【thinkphp3.x】ThinkPHP/Lib/Core/App.class.php文件分析

// +----------------------------------------------------------------------

/**
 * ThinkPHP 应用程序类 执行应用过程管理
 * 可以在模式扩展中重新定义 但是必须具有Run方法接口
 * @category   Think
 * @package  Think
 * @subpackage  Core
 * @author    liu21st 
 */
class App {

    /**
     * 应用程序初始化
     * @access public
     * @return void
     */
    static public function init() {
        // 设置系统时区
        date_default_timezone_set(C('DEFAULT_TIMEZONE'));//系统默认的时区
        // 加载动态项目公共文件和配置,加载未必编译进~runtime.php文件中的项目配置文件
        load_ext_file();
        // URL调度
        Dispatcher::dispatch();

        // 定义当前请求的系统常量
        define('NOW_TIME',      $_SERVER['REQUEST_TIME']);					//请求时间
        define('REQUEST_METHOD',$_SERVER['REQUEST_METHOD']);				//请求方法
        define('IS_GET',        REQUEST_METHOD =='GET' ? true : false);		//get方法
        define('IS_POST',       REQUEST_METHOD =='POST' ? true : false);	//post方法
        define('IS_PUT',        REQUEST_METHOD =='PUT' ? true : false);		//put方法
        define('IS_DELETE',     REQUEST_METHOD =='DELETE' ? true : false);	//delete方法
        //判断是否是ajax请求
        define('IS_AJAX',       ((isset($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH'] == 'xmlhttprequest')) || !empty($_POST[C('VAR_AJAX_SUBMIT')]) || !empty($_GET[C('VAR_AJAX_SUBMIT')])) ? true : false);

        if(defined('GROUP_NAME')) { //如果定义了分组，则加载分组的配置文件和函数文件
            // 加载分组配置文件
            if(is_file(CONF_PATH.GROUP_NAME.'/config.php'))
                C(include CONF_PATH.GROUP_NAME.'/config.php');
            // 加载分组函数文件
            if(is_file(COMMON_PATH.GROUP_NAME.'/function.php'))
                include COMMON_PATH.GROUP_NAME.'/function.php';
        }
        
        // 页面压缩输出支持
        if(!ini_get('zlib.output_compression') && C('OUTPUT_ENCODE')) ob_start('ob_gzhandler');
        
        // 系统变量安全过滤,默认值为空
        if(C('VAR_FILTERS')) {					 //全局系统变量的默认过滤方法 多个用逗号分割,默认值为空
            $filters    =   explode(',',C('VAR_FILTERS'));
            foreach($filters as $filter){
                // 全局参数过滤
                $_POST  =   array_map($filter,$_POST);
                $_GET   =   array_map($filter,$_GET);
            }
        }

        /* 获取模板主题名称 */
        $templateSet =  C('DEFAULT_THEME');//配置文件中，默认值为空
        
        if(C('TMPL_DETECT_THEME')) {// 自动侦测模板主题，配置文件中默认值为false
            $t = C('VAR_TEMPLATE');
            if (isset($_GET[$t])){
                $templateSet = $_GET[$t];
            }elseif(cookie('think_template')){
                $templateSet = cookie('think_template');
            }
            // 主题不存在时仍改回使用默认主题
            if(!is_dir(TMPL_PATH.$templateSet))
                $templateSet = C('DEFAULT_THEME');
            cookie('think_template',$templateSet);
        }
        
        /* 模板相关目录常量 */
        define('THEME_NAME',   $templateSet);                  // 当前模板主题名称
        
        //判断是否定义了分组，如果定了分组，则$group的值为分组名称，否则为空
        $group   =  defined('GROUP_NAME')?GROUP_NAME.'/':'';
        
        //模板主题的路径：./xmall/Tpl/分组名/模板主题 名/
        define('THEME_PATH',   TMPL_PATH.$group.(THEME_NAME?THEME_NAME.'/':''));
        
        //项目模板路径，如：根目录/xmall/Tpl/分组名 /模板主题名/;			APP_NAME[项目名称]-'xmall'      'TMPL_PATH'[项目模板目录]-'./xmall/Tpl/'
        define('APP_TMPL_PATH',__ROOT__.'/'.APP_NAME.(APP_NAME?'/':'').basename(TMPL_PATH).'/'.$group.(THEME_NAME?THEME_NAME.'/':''));
        
        //模板的名称：./xmall/Tpl/分组名/模板主题 名/模块名/方法名.html      TMPL_FILE_DEPR： 模板文件MODULE_NAME与ACTION_NAME之间的分割符，只对项目分组部署有效，默认值为'/'
        //TMPL_TEMPLATE_SUFFIX-默认后缀名，默认值为'.html'
        C('TEMPLATE_NAME',THEME_PATH.MODULE_NAME.(defined('GROUP_NAME')?C('TMPL_FILE_DEPR'):'/').ACTION_NAME.C('TMPL_TEMPLATE_SUFFIX'));
        
        //设置CACHE_PATH的值为：./xmall/runtime/Cache/分组名/
        C('CACHE_PATH',CACHE_PATH.$group);
        //动态配置 TMPL_EXCEPTION_FILE,改为绝对地址
        C('TMPL_EXCEPTION_FILE',realpath(C('TMPL_EXCEPTION_FILE')));//异常页面的模板文件
        return ;
    }

    /**
     * 执行应用程序
     * @access public
     * @return void
     */
    static public function exec() {
    	//模块名是否都是字母组成
        if(!preg_match('/^[A-Za-z](\w)*$/',MODULE_NAME)){ // 安全检测
            $module  =  false;
        }else{
            //创建Action控制器实例
            $group   =  defined('GROUP_NAME') ? GROUP_NAME.'/' : '';
            //如果存在分组
            $module  =  A($group.MODULE_NAME);
        }
		
        //如果模块名不符合规则
        if(!$module) {
            if('4e5e5d7364f443e28fbf0d3ae744a59a' == MODULE_NAME) {
                header("Content-type:image/png");
                exit(base64_decode(App::logo()));
            }
            if(function_exists('__hack_module')) {
                // hack 方式定义扩展模块 返回Action对象
                $module = __hack_module();
                if(!is_object($module)) {
                    // 不再继续执行 直接返回
                    return ;
                }
            }else{
                // 是否定义Empty模块
                $module = A($group.'Empty');
                if(!$module){
                    _404(L('_MODULE_NOT_EXIST_').':'.MODULE_NAME);
                }
            }
        }
        // 获取当前操作名 支持动态路由, 当前操作方法
        $action = C('ACTION_NAME')?C('ACTION_NAME'):ACTION_NAME;
        
        //路径：./xmall/Tpl/分组名/模板主题名/模块名/方法名.html
        C('TEMPLATE_NAME',THEME_PATH.MODULE_NAME.(defined('GROUP_NAME')?C('TMPL_FILE_DEPR'):'/').$action.C('TMPL_TEMPLATE_SUFFIX'));
        
        //action_后缀名()
        $action .=  C('ACTION_SUFFIX');
        try{
        	//合法的方法名也是由字母组成的
            if(!preg_match('/^[A-Za-z](\w)*$/',$action)){
                // 非法操作
                throw new ReflectionException();
            }
            //执行当前操作，这里用到了php的反射类机制
            $method =   new ReflectionMethod($module, $action);
            
            //检测方法是不是public类型的方法
            if($method->isPublic()) {
            	
            	//利用反射机制创建一个控制器类
                $class  =   new ReflectionClass($module);
                
                // 前置操作
                if($class->hasMethod('_before_'.$action)) {
                    $before =   $class->getMethod('_before_'.$action);
                    if($before->isPublic()) {
                        $before->invoke($module);
                    }
                }
                // URL参数绑定检测，即：将URL变量绑定到Action方法参数
                if(C('URL_PARAMS_BIND') && $method->getNumberOfParameters()>0){
                    switch($_SERVER['REQUEST_METHOD']) {
                        case 'POST':
                            $vars    =  $_POST;//post方法提交过来的变量，赋给$vars
                            break;
                        case 'PUT':
                            parse_str(file_get_contents('php://input'), $vars);
                            break;
                        default:
                            $vars  =  $_GET;//get方法提交过来的方法,赋给$vars
                    }
                    $params =  $method->getParameters();//获取所有的参数
                    foreach ($params as $param){
                        $name = $param->getName();//参数的名称
                        if(isset($vars[$name])) {
                            $args[] =  $vars[$name];//参数的值
                        }elseif($param->isDefaultValueAvailable()){
                            $args[] = $param->getDefaultValue();
                        }else{
                            throw_exception(L('_PARAM_ERROR_').':'.$name);
                        }
                    }
                    $method->invokeArgs($module,$args);//执行
                }else{
                    $method->invoke($module);
                }
                // 后置操作
                if($class->hasMethod('_after_'.$action)) {
                    $after =   $class->getMethod('_after_'.$action);
                    if($after->isPublic()) {
                        $after->invoke($module);
                    }
                }
            }else{
                // 操作方法不是Public 抛出异常
                throw new ReflectionException();
            }
        } catch (ReflectionException $e) { 
            // 方法调用发生异常后 引导到__call方法处理
            $method = new ReflectionMethod($module,'__call');
            $method->invokeArgs($module,array($action,''));
        }
        return ;
    }

    /**
     * 运行应用实例 入口文件使用的快捷方法
     * @access public
     * @return void
     */
    static public function run() {
        // 项目初始化标签，在Think.class.php文件中已赋过值，请参考第81行代码
        tag('app_init');
        App::init();
        // 项目开始标签
        tag('app_begin');
        // Session初始化
        session(C('SESSION_OPTIONS'));
        // 记录应用初始化时间
        G('initTime');
        App::exec();
        // 项目结束标签
        tag('app_end');
        // 保存日志记录
        if(C('LOG_RECORD')) Log::save();
        return ;
    }

    static public function logo(){
        return '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';
    }
}