/**
* Get lessphp cache object
*
* @return array
*/
private function getCache()
{
// cache for single run
// so that getLastModified and getContent in single request do not add additional cache roundtrips (i.e memcache)
if (isset($this->parsed)) {
return $this->parsed;
}
// check from cache first
$cache = null;
$cacheId = $this->getCacheId();
if ($this->cache->isValid($cacheId, 0)) {
if ($cache = $this->cache->fetch($cacheId)) {
$cache = unserialize($cache);
}
}
$less = $this->getCompiler();
$input = $cache ? $cache : $this->filepath;
$cache = $less->cachedCompile($input);
if (!is_array($input) || $cache['updated'] > $input['updated']) {
$this->cache->store($cacheId, serialize($cache));
}
return $this->parsed = $cache;
}
/**
* 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);
}
}