url('twitterauthorization'));
+    }
+
+    function getAccessToken()
+    {
+        $response = $this->oAuthPost(TwitterOAuthClient::$accessTokenURL);
+        parse_str($response);
+        $token = new OAuthToken($oauth_token, $oauth_token_secret);
+        return $token;
+    }
+
+    function verify_credentials()
+    {
+        $url = 'https://twitter.com/account/verify_credentials.json';
+        $response = $this->oAuthGet($url);
+        $twitter_user = json_decode($response);
+        return $twitter_user;
+    }
+
+    function oAuthGet($url)
+    {
+        $request = OAuthRequest::from_consumer_and_token($this->consumer,
+            $this->token, 'GET', $url, null);
+        $request->sign_request($this->sha1_method,
+            $this->consumer, $this->token);
+
+        return $this->httpRequest($request->to_url());
+    }
+
+    function oAuthPost($url, $params = null)
+    {
+        $request = OAuthRequest::from_consumer_and_token($this->consumer,
+            $this->token, 'POST', $url, $params);
+        $request->sign_request($this->sha1_method,
+            $this->consumer, $this->token);
+
+        return $this->httpRequest($request->get_normalized_http_url(),
+            $request->to_postdata());
+    }
+
+    function httpRequest($url, $params = null)
+    {
+        $options = array(
+            CURLOPT_RETURNTRANSFER => true,
+            CURLOPT_FAILONERROR    => true,
+            CURLOPT_HEADER         => false,
+            CURLOPT_FOLLOWLOCATION => true,
+            CURLOPT_USERAGENT      => 'Laconica',
+            CURLOPT_CONNECTTIMEOUT => 120,
+            CURLOPT_TIMEOUT        => 120,
+            CURLOPT_HTTPAUTH       => CURLAUTH_ANY,
+            CURLOPT_SSL_VERIFYPEER => false,
+
+            // Twitter is strict about accepting invalid "Expect" headers
+
+            CURLOPT_HTTPHEADER => array('Expect:')
+            );
+
+            if (isset($params)) {
+                $options[CURLOPT_POST] = true;
+                $options[CURLOPT_POSTFIELDS] = $params;
+            }
+
+            $ch = curl_init($url);
+            curl_setopt_array($ch, $options);
+            $response = curl_exec($ch);
+            curl_close($ch);
+
+            return $response;
+    }
+
+}
-- 
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