private static function _checkClientCache() { require_once 'HTTP/ConditionalGet.php'; $cgOptions = array('lastModifiedTime' => 0, 'isPublic' => true, 'encoding' => '', 'maxAge' => 1800); $cg = new HTTP_ConditionalGet($cgOptions); if (MINCO_CLIENT_CACHE && $cg->cacheIsValid) { // client's cache is valid $cg->sendHeaders(); return true; } else { // client will need output self::$_headers = $cg->getHeaders(); unset($cg); } return false; }
/** * Serve a request for a minified file. * * Here are the available options and defaults in the base controller: * * 'isPublic' : send "public" instead of "private" in Cache-Control * headers, allowing shared caches to cache the output. (default true) * * 'quiet' : set to true to have serve() return an array rather than sending * any headers/output (default false) * * 'encodeOutput' : set to false to disable content encoding, and not send * the Vary header (default true) * * 'encodeMethod' : generally you should let this be determined by * HTTP_Encoder (leave null), but you can force a particular encoding * to be returned, by setting this to 'gzip' or '' (no encoding) * * 'encodeLevel' : level of encoding compression (0 to 9, default 9) * * 'contentTypeCharset' : appended to the Content-Type header sent. Set to a falsey * value to remove. (default 'utf-8') * * 'maxAge' : set this to the number of seconds the client should use its cache * before revalidating with the server. This sets Cache-Control: max-age and the * Expires header. Unlike the old 'setExpires' setting, this setting will NOT * prevent conditional GETs. Note this has nothing to do with server-side caching. * * 'rewriteCssUris' : If true, serve() will automatically set the 'currentDir' * minifier option to enable URI rewriting in CSS files (default true) * * 'bubbleCssImports' : If true, all @import declarations in combined CSS * files will be move to the top. Note this may alter effective CSS values * due to a change in order. (default false) * * 'debug' : set to true to minify all sources with the 'Lines' controller, which * eases the debugging of combined files. This also prevents 304 responses. * @see Minify_Lines::minify() * * 'minifiers' : to override Minify's default choice of minifier function for * a particular content-type, specify your callback under the key of the * content-type: * <code> * // call customCssMinifier($css) for all CSS minification * $options['minifiers'][Minify::TYPE_CSS] = 'customCssMinifier'; * * // don't minify Javascript at all * $options['minifiers'][Minify::TYPE_JS] = ''; * </code> * * 'minifierOptions' : to send options to the minifier function, specify your options * under the key of the content-type. E.g. To send the CSS minifier an option: * <code> * // give CSS minifier array('optionName' => 'optionValue') as 2nd argument * $options['minifierOptions'][Minify::TYPE_CSS]['optionName'] = 'optionValue'; * </code> * * 'contentType' : (optional) this is only needed if your file extension is not * js/css/html. The given content-type will be sent regardless of source file * extension, so this should not be used in a Groups config with other * Javascript/CSS files. * * Any controller options are documented in that controller's setupSources() method. * * @param mixed $controller instance of subclass of Minify_Controller_Base or string * name of controller. E.g. 'Files' * * @param array $options controller/serve options * * @return mixed null, or, if the 'quiet' option is set to true, an array * with keys "success" (bool), "statusCode" (int), "content" (string), and * "headers" (array). */ public static function serve($controller, $options = array()) { if (!self::$isDocRootSet && 0 === stripos(PHP_OS, 'win')) { self::setDocRoot(); } if (is_string($controller)) { // make $controller into object $class = 'Minify_Controller_' . $controller; if (!class_exists($class, false)) { require_once "Minify/Controller/" . str_replace('_', '/', $controller) . ".php"; } $controller = new $class(); /* @var Minify_Controller_Base $controller */ } // set up controller sources and mix remaining options with // controller defaults $options = $controller->setupSources($options); $options = $controller->analyzeSources($options); self::$_options = $controller->mixInDefaultOptions($options); // check request validity if (!$controller->sources) { // invalid request! if (!self::$_options['quiet']) { self::_errorExit(self::$_options['badRequestHeader'], self::URL_DEBUG); } else { list(, $statusCode) = explode(' ', self::$_options['badRequestHeader']); return array('success' => false, 'statusCode' => (int) $statusCode, 'content' => '', 'headers' => array()); } } self::$_controller = $controller; if (self::$_options['debug']) { self::_setupDebug($controller->sources); self::$_options['maxAge'] = 0; } // determine encoding if (self::$_options['encodeOutput']) { $sendVary = true; if (self::$_options['encodeMethod'] !== null) { // controller specifically requested this $contentEncoding = self::$_options['encodeMethod']; } else { // sniff request header require_once 'HTTP/Encoder.php'; // depending on what the client accepts, $contentEncoding may be // 'x-gzip' while our internal encodeMethod is 'gzip'. Calling // getAcceptedEncoding(false, false) leaves out compress and deflate as options. list(self::$_options['encodeMethod'], $contentEncoding) = HTTP_Encoder::getAcceptedEncoding(false, false); $sendVary = !HTTP_Encoder::isBuggyIe(); } } else { self::$_options['encodeMethod'] = ''; // identity (no encoding) } // check client cache require_once 'HTTP/ConditionalGet.php'; $cgOptions = array('lastModifiedTime' => self::$_options['lastModifiedTime'], 'isPublic' => self::$_options['isPublic'], 'encoding' => self::$_options['encodeMethod']); if (self::$_options['maxAge'] > 0) { $cgOptions['maxAge'] = self::$_options['maxAge']; } elseif (self::$_options['debug']) { $cgOptions['invalidate'] = true; } $cg = new HTTP_ConditionalGet($cgOptions); if ($cg->cacheIsValid) { // client's cache is valid if (!self::$_options['quiet']) { $cg->sendHeaders(); return; } else { return array('success' => true, 'statusCode' => 304, 'content' => '', 'headers' => $cg->getHeaders()); } } else { // client will need output $headers = $cg->getHeaders(); unset($cg); } if (self::$_options['contentType'] === self::TYPE_CSS && self::$_options['rewriteCssUris']) { foreach ($controller->sources as $key => $source) { if ($source->filepath && !isset($source->minifyOptions['currentDir']) && !isset($source->minifyOptions['prependRelativePath'])) { $source->minifyOptions['currentDir'] = dirname($source->filepath); } } } // check server cache if (null !== self::$_cache && !self::$_options['debug']) { // using cache // the goal is to use only the cache methods to sniff the length and // output the content, as they do not require ever loading the file into // memory. $cacheId = self::_getCacheId(); $fullCacheId = self::$_options['encodeMethod'] ? $cacheId . '.gz' : $cacheId; // check cache for valid entry $cacheIsReady = self::$_cache->isValid($fullCacheId, self::$_options['lastModifiedTime']); if ($cacheIsReady) { $cacheContentLength = self::$_cache->getSize($fullCacheId); } else { // generate & cache content try { $content = self::_combineMinify(); } catch (Exception $e) { self::$_controller->log($e->getMessage()); if (!self::$_options['quiet']) { self::_errorExit(self::$_options['errorHeader'], self::URL_DEBUG); } throw $e; } self::$_cache->store($cacheId, $content); if (function_exists('gzencode')) { self::$_cache->store($cacheId . '.gz', gzencode($content, self::$_options['encodeLevel'])); } } } else { // no cache $cacheIsReady = false; try { $content = self::_combineMinify(); } catch (Exception $e) { self::$_controller->log($e->getMessage()); if (!self::$_options['quiet']) { self::_errorExit(self::$_options['errorHeader'], self::URL_DEBUG); } throw $e; } } if (!$cacheIsReady && self::$_options['encodeMethod']) { // still need to encode $content = gzencode($content, self::$_options['encodeLevel']); } // add headers $headers['Content-Length'] = $cacheIsReady ? $cacheContentLength : (function_exists('mb_strlen') && (int) ini_get('mbstring.func_overload') & 2 ? mb_strlen($content, '8bit') : strlen($content)); $headers['Content-Type'] = self::$_options['contentTypeCharset'] ? self::$_options['contentType'] . '; charset=' . self::$_options['contentTypeCharset'] : self::$_options['contentType']; if (self::$_options['encodeMethod'] !== '') { $headers['Content-Encoding'] = $contentEncoding; } if (self::$_options['encodeOutput'] && $sendVary) { $headers['Vary'] = 'Accept-Encoding'; } if (!self::$_options['quiet']) { // output headers & content foreach ($headers as $name => $val) { header($name . ': ' . $val); } if ($cacheIsReady) { self::$_cache->display($fullCacheId); } else { echo $content; } } else { return array('success' => true, 'statusCode' => 200, 'content' => $cacheIsReady ? self::$_cache->fetch($fullCacheId) : $content, 'headers' => $headers); } }
/** * Exit if the client's cache is valid for this resource * * This is a convenience method for common use of the class * * @param int $lastModifiedTime if given, both ETag AND Last-Modified headers * will be sent with content. This is recommended. * * @param bool $isPublic (default false) if true, the Cache-Control header * will contain "public", allowing proxies to cache the content. Otherwise * "private" will be sent, allowing only browser caching. * * @param array $options (default empty) additional options for constructor */ public static function check($lastModifiedTime = null, $isPublic = false, $options = array()) { if (null !== $lastModifiedTime) { $options['lastModifiedTime'] = (int) $lastModifiedTime; } $options['isPublic'] = (bool) $isPublic; $cg = new HTTP_ConditionalGet($options); $cg->sendHeaders(); if ($cg->cacheIsValid) { exit; } }
<?php set_include_path(get_include_path() . PATH_SEPARATOR . realpath(dirname(__FILE__) . '/../../min/lib')); require 'HTTP/ConditionalGet.php'; // generate content first (not ideal) // emulate regularly updating document $every = 20; $lastModified = round(time() / $every) * $every - $every; $title = 'Last-Modified is unknown : use hash of content for ETag'; $explain = ' <p>When Last-Modified is unknown, you can still use ETags, but you need a short string that is unique for that content. In the worst case, you have to generate all the content first, <em>then</em> instantiate HTTP_ConditionalGet, setting the array key <code>contentHash</code> to the output of a hash function of the content. Since we have the full content, we might as well also use <code>setContentLength(strlen($content))</code> in the case where we need to send it.</p> <p>This script emulates a document that changes every ' . $every . ' seconds. <br>This is version: ' . date('r', $lastModified) . '</p> '; require '_include.php'; $content = get_content(array('title' => $title, 'explain' => $explain)); $cg = new HTTP_ConditionalGet(array('contentHash' => substr(md5($content), 7))); if ($cg->cacheIsValid) { $cg->sendHeaders(); // we're done exit; } $cg->setContentLength(strlen($content)); $cg->sendHeaders(); send_slowly($content);
/** * Echoes the Javascript if not cached. * * Echoes the javascript with the correct content. * Since the content is dinamic, i use the hash function. * * @param string $javascript * * @return void */ private function _echo_javascript($javascript) { $conditional_get = new HTTP_ConditionalGet(array('contentHash' => md5($javascript))); $conditional_get->sendHeaders(); if (!$conditional_get->cacheIsValid) { $http_encoder = $this->_registry->get('http.encoder', array('content' => $javascript, 'type' => 'text/javascript')); $compression_level = null; if ($this->_registry->get('model.settings')->get('disable_gzip_compression')) { // set the compression level to 0 to disable it. $compression_level = 0; } $http_encoder->encode($compression_level); $http_encoder->sendAll(); } Ai1ec_Http_Response_Helper::stop(0); }
/** * Serve a request for a minified file. * * Here are the available options and defaults in the base controller: * * 'isPublic' : send "public" instead of "private" in Cache-Control * headers, allowing shared caches to cache the output. (default true) * * 'quiet' : set to true to have serve() return an array rather than sending * any headers/output (default false) * * 'encodeOutput' : set to false to disable content encoding, and not send * the Vary header (default true) * * 'encodeMethod' : generally you should let this be determined by * HTTP_Encoder (leave null), but you can force a particular encoding * to be returned, by setting this to 'gzip' or '' (no encoding) * * 'encodeLevel' : level of encoding compression (0 to 9, default 9) * * 'contentTypeCharset' : appended to the Content-Type header sent. Set to a falsey * value to remove. (default 'utf-8') * * 'maxAge' : set this to the number of seconds the client should use its cache * before revalidating with the server. This sets Cache-Control: max-age and the * Expires header. Unlike the old 'setExpires' setting, this setting will NOT * prevent conditional GETs. Note this has nothing to do with server-side caching. * * 'rewriteCssUris' : If true, serve() will automatically set the 'currentDir' * minifier option to enable URI rewriting in CSS files (default true) * * 'bubbleCssImports' : If true, all @import declarations in combined CSS * files will be move to the top. Note this may alter effective CSS values * due to a change in order. (default false) * * 'debug' : set to true to minify all sources with the 'Lines' controller, which * eases the debugging of combined files. This also prevents 304 responses. * @see Minify_Lines::minify() * * 'minifiers' : to override Minify's default choice of minifier function for * a particular content-type, specify your callback under the key of the * content-type: * <code> * // call customCssMinifier($css) for all CSS minification * $options['minifiers'][Minify::TYPE_CSS] = 'customCssMinifier'; * * // don't minify Javascript at all * $options['minifiers'][Minify::TYPE_JS] = ''; * </code> * * 'minifierOptions' : to send options to the minifier function, specify your options * under the key of the content-type. E.g. To send the CSS minifier an option: * <code> * // give CSS minifier array('optionName' => 'optionValue') as 2nd argument * $options['minifierOptions'][Minify::TYPE_CSS]['optionName'] = 'optionValue'; * </code> * * 'contentType' : (optional) this is only needed if your file extension is not * js/css/html. The given content-type will be sent regardless of source file * extension, so this should not be used in a Groups config with other * Javascript/CSS files. * * Any controller options are documented in that controller's setupSources() method. * * @param mixed instance of subclass of Minify_Controller_Base or string name of * controller. E.g. 'Files' * * @param array $options controller/serve options * * @return mixed null, or, if the 'quiet' option is set to true, an array * with keys "success" (bool), "statusCode" (int), "content" (string), and * "headers" (array). */ public static function serve($controller, $options = array()) { if (is_string($controller)) { // make $controller into object $class = 'Minify_Controller_' . $controller; if (!class_exists($class, false)) { require_once W3TC_LIB_MINIFY_DIR . "/Minify/Controller/" . str_replace('_', '/', $controller) . ".php"; } $controller = new $class(); } // set up controller sources and mix remaining options with // controller defaults $options = $controller->setupSources($options); $options = $controller->analyzeSources($options); self::$_options = $controller->mixInDefaultOptions($options); // check request validity if (!$controller->sources) { // invalid request! if (!self::$_options['quiet']) { header(self::$_options['badRequestHeader']); echo self::$_options['badRequestHeader']; return; } else { list(, $statusCode) = explode(' ', self::$_options['badRequestHeader']); return array('success' => false, 'statusCode' => (int) $statusCode, 'content' => '', 'headers' => array()); } } self::$_controller = $controller; if (self::$_options['debug']) { self::_setupDebug($controller->sources); self::$_options['maxAge'] = 0; } // determine encoding if (self::$_options['encodeOutput']) { if (self::$_options['encodeMethod'] !== null) { // controller specifically requested this $contentEncoding = self::$_options['encodeMethod']; } else { // sniff request header require_once W3TC_LIB_MINIFY_DIR . '/HTTP/Encoder.php'; // depending on what the client accepts, $contentEncoding may be // 'x-gzip' while our internal encodeMethod is 'gzip'. Calling // getAcceptedEncoding(false, false) leaves out compress and deflate as options. list(self::$_options['encodeMethod'], $contentEncoding) = HTTP_Encoder::getAcceptedEncoding(self::$_options['encodeOutput']); } } else { self::$_options['encodeMethod'] = ''; // identity (no encoding) } // check client cache require_once W3TC_LIB_MINIFY_DIR . '/HTTP/ConditionalGet.php'; $cgOptions = array('cacheHeaders' => self::$_options['cacheHeaders'], 'lastModifiedTime' => self::$_options['lastModifiedTime'], 'isPublic' => self::$_options['isPublic'], 'encoding' => self::$_options['encodeMethod']); if (self::$_options['maxAge'] > 0) { $cgOptions['maxAge'] = self::$_options['maxAge']; } $cg = new HTTP_ConditionalGet($cgOptions); if ($cg->cacheIsValid) { // client's cache is valid if (!self::$_options['quiet']) { $cg->sendHeaders(); return; } else { return array('success' => true, 'statusCode' => 304, 'content' => '', 'headers' => $cg->getHeaders()); } } else { // client will need output $headers = $cg->getHeaders(); unset($cg); } if (self::$_options['contentType'] === self::TYPE_CSS) { reset($controller->sources); while (list($key, $source) = each($controller->sources)) { if (self::$_options['rewriteCssUris'] && $source->filepath && !isset($source->minifyOptions['currentDir']) && !isset($source->minifyOptions['prependRelativePath'])) { $source->minifyOptions['currentDir'] = dirname($source->filepath); } $source->minifyOptions['processCssImports'] = self::$_options['processCssImports']; } } // check server cache if (null !== self::$_cache) { // using cache // the goal is to use only the cache methods to sniff the length and // output the content, as they do not require ever loading the file into // memory. $cacheId = self::_getCacheId(); $fullCacheId = self::$_options['encodeMethod'] ? $cacheId . '.' . self::$_options['encodeMethod'] : $cacheId; // check cache for valid entry $cacheIsReady = self::$_cache->isValid($fullCacheId, self::$_options['lastModifiedTime']); if ($cacheIsReady) { $cacheContentLength = self::$_cache->getSize($fullCacheId); } else { // generate & cache content $content = self::_combineMinify(); self::$_cache->store($cacheId, $content); if (self::$_options['encodeOutput'] && function_exists('gzencode')) { self::$_cache->store($cacheId . '.' . self::$_options['encodeMethod'], gzencode($content, self::$_options['encodeLevel'])); } } } else { // no cache $cacheIsReady = false; $content = self::_combineMinify(); } if (!$cacheIsReady) { switch (self::$_options['encodeMethod']) { case 'gzip': $content = gzencode($content, self::$_options['encodeLevel']); break; case 'deflate': $content = gzdeflate($content, self::$_options['encodeLevel']); break; } // still need to encode } // add headers $headers['Content-Length'] = $cacheIsReady ? $cacheContentLength : strlen($content); $headers['Content-Type'] = self::$_options['contentTypeCharset'] ? self::$_options['contentType'] . '; charset=' . self::$_options['contentTypeCharset'] : self::$_options['contentType']; if (self::$_options['encodeMethod'] !== '') { $headers['Content-Encoding'] = $contentEncoding; } if (self::$_options['encodeOutput']) { $headers['Vary'] = 'Accept-Encoding'; } if (!self::$_options['quiet']) { // output headers & content foreach ($headers as $name => $val) { header($name . ': ' . $val); } if ($cacheIsReady) { self::$_cache->display($fullCacheId); } else { echo $content; } } else { return array('success' => true, 'statusCode' => 200, 'content' => $cacheIsReady ? self::$_cache->fetch($fullCacheId) : $content, 'headers' => $headers); } }
/** * Serve a request for a minified file. * * Here are the available options and defaults: * * 'isPublic' : send "public" instead of "private" in Cache-Control * headers, allowing shared caches to cache the output. (default true) * * 'quiet' : set to true to have serve() return an array rather than sending * any headers/output (default false) * * 'encodeOutput' : set to false to disable content encoding, and not send * the Vary header (default true) * * 'encodeMethod' : generally you should let this be determined by * HTTP_Encoder (leave null), but you can force a particular encoding * to be returned, by setting this to 'gzip' or '' (no encoding) * * 'encodeLevel' : level of encoding compression (0 to 9, default 9) * * 'contentTypeCharset' : appended to the Content-Type header sent. Set to a falsey * value to remove. (default 'utf-8') * * 'maxAge' : set this to the number of seconds the client should use its cache * before revalidating with the server. This sets Cache-Control: max-age and the * Expires header. Unlike the old 'setExpires' setting, this setting will NOT * prevent conditional GETs. Note this has nothing to do with server-side caching. * * 'rewriteCssUris' : If true, serve() will automatically set the 'currentDir' * minifier option to enable URI rewriting in CSS files (default true) * * 'bubbleCssImports' : If true, all @import declarations in combined CSS * files will be move to the top. Note this may alter effective CSS values * due to a change in order. (default false) * * 'debug' : set to true to minify all sources with the 'Lines' controller, which * eases the debugging of combined files. This also prevents 304 responses. * @see Minify_Lines::minify() * * 'concatOnly' : set to true to disable minification and simply concatenate the files. * For JS, no minifier will be used. For CSS, only URI rewriting is still performed. * * 'minifiers' : to override Minify's default choice of minifier function for * a particular content-type, specify your callback under the key of the * content-type: * <code> * // call customCssMinifier($css) for all CSS minification * $options['minifiers'][Minify::TYPE_CSS] = 'customCssMinifier'; * * // don't minify Javascript at all * $options['minifiers'][Minify::TYPE_JS] = ''; * </code> * * 'minifierOptions' : to send options to the minifier function, specify your options * under the key of the content-type. E.g. To send the CSS minifier an option: * <code> * // give CSS minifier array('optionName' => 'optionValue') as 2nd argument * $options['minifierOptions'][Minify::TYPE_CSS]['optionName'] = 'optionValue'; * </code> * * 'contentType' : (optional) this is only needed if your file extension is not * js/css/html. The given content-type will be sent regardless of source file * extension, so this should not be used in a Groups config with other * Javascript/CSS files. * * 'importWarning' : serve() will check CSS files for @import declarations that * appear too late in the combined stylesheet. If found, serve() will prepend * the output with this warning. To disable this, set this option to empty string. * * Any controller options are documented in that controller's createConfiguration() method. * * @param Minify_ControllerInterface $controller instance of subclass of Minify_Controller_Base * * @param array $options controller/serve options * * @return null|array if the 'quiet' option is set to true, an array * with keys "success" (bool), "statusCode" (int), "content" (string), and * "headers" (array). * * @throws Exception */ public function serve(Minify_ControllerInterface $controller, $options = array()) { $options = array_merge($this->getDefaultOptions(), $options); $config = $controller->createConfiguration($options); $this->sources = $config->getSources(); $this->selectionId = $config->getSelectionId(); $this->options = $this->analyzeSources($config->getOptions()); // check request validity if (!$this->sources) { // invalid request! if (!$this->options['quiet']) { $this->errorExit($this->options['badRequestHeader'], self::URL_DEBUG); } else { list(, $statusCode) = explode(' ', $this->options['badRequestHeader']); return array('success' => false, 'statusCode' => (int) $statusCode, 'content' => '', 'headers' => array()); } } $this->controller = $controller; if ($this->options['debug']) { $this->setupDebug(); $this->options['maxAge'] = 0; } // determine encoding if ($this->options['encodeOutput']) { $sendVary = true; if ($this->options['encodeMethod'] !== null) { // controller specifically requested this $contentEncoding = $this->options['encodeMethod']; } else { // sniff request header // depending on what the client accepts, $contentEncoding may be // 'x-gzip' while our internal encodeMethod is 'gzip'. Calling // getAcceptedEncoding(false, false) leaves out compress and deflate as options. list($this->options['encodeMethod'], $contentEncoding) = HTTP_Encoder::getAcceptedEncoding(false, false); $sendVary = !HTTP_Encoder::isBuggyIe(); } } else { $this->options['encodeMethod'] = ''; // identity (no encoding) } // check client cache $cgOptions = array('lastModifiedTime' => $this->options['lastModifiedTime'], 'isPublic' => $this->options['isPublic'], 'encoding' => $this->options['encodeMethod']); if ($this->options['maxAge'] > 0) { $cgOptions['maxAge'] = $this->options['maxAge']; } elseif ($this->options['debug']) { $cgOptions['invalidate'] = true; } $cg = new HTTP_ConditionalGet($cgOptions); if ($cg->cacheIsValid) { // client's cache is valid if (!$this->options['quiet']) { $cg->sendHeaders(); return; } else { return array('success' => true, 'statusCode' => 304, 'content' => '', 'headers' => $cg->getHeaders()); } } else { // client will need output $headers = $cg->getHeaders(); unset($cg); } if ($this->options['contentType'] === self::TYPE_CSS && $this->options['rewriteCssUris']) { $this->setupUriRewrites(); } if ($this->options['concatOnly']) { $this->options['minifiers'][self::TYPE_JS] = false; foreach ($this->sources as $key => $source) { if ($this->options['contentType'] === self::TYPE_JS) { $source->setMinifier(""); } elseif ($this->options['contentType'] === self::TYPE_CSS) { $source->setMinifier(array('Minify_CSSmin', 'minify')); $sourceOpts = $source->getMinifierOptions(); $sourceOpts['compress'] = false; $source->setMinifierOptions($sourceOpts); } } } // check server cache if (!$this->options['debug']) { // using cache // the goal is to use only the cache methods to sniff the length and // output the content, as they do not require ever loading the file into // memory. $cacheId = $this->_getCacheId(); $fullCacheId = $this->options['encodeMethod'] ? $cacheId . '.gz' : $cacheId; // check cache for valid entry $cacheIsReady = $this->cache->isValid($fullCacheId, $this->options['lastModifiedTime']); if ($cacheIsReady) { $cacheContentLength = $this->cache->getSize($fullCacheId); } else { // generate & cache content try { $content = $this->combineMinify(); } catch (Exception $e) { $this->controller->log($e->getMessage()); if (!$this->options['quiet']) { $this->errorExit($this->options['errorHeader'], self::URL_DEBUG); } throw $e; } $this->cache->store($cacheId, $content); if (function_exists('gzencode') && $this->options['encodeMethod']) { $this->cache->store($cacheId . '.gz', gzencode($content, $this->options['encodeLevel'])); } } } else { // no cache $cacheIsReady = false; try { $content = $this->combineMinify(); } catch (Exception $e) { $this->controller->log($e->getMessage()); if (!$this->options['quiet']) { $this->errorExit($this->options['errorHeader'], self::URL_DEBUG); } throw $e; } } if (!$cacheIsReady && $this->options['encodeMethod']) { // still need to encode $content = gzencode($content, $this->options['encodeLevel']); } // add headers if ($cacheIsReady) { $headers['Content-Length'] = $cacheContentLength; } else { if (function_exists('mb_strlen') && (int) ini_get('mbstring.func_overload') & 2) { $headers['Content-Length'] = mb_strlen($content, '8bit'); } else { $headers['Content-Length'] = strlen($content); } } $headers['Content-Type'] = $this->options['contentType']; if ($this->options['contentTypeCharset']) { $headers['Content-Type'] .= '; charset=' . $this->options['contentTypeCharset']; } if ($this->options['encodeMethod'] !== '') { $headers['Content-Encoding'] = $contentEncoding; } if ($this->options['encodeOutput'] && $sendVary) { $headers['Vary'] = 'Accept-Encoding'; } if (!$this->options['quiet']) { // output headers & content foreach ($headers as $name => $val) { header($name . ': ' . $val); } if ($cacheIsReady) { $this->cache->display($fullCacheId); } else { echo $content; } } else { return array('success' => true, 'statusCode' => 200, 'content' => $cacheIsReady ? $this->cache->fetch($fullCacheId) : $content, 'headers' => $headers); } }