2005-11-02 Gonzalo Paniagua Javier <gonzalo@ximian.com>
[mono.git] / mcs / class / System.Web / System.Web / StaticFileHandler.cs
1 //
2 // System.Web.StaticFileHandler
3 //
4 // Authors:
5 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
6 //
7 // (C) 2002 Ximian, Inc (http://www.ximian.com)
8 //
9
10 //
11 // Permission is hereby granted, free of charge, to any person obtaining
12 // a copy of this software and associated documentation files (the
13 // "Software"), to deal in the Software without restriction, including
14 // without limitation the rights to use, copy, modify, merge, publish,
15 // distribute, sublicense, and/or sell copies of the Software, and to
16 // permit persons to whom the Software is furnished to do so, subject to
17 // the following conditions:
18 // 
19 // The above copyright notice and this permission notice shall be
20 // included in all copies or substantial portions of the Software.
21 // 
22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29 //
30
31 using System;
32 using System.Globalization;
33 using System.IO;
34
35 namespace System.Web
36 {
37         class StaticFileHandler : IHttpHandler
38         {
39                 public void ProcessRequest (HttpContext context)
40                 {
41                         HttpRequest request = context.Request;
42                         HttpResponse response = context.Response;
43                         string fileName = request.PhysicalPath;
44                         FileInfo fi = new FileInfo (fileName);
45                         if (!fi.Exists)
46                                 throw new HttpException (404, "File '" + request.FilePath + "' not found.");
47
48                         if ((fi.Attributes & FileAttributes.Directory) != 0) {
49                                 response.Redirect (request.Path + '/');
50                                 return;
51                         }
52
53                         string strHeader = request.Headers ["If-Modified-Since"];
54                         try {
55                                 if (strHeader != null) {
56                                         DateTime dtIfModifiedSince = DateTime.ParseExact (strHeader, "r", null);
57                                         DateTime ftime = fi.LastWriteTime.ToUniversalTime ();
58                                         if (ftime <= dtIfModifiedSince) {
59                                                 response.StatusCode = 304;
60                                                 return;
61                                         }
62                                 }
63                         } catch { } 
64
65                         try {
66                                 DateTime lastWT = fi.LastWriteTime.ToUniversalTime ();
67                                 response.AddHeader ("Last-Modified", lastWT.ToString ("r"));
68
69                                 response.ContentType = MimeTypes.GetMimeType (fileName);
70                                 response.TransmitFile (fileName, true);
71                         } catch (Exception e) {
72                                 throw new HttpException (403, "Forbidden.");
73                         }
74                 }
75
76                 public bool IsReusable {
77                         get { return true; }
78                 }
79         }
80 }
81