mcs/class/System.ServiceModel/System.ServiceModel.Channels.Http/HttpChannelListenerEntry.cs

   1 //
   2 // HttpChannelListenerEntry.cs
   3 //
   4 // Author:
   5 //      Atsushi Enomoto <atsushi@ximian.com>
   6 //
   7 // Copyright (C) 2010 Novell, Inc.  http://www.novell.com
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28 using System;
  29 using System.Collections.Generic;
  30 using System.Collections.ObjectModel;
  31 using System.Linq;
  32 using System.Net;
  33 using System.Net.Security;
  34 using System.ServiceModel;
  35 using System.ServiceModel.Channels;
  36 using System.ServiceModel.Description;
  37 using System.ServiceModel.Dispatcher;
  38 using System.ServiceModel.Security;
  39 using System.Text;
  40 using System.Threading;
  41
  42 namespace System.ServiceModel.Channels.Http
  43 {
  44         class HttpChannelListenerEntry
  45         {
  46                 public HttpChannelListenerEntry (ChannelDispatcher channel, EventWaitHandle waitHandle)
  47                 {
  48                         ChannelDispatcher = channel;
  49                         WaitHandle = waitHandle;
  50                         ContextQueue = new Queue<HttpContextInfo> ();
  51                         RetrieverLock = new object ();
  52                 }
  53
  54                 public object RetrieverLock { get; private set; }
  55                 public ChannelDispatcher ChannelDispatcher { get; private set; }
  56                 public EventWaitHandle WaitHandle { get; private set; }
  57                 public Queue<HttpContextInfo> ContextQueue { get; private set; }
  58
  59                 internal static int CompareEntries (HttpChannelListenerEntry e1, HttpChannelListenerEntry e2)
  60                 {
  61                         if (e1.ChannelDispatcher.Endpoints.Count == 0)
  62                                 return 1;
  63                         if (e2.ChannelDispatcher.Endpoints.Count == 0)
  64                                 return -1;
  65                         // select the highest filter priority value in the Endpoints.
  66                         int p1 = e1.ChannelDispatcher.Endpoints.OrderByDescending (e => e.FilterPriority).First ().FilterPriority;
  67                         int p2 = e2.ChannelDispatcher.Endpoints.OrderByDescending (e => e.FilterPriority).First ().FilterPriority;
  68                         // then return the channel dispatcher with higher priority first.
  69                         return p2 - p1;
  70                 }
  71
  72                 const UriComponents cmpflag = UriComponents.Path;
  73                 const UriFormat fmtflag = UriFormat.SafeUnescaped;
  74
  75                 internal bool FilterHttpContext (HttpContextInfo ctx)
  76                 {
  77                         if (ChannelDispatcher == null)
  78                                 return true; // no mex can be involved.
  79                         if (ctx.Request.HttpMethod.ToUpper () != "GET")
  80                                 return !ChannelDispatcher.IsMex; // non-GET request never matches mex channel dispatcher.
  81                         var sme = ChannelDispatcher.Host.Extensions.Find<ServiceMetadataExtension> ();
  82                         if (sme == null)
  83                                 return true; // no mex can be involved.
  84
  85                         var listener = ChannelDispatcher.Listener;
  86                         var mex = sme.Instance;
  87
  88                         // now the request is GET, and we have to return true or false based on the matrix below:
  89                         // matches wsdl or help| yes      |  no      |
  90                         // mex                 | yes | no | yes | no |
  91                         // --------------------+-----+----+-----+----+
  92                         //                     |  T  | F  |  F  |  T |
  93
  94                         bool match =
  95                                 (mex.WsdlUrl != null && Uri.Compare (ctx.Request.Url, mex.WsdlUrl, cmpflag, fmtflag, StringComparison.Ordinal) == 0) ||
  96                                 (mex.HelpUrl != null && Uri.Compare (ctx.Request.Url, mex.HelpUrl, cmpflag, fmtflag, StringComparison.Ordinal) == 0);
  97
  98                         return !(match ^ ChannelDispatcher.IsMex);
  99                 }
 100         }
 101 }