Rss-Bridge/actions/DisplayAction.php
logmanoriginal 556a417dd6 core: Add support for custom cache types via config.ini.php
This commit adds support for a new parameter which specifies the type
of cache to use for caching. It is specified in config.ini.php:

 [cache]

 type = "..."

Currently only one type of cache is supported (see /caches). All uses
of 'FileCache' were replaced by this configuration option.

Note: Caching currently depends on files and folders (due to FileCache).
Experience may vary depending on the selected cache type. For now always
check if FileCache is working before testing alternative types.

References #1000
2019-02-06 18:52:44 +01:00

234 lines
6 KiB
PHP

<?php
/**
* This file is part of RSS-Bridge, a PHP project capable of generating RSS and
* Atom feeds for websites that don't have one.
*
* For the full license information, please view the UNLICENSE file distributed
* with this source code.
*
* @package Core
* @license http://unlicense.org/ UNLICENSE
* @link https://github.com/rss-bridge/rss-bridge
*/
class DisplayAction extends ActionAbstract {
public function execute() {
$bridge = array_key_exists('bridge', $this->userData) ? $this->userData['bridge'] : null;
$format = $this->userData['format']
or returnClientError('You must specify a format!');
// DEPRECATED: 'nameFormat' scheme is replaced by 'name' in format parameter values
// this is to keep compatibility until futher complete removal
if(($pos = strpos($format, 'Format')) === (strlen($format) - strlen('Format'))) {
$format = substr($format, 0, $pos);
}
// whitelist control
if(!Bridge::isWhitelisted($bridge)) {
throw new \Exception('This bridge is not whitelisted', 401);
die;
}
// Data retrieval
$bridge = Bridge::create($bridge);
$noproxy = array_key_exists('_noproxy', $this->userData)
&& filter_var($this->userData['_noproxy'], FILTER_VALIDATE_BOOLEAN);
if(defined('PROXY_URL') && PROXY_BYBRIDGE && $noproxy) {
define('NOPROXY', true);
}
// Cache timeout
$cache_timeout = -1;
if(array_key_exists('_cache_timeout', $this->userData)) {
if(!CUSTOM_CACHE_TIMEOUT) {
unset($this->userData['_cache_timeout']);
$uri = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH) . '?' . http_build_query($this->userData);
header('Location: ' . $uri, true, 301);
die();
}
$cache_timeout = filter_var($this->userData['_cache_timeout'], FILTER_VALIDATE_INT);
} else {
$cache_timeout = $bridge->getCacheTimeout();
}
// Remove parameters that don't concern bridges
$bridge_params = array_diff_key(
$this->userData,
array_fill_keys(
array(
'action',
'bridge',
'format',
'_noproxy',
'_cache_timeout',
'_error_time'
), '')
);
// Remove parameters that don't concern caches
$cache_params = array_diff_key(
$this->userData,
array_fill_keys(
array(
'action',
'format',
'_noproxy',
'_cache_timeout',
'_error_time'
), '')
);
// Initialize cache
$cache = Cache::create(Configuration::getConfig('cache', 'type'));
$cache->setPath(PATH_CACHE);
$cache->purgeCache(86400); // 24 hours
$cache->setParameters($cache_params);
$items = array();
$infos = array();
$mtime = $cache->getTime();
if($mtime !== false
&& (time() - $cache_timeout < $mtime)
&& !Debug::isEnabled()) { // Load cached data
// Send "Not Modified" response if client supports it
// Implementation based on https://stackoverflow.com/a/10847262
if(isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
$stime = strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']);
if($mtime <= $stime) { // Cached data is older or same
header('Last-Modified: ' . gmdate('D, d M Y H:i:s ', $mtime) . 'GMT', true, 304);
die();
}
}
$cached = $cache->loadData();
if(isset($cached['items']) && isset($cached['extraInfos'])) {
foreach($cached['items'] as $item) {
$items[] = new \FeedItem($item);
}
$infos = $cached['extraInfos'];
}
} else { // Collect new data
try {
$bridge->setDatas($bridge_params);
$bridge->collectData();
$items = $bridge->getItems();
// Transform "legacy" items to FeedItems if necessary.
// Remove this code when support for "legacy" items ends!
if(isset($items[0]) && is_array($items[0])) {
$feedItems = array();
foreach($items as $item) {
$feedItems[] = new \FeedItem($item);
}
$items = $feedItems;
}
$infos = array(
'name' => $bridge->getName(),
'uri' => $bridge->getURI(),
'icon' => $bridge->getIcon()
);
} catch(Error $e) {
error_log($e);
$item = new \FeedItem();
// Create "new" error message every 24 hours
$this->userData['_error_time'] = urlencode((int)(time() / 86400));
// Error 0 is a special case (i.e. "trying to get property of non-object")
if($e->getCode() === 0) {
$item->setTitle(
'Bridge encountered an unexpected situation! ('
. $this->userData['_error_time']
. ')'
);
} else {
$item->setTitle(
'Bridge returned error '
. $e->getCode()
. '! ('
. $this->userData['_error_time']
. ')'
);
}
$item->setURI(
(isset($_SERVER['REQUEST_URI']) ? parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH) : '')
. '?'
. http_build_query($this->userData)
);
$item->setTimestamp(time());
$item->setContent(buildBridgeException($e, $bridge));
$items[] = $item;
} catch(Exception $e) {
error_log($e);
$item = new \FeedItem();
// Create "new" error message every 24 hours
$this->userData['_error_time'] = urlencode((int)(time() / 86400));
$item->setURI(
(isset($_SERVER['REQUEST_URI']) ? parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH) : '')
. '?'
. http_build_query($this->userData)
);
$item->setTitle(
'Bridge returned error '
. $e->getCode()
. '! ('
. $this->userData['_error_time']
. ')'
);
$item->setTimestamp(time());
$item->setContent(buildBridgeException($e, $bridge));
$items[] = $item;
}
// Store data in cache
$cache->saveData(array(
'items' => array_map(function($i){ return $i->toArray(); }, $items),
'extraInfos' => $infos
));
}
// Data transformation
try {
$format = Format::create($format);
$format->setItems($items);
$format->setExtraInfos($infos);
$format->setLastModified($cache->getTime());
$format->display();
} catch(Error $e) {
error_log($e);
header('Content-Type: text/html', true, $e->getCode());
die(buildTransformException($e, $bridge));
} catch(Exception $e) {
error_log($e);
header('Content-Type: text/html', true, $e->getCode());
die(buildTransformException($e, $bridge));
}
}
}