1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
<?php
/**
* Laconica, the distributed open-source microblogging tool
*
* Class for doing OAuth authentication against Twitter
*
* PHP version 5
*
* LICENCE: This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @category Twitter
* @package Laconica
* @author Zach Copely <zach@controlyourself.ca>
* @copyright 2009 Control Yourself, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://laconi.ca/
*/
if (!defined('LACONICA')) {
exit(1);
}
/**
* Class for doing OAuth authentication against Twitter
*
* Peforms the OAuth "dance" between Laconica and Twitter -- requests a token,
* authorizes it, and exchanges it for an access token. It also creates a link
* (Foreign_link) between the Laconica user and Twitter user and stores the
* access token and secret in the link.
*
* @category Twitter
* @package Laconica
* @author Zach Copley <zach@controlyourself.ca>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://laconi.ca/
*
*/
class TwitterauthorizationAction extends Action
{
/**
* Initialize class members. Looks for 'oauth_token' parameter.
*
* @param array $args misc. arguments
*
* @return boolean true
*/
function prepare($args)
{
parent::prepare($args);
$this->oauth_token = $this->arg('oauth_token');
return true;
}
/**
* Handler method
*
* @param array $args is ignored since it's now passed in in prepare()
*
* @return nothing
*/
function handle($args)
{
parent::handle($args);
if (!common_logged_in()) {
$this->clientError(_('Not logged in.'), 403);
}
$user = common_current_user();
$flink = Foreign_link::getByUserID($user->id, TWITTER_SERVICE);
// If there's already a foreign link record, it means we already
// have an access token, and this is unecessary. So go back.
if (isset($flink)) {
common_redirect(common_local_url('twittersettings'));
}
// $this->oauth_token is only populated once Twitter authorizes our
// request token. If it's empty we're at the beginning of the auth
// process
if (empty($this->oauth_token)) {
$this->authorizeRequestToken();
} else {
$this->saveAccessToken();
}
}
/**
* Asks Twitter for a request token, and then redirects to Twitter
* to authorize it.
*
* @return nothing
*/
function authorizeRequestToken()
{
try {
// Get a new request token and authorize it
$client = new TwitterOAuthClient();
$req_tok =
$client->getRequestToken(TwitterOAuthClient::$requestTokenURL);
// Sock the request token away in the session temporarily
$_SESSION['twitter_request_token'] = $req_tok->key;
$_SESSION['twitter_request_token_secret'] = $req_tok->secret;
$auth_link = $client->getAuthorizeLink($req_tok);
} catch (TwitterOAuthClientException $e) {
$msg = sprintf('OAuth client cURL error - code: %1s, msg: %2s',
$e->getCode(), $e->getMessage());
$this->serverError(_('Couldn\'t link your Twitter account.'));
}
common_redirect($auth_link);
}
/**
* Called when Twitter returns an authorized request token. Exchanges
* it for an access token and stores it.
*
* @return nothing
*/
function saveAccessToken()
{
// Check to make sure Twitter returned the same request
// token we sent them
if ($_SESSION['twitter_request_token'] != $this->oauth_token) {
$this->serverError(_('Couldn\'t link your Twitter account.'));
}
try {
$client = new TwitterOAuthClient($_SESSION['twitter_request_token'],
$_SESSION['twitter_request_token_secret']);
// Exchange the request token for an access token
$atok = $client->getAccessToken(TwitterOAuthClient::$accessTokenURL);
// Test the access token and get the user's Twitter info
$client = new TwitterOAuthClient($atok->key, $atok->secret);
$twitter_user = $client->verifyCredentials();
} catch (OAuthClientException $e) {
$msg = sprintf('OAuth client cURL error - code: %1$s, msg: %2$s',
$e->getCode(), $e->getMessage());
$this->serverError(_('Couldn\'t link your Twitter account.'));
}
// Save the access token and Twitter user info
$this->saveForeignLink($atok, $twitter_user);
// Clean up the the mess we made in the session
unset($_SESSION['twitter_request_token']);
unset($_SESSION['twitter_request_token_secret']);
common_redirect(common_local_url('twittersettings'));
}
/**
* Saves a Foreign_link between Twitter user and local user,
* which includes the access token and secret.
*
* @param OAuthToken $access_token the access token to save
* @param mixed $twitter_user twitter API user object
*
* @return nothing
*/
function saveForeignLink($access_token, $twitter_user)
{
$user = common_current_user();
$flink = new Foreign_link();
$flink->user_id = $user->id;
$flink->foreign_id = $twitter_user->id;
$flink->service = TWITTER_SERVICE;
$creds = TwitterOAuthClient::packToken($access_token);
$flink->credentials = $creds;
$flink->created = common_sql_now();
// Defaults: noticesync on, everything else off
$flink->set_flags(true, false, false, false);
$flink_id = $flink->insert();
if (empty($flink_id)) {
common_log_db_error($flink, 'INSERT', __FILE__);
$this->serverError(_('Couldn\'t link your Twitter account.'));
}
save_twitter_user($twitter_user->id, $twitter_user->screen_name);
}
}
|
