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Diffstat (limited to 'framework/Web/TAssetManager.php')
| -rw-r--r-- | framework/Web/TAssetManager.php | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/framework/Web/TAssetManager.php b/framework/Web/TAssetManager.php new file mode 100644 index 00000000..5c3fbc60 --- /dev/null +++ b/framework/Web/TAssetManager.php @@ -0,0 +1,240 @@ +<?php
+/**
+ * TAssetManager class
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link http://www.pradosoft.com/
+ * @copyright Copyright © 2005 PradoSoft
+ * @license http://www.pradosoft.com/license/
+ * @version $Revision: $ $Date: $
+ * @package System.Web
+ */
+
+/**
+ * TAssetManager class
+ *
+ * TAssetManager provides a scheme to allow web clients visiting
+ * private files that are normally web-inaccessible.
+ *
+ * TAssetManager will copy the file to be published into a web-accessible
+ * directory. The default base directory for storing the file is "assets", which
+ * should be under the application directory. This can be changed by setting
+ * the {@link setBasePath BasePath} property together with the
+ * {@link setBaseUrl BaseUrl} property that refers to the URL for accessing the base path.
+ *
+ * By default, TAssetManager will not publish a file or directory if it already
+ * exists in the publishing directory and has an older modification time.
+ * If the application mode is set as 'Performance', the modification time check
+ * will be skipped. You can explicitly require a modification time check
+ * with the function {@link publishFilePath}. This is usually
+ * very useful during development.
+ *
+ * TAssetManager may be configured in application configuration file as follows,
+ * <code>
+ * <module id="asset" BasePath="Application.assets" BaseUrl="/assets" />
+ * </code>
+ * where {@link getBasePath BasePath} and {@link getBaseUrl BaseUrl} are
+ * configurable properties of TAssetManager. Make sure that BasePath is a namespace
+ * pointing to a valid directory writable by the Web server process.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @version $Revision: $ $Date: $
+ * @package System.Web
+ * @since 3.0
+ */
+class TAssetManager extends TModule
+{
+ /**
+ * Default web accessible base path for storing private files
+ */
+ const DEFAULT_BASEPATH='assets';
+ /**
+ * @var string base web accessible path for storing private files
+ */
+ private $_basePath=null;
+ /**
+ * @var string base URL for accessing the publishing directory.
+ */
+ private $_baseUrl=null;
+ /**
+ * @var boolean whether to use timestamp checking to ensure files are published with up-to-date versions.
+ */
+ private $_checkTimestamp=false;
+ /**
+ * @var TApplication application instance
+ */
+ private $_application;
+ /**
+ * @var array published assets
+ */
+ private $_published=array();
+ /**
+ * @var boolean whether the module is initialized
+ */
+ private $_initialized=false;
+
+ /**
+ * Initializes the module.
+ * This method is required by IModule and is invoked by application.
+ * @param TXmlElement module configuration
+ */
+ public function init($config)
+ {
+ $application=$this->getApplication();
+ if($this->_basePath===null)
+ $this->_basePath=dirname($application->getRequest()->getPhysicalApplicationPath()).'/'.self::DEFAULT_BASEPATH;
+ if(!is_writable($this->_basePath) || !is_dir($this->_basePath))
+ throw new TConfigurationException('assetmanager_basepath_invalid',$this->_basePath);
+ if($this->_baseUrl===null)
+ $this->_baseUrl=rtrim(dirname($application->getRequest()->getApplicationPath()),'/\\').'/'.self::DEFAULT_BASEPATH;
+ $application->setAssetManager($this);
+ $this->_initialized=true;
+ }
+
+ /**
+ * @return string the root directory storing published asset files
+ */
+ public function getBasePath()
+ {
+ return $this->_basePath;
+ }
+
+ /**
+ * Sets the root directory storing published asset files.
+ * The directory must be in namespace format.
+ * @param string the root directory storing published asset files
+ * @throws TInvalidOperationException if the module is initialized already
+ */
+ public function setBasePath($value)
+ {
+ if($this->_initialized)
+ throw new TInvalidOperationException('assetmanager_basepath_unchangeable');
+ else
+ {
+ $this->_basePath=Prado::getPathOfAlias($value);
+ if($this->_basePath===null || !is_dir($this->_basePath) || !is_writable($this->_basePath))
+ throw new TInvalidDataValueException('assetmanage_basepath_invalid',$value);
+ }
+ }
+
+ /**
+ * @return string the base url that the published asset files can be accessed
+ */
+ public function getBaseUrl()
+ {
+ return $this->_baseUrl;
+ }
+
+ /**
+ * @param string the base url that the published asset files can be accessed
+ * @throws TInvalidOperationException if the module is initialized already
+ */
+ public function setBaseUrl($value)
+ {
+ if($this->_initialized)
+ throw new TInvalidOperationException('assetmanager_baseurl_unchangeable');
+ else
+ $this->_baseUrl=rtrim($value,'/');
+ }
+
+ public function getPublishedUrl($path)
+ {
+ if(($fullpath=realpath($path))!==false)
+ {
+ $dir=$this->hash(dirname($fullpath));
+ $file=$this->_basePath.'/'.$dir.'/'.basename($fullpath);
+ if(is_file($file) || is_dir($file))
+ return $this->_baseUrl.'/'.$dir.'/'.basename($fullpath);
+ }
+ return null;
+ }
+
+ public function isPublished($path)
+ {
+ return $this->getPublishedUrl($path) !== null;
+ }
+
+ /**
+ * Publishes a file or a directory (recursively).
+ * This method will copy the content in a directory (recursively) to
+ * a web accessible directory and returns the URL for the directory.
+ * @param string the path to be published
+ * @param boolean whether to use file modify time to ensure every published file is latest
+ * @return string an absolute URL to the published directory
+ */
+ public function publishFilePath($path,$checkTimestamp=false)
+ {
+ if(isset($this->_published[$path]))
+ return $this->_published[$path];
+ else if(($fullpath=realpath($path))===false)
+ return '';
+ else if(is_file($fullpath))
+ {
+ $dir=$this->hash(dirname($fullpath));
+ $file=$this->_basePath.'/'.$dir.'/'.basename($fullpath);
+ if(!is_file($file) || $checkTimestamp || $this->getApplication()->getMode()!==TApplication::STATE_PERFORMANCE)
+ {
+ if(!is_dir($this->_basePath.'/'.$dir))
+ @mkdir($this->_basePath.'/'.$dir);
+ if(!is_file($file) || @filemtime($file)<@filemtime($fullpath))
+ {
+ Prado::trace("Publishing file $fullpath",'System.Web.UI.TAssetManager');
+ @copy($fullpath,$file);
+ }
+ }
+ $this->_published[$path]=$this->_baseUrl.'/'.$dir.'/'.basename($fullpath);
+ return $this->_published[$path];
+ }
+ else
+ {
+ $dir=$this->hash($fullpath);
+ if(!is_dir($this->_basePath.'/'.$dir) || $checkTimestamp || $this->getApplication()->getMode()!==TApplication::STATE_PERFORMANCE)
+ {
+ Prado::trace("Publishing directory $fullpath",'System.Web.UI.TAssetManager');
+ $this->copyDirectory($fullpath,$this->_basePath.'/'.$dir);
+ }
+ $this->_published[$path]=$this->_baseUrl.'/'.$dir;
+ return $this->_published[$path];
+ }
+ }
+
+ /**
+ * Generate a CRC32 hash for the directory path. Collisions are higher
+ * than MD5 but generates a much smaller hash string.
+ * @param string string to be hashed.
+ * @return string hashed string.
+ */
+ protected function hash($dir)
+ {
+ return sprintf('%x',crc32($dir));
+ }
+
+ /**
+ * Copies a directory recursively as another.
+ * If the destination directory does not exist, it will be created.
+ * File modification time is used to ensure the copied files are latest.
+ * @param string the source directory
+ * @param string the destination directory
+ */
+ protected function copyDirectory($src,$dst)
+ {
+ if(!is_dir($dst))
+ @mkdir($dst);
+ $folder=@opendir($src);
+ while($file=@readdir($folder))
+ {
+ if($file==='.' || $file==='..')
+ continue;
+ else if(is_file($src.'/'.$file))
+ {
+ if(@filemtime($dst.'/'.$file)<@filemtime($src.'/'.$file))
+ @copy($src.'/'.$file,$dst.'/'.$file);
+ }
+ else
+ $this->copyDirectory($src.'/'.$file,$dst.'/'.$file);
+ }
+ closedir($folder);
+ }
+}
+
+?>
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