yii2资源管理原理分析_yii2 instanceof-优快云博客

本文链接：https://blog.youkuaiyun.com/csdn_azuo/article/details/79389817

注意事项：

$this->beginPage(),endBody(),$this->head()等一定要加上

views\layouts\main.php

AppAsset::register($this);

追溯register()

yii\]web\assetBundle.php

 /**
     * Registers this asset bundle with a view.
     * @param View $view the view to be registered with
     * @return static the registered asset bundle instance
     */
    public static function register($view)
    {
        return $view->registerAssetBundle(get_called_class());
    }

追溯registerAssetBundle()

yii\web\view.php

 public function registerAssetBundle($name, $position = null)
    {
        if (!isset($this->assetBundles[$name])) {
            $am = $this->getAssetManager();
            $bundle = $am->getBundle($name);
            $this->assetBundles[$name] = false;
            // register dependencies
            $pos = isset($bundle->jsOptions['position']) ? $bundle->jsOptions['position'] : null;
            foreach ($bundle->depends as $dep) {
                $this->registerAssetBundle($dep, $pos);
            }
            $this->assetBundles[$name] = $bundle;
        } elseif ($this->assetBundles[$name] === false) {
            throw new InvalidConfigException("A circular dependency is detected for bundle '$name'.");
        } else {
            $bundle = $this->assetBundles[$name];
        } $am->getBundle($name);
            $this->assetBundles[$name] = false;
            // register dependencies
            $pos = isset($bundle->jsOptions['position']) ? $bundle->jsOptions['position'] : null;
            foreach ($bundle->depends as $dep) {
                $this->registerAssetBundle($dep, $pos);
            }
            $this->assetBundles[$name] = $bundle;
        } elseif ($this->assetBundles[$name] === false) {
            throw new InvalidConfigException("A circular dependency is detected for bundle '$name'.");
        } else {
            $bundle = $this->assetBundles[$name];
        }

追溯getBundle()

yii\web\assetManage.php

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: $name");
    }$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");
    }

追溯loadBundle()

yii\web\assetManage.php

  /**
     * 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 $bundle;
    }bundle->publish($this);
        }

        return $bundle;
    }

追溯publish()

yii\]web\assetBundle.php

/**
     * Publishes the asset bundle if its source code is not under Web-accessible directory.
     * It will also try to convert non-CSS or JS files (e.g. LESS, Sass) into the corresponding
     * CSS or JS files using [[AssetManager::converter|asset converter]].
     * @param AssetManager $am the asset manager to perform the asset publishing
     */
    public function publish($am)
    {
        if ($this->sourcePath !== null && !isset($this->basePath, $this->baseUrl)) {
            list($this->basePath, $this->baseUrl) = $am->publish($this->sourcePath, $this->publishOptions);
        }

        if (isset($this->basePath, $this->baseUrl) && ($converter = $am->getConverter()) !== null) {
            foreach ($this->js as $i => $js) {
                if (is_array($js)) {
                    $file = array_shift($js);
                    if (Url::isRelative($file)) {
                        $js = ArrayHelper::merge($this->jsOptions, $js);
                        array_unshift($js, $converter->convert($file, $this->basePath));
                        $this->js[$i] = $js;
                    }
                } elseif (Url::isRelative($js)) {
                    $this->js[$i] = $converter->convert($js, $this->basePath);
                }
            }
            foreach ($this->css as $i => $css) {
                if (is_array($css)) {
                    $file = array_shift($css);
                    if (Url::isRelative($file)) {
                        $css = ArrayHelper::merge($this->cssOptions, $css);
                        array_unshift($css, $converter->convert($file, $this->basePath));
                        $this->css[$i] = $css;
                    }
                } elseif (Url::isRelative($css)) {
                    $this->css[$i] = $converter->convert($css, $this->basePath);
                }
            }
        }
    }$am->publish($this->sourcePath, $this->publishOptions);
        }

        if (isset($this->basePath, $this->baseUrl) && ($converter = $am->getConverter()) !== null) {
            foreach ($this->js as $i => $js) {
                if (is_array($js)) {
                    $file = array_shift($js);
                    if (Url::isRelative($file)) {
                        $js = ArrayHelper::merge($this->jsOptions, $js);
                        array_unshift($js, $converter->convert($file, $this->basePath));
                        $this->js[$i] = $js;
                    }
                } elseif (Url::isRelative($js)) {
                    $this->js[$i] = $converter->convert($js, $this->basePath);
                }
            }
            foreach ($this->css as $i => $css) {
                if (is_array($css)) {
                    $file = array_shift($css);
                    if (Url::isRelative($file)) {
                        $css = ArrayHelper::merge($this->cssOptions, $css);
                        array_unshift($css, $converter->convert($file, $this->basePath));
                        $this->css[$i] = $css;
                    }
                } elseif (Url::isRelative($css)) {
                    $this->css[$i] = $converter->convert($css, $this->basePath);
                }
            }
        }
    }

追溯publish()

yii\]web\assetManger.php

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 InvalidParamException("The file or directory to be published does not exist: $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 $src the asset file to be published
     * @return string[] the path and the URL that the asset is published as.
     * @throws InvalidParamException if the asset to be published does not exist.
     */
    protected function publishFile($src)
    {
        $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);
            }
        }

        return [$dstFile, $this->baseUrl . "/$dir/$fileName"];
    }$this->publishFile($src);
        }

        return $this->_published[$path] = $this->publishDirectory($src, $options);
    }

    /**
     * Publishes a file.
     * @param string $src the asset file to be published
     * @return string[] the path and the URL that the asset is published as.
     * @throws InvalidParamException if the asset to be published does not exist.
     */
    protected function publishFile($src)
    {
        $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);
            }
        }

        return [$dstFile, $this->baseUrl . "/$dir/$fileName"];
    }

这里的basePath，在yii\web\assetManager.php定义的

 public $basePath = '@webroot/assets';
    /**
     * @var string the base URL through which the published asset files can be accessed.
     */
    public $baseUrl = '@web/assets';public $basePath = '@webroot/assets';
    /**
     * @var string the base URL through which the published asset files can be accessed.
     */
    public $baseUrl = '@web/assets';