| 1 |
<?php |
| 2 |
/** |
| 3 |
* Class Minify |
| 4 |
* @package Minify |
| 5 |
*/ |
| 6 |
|
| 7 |
use Psr\Log\LoggerInterface; |
| 8 |
|
| 9 |
/** |
| 10 |
* Minify - Combines, minifies, and caches JavaScript and CSS files on demand. |
| 11 |
* |
| 12 |
* See README for usage instructions (for now). |
| 13 |
* |
| 14 |
* This library was inspired by {@link mailto:flashkot@mail.ru jscsscomp by Maxim Martynyuk} |
| 15 |
* and by the article {@link http://www.hunlock.com/blogs/Supercharged_Javascript "Supercharged JavaScript" by Patrick Hunlock}. |
| 16 |
* |
| 17 |
* @package Minify |
| 18 |
* @author Ryan Grove <ryan@wonko.com> |
| 19 |
* @author Stephen Clay <steve@mrclay.org> |
| 20 |
* @copyright 2008 Ryan Grove, Stephen Clay. All rights reserved. |
| 21 |
* @license http://opensource.org/licenses/bsd-license.php New BSD License |
| 22 |
* @link https://github.com/mrclay/minify |
| 23 |
*/ |
| 24 |
class Minify |
| 25 |
{ |
| 26 |
|
| 27 |
/** |
| 28 |
* API version |
| 29 |
* |
| 30 |
* This is only bumped when API breaks are done and should follow the major version of the library |
| 31 |
* |
| 32 |
* @var int |
| 33 |
*/ |
| 34 |
const VERSION = 3; |
| 35 |
|
| 36 |
const TYPE_CSS = 'text/css'; |
| 37 |
const TYPE_HTML = 'text/html'; |
| 38 |
// there is some debate over the ideal JS Content-Type, but this is the |
| 39 |
// Apache default and what Yahoo! uses.. |
| 40 |
const TYPE_JS = 'application/x-javascript'; |
| 41 |
const URL_DEBUG = 'https://github.com/mrclay/minify/blob/master/docs/Debugging.wiki.md'; |
| 42 |
|
| 43 |
/** |
| 44 |
* Any Minify_Cache_* object or null (i.e. no server cache is used) |
| 45 |
* |
| 46 |
* @var Minify_CacheInterface |
| 47 |
*/ |
| 48 |
private $cache; |
| 49 |
|
| 50 |
/** |
| 51 |
* Active controller for current request |
| 52 |
* |
| 53 |
* @var Minify_Controller_Base |
| 54 |
*/ |
| 55 |
protected $controller; |
| 56 |
|
| 57 |
/** |
| 58 |
* @var Minify_Env |
| 59 |
*/ |
| 60 |
protected $env; |
| 61 |
|
| 62 |
/** |
| 63 |
* @var Minify_SourceInterface[] |
| 64 |
*/ |
| 65 |
protected $sources; |
| 66 |
|
| 67 |
/** |
| 68 |
* @var string |
| 69 |
*/ |
| 70 |
protected $selectionId; |
| 71 |
|
| 72 |
/** |
| 73 |
* Options for current request |
| 74 |
* |
| 75 |
* @var array |
| 76 |
*/ |
| 77 |
protected $options; |
| 78 |
|
| 79 |
/** |
| 80 |
* @var LoggerInterface|null |
| 81 |
*/ |
| 82 |
protected $logger; |
| 83 |
|
| 84 |
/** |
| 85 |
* @param Minify_CacheInterface $cache |
| 86 |
* @param LoggerInterface $logger |
| 87 |
*/ |
| 88 |
public function __construct(Minify_CacheInterface $cache, ?LoggerInterface $logger = null) |
| 89 |
{ |
| 90 |
$this->cache = $cache; |
| 91 |
$this->logger = $logger; |
| 92 |
} |
| 93 |
|
| 94 |
/** |
| 95 |
* Get default Minify options. |
| 96 |
* |
| 97 |
* @return array options for Minify |
| 98 |
*/ |
| 99 |
public function getDefaultOptions() |
| 100 |
{ |
| 101 |
return array( |
| 102 |
'isPublic' => true, |
| 103 |
'encodeOutput' => function_exists('gzdeflate'), |
| 104 |
'encodeMethod' => null, // determine later |
| 105 |
'encodeLevel' => 9, |
| 106 |
|
| 107 |
'minifiers' => array( |
| 108 |
Minify::TYPE_JS => array('JSMin\\JSMin', 'minify'), |
| 109 |
Minify::TYPE_CSS => array('Minify_CSSmin', 'minify'), |
| 110 |
Minify::TYPE_HTML => array('Minify_HTML', 'minify'), |
| 111 |
), |
| 112 |
'minifierOptions' => array(), // no minifier options |
| 113 |
|
| 114 |
'contentTypeCharset' => 'utf-8', |
| 115 |
'maxAge' => 1800, // 30 minutes |
| 116 |
'rewriteCssUris' => true, |
| 117 |
'bubbleCssImports' => false, |
| 118 |
'quiet' => false, // serve() will send headers and output |
| 119 |
'debug' => false, |
| 120 |
'concatOnly' => false, |
| 121 |
'invalidate' => false, |
| 122 |
|
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// if you override these, the response codes MUST be directly after |
| 124 |
// the first space. |
| 125 |
'badRequestHeader' => 'HTTP/1.0 400 Bad Request', |
| 126 |
'errorHeader' => 'HTTP/1.0 500 Internal Server Error', |
| 127 |
|
| 128 |
// callback function to see/modify content of all sources |
| 129 |
'postprocessor' => null, |
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// file to require to load preprocessor |
| 131 |
'postprocessorRequire' => null, |
| 132 |
|
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/** |
| 134 |
* If this string is not empty AND the serve() option 'bubbleCssImports' is |
| 135 |
* NOT set, then serve() will check CSS files for @import declarations that |
| 136 |
* appear too late in the combined stylesheet. If found, serve() will prepend |
| 137 |
* the output with this warning. |
| 138 |
*/ |
| 139 |
'importWarning' => "/* See https://github.com/mrclay/minify/blob/master/docs/CommonProblems.wiki.md#imports-can-appear-in-invalid-locations-in-combined-css-files */\n" |
| 140 |
); |
| 141 |
} |
| 142 |
|
| 143 |
/** |
| 144 |
* Serve a request for a minified file. |
| 145 |
* |
| 146 |
* Here are the available options and defaults: |
| 147 |
* |
| 148 |
* 'isPublic' : send "public" instead of "private" in Cache-Control |
| 149 |
* headers, allowing shared caches to cache the output. (default true) |
| 150 |
* |
| 151 |
* 'quiet' : set to true to have serve() return an array rather than sending |
| 152 |
* any headers/output (default false) |
| 153 |
* |
| 154 |
* 'encodeOutput' : set to false to disable content encoding, and not send |
| 155 |
* the Vary header (default true) |
| 156 |
* |
| 157 |
* 'encodeMethod' : generally you should let this be determined by |
| 158 |
* HTTP_Encoder (leave null), but you can force a particular encoding |
| 159 |
* to be returned, by setting this to 'gzip' or '' (no encoding) |
| 160 |
* |
| 161 |
* 'encodeLevel' : level of encoding compression (0 to 9, default 9) |
| 162 |
* |
| 163 |
* 'contentTypeCharset' : appended to the Content-Type header sent. Set to a falsey |
| 164 |
* value to remove. (default 'utf-8') |
| 165 |
* |
| 166 |
* 'maxAge' : set this to the number of seconds the client should use its cache |
| 167 |
* before revalidating with the server. This sets Cache-Control: max-age and the |
| 168 |
* Expires header. Unlike the old 'setExpires' setting, this setting will NOT |
| 169 |
* prevent conditional GETs. Note this has nothing to do with server-side caching. |
| 170 |
* |
| 171 |
* 'rewriteCssUris' : If true, serve() will automatically set the 'currentDir' |
| 172 |
* minifier option to enable URI rewriting in CSS files (default true) |
| 173 |
* |
| 174 |
* 'bubbleCssImports' : If true, all @import declarations in combined CSS |
| 175 |
* files will be move to the top. Note this may alter effective CSS values |
| 176 |
* due to a change in order. (default false) |
| 177 |
* |
| 178 |
* 'debug' : set to true to minify all sources with the 'Lines' controller, which |
| 179 |
* eases the debugging of combined files. This also prevents 304 responses. |
| 180 |
* @see Minify_Lines::minify() |
| 181 |
* |
| 182 |
* 'concatOnly' : set to true to disable minification and simply concatenate the files. |
| 183 |
* For JS, no minifier will be used. For CSS, only URI rewriting is still performed. |
| 184 |
* |
| 185 |
* 'minifiers' : to override Minify's default choice of minifier function for |
| 186 |
* a particular content-type, specify your callback under the key of the |
| 187 |
* content-type: |
| 188 |
* <code> |
| 189 |
* // call customCssMinifier($css) for all CSS minification |
| 190 |
* $options['minifiers'][Minify::TYPE_CSS] = 'customCssMinifier'; |
| 191 |
* |
| 192 |
* // don't minify Javascript at all |
| 193 |
* $options['minifiers'][Minify::TYPE_JS] = 'Minify::nullMinifier'; |
| 194 |
* </code> |
| 195 |
* |
| 196 |
* 'minifierOptions' : to send options to the minifier function, specify your options |
| 197 |
* under the key of the content-type. E.g. To send the CSS minifier an option: |
| 198 |
* <code> |
| 199 |
* // give CSS minifier array('optionName' => 'optionValue') as 2nd argument |
| 200 |
* $options['minifierOptions'][Minify::TYPE_CSS]['optionName'] = 'optionValue'; |
| 201 |
* </code> |
| 202 |
* |
| 203 |
* 'contentType' : (optional) this is only needed if your file extension is not |
| 204 |
* js/css/html. The given content-type will be sent regardless of source file |
| 205 |
* extension, so this should not be used in a Groups config with other |
| 206 |
* Javascript/CSS files. |
| 207 |
* |
| 208 |
* 'importWarning' : serve() will check CSS files for @import declarations that |
| 209 |
* appear too late in the combined stylesheet. If found, serve() will prepend |
| 210 |
* the output with this warning. To disable this, set this option to empty string. |
| 211 |
* |
| 212 |
* Any controller options are documented in that controller's createConfiguration() method. |
| 213 |
* |
| 214 |
* @param Minify_ControllerInterface $controller instance of subclass of Minify_Controller_Base |
| 215 |
* |
| 216 |
* @param array $options controller/serve options |
| 217 |
* |
| 218 |
* @return null|array if the 'quiet' option is set to true, an array |
| 219 |
* with keys "success" (bool), "statusCode" (int), "content" (string), and |
| 220 |
* "headers" (array). |
| 221 |
* |
| 222 |
* @throws Exception |
| 223 |
*/ |
| 224 |
public function serve(Minify_ControllerInterface $controller, $options = array()) |
| 225 |
{ |
| 226 |
$this->env = $controller->getEnv(); |
| 227 |
|
| 228 |
$options = array_merge($this->getDefaultOptions(), $options); |
| 229 |
|
| 230 |
$config = $controller->createConfiguration($options); |
| 231 |
|
| 232 |
$this->sources = $config->getSources(); |
| 233 |
$this->selectionId = $config->getSelectionId(); |
| 234 |
$this->options = $this->analyzeSources($config->getOptions()); |
| 235 |
|
| 236 |
if (!$this->options['quiet'] && !headers_sent()) { |
| 237 |
ini_set('zlib.output_compression', '0'); |
| 238 |
} |
| 239 |
|
| 240 |
// check request validity |
| 241 |
if (!$this->sources) { |
| 242 |
// invalid request! |
| 243 |
if (! $this->options['quiet']) { |
| 244 |
$this->errorExit($this->options['badRequestHeader'], self::URL_DEBUG); |
| 245 |
} else { |
| 246 |
list(, $statusCode) = explode(' ', $this->options['badRequestHeader']); |
| 247 |
|
| 248 |
return array( |
| 249 |
'success' => false, |
| 250 |
'statusCode' => (int)$statusCode, |
| 251 |
'content' => '', |
| 252 |
'headers' => array(), |
| 253 |
); |
| 254 |
} |
| 255 |
} |
| 256 |
|
| 257 |
$this->controller = $controller; |
| 258 |
|
| 259 |
if ($this->options['debug']) { |
| 260 |
$this->setupDebug(); |
| 261 |
$this->options['maxAge'] = 0; |
| 262 |
} |
| 263 |
|
| 264 |
// determine encoding |
| 265 |
if ($this->options['encodeOutput']) { |
| 266 |
$sendVary = true; |
| 267 |
if ($this->options['encodeMethod'] !== null) { |
| 268 |
// controller specifically requested this |
| 269 |
$contentEncoding = $this->options['encodeMethod']; |
| 270 |
} else { |
| 271 |
// sniff request header |
| 272 |
// depending on what the client accepts, $contentEncoding may be |
| 273 |
// 'x-gzip' while our internal encodeMethod is 'gzip'. Calling |
| 274 |
// getAcceptedEncoding(false, false) leaves out compress and deflate as options. |
| 275 |
$list = HTTP_Encoder::getAcceptedEncoding(false, false); |
| 276 |
list($this->options['encodeMethod'], $contentEncoding) = $list; |
| 277 |
$sendVary = ! HTTP_Encoder::isBuggyIe(); |
| 278 |
} |
| 279 |
} else { |
| 280 |
$this->options['encodeMethod'] = ''; // identity (no encoding) |
| 281 |
} |
| 282 |
|
| 283 |
// check client cache |
| 284 |
$cgOptions = array( |
| 285 |
'lastModifiedTime' => $this->options['lastModifiedTime'], |
| 286 |
'isPublic' => $this->options['isPublic'], |
| 287 |
'encoding' => $this->options['encodeMethod'], |
| 288 |
'invalidate' => $this->options['invalidate'], |
| 289 |
); |
| 290 |
|
| 291 |
if ($this->options['maxAge'] > 0) { |
| 292 |
$cgOptions['maxAge'] = $this->options['maxAge']; |
| 293 |
} elseif ($this->options['debug']) { |
| 294 |
$cgOptions['invalidate'] = true; |
| 295 |
} |
| 296 |
|
| 297 |
$cg = new HTTP_ConditionalGet($cgOptions); |
| 298 |
if ($cg->cacheIsValid) { |
| 299 |
// client's cache is valid |
| 300 |
if (! $this->options['quiet']) { |
| 301 |
$cg->sendHeaders(); |
| 302 |
|
| 303 |
return; |
| 304 |
} |
| 305 |
|
| 306 |
return array( |
| 307 |
'success' => true, |
| 308 |
'statusCode' => 304, |
| 309 |
'content' => '', |
| 310 |
'headers' => $cg->getHeaders(), |
| 311 |
); |
| 312 |
} |
| 313 |
|
| 314 |
// client will need output |
| 315 |
$headers = $cg->getHeaders(); |
| 316 |
unset($cg); |
| 317 |
|
| 318 |
if ($this->options['contentType'] === self::TYPE_CSS && $this->options['rewriteCssUris']) { |
| 319 |
$this->setupUriRewrites(); |
| 320 |
} |
| 321 |
|
| 322 |
if ($this->options['concatOnly']) { |
| 323 |
$this->options['minifiers'][self::TYPE_JS] = false; |
| 324 |
foreach ($this->sources as $key => $source) { |
| 325 |
if ($this->options['contentType'] === self::TYPE_JS) { |
| 326 |
$source->setMinifier('Minify::nullMinifier'); |
| 327 |
} elseif ($this->options['contentType'] === self::TYPE_CSS) { |
| 328 |
$source->setMinifier(array('Minify_CSSmin', 'minify')); |
| 329 |
$sourceOpts = $source->getMinifierOptions(); |
| 330 |
$sourceOpts['compress'] = false; |
| 331 |
$source->setMinifierOptions($sourceOpts); |
| 332 |
} |
| 333 |
} |
| 334 |
} |
| 335 |
|
| 336 |
// check server cache |
| 337 |
if (! $this->options['debug']) { |
| 338 |
// using cache |
| 339 |
// the goal is to use only the cache methods to sniff the length and |
| 340 |
// output the content, as they do not require ever loading the file into |
| 341 |
// memory. |
| 342 |
$cacheId = $this->_getCacheId(); |
| 343 |
$fullCacheId = ($this->options['encodeMethod']) ? $cacheId . '.gz' : $cacheId; |
| 344 |
|
| 345 |
// check cache for valid entry |
| 346 |
$cacheIsReady = $this->cache->isValid($fullCacheId, $this->options['lastModifiedTime']); |
| 347 |
if ($cacheIsReady) { |
| 348 |
$cacheContentLength = $this->cache->getSize($fullCacheId); |
| 349 |
} else { |
| 350 |
// generate & cache content |
| 351 |
try { |
| 352 |
$content = $this->combineMinify(); |
| 353 |
} catch (Exception $e) { |
| 354 |
$this->logger && $this->logger->critical($e->getMessage()); |
| 355 |
if (! $this->options['quiet']) { |
| 356 |
$this->errorExit($this->options['errorHeader'], self::URL_DEBUG); |
| 357 |
} |
| 358 |
throw $e; |
| 359 |
} |
| 360 |
$this->cache->store($cacheId, $content); |
| 361 |
if (function_exists('gzencode') && $this->options['encodeMethod']) { |
| 362 |
$this->cache->store($cacheId . '.gz', gzencode($content, $this->options['encodeLevel'])); |
| 363 |
} |
| 364 |
} |
| 365 |
} else { |
| 366 |
// no cache |
| 367 |
$cacheIsReady = false; |
| 368 |
try { |
| 369 |
$content = $this->combineMinify(); |
| 370 |
} catch (Exception $e) { |
| 371 |
$this->logger && $this->logger->critical($e->getMessage()); |
| 372 |
if (! $this->options['quiet']) { |
| 373 |
$this->errorExit($this->options['errorHeader'], self::URL_DEBUG); |
| 374 |
} |
| 375 |
throw $e; |
| 376 |
} |
| 377 |
} |
| 378 |
if (! $cacheIsReady && $this->options['encodeMethod']) { |
| 379 |
// still need to encode |
| 380 |
$content = gzencode($content, $this->options['encodeLevel']); |
| 381 |
} |
| 382 |
|
| 383 |
// add headers |
| 384 |
if ($cacheIsReady) { |
| 385 |
$headers['Content-Length'] = $cacheContentLength; |
| 386 |
} else { |
| 387 |
if (function_exists('mb_strlen') && ((int)ini_get('mbstring.func_overload') & 2)) { |
| 388 |
$headers['Content-Length'] = mb_strlen($content, '8bit'); |
| 389 |
} else { |
| 390 |
$headers['Content-Length'] = strlen($content); |
| 391 |
} |
| 392 |
} |
| 393 |
|
| 394 |
$headers['Content-Type'] = $this->options['contentType']; |
| 395 |
if ($this->options['contentTypeCharset']) { |
| 396 |
$headers['Content-Type'] .= '; charset=' . $this->options['contentTypeCharset']; |
| 397 |
} |
| 398 |
|
| 399 |
if ($this->options['encodeMethod'] !== '') { |
| 400 |
$headers['Content-Encoding'] = $contentEncoding; |
| 401 |
} |
| 402 |
if ($this->options['encodeOutput'] && $sendVary) { |
| 403 |
$headers['Vary'] = 'Accept-Encoding'; |
| 404 |
} |
| 405 |
|
| 406 |
if (! $this->options['quiet']) { |
| 407 |
// output headers & content |
| 408 |
foreach ($headers as $name => $val) { |
| 409 |
header($name . ': ' . $val); |
| 410 |
} |
| 411 |
if ($cacheIsReady) { |
| 412 |
$this->cache->display($fullCacheId); |
| 413 |
} else { |
| 414 |
echo $content; |
| 415 |
} |
| 416 |
} else { |
| 417 |
return array( |
| 418 |
'success' => true, |
| 419 |
'statusCode' => 200, |
| 420 |
'content' => $cacheIsReady ? $this->cache->fetch($fullCacheId) : $content, |
| 421 |
'headers' => $headers, |
| 422 |
); |
| 423 |
} |
| 424 |
} |
| 425 |
|
| 426 |
/** |
| 427 |
* Return combined minified content for a set of sources |
| 428 |
* |
| 429 |
* No internal caching will be used and the content will not be HTTP encoded. |
| 430 |
* |
| 431 |
* @param array $sources array of filepaths and/or Minify_Source objects |
| 432 |
* |
| 433 |
* @param array $options (optional) array of options for serve. |
| 434 |
* |
| 435 |
* @return string |
| 436 |
*/ |
| 437 |
public function combine($sources, $options = array()) |
| 438 |
{ |
| 439 |
$tmpCache = $this->cache; |
| 440 |
$this->cache = new Minify_Cache_Null(); |
| 441 |
|
| 442 |
$env = new Minify_Env(); |
| 443 |
$sourceFactory = new Minify_Source_Factory($env, array( |
| 444 |
'checkAllowDirs' => false, |
| 445 |
), $this->cache); |
| 446 |
$controller = new Minify_Controller_Files($env, $sourceFactory, $this->logger); |
| 447 |
|
| 448 |
$options = array_merge($options, array( |
| 449 |
'files' => (array)$sources, |
| 450 |
'quiet' => true, |
| 451 |
'encodeMethod' => '', |
| 452 |
'lastModifiedTime' => 0, |
| 453 |
)); |
| 454 |
$out = $this->serve($controller, $options); |
| 455 |
|
| 456 |
$this->cache = $tmpCache; |
| 457 |
|
| 458 |
return $out['content']; |
| 459 |
} |
| 460 |
|
| 461 |
/** |
| 462 |
* Show an error page |
| 463 |
* |
| 464 |
* @param string $header Full header. E.g. 'HTTP/1.0 500 Internal Server Error' |
| 465 |
* @param string $url URL to direct the user to |
| 466 |
* @param string $msgHtml HTML message for the client |
| 467 |
* |
| 468 |
* @return void |
| 469 |
* @internal This is not part of the public API and is subject to change |
| 470 |
* @access private |
| 471 |
*/ |
| 472 |
public function errorExit($header, $url = '', $msgHtml = '') |
| 473 |
{ |
| 474 |
$url = htmlspecialchars($url); |
| 475 |
list(, $h1) = explode(' ', $header, 2); |
| 476 |
$h1 = htmlspecialchars($h1); |
| 477 |
// FastCGI environments require 3rd arg to header() to be set |
| 478 |
list(, $code) = explode(' ', $header, 3); |
| 479 |
header($header, true, $code); |
| 480 |
header('Content-Type: text/html; charset=utf-8'); |
| 481 |
echo "<h1>$h1</h1>"; |
| 482 |
if ($msgHtml) { |
| 483 |
echo $msgHtml; |
| 484 |
} |
| 485 |
if ($url) { |
| 486 |
echo "<p>Please see <a href='$url'>$url</a>.</p>"; |
| 487 |
} |
| 488 |
exit; |
| 489 |
} |
| 490 |
|
| 491 |
/** |
| 492 |
* Default minifier for .min or -min JS files. |
| 493 |
* |
| 494 |
* @param string $content |
| 495 |
* @return string |
| 496 |
*/ |
| 497 |
public static function nullMinifier($content) |
| 498 |
{ |
| 499 |
if (isset($content[0]) && $content[0] === "\xef") { |
| 500 |
$content = substr($content, 3); |
| 501 |
} |
| 502 |
$content = str_replace("\r\n", "\n", $content); |
| 503 |
|
| 504 |
return trim($content); |
| 505 |
} |
| 506 |
|
| 507 |
/** |
| 508 |
* Setup CSS sources for URI rewriting |
| 509 |
*/ |
| 510 |
protected function setupUriRewrites() |
| 511 |
{ |
| 512 |
foreach ($this->sources as $key => $source) { |
| 513 |
$file = $this->env->normalizePath($source->getFilePath()); |
| 514 |
$minifyOptions = $source->getMinifierOptions(); |
| 515 |
|
| 516 |
if ($file |
| 517 |
&& !isset($minifyOptions['currentDir']) |
| 518 |
&& !isset($minifyOptions['prependRelativePath'])) { |
| 519 |
$minifyOptions['currentDir'] = dirname($file); |
| 520 |
$source->setMinifierOptions($minifyOptions); |
| 521 |
} |
| 522 |
} |
| 523 |
} |
| 524 |
|
| 525 |
/** |
| 526 |
* Set up sources to use Minify_Lines |
| 527 |
*/ |
| 528 |
protected function setupDebug() |
| 529 |
{ |
| 530 |
foreach ($this->sources as $source) { |
| 531 |
$source->setMinifier(array('Minify_Lines', 'minify')); |
| 532 |
$id = $source->getId(); |
| 533 |
$source->setMinifierOptions(array( |
| 534 |
'id' => (is_file($id) ? basename($id) : $id), |
| 535 |
)); |
| 536 |
} |
| 537 |
} |
| 538 |
|
| 539 |
/** |
| 540 |
* Combines sources and minifies the result. |
| 541 |
* |
| 542 |
* @return string |
| 543 |
* |
| 544 |
* @throws Exception |
| 545 |
*/ |
| 546 |
protected function combineMinify() |
| 547 |
{ |
| 548 |
$type = $this->options['contentType']; // ease readability |
| 549 |
|
| 550 |
// when combining scripts, make sure all statements separated and |
| 551 |
// trailing single line comment is terminated |
| 552 |
$implodeSeparator = ($type === self::TYPE_JS) ? "\n;" : ''; |
| 553 |
|
| 554 |
// allow the user to pass a particular array of options to each |
| 555 |
// minifier (designated by type). source objects may still override |
| 556 |
// these |
| 557 |
if (isset($this->options['minifierOptions'][$type])) { |
| 558 |
$defaultOptions = $this->options['minifierOptions'][$type]; |
| 559 |
} else { |
| 560 |
$defaultOptions = array(); |
| 561 |
} |
| 562 |
|
| 563 |
// if minifier not set, default is no minification. source objects |
| 564 |
// may still override this |
| 565 |
if (isset($this->options['minifiers'][$type])) { |
| 566 |
$defaultMinifier = $this->options['minifiers'][$type]; |
| 567 |
} else { |
| 568 |
$defaultMinifier = false; |
| 569 |
} |
| 570 |
|
| 571 |
// process groups of sources with identical minifiers/options |
| 572 |
$content = array(); |
| 573 |
$i = 0; |
| 574 |
$l = count($this->sources); |
| 575 |
$groupToProcessTogether = array(); |
| 576 |
$lastMinifier = null; |
| 577 |
$lastOptions = null; |
| 578 |
do { |
| 579 |
// get next source |
| 580 |
$source = null; |
| 581 |
if ($i < $l) { |
| 582 |
$source = $this->sources[$i]; |
| 583 |
$sourceContent = $source->getContent(); |
| 584 |
|
| 585 |
// allow the source to override our minifier and options |
| 586 |
$minifier = $source->getMinifier(); |
| 587 |
if (!$minifier) { |
| 588 |
$minifier = $defaultMinifier; |
| 589 |
} |
| 590 |
$options = array_merge($defaultOptions, $source->getMinifierOptions()); |
| 591 |
} |
| 592 |
// do we need to process our group right now? |
| 593 |
if ($i > 0 // yes, we have at least the first group populated |
| 594 |
&& ( |
| 595 |
! $source // yes, we ran out of sources |
| 596 |
|| $type === self::TYPE_CSS // yes, to process CSS individually (avoiding PCRE bugs/limits) |
| 597 |
|| $minifier !== $lastMinifier // yes, minifier changed |
| 598 |
|| $options !== $lastOptions // yes, options changed |
| 599 |
)) { |
| 600 |
// minify previous sources with last settings |
| 601 |
$imploded = implode($implodeSeparator, $groupToProcessTogether); |
| 602 |
$groupToProcessTogether = array(); |
| 603 |
if ($lastMinifier) { |
| 604 |
try { |
| 605 |
$content[] = call_user_func($lastMinifier, $imploded, $lastOptions); |
| 606 |
} catch (Exception $e) { |
| 607 |
throw new Exception("Exception in minifier: " . $e->getMessage()); |
| 608 |
} |
| 609 |
} else { |
| 610 |
$content[] = $imploded; |
| 611 |
} |
| 612 |
} |
| 613 |
// add content to the group |
| 614 |
if ($source) { |
| 615 |
$groupToProcessTogether[] = $sourceContent; |
| 616 |
$lastMinifier = $minifier; |
| 617 |
$lastOptions = $options; |
| 618 |
} |
| 619 |
$i++; |
| 620 |
} while ($source); |
| 621 |
|
| 622 |
$content = implode($implodeSeparator, $content); |
| 623 |
|
| 624 |
if ($type === self::TYPE_CSS && false !== strpos($content, '@import')) { |
| 625 |
$content = $this->handleCssImports($content); |
| 626 |
} |
| 627 |
|
| 628 |
// do any post-processing (esp. for editing build URIs) |
| 629 |
if ($this->options['postprocessorRequire']) { |
| 630 |
require_once $this->options['postprocessorRequire']; |
| 631 |
} |
| 632 |
if ($this->options['postprocessor']) { |
| 633 |
$content = call_user_func($this->options['postprocessor'], $content, $type); |
| 634 |
} |
| 635 |
|
| 636 |
return $content; |
| 637 |
} |
| 638 |
|
| 639 |
/** |
| 640 |
* Make a unique cache id for for this request. |
| 641 |
* |
| 642 |
* Any settings that could affect output are taken into consideration |
| 643 |
* |
| 644 |
* @param string $prefix |
| 645 |
* |
| 646 |
* @return string |
| 647 |
*/ |
| 648 |
protected function _getCacheId($prefix = 'minify') |
| 649 |
{ |
| 650 |
$name = preg_replace('/[^a-zA-Z0-9\\.=_,]/', '', $this->selectionId); |
| 651 |
$name = preg_replace('/\\.+/', '.', $name); |
| 652 |
$name = substr($name, 0, 100 - 34 - strlen($prefix)); |
| 653 |
$md5 = md5(serialize(array( |
| 654 |
Minify_SourceSet::getDigest($this->sources), |
| 655 |
$this->options['minifiers'], |
| 656 |
$this->options['minifierOptions'], |
| 657 |
$this->options['postprocessor'], |
| 658 |
$this->options['bubbleCssImports'], |
| 659 |
Minify::VERSION, |
| 660 |
))); |
| 661 |
|
| 662 |
return "{$prefix}_{$name}_{$md5}"; |
| 663 |
} |
| 664 |
|
| 665 |
/** |
| 666 |
* Bubble CSS @imports to the top or prepend a warning if an import is detected not at the top. |
| 667 |
* |
| 668 |
* @param string $css |
| 669 |
* |
| 670 |
* @return string |
| 671 |
*/ |
| 672 |
protected function handleCssImports($css) |
| 673 |
{ |
| 674 |
if ($this->options['bubbleCssImports']) { |
| 675 |
// bubble CSS imports |
| 676 |
preg_match_all('/@import.*?;/', $css, $imports); |
| 677 |
$css = implode('', $imports[0]) . preg_replace('/@import.*?;/', '', $css); |
| 678 |
|
| 679 |
return $css; |
| 680 |
} |
| 681 |
|
| 682 |
if ('' === $this->options['importWarning']) { |
| 683 |
return $css; |
| 684 |
} |
| 685 |
|
| 686 |
// remove comments so we don't mistake { in a comment as a block |
| 687 |
$noCommentCss = preg_replace('@/\\*[\\s\\S]*?\\*/@', '', $css); |
| 688 |
$lastImportPos = strrpos($noCommentCss, '@import'); |
| 689 |
$firstBlockPos = strpos($noCommentCss, '{'); |
| 690 |
if (false !== $lastImportPos |
| 691 |
&& false !== $firstBlockPos |
| 692 |
&& $firstBlockPos < $lastImportPos |
| 693 |
) { |
| 694 |
// { appears before @import : prepend warning |
| 695 |
$css = $this->options['importWarning'] . $css; |
| 696 |
} |
| 697 |
|
| 698 |
return $css; |
| 699 |
} |
| 700 |
|
| 701 |
/** |
| 702 |
* Analyze sources (if there are any) and set $options 'contentType' |
| 703 |
* and 'lastModifiedTime' if they already aren't. |
| 704 |
* |
| 705 |
* @param array $options options for Minify |
| 706 |
* |
| 707 |
* @return array options for Minify |
| 708 |
*/ |
| 709 |
protected function analyzeSources($options = array()) |
| 710 |
{ |
| 711 |
if (!$this->sources) { |
| 712 |
return $options; |
| 713 |
} |
| 714 |
|
| 715 |
$type = null; |
| 716 |
foreach ($this->sources as $source) { |
| 717 |
$sourceType = $source->getContentType(); |
| 718 |
|
| 719 |
if (!empty($options['contentType'])) { |
| 720 |
// just verify sources have null content type or match the options |
| 721 |
if ($sourceType !== null && $sourceType !== $options['contentType']) { |
| 722 |
$this->logger && $this->logger->warning("ContentType mismatch: '{$sourceType}' != '{$options['contentType']}'"); |
| 723 |
|
| 724 |
$this->sources = array(); |
| 725 |
|
| 726 |
return $options; |
| 727 |
} |
| 728 |
|
| 729 |
continue; |
| 730 |
} |
| 731 |
|
| 732 |
if ($type === null) { |
| 733 |
$type = $sourceType; |
| 734 |
} elseif ($sourceType !== $type) { |
| 735 |
$this->logger && $this->logger->warning("ContentType mismatch: '{$sourceType}' != '{$type}'"); |
| 736 |
|
| 737 |
$this->sources = array(); |
| 738 |
|
| 739 |
return $options; |
| 740 |
} |
| 741 |
} |
| 742 |
|
| 743 |
if (empty($options['contentType'])) { |
| 744 |
if (null === $type) { |
| 745 |
$type = 'text/plain'; |
| 746 |
} |
| 747 |
$options['contentType'] = $type; |
| 748 |
} |
| 749 |
|
| 750 |
// last modified is needed for caching, even if setExpires is set |
| 751 |
if (!isset($options['lastModifiedTime'])) { |
| 752 |
$max = 0; |
| 753 |
foreach ($this->sources as $source) { |
| 754 |
$max = max($source->getLastModified(), $max); |
| 755 |
} |
| 756 |
$options['lastModifiedTime'] = $max; |
| 757 |
} |
| 758 |
|
| 759 |
return $options; |
| 760 |
} |
| 761 |
} |
| 762 |
|
