1. public function downFile() {  
2.     $file = $this->request->param(‘file‘);  
3.     $type = $this->request->param(‘type‘);  
4.     if (empty($file) || empty($type) || !in_array($type, array("zip", "sql"))) {  
5.         $this->error("下载地址不存在");  
6.     }  
7.     $path = array("zip" => $this->datadir."zipdata/", "sql" => $this->datadir);  
8.     $filePath = $path[$type] . $file;  
9.     if (!file_exists($filePath)) {  
10. 10.         $this->error("该文件不存在，可能是被删除");  
11. 11.     }  
12. 12.     $filename = basename($filePath);  
13. 13.     header("Content-type: application/octet-stream");  
14. 14.     header(‘Content-Disposition: attachment; filename="‘ . $filename . ‘"‘);  
15. 15.     header("Content-Length: " . filesize($filePath));  
16. 16.     readfile($filePath);  

17. }