public static function hasCachedResponse(LinkedDataApiRequest $request)
{
if (!function_exists("memcache_connect")) {
return false;
}
$acceptableTypes = $request->getAcceptTypes();
$uri = $request->uri;
foreach ($acceptableTypes as $mimetype) {
$key = LinkedDataApiCache::cacheKey($uri, $mimetype);
$mc = memcache_connect(PUELIA_MEMCACHE_HOST, PUELIA_MEMCACHE_PORT);
$cachedObject = $mc->get($key);
if ($cachedObject) {
logDebug("Found a cached response for {$mimetype} under key {$key}");
return $cachedObject;
}
logDebug("No cached response for {$mimetype} under key {$key}");
}
logDebug('No suitable cached responses found');
return false;
}
require 'deployment.settings.php';
require_once 'lda.inc.php';
require 'setup.php';
require_once 'lda-cache.class.php';
require_once 'lda-request.class.php';
require_once 'lda-response.class.php';
require_once 'graphs/configgraph.class.php';
require_once 'responses/Response304.class.php';
Logger::configure("puelia.logging.properties");
$HttpRequestFactory = new HttpRequestFactory();
if (function_exists('memcache_connect')) {
$MemCacheObject = new LinkedDataApiCache();
$HttpRequestFactory->set_cache($MemCacheObject);
}
$Request = new LinkedDataApiRequest();
header("Access-Control-Allow-Origin: *");
define("CONFIG_PATH", '/api-config');
define("CONFIG_URL", $Request->getBaseAndSubDir() . CONFIG_PATH);
logDebug("Request URI: " . $Request->getUri());
if (rtrim($Request->getPath(), '/') == $Request->getInstallSubDir()) {
header("Location: " . CONFIG_URL, true, 303);
exit;
}
if (defined("PUELIA_SERVE_FROM_CACHE") and !$Request->hasNoCacheHeader() and $cachedResponse = LinkedDataApiCache::hasCachedResponse($Request)) {
logDebug("Found cached response");
if (isset($Request->ifNoneMatch) && $cachedResponse->eTag == $Request->ifNoneMatch) {
logDebug("ETag matched, returning 304");
$Response = new Response304($cachedResponse);
} else {
if (isset($Request->ifModifiedSince) && $cachedResponse->generatedTime <= $Request->ifModifiedSince) {
public static function cacheResponse(LinkedDataApiRequest $request, LinkedDataApiResponse $response)
{
if (!function_exists("memcache_connect")) {
return false;
}
$cacheableResponse = new LinkedDataApiCachedResponse();
$cacheableResponse->eTag = $response->eTag;
$cacheableResponse->generatedTime = $response->generatedTime;
$cacheableResponse->lastModified = $response->lastModified;
$cacheableResponse->mimetype = $response->mimetype;
$cacheableResponse->body = $response->body;
$key = LinkedDataApiCache::cacheKey($request->getOrderedUriWithoutApiKeys(), $cacheableResponse->mimetype);
logDebug('Caching Response as ' . $key . ' with mimetype ' . $cacheableResponse->mimetype);
$mc = memcache_connect(PUELIA_MEMCACHE_HOST, PUELIA_MEMCACHE_PORT);
$mc->add($key, $cacheableResponse, false, PUELIA_CACHE_AGE);
}