yii源码分析2,yii源码分析_PHP教程
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2022-03-26 19:42:19
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yii源码分析2,yii源码分析
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上一篇主要分析了Yii::createWebApplication ( $config )->run ();的createWebApplication ( $config )部分,这篇分析后面的。
run()也是不在CWebApplication里面,在CApplication 里。
1 php 2 abstract class CApplication extends CModule { 3 private $_id; 4 private $_basePath; 5 abstract public function processRequest(); 6 public function __construct($config = null) { 7 if (is_string ( $config )) 8 $config = require ($config); 9 Yii::setApplication ( $this );//保存整个app实例 10 if (isset ( $config ['basePath'] )) { 11 $this->setBasePath ( $config ['basePath'] ); 12 unset ( $config ['basePath'] ); 13 } else 14 $this->setBasePath ( 'protected' ); 15 //设置别名,后面就可以用application表示basePath了 16 Yii::setPathOfAlias ( 'application', $this->getBasePath () ); 17 //钩子,模块 预 初始化时执行,子类实现。不过这时,配置还没有写入框架 18 $this->preinit (); 19 $this->registerCoreComponents (); 20 //父类实现 21 $this->configure ( $config ); 22 //加载静态应用组件 23 $this->preloadComponents (); 24 //这才开始初始化模块 25 $this->init (); 26 } 27 protected function registerCoreComponents() { 28 $components = array ( 29 'request' => array ( 30 'class' => 'CHttpRequest' 31 ), 32 'urlManager' => array ( 33 'class' => 'CUrlManager' 34 ) 35 ); 36 37 $this->setComponents ( $components );//父类实现 38 } 39 public function run() { 40 $this->processRequest (); 41 } 42 public function getId() { 43 if ($this->_id !== null) 44 return $this->_id; 45 else 46 return $this->_id = sprintf ( '%x', crc32 ( $this->getBasePath () . $this->name ) ); 47 } 48 public function setId($id) { 49 $this->_id = $id; 50 } 51 public function getBasePath() { 52 return $this->_basePath; 53 } 54 public function setBasePath($path) { 55 if (($this->_basePath = realpath ( $path )) === false || ! is_dir ( $this->_basePath )) 56 return; 57 } 58 public function getDb() { 59 return $this->getComponent ( 'db' );//父类实现 60 } 61 public function getUrlManager() { 62 return $this->getComponent ( 'urlManager' ); 63 } 64 public function getController() { 65 return null; 66 } 67 public function getBaseUrl($absolute = false) { 68 return $this->getRequest ()->getBaseUrl ( $absolute ); 69 } 70 }
run()又用了CWebApplication里面的processRequest()。薛强大哥(yii作者),架构要不要这样啊.裁剪后当然觉得这样的调用很没意思。
后面的主要在CWebApplication里了。
1 php 2 class CWebApplication extends CApplication { 3 public $controllerNamespace; 4 private $_controllerPath; 5 private $_viewPath; 6 private $_systemViewPath; 7 private $_controller; 8 public $controllerMap=array(); 9 public function processRequest() {//开始执行请求 10 //获取urlManager组件,解析请求,得到controller/action这种格式的string, 11 //并且将隐藏参数与请求的参数一一对应,匹配起来,写入$_REQUEST中 12 $route = $this->getUrlManager ()->parseUrl ($this->getRequest()); 13 $this->runController ( $route ); 14 } 15 public function getRequest() {//获取request组件 16 return $this->getComponent ( 'request' ); 17 } 18 protected function registerCoreComponents() {//注册核心组件 19 parent::registerCoreComponents (); 20 } 21 //执行contronller 22 public function runController($route) { 23 if (($ca = $this->createController ( $route )) !== null) { 24 list ( $controller, $actionID ) = $ca; 25 $oldController = $this->_controller; 26 $this->_controller = $controller; 27 $controller->init ();//钩子,在执行action方法前调用,子类去实现 28 $controller->run ( $actionID );//开始转入controller类中action方法的执行 29 $this->_controller = $oldController; 30 } 31 } 32 //创建controller类实例,从controller/action这种格式的string中解析出$controller, $actionID 33 public function createController($route, $owner = null) { 34 if ($owner === null) 35 $owner = $this; 36 if (($route = trim ( $route, '/' )) === '') 37 $route = $owner->defaultController; 38 39 $route .= '/'; 40 while ( ($pos = strpos ( $route, '/' )) !== false ) { 41 $id = substr ( $route, 0, $pos ); 42 if (! preg_match ( '/^\w+$/', $id )) 43 return null; 44 $id = strtolower ( $id ); 45 $route = ( string ) substr ( $route, $pos + 1 ); 46 if (! isset ( $basePath )) // first segment 47 { 48 $basePath = $owner->getControllerPath (); 49 $controllerID = ''; 50 } else { 51 $controllerID .= '/'; 52 } 53 $className = ucfirst ( $id ) . 'Controller'; 54 $classFile = $basePath . DIRECTORY_SEPARATOR . $className . '.php'; 55 56 if (is_file ( $classFile )) { 57 if (! class_exists ( $className, false )) 58 require ($classFile); 59 if (class_exists ( $className, false ) && is_subclass_of ( $className, 'CController' )) { 60 $id [0] = strtolower ( $id [0] ); 61 return array ( 62 new $className ( $controllerID . $id, $owner === $this ? null : $owner ), 63 $this->parseActionParams ( $route ) 64 ); 65 } 66 return null; 67 } 68 $controllerID .= $id; 69 $basePath .= DIRECTORY_SEPARATOR . $id; 70 } 71 } 72 protected function parseActionParams($pathInfo) { 73 if (($pos = strpos ( $pathInfo, '/' )) !== false) { 74 $manager = $this->getUrlManager ();//再次获取urlManager,在上面第一次调用中已经导入。 75 $manager->parsePathInfo ( ( string ) substr ( $pathInfo, $pos + 1 ) ); 76 $actionID = substr ( $pathInfo, 0, $pos ); 77 return $manager->caseSensitive ? $actionID : strtolower ( $actionID ); 78 } else 79 return $pathInfo; 80 } 81 public function getControllerPath() { 82 if ($this->_controllerPath !== null) 83 return $this->_controllerPath; 84 else 85 return $this->_controllerPath = $this->getBasePath () . DIRECTORY_SEPARATOR . 'controllers'; 86 } 87 //两个钩子,子类去实现 88 public function beforeControllerAction($controller, $action) { 89 return true; 90 } 91 public function afterControllerAction($controller, $action) { 92 } 93 protected function init() { 94 parent::init (); 95 } 96 }
对于$this->getUrlManager (),YiiBase里面有'CUrlManager' => 'CUrlManager.php'这个映射,说明是实例化了CUrlManager这个类。
1 php 2 class CUrlManager { 3 const GET_FORMAT = 'get'; 4 public $rules = array (); 5 public $urlSuffix = ''; 6 public $caseSensitive = true; 7 public $urlRuleClass = 'CUrlRule'; 8 private $_urlFormat = self::GET_FORMAT; 9 private $_rules = array (); 10 private $_baseUrl; 11 protected function processRules() { 12 //遍历自定义的请求匹配规则 13 foreach ( $this->rules as $pattern => $route ) { 14 //对每一个规则创建CUrlRule实例 15 $this->_rules [] = $this->createUrlRule ( $route, $pattern ); 16 } 17 } 18 protected function createUrlRule($route, $pattern) { 19 if (is_array ( $route ) && isset ( $route ['class'] )) 20 return $route; 21 else { 22 //import第二个参数表示是否立即包含类文件。 如果为flase,则类文件仅在被使用时包含。 这个参数仅当使用一个类的路径 别名 时才会用到 23 $urlRuleClass = Yii::import ( $this->urlRuleClass, true ); 24 //创建CUrlRule实例 25 return new $urlRuleClass ( $route, $pattern ); 26 } 27 } 28 //类似于__construct() 29 public function init() { 30 $this->processRules (); 31 } 32 public function parseUrl($request) { 33 //获取请求 34 $rawPathInfo = $request->getPathInfo (); 35 $pathInfo = $this->removeUrlSuffix ( $rawPathInfo, $this->urlSuffix ); 36 foreach ( $this->_rules as $i => $rule ) { 37 if (($r = $rule->parseUrl ( $this, $pathInfo, $rawPathInfo )) !== false) { 38 return $r; 39 } 40 } 41 return $pathInfo; 42 } 43 //解析请求,将请求参数写入$_REQUEST 44 public function parsePathInfo($pathInfo) { 45 if ($pathInfo === '') 46 return; 47 $segs = explode ( '/', $pathInfo . '/' ); 48 $n = count ( $segs ); 49 for($i = 0; $i $n