summaryrefslogtreecommitdiff
path: root/actions/finishremotesubscribe.php
blob: d54c29a60365df22235bc0db9286a79b53becb00 (plain)
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
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
<?php
/*
 * Laconica - a distributed open-source microblogging tool
 * Copyright (C) 2008, Controlez-Vous, Inc.
 *
 * 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/>.
 */

if (!defined('LACONICA')) { exit(1); }

require_once(INSTALLDIR.'/lib/omb.php');

class FinishremotesubscribeAction extends Action
{

    function handle($args)
    {

        parent::handle($args);

        if (common_logged_in()) {
            $this->clientError(_('You can use the local subscription!'));
            return;
        }

        $omb = $_SESSION['oauth_authorization_request'];

        if (!$omb) {
            $this->clientError(_('Not expecting this response!'));
            return;
        }

        common_debug('stored request: '.print_r($omb,true), __FILE__);

        common_remove_magic_from_request();
        $req = OAuthRequest::from_request();

        $token = $req->get_parameter('oauth_token');

        # I think this is the success metric

        if ($token != $omb['token']) {
            $this->clientError(_('Not authorized.'));
            return;
        }

        $version = $req->get_parameter('omb_version');

        if ($version != OMB_VERSION_01) {
            $this->clientError(_('Unknown version of OMB protocol.'));
            return;
        }

        $nickname = $req->get_parameter('omb_listener_nickname');

        if (!$nickname) {
            $this->clientError(_('No nickname provided by remote server.'));
            return;
        }

        $profile_url = $req->get_parameter('omb_listener_profile');

        if (!$profile_url) {
            $this->clientError(_('No profile URL returned by server.'));
            return;
        }

        if (!Validate::uri($profile_url, array('allowed_schemes' => array('http', 'https')))) {
            $this->clientError(_('Invalid profile URL returned by server.'));
            return;
        }

        if ($profile_url == common_local_url('showstream', array('nickname' => $nickname))) {
            $this->clientError(_('You can use the local subscription!'));
            return;
        }

        common_debug('listenee: "'.$omb['listenee'].'"', __FILE__);

        $user = User::staticGet('nickname', $omb['listenee']);

        if (!$user) {
            $this->clientError(_('User being listened to doesn\'t exist.'));
            return;
        }

        $other = User::staticGet('uri', $omb['listener']);

        if ($other) {
            $this->clientError(_('You can use the local subscription!'));
            return;
        }

        $fullname = $req->get_parameter('omb_listener_fullname');
        $homepage = $req->get_parameter('omb_listener_homepage');
        $bio = $req->get_parameter('omb_listener_bio');
        $location = $req->get_parameter('omb_listener_location');
        $avatar_url = $req->get_parameter('omb_listener_avatar');

        list($newtok, $newsecret) = $this->access_token($omb);

        if (!$newtok || !$newsecret) {
            $this->clientError(_('Couldn\'t convert request tokens to access tokens.'));
            return;
        }

        # XXX: possible attack point; subscribe and return someone else's profile URI

        $remote = Remote_profile::staticGet('uri', $omb['listener']);

        if ($remote) {
            $exists = true;
            $profile = Profile::staticGet($remote->id);
            $orig_remote = clone($remote);
            $orig_profile = clone($profile);
            # XXX: compare current postNotice and updateProfile URLs to the ones
            # stored in the DB to avoid (possibly...) above attack
        } else {
            $exists = false;
            $remote = new Remote_profile();
            $remote->uri = $omb['listener'];
            $profile = new Profile();
        }

        $profile->nickname = $nickname;
        $profile->profileurl = $profile_url;

        if (!is_null($fullname)) {
            $profile->fullname = $fullname;
        }
        if (!is_null($homepage)) {
            $profile->homepage = $homepage;
        }
        if (!is_null($bio)) {
            $profile->bio = $bio;
        }
        if (!is_null($location)) {
            $profile->location = $location;
        }

        if ($exists) {
            $profile->update($orig_profile);
        } else {
            $profile->created = DB_DataObject_Cast::dateTime(); # current time
            $id = $profile->insert();
            if (!$id) {
                $this->serverError(_('Error inserting new profile'));
                return;
            }
            $remote->id = $id;
        }

        if ($avatar_url) {
            if (!$this->add_avatar($profile, $avatar_url)) {
                $this->serverError(_('Error inserting avatar'));
                return;
            }
        }

        $remote->postnoticeurl = $omb['post_notice_url'];
        $remote->updateprofileurl = $omb['update_profile_url'];

        if ($exists) {
            if (!$remote->update($orig_remote)) {
                $this->serverError(_('Error updating remote profile'));
                return;
            }
        } else {
            $remote->created = DB_DataObject_Cast::dateTime(); # current time
            if (!$remote->insert()) {
                $this->serverError(_('Error inserting remote profile'));
                return;
            }
        }

        if ($user->hasBlocked($profile)) {
            $this->clientError(_('That user has blocked you from subscribing.'));
            return;
        }

        $sub = new Subscription();

        $sub->subscriber = $remote->id;
        $sub->subscribed = $user->id;

        $sub_exists = false;

        if ($sub->find(true)) {
            $sub_exists = true;
            $orig_sub = clone($sub);
        } else {
            $sub_exists = false;
            $sub->created = DB_DataObject_Cast::dateTime(); # current time
        }

        $sub->token = $newtok;
        $sub->secret = $newsecret;

        if ($sub_exists) {
            $result = $sub->update($orig_sub);
        } else {
            $result = $sub->insert();
        }

        if (!$result) {
            common_log_db_error($sub, ($sub_exists) ? 'UPDATE' : 'INSERT', __FILE__);
            $this->clientError(_('Couldn\'t insert new subscription.'));
            return;
        }

        # Notify user, if necessary

        mail_subscribe_notify_profile($user, $profile);

        # Clear the data
        unset($_SESSION['oauth_authorization_request']);

        # If we show subscriptions in reverse chron order, this should
        # show up close to the top of the page

        common_redirect(common_local_url('subscribers', array('nickname' =>
                                                             $user->nickname)),
                        303);
    }

    function add_avatar($profile, $url)
    {
        $temp_filename = tempnam(sys_get_temp_dir(), 'listener_avatar');
        copy($url, $temp_filename);
        $imagefile = new ImageFile($profile->id, $temp_filename);
        $filename = Avatar::filename($profile->id,
                                     image_type_to_extension($imagefile->type),
                                     null,
                                     common_timestamp());
        rename($temp_filename, Avatar::path($filename));
        return $profile->setOriginal($filename);
    }

    function access_token($omb)
    {

        common_debug('starting request for access token', __FILE__);

        $con = omb_oauth_consumer();
        $tok = new OAuthToken($omb['token'], $omb['secret']);

        common_debug('using request token "'.$tok.'"', __FILE__);

        $url = $omb['access_token_url'];

        common_debug('using access token url "'.$url.'"', __FILE__);

        # XXX: Is this the right thing to do? Strip off GET params and make them
        # POST params? Seems wrong to me.

        $parsed = parse_url($url);
        $params = array();
        parse_str($parsed['query'], $params);

        $req = OAuthRequest::from_consumer_and_token($con, $tok, "POST", $url, $params);

        $req->set_parameter('omb_version', OMB_VERSION_01);

        # XXX: test to see if endpoint accepts this signature method

        $req->sign_request(omb_hmac_sha1(), $con, $tok);

        # We re-use this tool's fetcher, since it's pretty good

        common_debug('posting to access token url "'.$req->get_normalized_http_url().'"', __FILE__);
        common_debug('posting request data "'.$req->to_postdata().'"', __FILE__);

        $fetcher = Auth_Yadis_Yadis::getHTTPFetcher();
        $result = $fetcher->post($req->get_normalized_http_url(),
                                 $req->to_postdata(),
                                 array('User-Agent: Laconica/' . LACONICA_VERSION));

        common_debug('got result: "'.print_r($result,true).'"', __FILE__);

        if ($result->status != 200) {
            return null;
        }

        parse_str($result->body, $return);

        return array($return['oauth_token'], $return['oauth_token_secret']);
    }
}