PHP文件下载过滤类

Java代码  

1. <?php  
2. /** 
3. $filename = 'index.php'; 
4. $download = new Download('php,exe,html', false); 
5. if (!$download->downloadfile($filename)) { 
6.     echo $download->getErrorMsgs(); 
7. } 
8. */  
9. class Download {  
10.     private $debug = false;  
11.     private $errorMsg = '';  
12.     private $filter = array();  
13.     private $fileName = '';  
14.     private $mineType = '';  
15.     private $xlq_filetype = array();  
16.     private $limitTime = 60;  
17.   
18.     /** 
19.      * @param string $fileFilter 
20.      * @param boolean $isDebug 
21.      */  
22.     function __construct($fileFilter = '', $isDebug = true) {  
23.         $this->setFilter($fileFilter);  
24.         $this->setDebug($isDebug);  
25.         $this->setFileType();  
26.     }  
27.   
28.     function downloadfile($filename) {  
29.         $this->fileName = $filename;  
30.         if ($this->filecheck()) {  
31.             $fn = basename($this->fileName);  
32.             ob_end_clean();  
33.             @set_time_limit($this->limitTime);  
34.             header('Cache-control: max-age=31536000');  
35.             header('Expires: ' . gmdate('D, d M Y H:i:s', time() + 31536000) . ' GMT');  
36.             header('Content-Encoding: none');  
37.             header('Content-Length: ' . filesize($this->fileName));  
38.             header('Content-Disposition: attachment; filename=' . $fn);  
39.             header('Content-Type: ' . $this->mineType);  
40.             readfile($this->fileName);  
41.             return true;  
42.         } else {  
43.             return false;  
44.         }  
45.     }  
46.   
47.     function filecheck() {  
48.         $fileName = $this->fileName;  
49.         if (file_exists($fileName)) {  
50.             $fileType = strtolower(array_pop(explode(".", $fileName)));  
51.             if (!in_array($fileType, $this->filter)) {  
52.                 $this->errorMsg .= sprintf("%s 不允许下载", $fileName);  
53.                 if ($this->debug) exit(sprintf("%s 不允许下载", $fileName));  
54.                 return false;  
55.             } else {  
56.                 if (function_exists("mime_content_type")) {  
57.                     $this->mineType = mime_content_type($fileName);  
58.                 }  
59.   
60.                 if (empty($this->mineType)) {  
61.                     if (isset($this->xlq_filetype[$fileType])) {  
62.                         $this->mineType = $this->xlq_filetype[$fileType];  
63.                     }  
64.                 }  
65.   
66.                 if (!empty($this->mineType)) {  
67.                     return true;  
68.                 } else {  
69.                     $this->errorMsg .= "获取文件类型出错";  
70.                     if ($this->debug) exit("获取文件类型出错");  
71.                     return false;  
72.                 }  
73.             }  
74.         } else {  
75.             $this->errorMsg .= sprintf("%s 不存在", $fileName);  
76.             if ($this->debug) exit(sprintf("%s 不存在", $fileName));  
77.             return false;  
78.         }  
79.     }  
80.   
81.     function setFileType() {  
82.         $this->xlq_filetype['chm'] = 'application/octet-stream';  
83.         $this->xlq_filetype['ppt'] = 'application/vnd.ms-powerpoint';  
84.         $this->xlq_filetype['xls'] = 'application/vnd.ms-excel';  
85.         $this->xlq_filetype['doc'] = 'application/msword';  
86.         $this->xlq_filetype['exe'] = 'application/octet-stream';  
87.         $this->xlq_filetype['rar'] = 'application/octet-stream';  
88.         $this->xlq_filetype['js'] = "javascript/js";  
89.         $this->xlq_filetype['css'] = "text/css";  
90.         $this->xlq_filetype['hqx'] = "application/mac-binhex40";  
91.         $this->xlq_filetype['bin'] = "application/octet-stream";  
92.         $this->xlq_filetype['oda'] = "application/oda";  
93.         $this->xlq_filetype['pdf'] = "application/pdf";  
94.         $this->xlq_filetype['ai'] = "application/postsrcipt";  
95.         $this->xlq_filetype['eps'] = "application/postsrcipt";  
96.         $this->xlq_filetype['es'] = "application/postsrcipt";  
97.         $this->xlq_filetype['rtf'] = "application/rtf";  
98.         $this->xlq_filetype['mif'] = "application/x-mif";  
99.         $this->xlq_filetype['csh'] = "application/x-csh";  
100.         $this->xlq_filetype['dvi'] = "application/x-dvi";  
101.         $this->xlq_filetype['hdf'] = "application/x-hdf";  
102.         $this->xlq_filetype['nc'] = "application/x-netcdf";  
103.         $this->xlq_filetype['cdf'] = "application/x-netcdf";  
104.         $this->xlq_filetype['latex'] = "application/x-latex";  
105.         $this->xlq_filetype['ts'] = "application/x-troll-ts";  
106.         $this->xlq_filetype['src'] = "application/x-wais-source";  
107.         $this->xlq_filetype['zip'] = "application/zip";  
108.         $this->xlq_filetype['bcpio'] = "application/x-bcpio";  
109.         $this->xlq_filetype['cpio'] = "application/x-cpio";  
110.         $this->xlq_filetype['gtar'] = "application/x-gtar";  
111.         $this->xlq_filetype['shar'] = "application/x-shar";  
112.         $this->xlq_filetype['sv4cpio'] = "application/x-sv4cpio";  
113.         $this->xlq_filetype['sv4crc'] = "application/x-sv4crc";  
114.         $this->xlq_filetype['tar'] = "application/x-tar";  
115.         $this->xlq_filetype['ustar'] = "application/x-ustar";  
116.         $this->xlq_filetype['man'] = "application/x-troff-man";  
117.         $this->xlq_filetype['sh'] = "application/x-sh";  
118.         $this->xlq_filetype['tcl'] = "application/x-tcl";  
119.         $this->xlq_filetype['tex'] = "application/x-tex";  
120.         $this->xlq_filetype['texi'] = "application/x-texinfo";  
121.         $this->xlq_filetype['texinfo'] = "application/x-texinfo";  
122.         $this->xlq_filetype['t'] = "application/x-troff";  
123.         $this->xlq_filetype['tr'] = "application/x-troff";  
124.         $this->xlq_filetype['roff'] = "application/x-troff";  
125.         $this->xlq_filetype['shar'] = "application/x-shar";  
126.         $this->xlq_filetype['me'] = "application/x-troll-me";  
127.         $this->xlq_filetype['ts'] = "application/x-troll-ts";  
128.         $this->xlq_filetype['gif'] = "image/gif";  
129.         $this->xlq_filetype['jpeg'] = "image/pjpeg";  
130.         $this->xlq_filetype['jpg'] = "image/pjpeg";  
131.         $this->xlq_filetype['jpe'] = "image/pjpeg";  
132.         $this->xlq_filetype['ras'] = "image/x-cmu-raster";  
133.         $this->xlq_filetype['pbm'] = "image/x-portable-bitmap";  
134.         $this->xlq_filetype['ppm'] = "image/x-portable-pixmap";  
135.         $this->xlq_filetype['xbm'] = "image/x-xbitmap";  
136.         $this->xlq_filetype['xwd'] = "image/x-xwindowdump";  
137.         $this->xlq_filetype['ief'] = "image/ief";  
138.         $this->xlq_filetype['tif'] = "image/tiff";  
139.         $this->xlq_filetype['tiff'] = "image/tiff";  
140.         $this->xlq_filetype['pnm'] = "image/x-portable-anymap";  
141.         $this->xlq_filetype['pgm'] = "image/x-portable-graymap";  
142.         $this->xlq_filetype['rgb'] = "image/x-rgb";  
143.         $this->xlq_filetype['xpm'] = "image/x-xpixmap";  
144.         $this->xlq_filetype['txt'] = "text/plain";  
145.         $this->xlq_filetype['c'] = "text/plain";  
146.         $this->xlq_filetype['cc'] = "text/plain";  
147.         $this->xlq_filetype['h'] = "text/plain";  
148.         $this->xlq_filetype['html'] = "text/html";  
149.         $this->xlq_filetype['htm'] = "text/html";  
150.         $this->xlq_filetype['htl'] = "text/html";  
151.         $this->xlq_filetype['rtx'] = "text/richtext";  
152.         $this->xlq_filetype['etx'] = "text/x-setext";  
153.         $this->xlq_filetype['tsv'] = "text/tab-separated-values";  
154.         $this->xlq_filetype['mpeg'] = "video/mpeg";  
155.         $this->xlq_filetype['mpg'] = "video/mpeg";  
156.         $this->xlq_filetype['mpe'] = "video/mpeg";  
157.         $this->xlq_filetype['avi'] = "video/x-msvideo";  
158.         $this->xlq_filetype['qt'] = "video/quicktime";  
159.         $this->xlq_filetype['mov'] = "video/quicktime";  
160.         $this->xlq_filetype['moov'] = "video/quicktime";  
161.         $this->xlq_filetype['movie'] = "video/x-sgi-movie";  
162.         $this->xlq_filetype['au'] = "audio/basic";  
163.         $this->xlq_filetype['snd'] = "audio/basic";  
164.         $this->xlq_filetype['wav'] = "audio/x-wav";  
165.         $this->xlq_filetype['aif'] = "audio/x-aiff";  
166.         $this->xlq_filetype['aiff'] = "audio/x-aiff";  
167.         $this->xlq_filetype['aifc'] = "audio/x-aiff";  
168.         $this->xlq_filetype['swf'] = "application/x-shockwave-flash";  
169.     }  
170.   
171.     function setFilter($fileFilter) {  
172.         if (empty($fileFilter)) return;  
173.         $this->filter = explode(",", strtolower($fileFilter));  
174.     }  
175.   
176.     function setDebug($debug) {  
177.         $this->debug = $debug;  
178.     }  
179.   
180.     function setlimittime($limittime) {  
181.         $this->limitTime = $limittime;  
182.     }  
183.   
184.     function getfilename($filename) {  
185.         return $this->fileName;  
186.     }  
187.   
188.     function getErrorMsgs() {  
189.         return $this->errorMsg;  
190.     }  
191.   
192.     function __destruct() {  
193.         $this->errorMsg = '';  
194.     }  
195. }  
196. ?>