| 1 | <?php
|
|---|
| 2 | /**
|
|---|
| 3 | * WordPress Feed API
|
|---|
| 4 | *
|
|---|
| 5 | * Many of the functions used in here belong in The Loop, or The Loop for the
|
|---|
| 6 | * Feeds.
|
|---|
| 7 | *
|
|---|
| 8 | * @package WordPress
|
|---|
| 9 | * @subpackage Feed
|
|---|
| 10 | */
|
|---|
| 11 |
|
|---|
| 12 | /**
|
|---|
| 13 | * RSS container for the bloginfo function.
|
|---|
| 14 | *
|
|---|
| 15 | * You can retrieve anything that you can using the get_bloginfo() function.
|
|---|
| 16 | * Everything will be stripped of tags and characters converted, when the values
|
|---|
| 17 | * are retrieved for use in the feeds.
|
|---|
| 18 | *
|
|---|
| 19 | * @package WordPress
|
|---|
| 20 | * @subpackage Feed
|
|---|
| 21 | * @since 1.5.1
|
|---|
| 22 | * @uses apply_filters() Calls 'get_bloginfo_rss' hook with two parameters.
|
|---|
| 23 | * @see get_bloginfo() For the list of possible values to display.
|
|---|
| 24 | *
|
|---|
| 25 | * @param string $show See get_bloginfo() for possible values.
|
|---|
| 26 | * @return string
|
|---|
| 27 | */
|
|---|
| 28 | function get_bloginfo_rss($show = '') {
|
|---|
| 29 | $info = strip_tags(get_bloginfo($show));
|
|---|
| 30 | return apply_filters('get_bloginfo_rss', convert_chars($info), $show);
|
|---|
| 31 | }
|
|---|
| 32 |
|
|---|
| 33 | /**
|
|---|
| 34 | * Display RSS container for the bloginfo function.
|
|---|
| 35 | *
|
|---|
| 36 | * You can retrieve anything that you can using the get_bloginfo() function.
|
|---|
| 37 | * Everything will be stripped of tags and characters converted, when the values
|
|---|
| 38 | * are retrieved for use in the feeds.
|
|---|
| 39 | *
|
|---|
| 40 | * @package WordPress
|
|---|
| 41 | * @subpackage Feed
|
|---|
| 42 | * @since 0.71
|
|---|
| 43 | * @uses apply_filters() Calls 'bloginfo_rss' hook with two parameters.
|
|---|
| 44 | * @see get_bloginfo() For the list of possible values to display.
|
|---|
| 45 | *
|
|---|
| 46 | * @param string $show See get_bloginfo() for possible values.
|
|---|
| 47 | */
|
|---|
| 48 | function bloginfo_rss($show = '') {
|
|---|
| 49 | echo apply_filters('bloginfo_rss', get_bloginfo_rss($show), $show);
|
|---|
| 50 | }
|
|---|
| 51 |
|
|---|
| 52 | /**
|
|---|
| 53 | * Retrieve the default feed.
|
|---|
| 54 | *
|
|---|
| 55 | * The default feed is 'rss2', unless a plugin changes it through the
|
|---|
| 56 | * 'default_feed' filter.
|
|---|
| 57 | *
|
|---|
| 58 | * @package WordPress
|
|---|
| 59 | * @subpackage Feed
|
|---|
| 60 | * @since 2.5
|
|---|
| 61 | * @uses apply_filters() Calls 'default_feed' hook on the default feed string.
|
|---|
| 62 | *
|
|---|
| 63 | * @return string Default feed, or for example 'rss2', 'atom', etc.
|
|---|
| 64 | */
|
|---|
| 65 | function get_default_feed() {
|
|---|
| 66 | return apply_filters('default_feed', 'rss2');
|
|---|
| 67 | }
|
|---|
| 68 |
|
|---|
| 69 | /**
|
|---|
| 70 | * Retrieve the blog title for the feed title.
|
|---|
| 71 | *
|
|---|
| 72 | * @package WordPress
|
|---|
| 73 | * @subpackage Feed
|
|---|
| 74 | * @since 2.2.0
|
|---|
| 75 | * @uses apply_filters() Calls 'get_wp_title_rss' hook on title.
|
|---|
| 76 | * @uses wp_title() See function for $sep parameter usage.
|
|---|
| 77 | *
|
|---|
| 78 | * @param string $sep Optional.How to separate the title. See wp_title() for more info.
|
|---|
| 79 | * @return string Error message on failure or blog title on success.
|
|---|
| 80 | */
|
|---|
| 81 | function get_wp_title_rss($sep = '»') {
|
|---|
| 82 | $title = wp_title($sep, false);
|
|---|
| 83 | if ( is_wp_error( $title ) )
|
|---|
| 84 | return $title->get_error_message();
|
|---|
| 85 | $title = apply_filters('get_wp_title_rss', $title);
|
|---|
| 86 | return $title;
|
|---|
| 87 | }
|
|---|
| 88 |
|
|---|
| 89 | /**
|
|---|
| 90 | * Display the blog title for display of the feed title.
|
|---|
| 91 | *
|
|---|
| 92 | * @package WordPress
|
|---|
| 93 | * @subpackage Feed
|
|---|
| 94 | * @since 2.2.0
|
|---|
| 95 | * @uses apply_filters() Calls 'wp_title_rss' on the blog title.
|
|---|
| 96 | * @see wp_title() $sep parameter usage.
|
|---|
| 97 | *
|
|---|
| 98 | * @param string $sep Optional.
|
|---|
| 99 | */
|
|---|
| 100 | function wp_title_rss($sep = '»') {
|
|---|
| 101 | echo apply_filters('wp_title_rss', get_wp_title_rss($sep));
|
|---|
| 102 | }
|
|---|
| 103 |
|
|---|
| 104 | /**
|
|---|
| 105 | * Retrieve the current post title for the feed.
|
|---|
| 106 | *
|
|---|
| 107 | * @package WordPress
|
|---|
| 108 | * @subpackage Feed
|
|---|
| 109 | * @since 2.0.0
|
|---|
| 110 | * @uses apply_filters() Calls 'the_title_rss' on the post title.
|
|---|
| 111 | *
|
|---|
| 112 | * @return string Current post title.
|
|---|
| 113 | */
|
|---|
| 114 | function get_the_title_rss() {
|
|---|
| 115 | $title = get_the_title();
|
|---|
| 116 | $title = apply_filters('the_title_rss', $title);
|
|---|
| 117 | return $title;
|
|---|
| 118 | }
|
|---|
| 119 |
|
|---|
| 120 | /**
|
|---|
| 121 | * Display the post title in the feed.
|
|---|
| 122 | *
|
|---|
| 123 | * @package WordPress
|
|---|
| 124 | * @subpackage Feed
|
|---|
| 125 | * @since 0.71
|
|---|
| 126 | * @uses get_the_title_rss() Used to retrieve current post title.
|
|---|
| 127 | */
|
|---|
| 128 | function the_title_rss() {
|
|---|
| 129 | echo get_the_title_rss();
|
|---|
| 130 | }
|
|---|
| 131 |
|
|---|
| 132 | /**
|
|---|
| 133 | * Display the post content for the feed.
|
|---|
| 134 | *
|
|---|
| 135 | * For encoding the html or the $encode_html parameter, there are three possible
|
|---|
| 136 | * values. '0' will make urls footnotes and use make_url_footnote(). '1' will
|
|---|
| 137 | * encode special characters and automatically display all of the content. The
|
|---|
| 138 | * value of '2' will strip all HTML tags from the content.
|
|---|
| 139 | *
|
|---|
| 140 | * Also note that you cannot set the amount of words and not set the html
|
|---|
| 141 | * encoding. If that is the case, then the html encoding will default to 2,
|
|---|
| 142 | * which will strip all HTML tags.
|
|---|
| 143 | *
|
|---|
| 144 | * To restrict the amount of words of the content, you can use the cut
|
|---|
| 145 | * parameter. If the content is less than the amount, then there won't be any
|
|---|
| 146 | * dots added to the end. If there is content left over, then dots will be added
|
|---|
| 147 | * and the rest of the content will be removed.
|
|---|
| 148 | *
|
|---|
| 149 | * @package WordPress
|
|---|
| 150 | * @subpackage Feed
|
|---|
| 151 | * @since 0.71
|
|---|
| 152 | * @uses apply_filters() Calls 'the_content_rss' on the content before processing.
|
|---|
| 153 | * @see get_the_content() For the $more_link_text, $stripteaser, and $more_file
|
|---|
| 154 | * parameters.
|
|---|
| 155 | *
|
|---|
| 156 | * @param string $more_link_text Optional. Text to display when more content is available but not displayed.
|
|---|
| 157 | * @param int|bool $stripteaser Optional. Default is 0.
|
|---|
| 158 | * @param string $more_file Optional.
|
|---|
| 159 | * @param int $cut Optional. Amount of words to keep for the content.
|
|---|
| 160 | * @param int $encode_html Optional. How to encode the content.
|
|---|
| 161 | */
|
|---|
| 162 | function the_content_rss($more_link_text='(more...)', $stripteaser=0, $more_file='', $cut = 0, $encode_html = 0) {
|
|---|
| 163 | $content = get_the_content($more_link_text, $stripteaser, $more_file);
|
|---|
| 164 | $content = apply_filters('the_content_rss', $content);
|
|---|
| 165 | if ( $cut && !$encode_html )
|
|---|
| 166 | $encode_html = 2;
|
|---|
| 167 | if ( 1== $encode_html ) {
|
|---|
| 168 | $content = esc_html($content);
|
|---|
| 169 | $cut = 0;
|
|---|
| 170 | } elseif ( 0 == $encode_html ) {
|
|---|
| 171 | $content = make_url_footnote($content);
|
|---|
| 172 | } elseif ( 2 == $encode_html ) {
|
|---|
| 173 | $content = strip_tags($content);
|
|---|
| 174 | }
|
|---|
| 175 | if ( $cut ) {
|
|---|
| 176 | $blah = explode(' ', $content);
|
|---|
| 177 | if ( count($blah) > $cut ) {
|
|---|
| 178 | $k = $cut;
|
|---|
| 179 | $use_dotdotdot = 1;
|
|---|
| 180 | } else {
|
|---|
| 181 | $k = count($blah);
|
|---|
| 182 | $use_dotdotdot = 0;
|
|---|
| 183 | }
|
|---|
| 184 |
|
|---|
| 185 | /** @todo Check performance, might be faster to use array slice instead. */
|
|---|
| 186 | for ( $i=0; $i<$k; $i++ )
|
|---|
| 187 | $excerpt .= $blah[$i].' ';
|
|---|
| 188 | $excerpt .= ($use_dotdotdot) ? '...' : '';
|
|---|
| 189 | $content = $excerpt;
|
|---|
| 190 | }
|
|---|
| 191 | $content = str_replace(']]>', ']]>', $content);
|
|---|
| 192 | echo $content;
|
|---|
| 193 | }
|
|---|
| 194 |
|
|---|
| 195 | /**
|
|---|
| 196 | * Display the post excerpt for the feed.
|
|---|
| 197 | *
|
|---|
| 198 | * @package WordPress
|
|---|
| 199 | * @subpackage Feed
|
|---|
| 200 | * @since 0.71
|
|---|
| 201 | * @uses apply_filters() Calls 'the_excerpt_rss' hook on the excerpt.
|
|---|
| 202 | */
|
|---|
| 203 | function the_excerpt_rss() {
|
|---|
| 204 | $output = get_the_excerpt();
|
|---|
| 205 | echo apply_filters('the_excerpt_rss', $output);
|
|---|
| 206 | }
|
|---|
| 207 |
|
|---|
| 208 | /**
|
|---|
| 209 | * Display the permalink to the post for use in feeds.
|
|---|
| 210 | *
|
|---|
| 211 | * @package WordPress
|
|---|
| 212 | * @subpackage Feed
|
|---|
| 213 | * @since 2.3.0
|
|---|
| 214 | * @uses apply_filters() Call 'the_permalink_rss' on the post permalink
|
|---|
| 215 | */
|
|---|
| 216 | function the_permalink_rss() {
|
|---|
| 217 | echo apply_filters('the_permalink_rss', get_permalink());
|
|---|
| 218 | }
|
|---|
| 219 |
|
|---|
| 220 | /**
|
|---|
| 221 | * Display the feed GUID for the current comment.
|
|---|
| 222 | *
|
|---|
| 223 | * @package WordPress
|
|---|
| 224 | * @subpackage Feed
|
|---|
| 225 | * @since unknown
|
|---|
| 226 | *
|
|---|
| 227 | * @param int|object $comment_id Optional comment object or id. Defaults to global comment object.
|
|---|
| 228 | */
|
|---|
| 229 | function comment_guid($comment_id = null) {
|
|---|
| 230 | echo get_comment_guid($comment_id);
|
|---|
| 231 | }
|
|---|
| 232 |
|
|---|
| 233 | /**
|
|---|
| 234 | * Retrieve the feed GUID for the current comment.
|
|---|
| 235 | *
|
|---|
| 236 | * @package WordPress
|
|---|
| 237 | * @subpackage Feed
|
|---|
| 238 | * @since unknown
|
|---|
| 239 | *
|
|---|
| 240 | * @param int|object $comment_id Optional comment object or id. Defaults to global comment object.
|
|---|
| 241 | * @return bool|string false on failure or guid for comment on success.
|
|---|
| 242 | */
|
|---|
| 243 | function get_comment_guid($comment_id = null) {
|
|---|
| 244 | $comment = get_comment($comment_id);
|
|---|
| 245 |
|
|---|
| 246 | if ( !is_object($comment) )
|
|---|
| 247 | return false;
|
|---|
| 248 |
|
|---|
| 249 | return get_the_guid($comment->comment_post_ID) . '#comment-' . $comment->comment_ID;
|
|---|
| 250 | }
|
|---|
| 251 |
|
|---|
| 252 | /**
|
|---|
| 253 | * Display the link to the comments.
|
|---|
| 254 | *
|
|---|
| 255 | * @since 1.5.0
|
|---|
| 256 | */
|
|---|
| 257 | function comment_link() {
|
|---|
| 258 | echo esc_url( get_comment_link() );
|
|---|
| 259 | }
|
|---|
| 260 |
|
|---|
| 261 | /**
|
|---|
| 262 | * Retrieve the current comment author for use in the feeds.
|
|---|
| 263 | *
|
|---|
| 264 | * @package WordPress
|
|---|
| 265 | * @subpackage Feed
|
|---|
| 266 | * @since 2.0.0
|
|---|
| 267 | * @uses apply_filters() Calls 'comment_author_rss' hook on comment author.
|
|---|
| 268 | * @uses get_comment_author()
|
|---|
| 269 | *
|
|---|
| 270 | * @return string Comment Author
|
|---|
| 271 | */
|
|---|
| 272 | function get_comment_author_rss() {
|
|---|
| 273 | return apply_filters('comment_author_rss', get_comment_author() );
|
|---|
| 274 | }
|
|---|
| 275 |
|
|---|
| 276 | /**
|
|---|
| 277 | * Display the current comment author in the feed.
|
|---|
| 278 | *
|
|---|
| 279 | * @package WordPress
|
|---|
| 280 | * @subpackage Feed
|
|---|
| 281 | * @since 1.0.0
|
|---|
| 282 | */
|
|---|
| 283 | function comment_author_rss() {
|
|---|
| 284 | echo get_comment_author_rss();
|
|---|
| 285 | }
|
|---|
| 286 |
|
|---|
| 287 | /**
|
|---|
| 288 | * Display the current comment content for use in the feeds.
|
|---|
| 289 | *
|
|---|
| 290 | * @package WordPress
|
|---|
| 291 | * @subpackage Feed
|
|---|
| 292 | * @since 1.0.0
|
|---|
| 293 | * @uses apply_filters() Calls 'comment_text_rss' filter on comment content.
|
|---|
| 294 | * @uses get_comment_text()
|
|---|
| 295 | */
|
|---|
| 296 | function comment_text_rss() {
|
|---|
| 297 | $comment_text = get_comment_text();
|
|---|
| 298 | $comment_text = apply_filters('comment_text_rss', $comment_text);
|
|---|
| 299 | echo $comment_text;
|
|---|
| 300 | }
|
|---|
| 301 |
|
|---|
| 302 | /**
|
|---|
| 303 | * Retrieve all of the post categories, formatted for use in feeds.
|
|---|
| 304 | *
|
|---|
| 305 | * All of the categories for the current post in the feed loop, will be
|
|---|
| 306 | * retrieved and have feed markup added, so that they can easily be added to the
|
|---|
| 307 | * RSS2, Atom, or RSS1 and RSS0.91 RDF feeds.
|
|---|
| 308 | *
|
|---|
| 309 | * @package WordPress
|
|---|
| 310 | * @subpackage Feed
|
|---|
| 311 | * @since 2.1.0
|
|---|
| 312 | * @uses apply_filters()
|
|---|
| 313 | *
|
|---|
| 314 | * @param string $type Optional, default is 'rss'. Either 'rss', 'atom', or 'rdf'.
|
|---|
| 315 | * @return string All of the post categories for displaying in the feed.
|
|---|
| 316 | */
|
|---|
| 317 | function get_the_category_rss($type = 'rss') {
|
|---|
| 318 | $categories = get_the_category();
|
|---|
| 319 | $tags = get_the_tags();
|
|---|
| 320 | $the_list = '';
|
|---|
| 321 | $cat_names = array();
|
|---|
| 322 |
|
|---|
| 323 | $filter = 'rss';
|
|---|
| 324 | if ( 'atom' == $type )
|
|---|
| 325 | $filter = 'raw';
|
|---|
| 326 |
|
|---|
| 327 | if ( !empty($categories) ) foreach ( (array) $categories as $category ) {
|
|---|
| 328 | $cat_names[] = sanitize_term_field('name', $category->name, $category->term_id, 'category', $filter);
|
|---|
| 329 | }
|
|---|
| 330 |
|
|---|
| 331 | if ( !empty($tags) ) foreach ( (array) $tags as $tag ) {
|
|---|
| 332 | $cat_names[] = sanitize_term_field('name', $tag->name, $tag->term_id, 'post_tag', $filter);
|
|---|
| 333 | }
|
|---|
| 334 |
|
|---|
| 335 | $cat_names = array_unique($cat_names);
|
|---|
| 336 |
|
|---|
| 337 | foreach ( $cat_names as $cat_name ) {
|
|---|
| 338 | if ( 'rdf' == $type )
|
|---|
| 339 | $the_list .= "\t\t<dc:subject><![CDATA[$cat_name]]></dc:subject>\n";
|
|---|
| 340 | elseif ( 'atom' == $type )
|
|---|
| 341 | $the_list .= sprintf( '<category scheme="%1$s" term="%2$s" />', esc_attr( apply_filters( 'get_bloginfo_rss', get_bloginfo( 'url' ) ) ), esc_attr( $cat_name ) );
|
|---|
| 342 | else
|
|---|
| 343 | $the_list .= "\t\t<category><![CDATA[" . @html_entity_decode( $cat_name, ENT_COMPAT, get_option('blog_charset') ) . "]]></category>\n";
|
|---|
| 344 | }
|
|---|
| 345 |
|
|---|
| 346 | return apply_filters('the_category_rss', $the_list, $type);
|
|---|
| 347 | }
|
|---|
| 348 |
|
|---|
| 349 | /**
|
|---|
| 350 | * Display the post categories in the feed.
|
|---|
| 351 | *
|
|---|
| 352 | * @package WordPress
|
|---|
| 353 | * @subpackage Feed
|
|---|
| 354 | * @since 0.71
|
|---|
| 355 | * @see get_the_category_rss() For better explanation.
|
|---|
| 356 | *
|
|---|
| 357 | * @param string $type Optional, default is 'rss'. Either 'rss', 'atom', or 'rdf'.
|
|---|
| 358 | */
|
|---|
| 359 | function the_category_rss($type = 'rss') {
|
|---|
| 360 | echo get_the_category_rss($type);
|
|---|
| 361 | }
|
|---|
| 362 |
|
|---|
| 363 | /**
|
|---|
| 364 | * Display the HTML type based on the blog setting.
|
|---|
| 365 | *
|
|---|
| 366 | * The two possible values are either 'xhtml' or 'html'.
|
|---|
| 367 | *
|
|---|
| 368 | * @package WordPress
|
|---|
| 369 | * @subpackage Feed
|
|---|
| 370 | * @since 2.2.0
|
|---|
| 371 | */
|
|---|
| 372 | function html_type_rss() {
|
|---|
| 373 | $type = get_bloginfo('html_type');
|
|---|
| 374 | if (strpos($type, 'xhtml') !== false)
|
|---|
| 375 | $type = 'xhtml';
|
|---|
| 376 | else
|
|---|
| 377 | $type = 'html';
|
|---|
| 378 | echo $type;
|
|---|
| 379 | }
|
|---|
| 380 |
|
|---|
| 381 | /**
|
|---|
| 382 | * Display the rss enclosure for the current post.
|
|---|
| 383 | *
|
|---|
| 384 | * Uses the global $post to check whether the post requires a password and if
|
|---|
| 385 | * the user has the password for the post. If not then it will return before
|
|---|
| 386 | * displaying.
|
|---|
| 387 | *
|
|---|
| 388 | * Also uses the function get_post_custom() to get the post's 'enclosure'
|
|---|
| 389 | * metadata field and parses the value to display the enclosure(s). The
|
|---|
| 390 | * enclosure(s) consist of enclosure HTML tag(s) with a URI and other
|
|---|
| 391 | * attributes.
|
|---|
| 392 | *
|
|---|
| 393 | * @package WordPress
|
|---|
| 394 | * @subpackage Template
|
|---|
| 395 | * @since 1.5.0
|
|---|
| 396 | * @uses apply_filters() Calls 'rss_enclosure' hook on rss enclosure.
|
|---|
| 397 | * @uses get_post_custom() To get the current post enclosure metadata.
|
|---|
| 398 | */
|
|---|
| 399 | function rss_enclosure() {
|
|---|
| 400 | if ( post_password_required() )
|
|---|
| 401 | return;
|
|---|
| 402 |
|
|---|
| 403 | foreach ( (array) get_post_custom() as $key => $val) {
|
|---|
| 404 | if ($key == 'enclosure') {
|
|---|
| 405 | foreach ( (array) $val as $enc ) {
|
|---|
| 406 | $enclosure = explode("\n", $enc);
|
|---|
| 407 |
|
|---|
| 408 | //only get the the first element eg, audio/mpeg from 'audio/mpeg mpga mp2 mp3'
|
|---|
| 409 | $t = preg_split('/[ \t]/', trim($enclosure[2]) );
|
|---|
| 410 | $type = $t[0];
|
|---|
| 411 |
|
|---|
| 412 | echo apply_filters('rss_enclosure', '<enclosure url="' . trim(htmlspecialchars($enclosure[0])) . '" length="' . trim($enclosure[1]) . '" type="' . $type . '" />' . "\n");
|
|---|
| 413 | }
|
|---|
| 414 | }
|
|---|
| 415 | }
|
|---|
| 416 | }
|
|---|
| 417 |
|
|---|
| 418 | /**
|
|---|
| 419 | * Display the atom enclosure for the current post.
|
|---|
| 420 | *
|
|---|
| 421 | * Uses the global $post to check whether the post requires a password and if
|
|---|
| 422 | * the user has the password for the post. If not then it will return before
|
|---|
| 423 | * displaying.
|
|---|
| 424 | *
|
|---|
| 425 | * Also uses the function get_post_custom() to get the post's 'enclosure'
|
|---|
| 426 | * metadata field and parses the value to display the enclosure(s). The
|
|---|
| 427 | * enclosure(s) consist of link HTML tag(s) with a URI and other attributes.
|
|---|
| 428 | *
|
|---|
| 429 | * @package WordPress
|
|---|
| 430 | * @subpackage Template
|
|---|
| 431 | * @since 2.2.0
|
|---|
| 432 | * @uses apply_filters() Calls 'atom_enclosure' hook on atom enclosure.
|
|---|
| 433 | * @uses get_post_custom() To get the current post enclosure metadata.
|
|---|
| 434 | */
|
|---|
| 435 | function atom_enclosure() {
|
|---|
| 436 | if ( post_password_required() )
|
|---|
| 437 | return;
|
|---|
| 438 |
|
|---|
| 439 | foreach ( (array) get_post_custom() as $key => $val ) {
|
|---|
| 440 | if ($key == 'enclosure') {
|
|---|
| 441 | foreach ( (array) $val as $enc ) {
|
|---|
| 442 | $enclosure = split("\n", $enc);
|
|---|
| 443 | echo apply_filters('atom_enclosure', '<link href="' . trim(htmlspecialchars($enclosure[0])) . '" rel="enclosure" length="' . trim($enclosure[1]) . '" type="' . trim($enclosure[2]) . '" />' . "\n");
|
|---|
| 444 | }
|
|---|
| 445 | }
|
|---|
| 446 | }
|
|---|
| 447 | }
|
|---|
| 448 |
|
|---|
| 449 | /**
|
|---|
| 450 | * Determine the type of a string of data with the data formatted.
|
|---|
| 451 | *
|
|---|
| 452 | * Tell whether the type is text, html, or xhtml, per RFC 4287 section 3.1.
|
|---|
| 453 | *
|
|---|
| 454 | * In the case of WordPress, text is defined as containing no markup,
|
|---|
| 455 | * xhtml is defined as "well formed", and html as tag soup (i.e., the rest).
|
|---|
| 456 | *
|
|---|
| 457 | * Container div tags are added to xhtml values, per section 3.1.1.3.
|
|---|
| 458 | *
|
|---|
| 459 | * @link http://www.atomenabled.org/developers/syndication/atom-format-spec.php#rfc.section.3.1
|
|---|
| 460 | *
|
|---|
| 461 | * @package WordPress
|
|---|
| 462 | * @subpackage Feed
|
|---|
| 463 | * @since 2.5
|
|---|
| 464 | *
|
|---|
| 465 | * @param string $data Input string
|
|---|
| 466 | * @return array array(type, value)
|
|---|
| 467 | */
|
|---|
| 468 | function prep_atom_text_construct($data) {
|
|---|
| 469 | if (strpos($data, '<') === false && strpos($data, '&') === false) {
|
|---|
| 470 | return array('text', $data);
|
|---|
| 471 | }
|
|---|
| 472 |
|
|---|
| 473 | $parser = xml_parser_create();
|
|---|
| 474 | xml_parse($parser, '<div>' . $data . '</div>', true);
|
|---|
| 475 | $code = xml_get_error_code($parser);
|
|---|
| 476 | xml_parser_free($parser);
|
|---|
| 477 |
|
|---|
| 478 | if (!$code) {
|
|---|
| 479 | if (strpos($data, '<') === false) {
|
|---|
| 480 | return array('text', $data);
|
|---|
| 481 | } else {
|
|---|
| 482 | $data = "<div xmlns='http://www.w3.org/1999/xhtml'>$data</div>";
|
|---|
| 483 | return array('xhtml', $data);
|
|---|
| 484 | }
|
|---|
| 485 | }
|
|---|
| 486 |
|
|---|
| 487 | if (strpos($data, ']]>') == false) {
|
|---|
| 488 | return array('html', "<![CDATA[$data]]>");
|
|---|
| 489 | } else {
|
|---|
| 490 | return array('html', htmlspecialchars($data));
|
|---|
| 491 | }
|
|---|
| 492 | }
|
|---|
| 493 |
|
|---|
| 494 | /**
|
|---|
| 495 | * Display the link for the currently displayed feed in a XSS safe way.
|
|---|
| 496 | *
|
|---|
| 497 | * Generate a correct link for the atom:self element.
|
|---|
| 498 | *
|
|---|
| 499 | * @package WordPress
|
|---|
| 500 | * @subpackage Feed
|
|---|
| 501 | * @since 2.5
|
|---|
| 502 | */
|
|---|
| 503 | function self_link() {
|
|---|
| 504 | $host = @parse_url(get_option('home'));
|
|---|
| 505 | $host = $host['host'];
|
|---|
| 506 | echo esc_url(
|
|---|
| 507 | 'http'
|
|---|
| 508 | . ( (isset($_SERVER['https']) && $_SERVER['https'] == 'on') ? 's' : '' ) . '://'
|
|---|
| 509 | . $host
|
|---|
| 510 | . stripslashes($_SERVER['REQUEST_URI'])
|
|---|
| 511 | );
|
|---|
| 512 | }
|
|---|
| 513 |
|
|---|
| 514 | /**
|
|---|
| 515 | * Return the content type for specified feed type.
|
|---|
| 516 | *
|
|---|
| 517 | * @package WordPress
|
|---|
| 518 | * @subpackage Feed
|
|---|
| 519 | * @since 2.8.0
|
|---|
| 520 | */
|
|---|
| 521 | function feed_content_type( $type = '' ) {
|
|---|
| 522 | if ( empty($type) )
|
|---|
| 523 | $type = get_default_feed();
|
|---|
| 524 |
|
|---|
| 525 | $types = array(
|
|---|
| 526 | 'rss' => 'application/rss+xml',
|
|---|
| 527 | 'rss2' => 'application/rss+xml',
|
|---|
| 528 | 'rss-http' => 'text/xml',
|
|---|
| 529 | 'atom' => 'application/atom+xml',
|
|---|
| 530 | 'rdf' => 'application/rdf+xml'
|
|---|
| 531 | );
|
|---|
| 532 |
|
|---|
| 533 | $content_type = ( !empty($types[$type]) ) ? $types[$type] : 'application/octet-stream';
|
|---|
| 534 |
|
|---|
| 535 | return apply_filters( 'feed_content_type', $content_type, $type );
|
|---|
| 536 | }
|
|---|
| 537 |
|
|---|
| 538 | /**
|
|---|
| 539 | * Build SimplePie object based on RSS or Atom feed from URL.
|
|---|
| 540 | *
|
|---|
| 541 | * @since 2.8
|
|---|
| 542 | *
|
|---|
| 543 | * @param string $url URL to retrieve feed
|
|---|
| 544 | * @return WP_Error|SimplePie WP_Error object on failure or SimplePie object on success
|
|---|
| 545 | */
|
|---|
| 546 | function fetch_feed($url) {
|
|---|
| 547 | require_once (ABSPATH . WPINC . '/class-feed.php');
|
|---|
| 548 |
|
|---|
| 549 | $feed = new SimplePie();
|
|---|
| 550 | $feed->set_feed_url($url);
|
|---|
| 551 | $feed->set_cache_class('WP_Feed_Cache');
|
|---|
| 552 | $feed->set_file_class('WP_SimplePie_File');
|
|---|
| 553 | $feed->set_cache_duration(apply_filters('wp_feed_cache_transient_lifetime', 43200));
|
|---|
| 554 | $feed->init();
|
|---|
| 555 | $feed->handle_content_type();
|
|---|
| 556 |
|
|---|
| 557 | if ( $feed->error() )
|
|---|
| 558 | return new WP_Error('simplepie-error', $feed->error());
|
|---|
| 559 |
|
|---|
| 560 | return $feed;
|
|---|
| 561 | }
|
|---|
