3 * Laconica, the distributed open-source microblogging tool
5 * Base class for RSS 1.0 feed actions
9 * LICENCE: This program is free software: you can redistribute it and/or modify
10 * it under the terms of the GNU Affero General Public License as published by
11 * the Free Software Foundation, either version 3 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU Affero General Public License for more details.
19 * You should have received a copy of the GNU Affero General Public License
20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 * @author Evan Prodromou <evan@controlyourself.ca>
25 * @author Earle Martin <earle@downlode.org>
26 * @copyright 2008-9 Control Yourself, Inc.
27 * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
28 * @link http://laconi.ca/
31 if (!defined('LACONICA')) { exit(1); }
33 define('DEFAULT_RSS_LIMIT', 48);
35 class Rss10Action extends Action
37 # This will contain the details of each feed item's author and be used to generate SIOC data.
39 var $creators = array();
40 var $limit = DEFAULT_RSS_LIMIT;
46 * Just wraps the Action constructor.
48 * @param string $output URI to output to, default = stdout
49 * @param boolean $indent Whether to indent output, default true
51 * @see Action::__construct
54 function __construct($output='php://output', $indent=true)
56 parent::__construct($output, $indent);
60 * Do we need to write to the database?
62 * @return boolean true
71 * Read arguments and initialize members
73 * @param array $args Arguments from $_REQUEST
74 * @return boolean success
77 function prepare($args)
79 parent::prepare($args);
80 $this->limit = (int) $this->trimmed('limit');
81 if ($this->limit == 0) {
82 $this->limit = DEFAULT_RSS_LIMIT;
90 * @param array $args Arguments from $_REQUEST
95 function handle($args)
97 // Parent handling, including cache check
98 parent::handle($args);
100 if (common_config('site', 'private')) {
101 if (!isset($_SERVER['PHP_AUTH_USER'])) {
103 # This header makes basic auth go
104 header('WWW-Authenticate: Basic realm="Laconica RSS"');
106 # If the user hits cancel -- bam!
107 $this->show_basic_auth_error();
110 $nickname = $_SERVER['PHP_AUTH_USER'];
111 $password = $_SERVER['PHP_AUTH_PW'];
113 if (!common_check_user($nickname, $password)) {
114 # basic authentication failed
115 list($proxy, $ip) = common_client_ip();
117 common_log(LOG_WARNING, "Failed RSS auth attempt, nickname = $nickname, proxy = $proxy, ip = $ip.");
118 $this->show_basic_auth_error();
124 // Get the list of notices
125 if (empty($this->tag)) {
126 $this->notices = $this->getNotices($this->limit);
128 $this->notices = $this->getTaggedNotices($this->tag, $this->limit);
133 function show_basic_auth_error()
135 header('HTTP/1.1 401 Unauthorized');
136 header('Content-Type: application/xml; charset=utf-8');
138 $this->elementStart('hash');
139 $this->element('error', null, 'Could not authenticate you.');
140 $this->element('request', null, $_SERVER['REQUEST_URI']);
141 $this->elementEnd('hash');
146 * Get the notices to output in this stream
148 * @return array an array of Notice objects sorted in reverse chron
151 function getNotices()
157 * Get a description of the channel
159 * Returns an array with the following
163 function getChannel()
165 return array('url' => '',
168 'description' => '');
179 $this->showChannel();
182 foreach ($this->notices as $n) {
186 $this->showCreators();
190 function showChannel()
193 $channel = $this->getChannel();
194 $image = $this->getImage();
196 $this->elementStart('channel', array('rdf:about' => $channel['url']));
197 $this->element('title', null, $channel['title']);
198 $this->element('link', null, $channel['link']);
199 $this->element('description', null, $channel['description']);
200 $this->element('cc:licence', array('rdf:resource' => common_config('license','url')));
203 $this->element('image', array('rdf:resource' => $image));
206 $this->elementStart('items');
207 $this->elementStart('rdf:Seq');
209 foreach ($this->notices as $notice) {
210 $this->element('rdf:li', array('rdf:resource' => $notice->uri));
213 $this->elementEnd('rdf:Seq');
214 $this->elementEnd('items');
216 $this->elementEnd('channel');
221 $image = $this->getImage();
223 $channel = $this->getChannel();
224 $this->elementStart('image', array('rdf:about' => $image));
225 $this->element('title', null, $channel['title']);
226 $this->element('link', null, $channel['link']);
227 $this->element('url', null, $image);
228 $this->elementEnd('image');
232 function showItem($notice)
234 $profile = Profile::staticGet($notice->profile_id);
235 $nurl = common_local_url('shownotice', array('notice' => $notice->id));
236 $creator_uri = common_profile_uri($profile);
237 $this->elementStart('item', array('rdf:about' => $notice->uri,
238 'rdf:type' => 'http://rdfs.org/sioc/types#MicroblogPost'));
239 $title = $profile->nickname . ': ' . common_xml_safe_str(trim($notice->content));
240 $this->element('title', null, $title);
241 $this->element('link', null, $nurl);
242 $this->element('description', null, $profile->nickname."'s status on ".common_exact_date($notice->created));
243 if ($notice->rendered) {
244 $this->element('content:encoded', null, common_xml_safe_str($notice->rendered));
246 $this->element('dc:date', null, common_date_w3dtf($notice->created));
247 $this->element('dc:creator', null, ($profile->fullname) ? $profile->fullname : $profile->nickname);
248 $this->element('foaf:maker', array('rdf:resource' => $creator_uri));
249 $this->element('sioc:has_creator', array('rdf:resource' => $creator_uri.'#acct'));
250 $this->element('laconica:postIcon', array('rdf:resource' => $profile->avatarUrl()));
251 $this->element('cc:licence', array('rdf:resource' => common_config('license', 'url')));
252 if ($notice->reply_to) {
253 $replyurl = common_local_url('shownotice', array('notice' => $notice->reply_to));
254 $this->element('sioc:reply_of', array('rdf:resource' => $replyurl));
256 $attachments = $notice->attachments();
258 foreach($attachments as $attachment){
259 $this->element('enc:enclosure', array('rdf:resource'=>$attachment->url,'enc:type'=>$attachment->mimetype,'enc:length'=>$attachment->size), null);
263 $this->elementEnd('item');
264 $this->creators[$creator_uri] = $profile;
267 function showCreators()
269 foreach ($this->creators as $uri => $profile) {
271 $nickname = $profile->nickname;
272 $this->elementStart('foaf:Agent', array('rdf:about' => $uri));
273 $this->element('foaf:nick', null, $nickname);
274 if ($profile->fullname) {
275 $this->element('foaf:name', null, $profile->fullname);
277 $this->element('foaf:holdsAccount', array('rdf:resource' => $uri.'#acct'));
278 $avatar = $profile->avatarUrl();
279 $this->element('foaf:depiction', array('rdf:resource' => $avatar));
280 $this->elementEnd('foaf:Agent');
286 $channel = $this->getChannel();
287 header('Content-Type: application/rdf+xml');
290 $this->elementStart('rdf:RDF', array('xmlns:rdf' =>
291 'http://www.w3.org/1999/02/22-rdf-syntax-ns#',
293 'http://purl.org/dc/elements/1.1/',
295 'http://creativecommons.org/ns#',
297 'http://purl.org/rss/1.0/modules/content/',
299 'http://purl.oclc.org/net/rss_2.0/enc#',
301 'http://xmlns.com/foaf/0.1/',
303 'http://rdfs.org/sioc/ns#',
305 'http://rdfs.org/sioc/types#',
307 'http://laconi.ca/ont/',
308 'xmlns' => 'http://purl.org/rss/1.0/'));
309 $this->elementStart('sioc:Site', array('rdf:about' => common_root_url()));
310 $this->element('sioc:name', null, common_config('site', 'name'));
311 $this->elementStart('sioc:space_of');
312 $this->element('sioc:Container', array('rdf:about' =>
314 $this->elementEnd('sioc:space_of');
315 $this->elementEnd('sioc:Site');
320 $this->elementEnd('rdf:RDF');
324 * When was this page last modified?
328 function lastModified()
330 if (empty($this->notices)) {
334 if (count($this->notices) == 0) {
338 // FIXME: doesn't handle modified profiles, avatars, deleted notices
340 return strtotime($this->notices[0]->created);