/**
* Checks to see if all of the feed url in $check_urls are cached.
*
* If $check_urls is empty, look for the rss feed url found in the dashboard
* widget optios of $widget_id. If cached, call $callback, a function that
* echoes out output for this widget. If not cache, echo a "Loading..." stub
* which is later replaced by AJAX call (see top of /wp-admin/index.php)
*
* @since unknown
*
* @param int $widget_id
* @param callback $callback
* @param array $check_urls RSS feeds
* @return bool False on failure. True on success.
*/
function wp_dashboard_cached_rss_widget( $widget_id, $callback, $check_urls = array() ) {
$loading = '<p class="widget-loading">' . __( 'Loading…' ) . '</p>';
if ( empty($check_urls) ) {
$widgets = get_option( 'dashboard_widget_options' );
if ( empty($widgets[$widget_id]['url']) ) {
echo $loading;
return false;
}
$check_urls = array( $widgets[$widget_id]['url'] );
}
require_once( ABSPATH . WPINC . '/rss.php' );
init(); // initialize rss constants
$cache = new RSSCache( MAGPIE_CACHE_DIR, MAGPIE_CACHE_AGE );
foreach ( $check_urls as $check_url ) {
$status = $cache->check_cache( $check_url );
if ( 'HIT' !== $status ) {
echo $loading;
return false;
}
}
if ( $callback && is_callable( $callback ) ) {
$args = array_slice( func_get_args(), 2 );
array_unshift( $args, $widget_id );
call_user_func_array( $callback, $args );
}
return true;
}
/**
* Build Magpie object based on RSS from URL.
*
* @since 1.5.0
* @package External
* @subpackage MagpieRSS
*
* @param string $url URL to retrieve feed
* @return bool|MagpieRSS false on failure or MagpieRSS object on success.
*/
function fetch_rss($url)
{
// initialize constants
init();
if (!isset($url)) {
// error("fetch_rss called without a url");
return false;
}
// if cache is disabled
if (!MAGPIE_CACHE_ON) {
// fetch file, and parse it
$resp = _fetch_remote_file($url);
if (is_success($resp->status)) {
return _response_to_rss($resp);
} else {
// error("Failed to fetch $url and cache is off");
return false;
}
} else {
// Flow
// 1. check cache
// 2. if there is a hit, make sure its fresh
// 3. if cached obj fails freshness check, fetch remote
// 4. if remote fails, return stale object, or error
$cache = new RSSCache(MAGPIE_CACHE_DIR, MAGPIE_CACHE_AGE);
if (MAGPIE_DEBUG and $cache->ERROR) {
debug($cache->ERROR, E_USER_WARNING);
}
$cache_status = 0;
// response of check_cache
$request_headers = array();
// HTTP headers to send with fetch
$rss = 0;
// parsed RSS object
$errormsg = 0;
// errors, if any
if (!$cache->ERROR) {
// return cache HIT, MISS, or STALE
$cache_status = $cache->check_cache($url);
}
// if object cached, and cache is fresh, return cached obj
if ($cache_status == 'HIT') {
$rss = $cache->get($url);
if (isset($rss) and $rss) {
$rss->from_cache = 1;
if (MAGPIE_DEBUG > 1) {
debug("MagpieRSS: Cache HIT", E_USER_NOTICE);
}
return $rss;
}
}
// else attempt a conditional get
// set up headers
if ($cache_status == 'STALE') {
$rss = $cache->get($url);
if (isset($rss->etag) and $rss->last_modified) {
$request_headers['If-None-Match'] = $rss->etag;
$request_headers['If-Last-Modified'] = $rss->last_modified;
}
}
$resp = _fetch_remote_file($url, $request_headers);
if (isset($resp) and $resp) {
if ($resp->status == '304') {
// we have the most current copy
if (MAGPIE_DEBUG > 1) {
debug("Got 304 for {$url}");
}
// reset cache on 304 (at minutillo insistent prodding)
$cache->set($url, $rss);
return $rss;
} elseif (is_success($resp->status)) {
$rss = _response_to_rss($resp);
if ($rss) {
if (MAGPIE_DEBUG > 1) {
debug("Fetch successful");
}
// add object to cache
$cache->set($url, $rss);
return $rss;
}
} else {
$errormsg = "Failed to fetch {$url}. ";
if ($resp->error) {
# compensate for Snoopy's annoying habbit to tacking
# on '\n'
$http_error = substr($resp->error, 0, -2);
$errormsg .= "(HTTP Error: {$http_error})";
} else {
$errormsg .= "(HTTP Response: " . $resp->response_code . ')';
}
}
} else {
$errormsg = "Unable to retrieve RSS file for unknown reasons.";
}
// else fetch failed
// attempt to return cached object
if ($rss) {
if (MAGPIE_DEBUG) {
debug("Returning STALE object for {$url}");
}
return $rss;
}
// else we totally failed
// error( $errormsg );
return false;
}
// end if ( !MAGPIE_CACHE_ON ) {
}
function fetch_request($request)
{
global $CFG;
make_upload_directory('/cache/youtube');
$cache = new RSSCache($CFG->dataroot . '/cache/youtube', YOUTUBE_CACHE_EXPIRATION);
$cache_status = $cache->check_cache($request);
if ($cache_status == 'HIT') {
$cached_response = $cache->get($request);
$xmlobj = XML_unserialize($cached_response);
return $this->render_video_list($xmlobj);
}
if ($cache_status == 'STALE') {
$cached_response = $cache->get($request);
}
$response = download_file_content($request);
if (empty($response)) {
$response = $cached_response;
} else {
$cache->set($request, $response);
}
$xmlobj = XML_unserialize($response);
return $this->render_video_list($xmlobj);
}
function fetch_request($request)
{
global $CFG;
make_upload_directory('/cache/flickr');
$cache = new RSSCache($CFG->dataroot . '/cache/flickr', FLICKR_CACHE_EXPIRATION);
$cache_status = $cache->check_cache($request);
if ($cache_status == 'HIT') {
$cached_response = $cache->get($request);
return $cached_response;
}
if ($cache_status == 'STALE') {
$cached_response = $cache->get($request);
}
$response = download_file_content($request);
if (empty($response)) {
$response = $cached_response;
} else {
$cache->set($request, $response);
}
return $response;
}
function fetch_request($request)
{
global $CFG;
make_upload_directory('/cache/youtube');
$cache = new RSSCache($CFG->dataroot . '/cache/youtube', YOUTUBE_CACHE_EXPIRATION);
$cache_status = $cache->check_cache($request);
if ($cache_status == 'HIT') {
$cached_response = $cache->get($request);
// TODO: Stop using phpxml, switching to DOM/Simple for this
// TODO: Drop lib/phpxml if 0 uses in core/contrib
$xmlobj = XML_unserialize($cached_response);
return $this->render_video_list($xmlobj);
}
if ($cache_status == 'STALE') {
$cached_response = $cache->get($request);
}
$response = download_file_content($request);
if (empty($response)) {
$response = $cached_response;
} else {
$cache->set($request, $response);
}
// TODO: Stop using phpxml, switching to DOM/Simple for this
// TODO: Drop lib/phpxml if 0 uses in core/contrib
$xmlobj = XML_unserialize($response);
return $this->render_video_list($xmlobj);
}
/**
* Check cache hit
*/
function checkCacheHit()
{
ilExternalFeed::_createCacheDirectory();
$cache = new RSSCache(MAGPIE_CACHE_DIR, MAGPIE_CACHE_AGE);
$cache_status = 0;
// response of check_cache
$request_headers = array();
// HTTP headers to send with fetch
$rss = 0;
// parsed RSS object
$errormsg = 0;
// errors, if any
$cache_key = $this->getUrl() . MAGPIE_OUTPUT_ENCODING;
if (!$cache->ERROR) {
// return cache HIT, MISS, or STALE
$cache_status = $cache->check_cache($cache_key);
}
// if object cached, and cache is fresh, return cached obj
if ($cache_status == 'HIT') {
return true;
}
return false;
}
<div class="rss_header">
\t<span class="rss_date">[+date+]</span>
\t<a href="[+link+]">[+title+]</a> из <a href="[+feed_link+]">[+feed_description+]</a>
</div>
<div class="rss_text">[+text+]</div>
<a href="[+link+]">[+more+]</a>
</div>
EOF;
$output = '';
$basePath = $modx->config['base_path'];
//Work with cache
if ($cacheAge) {
define(CACHE_DIR, $basePath . $modx->getCachePath());
define(CACHE_AGE, $cacheAge);
require_once $basePath . 'manager/media/rss/rss_cache.inc';
$cache = new RSSCache(CACHE_DIR, CACHE_AGE);
$cache_status = $cache->check_cache($url);
if ($cache_status == 'HIT') {
//have fresh cache
$output = $cache->get($baseurl);
//uncomment this if you want to see and control cache work
//RSS::_log('FROM CACHE');
}
}
if ($output == '') {
//cache is off OR have no cache OR it's STALE
//use system class Snoopy
//this class is used in manager panel to show news on startpage.
require_once $basePath . 'manager/media/rss/extlib/Snoopy.class.inc';
$client = new Snoopy();
$client->agent = 'Mozilla/5.0 (Windows; U; Windows NT 5.1; ru; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13 GTB7.1';
