361 lines
7.8 KiB
PHP
361 lines
7.8 KiB
PHP
<?php declare(strict_types=1);
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/**
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* Hummingbird Anime List Client
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*
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* An API client for Kitsu and MyAnimeList to manage anime and manga watch lists
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*
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* PHP version 7
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*
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* @package HummingbirdAnimeClient
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* @author Timothy J. Warren <tim@timshomepage.net>
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* @copyright 2015 - 2017 Timothy J. Warren
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* @license http://www.opensource.org/licenses/mit-license.html MIT License
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* @version 4.0
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* @link https://github.com/timw4mail/HummingBirdAnimeClient
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*/
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namespace Aviat\EasyMin;
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use function Amp\wait;
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use Amp\Artax\{Client, FormBody, Request};
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use Aviat\Ion\Json;
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// Include Amp and Artax
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require_once('../vendor/autoload.php');
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//Creative rewriting of /g/groupname to ?g=groupname
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$pi = $_SERVER['PATH_INFO'];
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$pia = explode('/', $pi);
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$piaLen = count($pia);
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$i = 1;
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while($i < $piaLen)
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{
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$j = $i+1;
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$j = (isset($pia[$j])) ? $j : $i;
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$_GET[$pia[$i]] = $pia[$j];
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$i = $j + 1;
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};
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class FileNotChangedException extends \Exception {}
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/**
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* Simple Javascript minfier, using google closure compiler
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*/
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class JSMin {
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protected $jsRoot;
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protected $jsGroup;
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protected $configFile;
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protected $cacheFile;
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protected $lastModified;
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protected $requestedTime;
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protected $cacheModified;
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public function __construct(array $config, string $configFile)
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{
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$group = $_GET['g'];
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$groups = $config['groups'];
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$this->jsRoot = $config['js_root'];
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$this->jsGroup = $groups[$group];
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$this->configFile = $configFile;
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$this->cacheFile = "{$this->jsRoot}cache/{$group}";
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$this->lastModified = $this->getLastModified();
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$this->cacheModified = (is_file($this->cacheFile))
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? filemtime($this->cacheFile)
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: 0;
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// Output some JS!
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$this->send();
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}
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protected function send()
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{
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// Override caching if debug key is set
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if($this->isDebugCall())
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{
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return $this->output($this->getFiles());
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}
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// If the browser's cached version is up to date,
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// don't resend the file
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if($this->lastModified == $this->getIfModified() && $this->isNotDebug())
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{
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throw new FileNotChangedException();
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}
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if($this->cacheModified < $this->lastModified)
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{
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$js = $this->minify($this->getFiles());
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//Make sure cache file gets created/updated
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if (file_put_contents($this->cacheFile, $js) === FALSE)
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{
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echo 'Cache file was not created. Make sure you have the correct folder permissions.';
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return;
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}
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return $this->output($js);
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}
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else
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{
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return $this->output(file_get_contents($this->cacheFile));
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}
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}
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/**
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* Makes a call to google closure compiler service
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*
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* @param array $options - Form parameters
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* @return object
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*/
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protected function closureCall(array $options)
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{
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$formFields = http_build_query($options);
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$request = (new Request)
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->setMethod('POST')
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->setUri('http://closure-compiler.appspot.com/compile')
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->setAllHeaders([
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'Accept' => 'application/json',
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'Accept-Encoding' => 'gzip',
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'Content-type' => 'application/x-www-form-urlencoded'
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])
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->setBody($formFields);
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$response = wait((new Client)->request($request, [
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Client::OP_AUTO_ENCODING => false
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]));
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return $response;
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}
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/**
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* Do a call to the closure compiler to check for compilation errors
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*
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* @param array $options
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* @return void
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*/
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protected function checkMinifyErrors($options)
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{
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$errorRes = $this->closureCall($options);
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$errorJson = $errorRes->getBody();
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$errorObj = Json::decode($errorJson) ?: (object)[];
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// Show error if exists
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if ( ! empty($errorObj->errors) || ! empty($errorObj->serverErrors))
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{
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$errorJson = Json::encode($errorObj, JSON_PRETTY_PRINT);
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header('Content-type: application/javascript');
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echo "console.error(${errorJson});";
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die();
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}
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}
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/**
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* Get Files
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*
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* Concatenates the javascript files for the current
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* group as a string
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*
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* @return string
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*/
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protected function getFiles()
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{
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$js = '';
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foreach($this->jsGroup as $file)
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{
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$newFile = realpath("{$this->jsRoot}{$file}");
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$js .= file_get_contents($newFile) . "\n\n";
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}
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return $js;
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}
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/**
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* Get the most recent modified date
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*
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* @return int
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*/
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protected function getLastModified()
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{
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$modified = [];
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foreach($this->jsGroup as $file)
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{
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$newFile = realpath("{$this->jsRoot}{$file}");
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$modified[] = filemtime($newFile);
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}
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//Add this page too, as well as the groups file
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$modified[] = filemtime(__FILE__);
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$modified[] = filemtime($this->configFile);
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rsort($modified);
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$lastModified = $modified[0];
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return $lastModified;
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}
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/**
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* Minifies javascript using google's closure compiler
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*
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* @param string $js
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* @return string
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*/
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protected function minify($js)
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{
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$options = [
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'output_info' => 'errors',
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'output_format' => 'json',
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'compilation_level' => 'SIMPLE_OPTIMIZATIONS',
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//'compilation_level' => 'ADVANCED_OPTIMIZATIONS',
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'js_code' => $js,
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'language' => 'ECMASCRIPT6_STRICT',
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'language_out' => 'ECMASCRIPT5_STRICT'
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];
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// Check for errors
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$this->checkMinifyErrors($options);
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// Now actually retrieve the compiled code
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$options['output_info'] = 'compiled_code';
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$res = $this->closureCall($options);
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$json = $res->getBody();
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$obj = Json::decode($json);
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//return $obj;
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return $obj['compiledCode'];
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}
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/**
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* Output the minified javascript
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*
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* @param string $js
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* @return void
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*/
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protected function output($js)
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{
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$this->sendFinalOutput($js, 'application/javascript', $this->lastModified);
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}
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/**
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* Get value of the if-modified-since header
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*
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* @return int - timestamp to compare for cache control
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*/
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protected function getIfModified()
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{
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return (array_key_exists('HTTP_IF_MODIFIED_SINCE', $_SERVER))
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? strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE'])
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: time();
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}
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/**
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* Get value of etag to compare to hash of output
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*
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* @return string - the etag to compare
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*/
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protected function getIfNoneMatch()
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{
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return (array_key_exists('HTTP_IF_NONE_MATCH', $_SERVER))
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? $_SERVER['HTTP_IF_NONE_MATCH']
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: '';
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}
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/**
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* Determine whether or not to send debug version
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*
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* @return boolean
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*/
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protected function isNotDebug()
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{
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return ! $this->isDebugCall();
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}
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/**
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* Determine whether or not to send debug version
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*
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* @return boolean
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*/
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protected function isDebugCall()
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{
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return array_key_exists('debug', $_GET);
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}
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/**
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* Send actual output to browser
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*
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* @param string $content - the body of the response
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* @param string $mimeType - the content type
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* @param int $lastModified - the last modified date
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* @return void
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*/
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protected function sendFinalOutput($content, $mimeType, $lastModified)
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{
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//This GZIPs the CSS for transmission to the user
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//making file size smaller and transfer rate quicker
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ob_start("ob_gzhandler");
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$expires = $lastModified + 691200;
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$lastModifiedDate = gmdate('D, d M Y H:i:s', $lastModified);
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$expiresDate = gmdate('D, d M Y H:i:s', $expires);
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header("Content-Type: {$mimeType}; charset=utf8");
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header("Cache-control: public, max-age=691200, must-revalidate");
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header("Last-Modified: {$lastModifiedDate} GMT");
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header("Expires: {$expiresDate} GMT");
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echo $content;
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ob_end_flush();
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}
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/**
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* Send a 304 Not Modified header
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*
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* @return void
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*/
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public static function send304()
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{
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header("status: 304 Not Modified", true, 304);
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}
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}
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// --------------------------------------------------------------------------
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// ! Start Minifying
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// --------------------------------------------------------------------------
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$configFile = realpath(__DIR__ . '/../app/appConf/minify_config.php');
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$config = require_once($configFile);
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$groups = $config['groups'];
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$cacheDir = "{$config['js_root']}cache";
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if ( ! is_dir($cacheDir))
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{
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mkdir($cacheDir);
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}
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if ( ! array_key_exists($_GET['g'], $groups))
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{
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throw new InvalidArgumentException('You must specify a js group that exists');
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}
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try
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{
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new JSMin($config, $configFile);
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}
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catch (FileNotChangedException $e)
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{
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JSMin::send304();
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}
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//end of js.php
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