kohana为静态文件提供缓存机制

来源：互联网发布：2015年度网络流行语编辑：程序博客网时间：2024/05/29 18:30

静态文件指的是： css/js/images

1. 匹配静态文件的方法

// classes/controller/base.phpclass Controller_Base extends Controller {        // match static media filespublic function action_media(){// Generate and check the ETag for this file$this->request->check_cache(sha1($this->request->uri));// Get the file path from the request$file = $this->request->param('file');// Find the file extension$ext = pathinfo($file, PATHINFO_EXTENSION);// Remove the extension from the filename$file = substr($file, 0, -(strlen($ext) + 1));if ($file = Kohana::find_file('media', $file, $ext)){// Send the file content as the response$this->request->response = file_get_contents($file);}else{// Return a 404 status$this->request->status = 404;}// Set the content type for this extension$this->request->headers['Content-Type'] = File::mime_by_ext($ext);$this->request->headers['Content-Length'] = filesize($file);$this->request->headers['Last-Modified'] = date('r', filemtime($file));}}

重点，在上面的 $this->request->check_cache() 方法，注意是利用了 HTTP 头信息的 ETag 作校验。

2. 设置路由

// the media filesRoute::set('media', 'media(/<file>)', array('file' => '.+'))->defaults(array('controller' => 'base','action'     => 'media','file'       => NULL,));

3. 程序会自动把路径在 /media/ 下面的文件做缓存

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