public function resolve(Request $request, Response $response) { // Then request params if (empty($locale)) { $locale = $request->meta('locale'); } // User preference if (empty($request->user)) { $locale = @$request->user['locale']; } // Accept from HTTP headers if (empty($locale)) { $locale = Locale::acceptFromHttp($request->header('Accept-Language')); } // TODO: Use Locale::lookup(); and its fallback mechanism for $this->defaultLocale. // TODO: Locale::getPrimaryLanguage() should be useful. // Default locale if (empty($locale)) { $locale = $this->defaultLocale; } if (!empty($locale)) { if ($request->meta('locale') != $locale) { $response->cookie('__locale', $locale, FRAMEWORK_COOKIE_EXPIRE_TIME, '/'); } $response->translation(new Translation($locale)); } }
public function resolve(Request $request, Response $response) { $path = $this->srcPath . $request->uri('path') . '.url'; // Check if target file is a proxy. if (!is_file($path)) { return; } $cacheTarget = parse_ini_file($path); $cacheTarget = @$cacheTarget['URL']; unset($path); if (!$cacheTarget) { Log::warning('Proxy file has not URL parameter.', array('requestUri' => $request->uri(), 'proxyFile' => $request->uri('path') . '.uri')); $response->status(502); // Bad Gateway return; } /*! Cache Header Notes * * # Cache-Control * [public | private] Cacheable when public, otherwise the client is responsible for caching. * [no-cache( \w+)?] When no fields are specified, the whole thing must revalidate everytime, * otherwise cache it except specified fields. * [no-store] Ignore caching and pipe into output. * [max-age=\d+] Seconds before this cache is meant to expire, this overrides Expires header. * [s-maxage=\d+] Overrides max-age and Expires header, behaves just like max-age. * (This is for CDN and we are using it.) * [must-revalidate] Tells those CDNs which are intended to serve stale contents to revalidate every time. * [proxy-revalidate] Like the "s-" version of max-age, a "must-revalidate" override only for CDN. * [no-transform] Some CDNs will optimize images and other formats, this "opt-out" of it. * * # Expires * RFC timestamp for an absolute cache expiration, overridden by Cache-Control header. * * # ETag * Hash of anything, weak ETags is not supported at this moment. * * # vary * Too much fun inside and we are too serious about caching, ignore this. * * # pragma * This guy is too old to recognize. * [no-cache] Only this is known nowadays and is already succeed by Cache-Control: no-cache. * */ // note; Use "cache-meta://" scheme for header and cache meta info, for performance. // 1. Check if cache exists. $cache = (array) Cache::get("cache-meta://{$cacheTarget}"); // Cache expiration, in seconds. // expires = ( s-maxage || max-age || Expires ); if (@$cache['expires'] && time() > $cache['expires']) { Cache::delete("cache-meta://{$cacheTarget}"); Cache::delete("cache://{$cacheTarget}"); $cache = null; } // - If not exists, make normal request to remote server. // - If exists, make conditional request to remote server. // - Revalidation, we can skip this request and serve the content if false. // revalidates = ( Cache-Control:proxy-revalidate || Cache-Control:must-revalidate ) if (!$cache || @$cache['revalidates']) { $_request = array('uri' => $cacheTarget); if ($cache) { // Last-Modified if (@$cache['headers']['Last-Modified']) { $_request['headers']['If-Modified-Since'] = $cache['Last-Modified']; } // Entity-Tag if (@$cache['headers']['ETag'] && strpos($cache['headers']['ETag'], 'W\\') !== 0) { $_request['headers']['If-None-Match'] = $cache['ETag']; } } else { $cache = array(); } // Make the request $_response = new Response(array('autoOutput' => false)); (new Request($_request))->send(null, $_response); unset($_request); // parse headers into cache settings. if (in_array($_response->status(), array(200, 304))) { $res = preg_split('/\\s*,\\s*/', util::unwrapAssoc($_response->header('Cache-Control'))); $res = array_reduce($res, function ($res, $value) { // todo; Take care of no-cache with field name. if (strpos($value, '=') > 0) { $value = explode('=', $value); $res[$value[0]] = $value[1]; } else { $res[$value] = true; } return $res; }, array()); // private, no-store, no-cache if (@$res['private'] || @$res['no-store'] || @$res['no-cache']) { // note; in case the upstream server change this to uncacheable Cache::delete("cache-meta://{$cacheTarget}"); Cache::delete("cache://{$cacheTarget}"); $_response->clearBody(); } if ($_response->status() == 200 && $_response->body()) { $cache['contents'] = $_response->body(); } // expires = ( s-maxage || max-age || Expires ); if (@$res['s-maxage']) { $cache['expires'] = time() + $res['s-maxage']; } elseif (@$res['max-age']) { $cache['expires'] = time() + $res['max-age']; } else { $res = util::unwrapAssoc($_response->header('Expires')); if ($res) { $cache['expires'] = strtotime($res); } } // revalidates = ( Cache-Control:proxy-revalidate || Cache-Control:must-revalidate ) if (@$res['proxy-revalidate'] || @$res['must-revalidate']) { $cache['revalidates'] = true; } unset($res); } $cache['headers'] = array_map('core\\Utility::unwrapAssoc', $_response->header()); // PHP does not support chunked, skip this one. unset($cache['headers']['Transfer-Encoding']); // note; If cache is to be ignored, the $cacheTarget variable will be already unset(). if (isset($cacheTarget)) { if (@$cache['contents']) { Cache::set("cache://{$cacheTarget}", $cache['contents']); } Cache::set("cache-meta://{$cacheTarget}", array_filter_keys($cache, isNot('contents'))); } unset($_response); } // note; Send cache headers regardless of the request condition. if (@$cache['headers']) { $response->clearHeaders(); foreach ($cache['headers'] as $name => $value) { $response->header($name, $value, true); } unset($name, $value); } // note; Handles conditional request $ch = array_map('core\\Utility::unwrapAssoc', (array) @$cache['headers']); $mtime = @$ch['Last-Modified'] ? strtotime($ch['Last-Modified']) : false; // Request headr: If-Modified-Since if (@$ch['Last-Modified'] && $mtime) { if (strtotime($request->header('If-Modified-Since')) >= $mtime) { return $response->status(304); } } // Request header: If-Range if ($request->header('If-Range')) { // Entity tag if (strpos(substr($request->header('If-Range'), 0, 2), '"') !== false && @$ch['ETag']) { if ($this->compareETags(@$ch['ETag'], $request->header('If-Range'))) { return $this->response()->status(304); } } elseif (strtotime($request->header('If-Range')) === $mtime) { return $this->response()->status(304); } } unset($mtime); // Request header: If-None-Match if (!$request->header('If-Modified-Since') && $request->header('If-None-Match')) { // Exists but not GET or HEAD switch ($request->method()) { case 'get': case 'head': break; default: return $this->response()->status(412); } /*! Note by Vicary @ 24 Jan, 2013 * If-None-Match means 304 when target resources exists. */ if ($request->header('If-None-Match') === '*' && @$ch['ETag']) { return $this->response()->status(304); } if ($this->compareETags(@$ch['ETag'], preg_split('/\\s*,\\s*/', $request->header('If-None-Match')))) { return $this->response()->status(304); } } // Request header: If-Match if (!$request->header('If-Modified-Since') && $request->header('If-Match')) { // Exists but not GET or HEAD switch ($request->method()) { case 'get': case 'head': break; default: return $this->response()->status(412); } if ($request->header('If-Match') === '*' && !@$ch['ETag']) { return $this->response()->status(412); } preg_match_all('/(?:^\\*$|(:?"([^\\*"]+)")(?:\\s*,\\s*(:?"([^\\*"]+)")))$/', $request->header('If-Match'), $eTags); // 412 Precondition Failed when nothing matches. if (@$eTags[1] && !in_array($eTag, (array) $eTags[1])) { return $this->response()->status(412); } } if ($cacheTarget && empty($cache['contents'])) { $cache['contents'] = Cache::get("cache://{$cacheTarget}"); } // Output the cahce content $response->send($cache['contents'], 200); }