114 lines
3.4 KiB
C#
114 lines
3.4 KiB
C#
//
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// System.Web.StaticFileHandler
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//
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// Authors:
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// Gonzalo Paniagua Javier (gonzalo@ximian.com)
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//
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// (C) 2002 Ximian, Inc (http://www.ximian.com)
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// (C) 2003-2009 Novell, Inc (http://novell.com)
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//
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Globalization;
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using System.IO;
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using System.Web.Util;
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using System.Web.Hosting;
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namespace System.Web
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{
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class StaticFileHandler : IHttpHandler
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{
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static bool ValidFileName (string fileName)
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{
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if (!RuntimeHelpers.RunningOnWindows)
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return true;
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if (fileName == null || fileName.Length == 0)
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return false;
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return (!StrUtils.EndsWith (fileName, " ") && !StrUtils.EndsWith (fileName, "."));
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}
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public void ProcessRequest (HttpContext context)
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{
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HttpRequest request = context.Request;
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HttpResponse response = context.Response;
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if (HostingEnvironment.HaveCustomVPP) {
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VirtualFile vf = null;
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VirtualPathProvider vpp = HostingEnvironment.VirtualPathProvider;
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string vpath = request.FilePath;
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if (vpp.FileExists (vpath))
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vf = vpp.GetFile (vpath);
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if (vf == null)
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throw new HttpException (404, "Path '" + vpath + "' was not found.", vpath);
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response.ContentType = MimeTypes.GetMimeType (vpath);
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response.TransmitFile (vf, true);
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return;
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}
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string fileName = request.PhysicalPath;
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FileInfo fi = new FileInfo (fileName);
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if (!fi.Exists || !ValidFileName (fileName))
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throw new HttpException (404, "Path '" + request.FilePath + "' was not found.", request.FilePath);
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if ((fi.Attributes & FileAttributes.Directory) != 0) {
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response.Redirect (request.Path + '/');
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return;
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}
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string strHeader = request.Headers ["If-Modified-Since"];
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try {
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if (strHeader != null) {
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DateTime dtIfModifiedSince = DateTime.ParseExact (strHeader, "r", null);
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DateTime ftime;
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ftime = fi.LastWriteTime.ToUniversalTime ();
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if (ftime <= dtIfModifiedSince) {
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response.ContentType = MimeTypes.GetMimeType (fileName);
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response.StatusCode = 304;
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return;
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}
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}
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} catch { }
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try {
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DateTime lastWT = fi.LastWriteTime.ToUniversalTime ();
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response.AddHeader ("Last-Modified", lastWT.ToString ("r"));
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response.ContentType = MimeTypes.GetMimeType (fileName);
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response.TransmitFile (fileName, true);
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} catch (Exception) {
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throw new HttpException (403, "Forbidden.");
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}
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}
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public bool IsReusable {
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get { return true; }
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}
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}
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}
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