533 lines
20 KiB
PHP
533 lines
20 KiB
PHP
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<?php
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/**
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* Class Minify
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* @package Minify
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*/
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/**
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* Minify_Source
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*/
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require_once 'Minify/Source.php';
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/**
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* Minify - Combines, minifies, and caches JavaScript and CSS files on demand.
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*
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* See README for usage instructions (for now).
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*
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* This library was inspired by {@link mailto:flashkot@mail.ru jscsscomp by Maxim Martynyuk}
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* and by the article {@link http://www.hunlock.com/blogs/Supercharged_Javascript "Supercharged JavaScript" by Patrick Hunlock}.
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*
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* Requires PHP 5.1.0.
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* Tested on PHP 5.1.6.
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*
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* @package Minify
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* @author Ryan Grove <ryan@wonko.com>
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* @author Stephen Clay <steve@mrclay.org>
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* @copyright 2008 Ryan Grove, Stephen Clay. All rights reserved.
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* @license http://opensource.org/licenses/bsd-license.php New BSD License
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* @link http://code.google.com/p/minify/
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*/
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class Minify {
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const VERSION = '2.1.3';
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const TYPE_CSS = 'text/css';
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const TYPE_HTML = 'text/html';
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// there is some debate over the ideal JS Content-Type, but this is the
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// Apache default and what Yahoo! uses..
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const TYPE_JS = 'application/x-javascript';
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/**
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* How many hours behind are the file modification times of uploaded files?
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*
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* If you upload files from Windows to a non-Windows server, Windows may report
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* incorrect mtimes for the files. Immediately after modifying and uploading a
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* file, use the touch command to update the mtime on the server. If the mtime
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* jumps ahead by a number of hours, set this variable to that number. If the mtime
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* moves back, this should not be needed.
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*
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* @var int $uploaderHoursBehind
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*/
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public static $uploaderHoursBehind = 0;
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/**
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* If this string is not empty AND the serve() option 'bubbleCssImports' is
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* NOT set, then serve() will check CSS files for @import declarations that
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* appear too late in the combined stylesheet. If found, serve() will prepend
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* the output with this warning.
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*
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* @var string $importWarning
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*/
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public static $importWarning = "/* See http://code.google.com/p/minify/wiki/CommonProblems#@imports_can_appear_in_invalid_locations_in_combined_CSS_files */\n";
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/**
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* Specify a cache object (with identical interface as Minify_Cache_File) or
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* a path to use with Minify_Cache_File.
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*
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* If not called, Minify will not use a cache and, for each 200 response, will
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* need to recombine files, minify and encode the output.
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*
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* @param mixed $cache object with identical interface as Minify_Cache_File or
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* a directory path, or null to disable caching. (default = '')
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*
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* @param bool $fileLocking (default = true) This only applies if the first
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* parameter is a string.
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*
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* @return null
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*/
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public static function setCache($cache = '', $fileLocking = true)
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{
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if (is_string($cache)) {
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require_once 'Minify/Cache/File.php';
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self::$_cache = new Minify_Cache_File($cache, $fileLocking);
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} else {
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self::$_cache = $cache;
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}
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}
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/**
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* Serve a request for a minified file.
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*
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* Here are the available options and defaults in the base controller:
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*
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* 'isPublic' : send "public" instead of "private" in Cache-Control
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* headers, allowing shared caches to cache the output. (default true)
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*
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* 'quiet' : set to true to have serve() return an array rather than sending
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* any headers/output (default false)
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*
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* 'encodeOutput' : set to false to disable content encoding, and not send
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* the Vary header (default true)
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*
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* 'encodeMethod' : generally you should let this be determined by
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* HTTP_Encoder (leave null), but you can force a particular encoding
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* to be returned, by setting this to 'gzip' or '' (no encoding)
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*
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* 'encodeLevel' : level of encoding compression (0 to 9, default 9)
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*
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* 'contentTypeCharset' : appended to the Content-Type header sent. Set to a falsey
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* value to remove. (default 'utf-8')
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*
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* 'maxAge' : set this to the number of seconds the client should use its cache
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* before revalidating with the server. This sets Cache-Control: max-age and the
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* Expires header. Unlike the old 'setExpires' setting, this setting will NOT
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* prevent conditional GETs. Note this has nothing to do with server-side caching.
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*
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* 'rewriteCssUris' : If true, serve() will automatically set the 'currentDir'
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* minifier option to enable URI rewriting in CSS files (default true)
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*
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* 'bubbleCssImports' : If true, all @import declarations in combined CSS
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* files will be move to the top. Note this may alter effective CSS values
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* due to a change in order. (default false)
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*
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* 'debug' : set to true to minify all sources with the 'Lines' controller, which
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* eases the debugging of combined files. This also prevents 304 responses.
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* @see Minify_Lines::minify()
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*
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* 'minifiers' : to override Minify's default choice of minifier function for
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* a particular content-type, specify your callback under the key of the
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* content-type:
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* <code>
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* // call customCssMinifier($css) for all CSS minification
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* $options['minifiers'][Minify::TYPE_CSS] = 'customCssMinifier';
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*
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* // don't minify Javascript at all
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* $options['minifiers'][Minify::TYPE_JS] = '';
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* </code>
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*
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* 'minifierOptions' : to send options to the minifier function, specify your options
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* under the key of the content-type. E.g. To send the CSS minifier an option:
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* <code>
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* // give CSS minifier array('optionName' => 'optionValue') as 2nd argument
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* $options['minifierOptions'][Minify::TYPE_CSS]['optionName'] = 'optionValue';
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* </code>
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*
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* 'contentType' : (optional) this is only needed if your file extension is not
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* js/css/html. The given content-type will be sent regardless of source file
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* extension, so this should not be used in a Groups config with other
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* Javascript/CSS files.
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*
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* Any controller options are documented in that controller's setupSources() method.
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*
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* @param mixed instance of subclass of Minify_Controller_Base or string name of
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* controller. E.g. 'Files'
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*
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* @param array $options controller/serve options
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*
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* @return mixed null, or, if the 'quiet' option is set to true, an array
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* with keys "success" (bool), "statusCode" (int), "content" (string), and
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* "headers" (array).
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*/
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public static function serve($controller, $options = array())
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{
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if (is_string($controller)) {
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// make $controller into object
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$class = 'Minify_Controller_' . $controller;
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if (! class_exists($class, false)) {
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require_once "Minify/Controller/"
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. str_replace('_', '/', $controller) . ".php";
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}
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$controller = new $class();
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}
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// set up controller sources and mix remaining options with
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// controller defaults
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$options = $controller->setupSources($options);
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$options = $controller->analyzeSources($options);
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self::$_options = $controller->mixInDefaultOptions($options);
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// check request validity
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if (! $controller->sources) {
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// invalid request!
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if (! self::$_options['quiet']) {
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header(self::$_options['badRequestHeader']);
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echo self::$_options['badRequestHeader'];
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return;
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} else {
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list(,$statusCode) = explode(' ', self::$_options['badRequestHeader']);
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return array(
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'success' => false
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,'statusCode' => (int)$statusCode
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,'content' => ''
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,'headers' => array()
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);
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}
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}
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self::$_controller = $controller;
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if (self::$_options['debug']) {
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self::_setupDebug($controller->sources);
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self::$_options['maxAge'] = 0;
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}
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// determine encoding
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if (self::$_options['encodeOutput']) {
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if (self::$_options['encodeMethod'] !== null) {
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// controller specifically requested this
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$contentEncoding = self::$_options['encodeMethod'];
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} else {
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// sniff request header
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require_once 'HTTP/Encoder.php';
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// depending on what the client accepts, $contentEncoding may be
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// 'x-gzip' while our internal encodeMethod is 'gzip'. Calling
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// getAcceptedEncoding(false, false) leaves out compress and deflate as options.
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list(self::$_options['encodeMethod'], $contentEncoding) = HTTP_Encoder::getAcceptedEncoding(false, false);
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}
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} else {
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self::$_options['encodeMethod'] = ''; // identity (no encoding)
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}
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// check client cache
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require_once 'HTTP/ConditionalGet.php';
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$cgOptions = array(
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'lastModifiedTime' => self::$_options['lastModifiedTime']
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,'isPublic' => self::$_options['isPublic']
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,'encoding' => self::$_options['encodeMethod']
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);
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if (self::$_options['maxAge'] > 0) {
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$cgOptions['maxAge'] = self::$_options['maxAge'];
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}
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$cg = new HTTP_ConditionalGet($cgOptions);
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if ($cg->cacheIsValid) {
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// client's cache is valid
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if (! self::$_options['quiet']) {
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$cg->sendHeaders();
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return;
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} else {
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return array(
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'success' => true
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,'statusCode' => 304
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,'content' => ''
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,'headers' => $cg->getHeaders()
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);
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}
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} else {
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// client will need output
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$headers = $cg->getHeaders();
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unset($cg);
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}
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if (self::$_options['contentType'] === self::TYPE_CSS
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&& self::$_options['rewriteCssUris']) {
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reset($controller->sources);
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while (list($key, $source) = each($controller->sources)) {
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if ($source->filepath
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&& !isset($source->minifyOptions['currentDir'])
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&& !isset($source->minifyOptions['prependRelativePath'])
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) {
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$source->minifyOptions['currentDir'] = dirname($source->filepath);
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}
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}
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}
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// check server cache
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if (null !== self::$_cache) {
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// using cache
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// the goal is to use only the cache methods to sniff the length and
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// output the content, as they do not require ever loading the file into
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// memory.
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$cacheId = 'minify_' . self::_getCacheId();
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$fullCacheId = (self::$_options['encodeMethod'])
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? $cacheId . '.gz'
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: $cacheId;
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// check cache for valid entry
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$cacheIsReady = self::$_cache->isValid($fullCacheId, self::$_options['lastModifiedTime']);
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if ($cacheIsReady) {
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$cacheContentLength = self::$_cache->getSize($fullCacheId);
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} else {
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// generate & cache content
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$content = self::_combineMinify();
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self::$_cache->store($cacheId, $content);
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if (function_exists('gzencode')) {
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self::$_cache->store($cacheId . '.gz', gzencode($content, self::$_options['encodeLevel']));
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}
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}
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} else {
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// no cache
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$cacheIsReady = false;
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$content = self::_combineMinify();
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}
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if (! $cacheIsReady && self::$_options['encodeMethod']) {
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// still need to encode
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$content = gzencode($content, self::$_options['encodeLevel']);
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}
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// add headers
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$headers['Content-Length'] = $cacheIsReady
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? $cacheContentLength
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: strlen($content);
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$headers['Content-Type'] = self::$_options['contentTypeCharset']
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? self::$_options['contentType'] . '; charset=' . self::$_options['contentTypeCharset']
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: self::$_options['contentType'];
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if (self::$_options['encodeMethod'] !== '') {
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$headers['Content-Encoding'] = $contentEncoding;
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}
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if (self::$_options['encodeOutput']) {
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$headers['Vary'] = 'Accept-Encoding';
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}
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if (! self::$_options['quiet']) {
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// output headers & content
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foreach ($headers as $name => $val) {
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header($name . ': ' . $val);
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}
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if ($cacheIsReady) {
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self::$_cache->display($fullCacheId);
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} else {
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echo $content;
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}
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} else {
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return array(
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'success' => true
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,'statusCode' => 200
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,'content' => $cacheIsReady
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? self::$_cache->fetch($fullCacheId)
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: $content
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,'headers' => $headers
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);
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}
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}
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/**
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* Return combined minified content for a set of sources
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*
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* No internal caching will be used and the content will not be HTTP encoded.
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*
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* @param array $sources array of filepaths and/or Minify_Source objects
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*
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* @param array $options (optional) array of options for serve. By default
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* these are already set: quiet = true, encodeMethod = '', lastModifiedTime = 0.
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*
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* @return string
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*/
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public static function combine($sources, $options = array())
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{
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$cache = self::$_cache;
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self::$_cache = null;
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$options = array_merge(array(
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'files' => (array)$sources
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,'quiet' => true
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,'encodeMethod' => ''
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,'lastModifiedTime' => 0
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), $options);
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$out = self::serve('Files', $options);
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self::$_cache = $cache;
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return $out['content'];
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}
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/**
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* On IIS, create $_SERVER['DOCUMENT_ROOT']
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*
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* @param bool $unsetPathInfo (default false) if true, $_SERVER['PATH_INFO']
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* will be unset (it is inconsistent with Apache's setting)
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*
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* @return null
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*/
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||
|
|
public static function setDocRoot($unsetPathInfo = false)
|
||
|
|
{
|
||
|
|
if (isset($_SERVER['SERVER_SOFTWARE'])
|
||
|
|
&& 0 === strpos($_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS/')
|
||
|
|
) {
|
||
|
|
$_SERVER['DOCUMENT_ROOT'] = rtrim(substr(
|
||
|
|
$_SERVER['PATH_TRANSLATED']
|
||
|
|
,0
|
||
|
|
,strlen($_SERVER['PATH_TRANSLATED']) - strlen($_SERVER['SCRIPT_NAME'])
|
||
|
|
), '\\');
|
||
|
|
if ($unsetPathInfo) {
|
||
|
|
unset($_SERVER['PATH_INFO']);
|
||
|
|
}
|
||
|
|
require_once 'Minify/Logger.php';
|
||
|
|
Minify_Logger::log("setDocRoot() set DOCUMENT_ROOT to \"{$_SERVER['DOCUMENT_ROOT']}\"");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @var mixed Minify_Cache_* object or null (i.e. no server cache is used)
|
||
|
|
*/
|
||
|
|
private static $_cache = null;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @var Minify_Controller active controller for current request
|
||
|
|
*/
|
||
|
|
protected static $_controller = null;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @var array options for current request
|
||
|
|
*/
|
||
|
|
protected static $_options = null;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Set up sources to use Minify_Lines
|
||
|
|
*
|
||
|
|
* @param array $sources Minify_Source instances
|
||
|
|
*
|
||
|
|
* @return null
|
||
|
|
*/
|
||
|
|
protected static function _setupDebug($sources)
|
||
|
|
{
|
||
|
|
foreach ($sources as $source) {
|
||
|
|
$source->minifier = array('Minify_Lines', 'minify');
|
||
|
|
$id = $source->getId();
|
||
|
|
$source->minifyOptions = array(
|
||
|
|
'id' => (is_file($id) ? basename($id) : $id)
|
||
|
|
);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Combines sources and minifies the result.
|
||
|
|
*
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
protected static function _combineMinify()
|
||
|
|
{
|
||
|
|
$type = self::$_options['contentType']; // ease readability
|
||
|
|
|
||
|
|
// when combining scripts, make sure all statements separated and
|
||
|
|
// trailing single line comment is terminated
|
||
|
|
$implodeSeparator = ($type === self::TYPE_JS)
|
||
|
|
? "\n;"
|
||
|
|
: '';
|
||
|
|
// allow the user to pass a particular array of options to each
|
||
|
|
// minifier (designated by type). source objects may still override
|
||
|
|
// these
|
||
|
|
$defaultOptions = isset(self::$_options['minifierOptions'][$type])
|
||
|
|
? self::$_options['minifierOptions'][$type]
|
||
|
|
: array();
|
||
|
|
// if minifier not set, default is no minification. source objects
|
||
|
|
// may still override this
|
||
|
|
$defaultMinifier = isset(self::$_options['minifiers'][$type])
|
||
|
|
? self::$_options['minifiers'][$type]
|
||
|
|
: false;
|
||
|
|
|
||
|
|
if (Minify_Source::haveNoMinifyPrefs(self::$_controller->sources)) {
|
||
|
|
// all source have same options/minifier, better performance
|
||
|
|
// to combine, then minify once
|
||
|
|
foreach (self::$_controller->sources as $source) {
|
||
|
|
$pieces[] = $source->getContent();
|
||
|
|
}
|
||
|
|
$content = implode($implodeSeparator, $pieces);
|
||
|
|
if ($defaultMinifier) {
|
||
|
|
self::$_controller->loadMinifier($defaultMinifier);
|
||
|
|
$content = call_user_func($defaultMinifier, $content, $defaultOptions);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
// minify each source with its own options and minifier, then combine
|
||
|
|
foreach (self::$_controller->sources as $source) {
|
||
|
|
// allow the source to override our minifier and options
|
||
|
|
$minifier = (null !== $source->minifier)
|
||
|
|
? $source->minifier
|
||
|
|
: $defaultMinifier;
|
||
|
|
$options = (null !== $source->minifyOptions)
|
||
|
|
? array_merge($defaultOptions, $source->minifyOptions)
|
||
|
|
: $defaultOptions;
|
||
|
|
if ($minifier) {
|
||
|
|
self::$_controller->loadMinifier($minifier);
|
||
|
|
// get source content and minify it
|
||
|
|
$pieces[] = call_user_func($minifier, $source->getContent(), $options);
|
||
|
|
} else {
|
||
|
|
$pieces[] = $source->getContent();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
$content = implode($implodeSeparator, $pieces);
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($type === self::TYPE_CSS && false !== strpos($content, '@import')) {
|
||
|
|
$content = self::_handleCssImports($content);
|
||
|
|
}
|
||
|
|
|
||
|
|
// do any post-processing (esp. for editing build URIs)
|
||
|
|
if (self::$_options['postprocessorRequire']) {
|
||
|
|
require_once self::$_options['postprocessorRequire'];
|
||
|
|
}
|
||
|
|
if (self::$_options['postprocessor']) {
|
||
|
|
$content = call_user_func(self::$_options['postprocessor'], $content, $type);
|
||
|
|
}
|
||
|
|
return $content;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Make a unique cache id for for this request.
|
||
|
|
*
|
||
|
|
* Any settings that could affect output are taken into consideration
|
||
|
|
*
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
protected static function _getCacheId()
|
||
|
|
{
|
||
|
|
return md5(serialize(array(
|
||
|
|
Minify_Source::getDigest(self::$_controller->sources)
|
||
|
|
,self::$_options['minifiers']
|
||
|
|
,self::$_options['minifierOptions']
|
||
|
|
,self::$_options['postprocessor']
|
||
|
|
,self::$_options['bubbleCssImports']
|
||
|
|
)));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Bubble CSS @imports to the top or prepend a warning if an
|
||
|
|
* @import is detected not at the top.
|
||
|
|
*/
|
||
|
|
protected static function _handleCssImports($css)
|
||
|
|
{
|
||
|
|
if (self::$_options['bubbleCssImports']) {
|
||
|
|
// bubble CSS imports
|
||
|
|
preg_match_all('/@import.*?;/', $css, $imports);
|
||
|
|
$css = implode('', $imports[0]) . preg_replace('/@import.*?;/', '', $css);
|
||
|
|
} else if ('' !== self::$importWarning) {
|
||
|
|
// remove comments so we don't mistake { in a comment as a block
|
||
|
|
$noCommentCss = preg_replace('@/\\*[\\s\\S]*?\\*/@', '', $css);
|
||
|
|
$lastImportPos = strrpos($noCommentCss, '@import');
|
||
|
|
$firstBlockPos = strpos($noCommentCss, '{');
|
||
|
|
if (false !== $lastImportPos
|
||
|
|
&& false !== $firstBlockPos
|
||
|
|
&& $firstBlockPos < $lastImportPos
|
||
|
|
) {
|
||
|
|
// { appears before @import : prepend warning
|
||
|
|
$css = self::$importWarning . $css;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return $css;
|
||
|
|
}
|
||
|
|
}
|