content_type = 'text/plain'; $this->error_type = 0; $this->succeed = TRUE; $request = ltrim($request,'/'); //是否为SAE环境 if(!IS_SAE || !class_exists('SaeStorage')){// $this->error_type = 2; $this->succeed = FALSE; } //请求为空 elseif($request === ''){ //显示欢迎页面 if(WELCOME_DOC){ view::show('welcome'); return ; }else{ $this->error_type = 1; $this->succeed = FALSE; } } else{ //匹配文件后缀 $temp = array(); if(preg_match('/\.(jpg|jpeg|png|pdf|gif|css|js|zip)$/i', $request,$temp)===1){//暂时先就这几种 //http://en.wikipedia.org/wiki/Internet_media_type#List_of_common_media_types switch($temp[1]){ case 'jpg':{$this->content_type="image/jpeg";}break; case 'gif':{$this->content_type="image/gif";}break; case 'png':{$this->content_type="image/png";}break; case 'css':{$this->content_type="text/css";}break; case 'js':{$this->content_type="text/javascript";}break; } } } //开始处理 $this->handle($request); } /** * 获取内容并输出 * 如果stroage里面不存在，则从URL里面获取 * */ private function handle($filename){ $content = ''; if($this->succeed){ $storage = new storage(); if($storage->exists($filename)){ $content = $storage->read($filename); }else{ $content = @file_get_contents(BASE_URL.$filename); $storage->write($filename, $content); } if(empty($content)){ $this->error_type = 3; $this->succeed = FALSE; } } //显示内容 $this->render($content); } /** * 输出结果，包括缓存控制等 * */ private function render($content=''){ if(!$this->succeed){ $this->error(); return ; }else{ header("Expires: " . date("D, j M Y H:i:s GMT", time()+2592000));//缓存一月 header('Content-type: '.$this->content_type); echo $content; } } /** * 处理错误 * */ private function error(){ echo "something seems wrong."; } }