MonoRail/Castle.MonoRail.Framework/ResourceFileHandler.cs

   1 // Copyright 2004-2007 Castle Project - http://www.castleproject.org/
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 namespace Castle.MonoRail.Framework
  16 {
  17         using System;
  18         using System.Web;
  19         using Services;
  20
  21         /// <summary>
  22         /// Handles the service of static files (usually js files)
  23         /// </summary>
  24         public class ResourceFileHandler : IHttpHandler
  25         {
  26                 private readonly UrlInfo urlInfo;
  27                 private readonly IStaticResourceRegistry staticResourceRegistry;
  28
  29                 /// <summary>
  30                 /// Initializes a new instance of the <see cref="ResourceFileHandler"/> class.
  31                 /// </summary>
  32                 /// <param name="urlInfo">The URL info.</param>
  33                 /// <param name="staticResourceRegistry">The static resource registry.</param>
  34                 public ResourceFileHandler(UrlInfo urlInfo, IStaticResourceRegistry staticResourceRegistry)
  35                 {
  36                         this.urlInfo = urlInfo;
  37                         this.staticResourceRegistry = staticResourceRegistry;
  38                 }
  39
  40                 /// <summary>
  41                 /// Enables processing of HTTP Web requests by a custom HttpHandler that implements the <see cref="T:System.Web.IHttpHandler"/> interface.
  42                 /// </summary>
  43                 /// <param name="context">An <see cref="T:System.Web.HttpContext"/> object that provides references to the intrinsic server objects (for example, Request, Response, Session, and Server) used to service HTTP requests.</param>
  44                 public void ProcessRequest(HttpContext context)
  45                 {
  46                         string name = context.Request.QueryString["name"];
  47                         string location = context.Request.QueryString["location"];
  48                         string version = context.Request.QueryString["version"];
  49
  50                         if (name == null)
  51                         {
  52                                 name = urlInfo.Action;
  53                         }
  54
  55                         try
  56                         {
  57                                 if (!staticResourceRegistry.Exists(name, location, version))
  58                                 {
  59                                         context.Response.StatusCode = 404;
  60
  61                                         return;
  62                                 }
  63
  64                                 string mimeType;
  65                                 string content = staticResourceRegistry.GetResource(name, location, version, out mimeType);
  66
  67                                 context.Response.ContentType = mimeType;
  68                                 context.Response.Write(content);
  69                         }
  70                         catch(Exception)
  71                         {
  72                                 context.Response.StatusCode = 500;
  73
  74                                 throw;
  75                         }
  76                 }
  77
  78                 /// <summary>
  79                 /// Gets a value indicating whether another request can use the <see cref="T:System.Web.IHttpHandler"/> instance.
  80                 /// </summary>
  81                 /// <value></value>
  82                 /// <returns>true if the <see cref="T:System.Web.IHttpHandler"/> instance is reusable; otherwise, false.</returns>
  83                 public bool IsReusable
  84                 {
  85                         get { return false; }
  86                 }
  87         }
  88 }