framework/web/AssetManager.php
<?php
/**
* @link https://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license https://www.yiiframework.com/license/
*/
namespace yii\web;
use Yii;
use yii\base\Component;
use yii\base\InvalidArgumentException;
use yii\base\InvalidConfigException;
use yii\helpers\FileHelper;
use yii\helpers\Url;
/**
* AssetManager manages asset bundle configuration and loading.
*
* AssetManager is configured as an application component in [[\yii\web\Application]] by default.
* You can access that instance via `Yii::$app->assetManager`.
*
* You can modify its configuration by adding an array to your application config under `components`
* as shown in the following example:
*
* ```php
* 'assetManager' => [
* 'bundles' => [
* // you can override AssetBundle configs here
* ],
* ]
* ```
*
* For more details and usage information on AssetManager, see the [guide article on assets](guide:structure-assets).
*
* @property AssetConverterInterface $converter The asset converter. Note that the type of this property
* differs in getter and setter. See [[getConverter()]] and [[setConverter()]] for details.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class AssetManager extends Component
{
/**
* @var array|false list of asset bundle configurations. This property is provided to customize asset bundles.
* When a bundle is being loaded by [[getBundle()]], if it has a corresponding configuration specified here,
* the configuration will be applied to the bundle.
*
* The array keys are the asset bundle names, which typically are asset bundle class names without leading backslash.
* The array values are the corresponding configurations. If a value is false, it means the corresponding asset
* bundle is disabled and [[getBundle()]] should return null.
*
* If this property is false, it means the whole asset bundle feature is disabled and [[getBundle()]]
* will always return null.
*
* The following example shows how to disable the bootstrap css file used by Bootstrap widgets
* (because you want to use your own styles):
*
* ```php
* [
* 'yii\bootstrap\BootstrapAsset' => [
* 'css' => [],
* ],
* ]
* ```
*/
public $bundles = [];
/**
* @var string the root directory storing the published asset files.
*/
public $basePath = '@webroot/assets';
/**
* @var string the base URL through which the published asset files can be accessed.
*/
public $baseUrl = '@web/assets';
/**
* @var string[] mapping from source asset files (keys) to target asset files (values).
*
* This property is provided to support fixing incorrect asset file paths in some asset bundles.
* When an asset bundle is registered with a view, each relative asset file in its [[AssetBundle::css|css]]
* and [[AssetBundle::js|js]] arrays will be examined against this map. If any of the keys is found
* to be the last part of an asset file (which is prefixed with [[AssetBundle::sourcePath]] if available),
* the corresponding value will replace the asset and be registered with the view.
* For example, an asset file `my/path/to/jquery.js` matches a key `jquery.js`.
*
* Note that the target asset files should be absolute URLs, domain relative URLs (starting from '/') or paths
* relative to [[baseUrl]] and [[basePath]].
*
* In the following example, any assets ending with `jquery.min.js` will be replaced with `jquery/dist/jquery.js`
* which is relative to [[baseUrl]] and [[basePath]].
*
* ```php
* [
* 'jquery.min.js' => 'jquery/dist/jquery.js',
* ]
* ```
*
* You may also use aliases while specifying map value, for example:
*
* ```php
* [
* 'jquery.min.js' => '@web/js/jquery/jquery.js',
* ]
* ```
*/
public $assetMap = [];
/**
* @var bool whether to use symbolic link to publish asset files. Defaults to false, meaning
* asset files are copied to [[basePath]]. Using symbolic links has the benefit that the published
* assets will always be consistent with the source assets and there is no copy operation required.
* This is especially useful during development.
*
* However, there are special requirements for hosting environments in order to use symbolic links.
* In particular, symbolic links are supported only on Linux/Unix, and Windows Vista/2008 or greater.
*
* Moreover, some Web servers need to be properly configured so that the linked assets are accessible
* to Web users. For example, for Apache Web server, the following configuration directive should be added
* for the Web folder:
*
* ```apache
* Options FollowSymLinks
* ```
*/
public $linkAssets = false;
/**
* @var int|null the permission to be set for newly published asset files.
* This value will be used by PHP chmod() function. No umask will be applied.
* If not set, the permission will be determined by the current environment.
*/
public $fileMode;
/**
* @var int the permission to be set for newly generated asset directories.
* This value will be used by PHP chmod() function. No umask will be applied.
* Defaults to 0775, meaning the directory is read-writable by owner and group,
* but read-only for other users.
*/
public $dirMode = 0775;
/**
* @var callable|null a PHP callback that is called before copying each sub-directory or file.
* This option is used only when publishing a directory. If the callback returns false, the copy
* operation for the sub-directory or file will be cancelled.
*
* The signature of the callback should be: `function ($from, $to)`, where `$from` is the sub-directory or
* file to be copied from, while `$to` is the copy target.
*
* This is passed as a parameter `beforeCopy` to [[\yii\helpers\FileHelper::copyDirectory()]].
*/
public $beforeCopy;
/**
* @var callable|null a PHP callback that is called after a sub-directory or file is successfully copied.
* This option is used only when publishing a directory. The signature of the callback is the same as
* for [[beforeCopy]].
* This is passed as a parameter `afterCopy` to [[\yii\helpers\FileHelper::copyDirectory()]].
*/
public $afterCopy;
/**
* @var bool whether the directory being published should be copied even if
* it is found in the target directory. This option is used only when publishing a directory.
* You may want to set this to be `true` during the development stage to make sure the published
* directory is always up-to-date. Do not set this to true on production servers as it will
* significantly degrade the performance.
*/
public $forceCopy = false;
/**
* @var bool whether to append a timestamp to the URL of every published asset. When this is true,
* the URL of a published asset may look like `/path/to/asset?v=timestamp`, where `timestamp` is the
* last modification time of the published asset file.
* You normally would want to set this property to true when you have enabled HTTP caching for assets,
* because it allows you to bust caching when the assets are updated.
* @since 2.0.3
*/
public $appendTimestamp = false;
/**
* @var callable|null a callback that will be called to produce hash for asset directory generation.
* The signature of the callback should be as follows:
*
* ```
* function ($path)
* ```
*
* where `$path` is the asset path. Note that the `$path` can be either directory where the asset
* files reside or a single file. For a CSS file that uses relative path in `url()`, the hash
* implementation should use the directory path of the file instead of the file path to include
* the relative asset files in the copying.
*
* If this is not set, the asset manager will use the default CRC32 and filemtime in the `hash`
* method.
*
* Example of an implementation using MD4 hash:
*
* ```php
* function ($path) {
* return hash('md4', $path);
* }
* ```
*
* @since 2.0.6
*/
public $hashCallback;
/**
* @var array
*/
private $_dummyBundles = [];
/**
* Initializes the component.
* @throws InvalidConfigException if [[basePath]] does not exist.
*/
public function init()
{
parent::init();
$this->basePath = Yii::getAlias($this->basePath);
$this->basePath = realpath($this->basePath);
$this->baseUrl = rtrim(Yii::getAlias($this->baseUrl), '/');
}
/**
* @var bool|null
*/
private $_isBasePathPermissionChecked;
/**
* Check whether the basePath exists and is writeable.
*
* @since 2.0.40
*/
public function checkBasePathPermission()
{
// if the check is been done already, skip further checks
if ($this->_isBasePathPermissionChecked) {
return;
}
if (!is_dir($this->basePath)) {
throw new InvalidConfigException("The directory does not exist: {$this->basePath}");
}
if (!is_writable($this->basePath)) {
throw new InvalidConfigException("The directory is not writable by the Web process: {$this->basePath}");
}
$this->_isBasePathPermissionChecked = true;
}
/**
* Returns the named asset bundle.
*
* This method will first look for the bundle in [[bundles]]. If not found,
* it will treat `$name` as the class of the asset bundle and create a new instance of it.
*
* @param string $name the class name of the asset bundle (without the leading backslash)
* @param bool $publish whether to publish the asset files in the asset bundle before it is returned.
* If you set this false, you must manually call `AssetBundle::publish()` to publish the asset files.
* @return AssetBundle the asset bundle instance
* @throws InvalidConfigException if $name does not refer to a valid asset bundle
*/
public function getBundle($name, $publish = true)
{
if ($this->bundles === false) {
return $this->loadDummyBundle($name);
} elseif (!isset($this->bundles[$name])) {
return $this->bundles[$name] = $this->loadBundle($name, [], $publish);
} elseif ($this->bundles[$name] instanceof AssetBundle) {
return $this->bundles[$name];
} elseif (is_array($this->bundles[$name])) {
return $this->bundles[$name] = $this->loadBundle($name, $this->bundles[$name], $publish);
} elseif ($this->bundles[$name] === false) {
return $this->loadDummyBundle($name);
}
throw new InvalidConfigException("Invalid asset bundle configuration: $name");
}
/**
* Loads asset bundle class by name.
*
* @param string $name bundle name
* @param array $config bundle object configuration
* @param bool $publish if bundle should be published
* @return AssetBundle
* @throws InvalidConfigException if configuration isn't valid
*/
protected function loadBundle($name, $config = [], $publish = true)
{
if (!isset($config['class'])) {
$config['class'] = $name;
}
/* @var $bundle AssetBundle */
$bundle = Yii::createObject($config);
if ($publish) {
$bundle->publish($this);
}
return $bundle;
}
/**
* Loads dummy bundle by name.
*
* @param string $name
* @return AssetBundle
*/
protected function loadDummyBundle($name)
{
if (!isset($this->_dummyBundles[$name])) {
$bundle = Yii::createObject(['class' => $name]);
$bundle->sourcePath = null;
$bundle->js = [];
$bundle->css = [];
$this->_dummyBundles[$name] = $bundle;
}
return $this->_dummyBundles[$name];
}
/**
* Returns the actual URL for the specified asset.
* The actual URL is obtained by prepending either [[AssetBundle::$baseUrl]] or [[AssetManager::$baseUrl]] to the given asset path.
* @param AssetBundle $bundle the asset bundle which the asset file belongs to
* @param string $asset the asset path. This should be one of the assets listed in [[AssetBundle::$js]] or [[AssetBundle::$css]].
* @param bool|null $appendTimestamp Whether to append timestamp to the URL.
* @return string the actual URL for the specified asset.
*/
public function getAssetUrl($bundle, $asset, $appendTimestamp = null)
{
$assetUrl = $this->getActualAssetUrl($bundle, $asset);
$assetPath = $this->getAssetPath($bundle, $asset);
$withTimestamp = $this->appendTimestamp;
if ($appendTimestamp !== null) {
$withTimestamp = $appendTimestamp;
}
if ($withTimestamp && $assetPath && ($timestamp = @filemtime($assetPath)) > 0) {
return "$assetUrl?v=$timestamp";
}
return $assetUrl;
}
/**
* Returns the actual file path for the specified asset.
* @param AssetBundle $bundle the asset bundle which the asset file belongs to
* @param string $asset the asset path. This should be one of the assets listed in [[AssetBundle::$js]] or [[AssetBundle::$css]].
* @return string|false the actual file path, or `false` if the asset is specified as an absolute URL
*/
public function getAssetPath($bundle, $asset)
{
if (($actualAsset = $this->resolveAsset($bundle, $asset)) !== false) {
return Url::isRelative($actualAsset) ? $this->basePath . '/' . $actualAsset : false;
}
return Url::isRelative($asset) ? $bundle->basePath . '/' . $asset : false;
}
/**
* @param AssetBundle $bundle
* @param string $asset
* @return string|false
*/
protected function resolveAsset($bundle, $asset)
{
if (isset($this->assetMap[$asset])) {
return $this->assetMap[$asset];
}
if ($bundle->sourcePath !== null && Url::isRelative($asset)) {
$asset = $bundle->sourcePath . '/' . $asset;
}
$n = mb_strlen($asset, Yii::$app->charset);
foreach ($this->assetMap as $from => $to) {
$n2 = mb_strlen($from, Yii::$app->charset);
if ($n2 <= $n && substr_compare($asset, $from, $n - $n2, $n2) === 0) {
return $to;
}
}
return false;
}
/**
* @var AssetConverterInterface
*/
private $_converter;
/**
* Returns the asset converter.
* @return AssetConverterInterface the asset converter.
*/
public function getConverter()
{
if ($this->_converter === null) {
$this->_converter = Yii::createObject(AssetConverter::className());
} elseif (is_array($this->_converter) || is_string($this->_converter)) {
if (is_array($this->_converter) && !isset($this->_converter['class'])) {
$this->_converter['class'] = AssetConverter::className();
}
$this->_converter = Yii::createObject($this->_converter);
}
return $this->_converter;
}
/**
* Sets the asset converter.
* @param array|AssetConverterInterface $value the asset converter. This can be either
* an object implementing the [[AssetConverterInterface]], or a configuration
* array that can be used to create the asset converter object.
*/
public function setConverter($value)
{
$this->_converter = $value;
}
/**
* @var array published assets
*/
private $_published = [];
/**
* Publishes a file or a directory.
*
* This method will copy the specified file or directory to [[basePath]] so that
* it can be accessed via the Web server.
*
* If the asset is a file, its file modification time will be checked to avoid
* unnecessary file copying.
*
* If the asset is a directory, all files and subdirectories under it will be published recursively.
* Note, in case $forceCopy is false the method only checks the existence of the target
* directory to avoid repetitive copying (which is very expensive).
*
* By default, when publishing a directory, subdirectories and files whose name starts with a dot "."
* will NOT be published. If you want to change this behavior, you may specify the "beforeCopy" option
* as explained in the `$options` parameter.
*
* Note: On rare scenario, a race condition can develop that will lead to a
* one-time-manifestation of a non-critical problem in the creation of the directory
* that holds the published assets. This problem can be avoided altogether by 'requesting'
* in advance all the resources that are supposed to trigger a 'publish()' call, and doing
* that in the application deployment phase, before system goes live. See more in the following
* discussion: https://code.google.com/archive/p/yii/issues/2579
*
* @param string $path the asset (file or directory) to be published
* @param array $options the options to be applied when publishing a directory.
* The following options are supported:
*
* - only: array, list of patterns that the file paths should match if they want to be copied.
* - except: array, list of patterns that the files or directories should match if they want to be excluded from being copied.
* - caseSensitive: boolean, whether patterns specified at "only" or "except" should be case sensitive. Defaults to true.
* - beforeCopy: callback, a PHP callback that is called before copying each sub-directory or file.
* This overrides [[beforeCopy]] if set.
* - afterCopy: callback, a PHP callback that is called after a sub-directory or file is successfully copied.
* This overrides [[afterCopy]] if set.
* - forceCopy: boolean, whether the directory being published should be copied even if
* it is found in the target directory. This option is used only when publishing a directory.
* This overrides [[forceCopy]] if set.
*
* @return array the path (directory or file path) and the URL that the asset is published as.
* @throws InvalidArgumentException if the asset to be published does not exist.
* @throws InvalidConfigException if the target directory [[basePath]] is not writeable.
*/
public function publish($path, $options = [])
{
$path = Yii::getAlias($path);
if (isset($this->_published[$path])) {
return $this->_published[$path];
}
if (!is_string($path) || ($src = realpath($path)) === false) {
throw new InvalidArgumentException("The file or directory to be published does not exist: $path");
}
if (!is_readable($path)) {
throw new InvalidArgumentException("The file or directory to be published is not readable: $path");
}
if (is_file($src)) {
return $this->_published[$path] = $this->publishFile($src);
}
return $this->_published[$path] = $this->publishDirectory($src, $options);
}
/**
* Publishes a file.
* @param string $src the asset file to be published
* @return string[] the path and the URL that the asset is published as.
* @throws InvalidArgumentException if the asset to be published does not exist.
*/
protected function publishFile($src)
{
$this->checkBasePathPermission();
$dir = $this->hash($src);
$fileName = basename($src);
$dstDir = $this->basePath . DIRECTORY_SEPARATOR . $dir;
$dstFile = $dstDir . DIRECTORY_SEPARATOR . $fileName;
if (!is_dir($dstDir)) {
FileHelper::createDirectory($dstDir, $this->dirMode, true);
}
if ($this->linkAssets) {
if (!is_file($dstFile)) {
try { // fix #6226 symlinking multi threaded
symlink($src, $dstFile);
} catch (\Exception $e) {
if (!is_file($dstFile)) {
throw $e;
}
}
}
} elseif (@filemtime($dstFile) < @filemtime($src)) {
copy($src, $dstFile);
if ($this->fileMode !== null) {
@chmod($dstFile, $this->fileMode);
}
}
if ($this->appendTimestamp && ($timestamp = @filemtime($dstFile)) > 0) {
$fileName = $fileName . "?v=$timestamp";
}
return [$dstFile, $this->baseUrl . "/$dir/$fileName"];
}
/**
* Publishes a directory.
* @param string $src the asset directory to be published
* @param array $options the options to be applied when publishing a directory.
* The following options are supported:
*
* - only: array, list of patterns that the file paths should match if they want to be copied.
* - except: array, list of patterns that the files or directories should match if they want to be excluded from being copied.
* - caseSensitive: boolean, whether patterns specified at "only" or "except" should be case sensitive. Defaults to true.
* - beforeCopy: callback, a PHP callback that is called before copying each sub-directory or file.
* This overrides [[beforeCopy]] if set.
* - afterCopy: callback, a PHP callback that is called after a sub-directory or file is successfully copied.
* This overrides [[afterCopy]] if set.
* - forceCopy: boolean, whether the directory being published should be copied even if
* it is found in the target directory. This option is used only when publishing a directory.
* This overrides [[forceCopy]] if set.
*
* @return string[] the path directory and the URL that the asset is published as.
* @throws InvalidArgumentException if the asset to be published does not exist.
*/
protected function publishDirectory($src, $options)
{
$this->checkBasePathPermission();
$dir = $this->hash($src);
$dstDir = $this->basePath . DIRECTORY_SEPARATOR . $dir;
if ($this->linkAssets) {
if (!is_dir($dstDir)) {
FileHelper::createDirectory(dirname($dstDir), $this->dirMode, true);
try { // fix #6226 symlinking multi threaded
symlink($src, $dstDir);
} catch (\Exception $e) {
if (!is_dir($dstDir)) {
throw $e;
}
}
}
} elseif (!empty($options['forceCopy']) || ($this->forceCopy && !isset($options['forceCopy'])) || !is_dir($dstDir)) {
$opts = array_merge(
$options,
[
'dirMode' => $this->dirMode,
'fileMode' => $this->fileMode,
'copyEmptyDirectories' => false,
]
);
if (!isset($opts['beforeCopy'])) {
if ($this->beforeCopy !== null) {
$opts['beforeCopy'] = $this->beforeCopy;
} else {
$opts['beforeCopy'] = function ($from, $to) {
return strncmp(basename($from), '.', 1) !== 0;
};
}
}
if (!isset($opts['afterCopy']) && $this->afterCopy !== null) {
$opts['afterCopy'] = $this->afterCopy;
}
FileHelper::copyDirectory($src, $dstDir, $opts);
}
return [$dstDir, $this->baseUrl . '/' . $dir];
}
/**
* Returns the published path of a file path.
* This method does not perform any publishing. It merely tells you
* if the file or directory is published, where it will go.
* @param string $path directory or file path being published
* @return string|false string the published file path. False if the file or directory does not exist
*/
public function getPublishedPath($path)
{
$path = Yii::getAlias($path);
if (isset($this->_published[$path])) {
return $this->_published[$path][0];
}
if (is_string($path) && ($path = realpath($path)) !== false) {
return $this->basePath . DIRECTORY_SEPARATOR . $this->hash($path) . (is_file($path) ? DIRECTORY_SEPARATOR . basename($path) : '');
}
return false;
}
/**
* Returns the URL of a published file path.
* This method does not perform any publishing. It merely tells you
* if the file path is published, what the URL will be to access it.
* @param string $path directory or file path being published
* @return string|false string the published URL for the file or directory. False if the file or directory does not exist.
*/
public function getPublishedUrl($path)
{
$path = Yii::getAlias($path);
if (isset($this->_published[$path])) {
return $this->_published[$path][1];
}
if (is_string($path) && ($path = realpath($path)) !== false) {
return $this->baseUrl . '/' . $this->hash($path) . (is_file($path) ? '/' . basename($path) : '');
}
return false;
}
/**
* Generate a CRC32 hash for the directory path. Collisions are higher
* than MD5 but generates a much smaller hash string.
* @param string $path string to be hashed.
* @return string hashed string.
*/
protected function hash($path)
{
if (is_callable($this->hashCallback)) {
return call_user_func($this->hashCallback, $path);
}
$path = (is_file($path) ? dirname($path) : $path) . filemtime($path);
return sprintf('%x', crc32($path . Yii::getVersion() . '|' . $this->linkAssets));
}
/**
* Returns the actual URL for the specified asset. Without parameters.
* The actual URL is obtained by prepending either [[AssetBundle::$baseUrl]] or [[AssetManager::$baseUrl]] to the given asset path.
* @param AssetBundle $bundle the asset bundle which the asset file belongs to
* @param string $asset the asset path. This should be one of the assets listed in [[AssetBundle::$js]] or [[AssetBundle::$css]].
* @return string the actual URL for the specified asset.
* @since 2.0.39
*/
public function getActualAssetUrl($bundle, $asset)
{
if (($actualAsset = $this->resolveAsset($bundle, $asset)) !== false) {
if (strncmp($actualAsset, '@web/', 5) === 0) {
$asset = substr($actualAsset, 5);
$baseUrl = Yii::getAlias('@web');
} else {
$asset = Yii::getAlias($actualAsset);
$baseUrl = $this->baseUrl;
}
} else {
$baseUrl = $bundle->baseUrl;
}
if (!Url::isRelative($asset) || strncmp($asset, '/', 1) === 0) {
return $asset;
}
return "$baseUrl/$asset";
}
}