mcs/class/System.Web.Services/System.Web.Services.Protocols/WebServiceHandlerFactory.cs

   1 //
   2 // System.Web.Services.Protocols.WebServiceHandlerFactory.cs
   3 //
   4 // Authors:
   5 //      Tim Coleman (tim@timcoleman.com)
   6 //      Dave Bettin (dave@opendotnet.com)
   7 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   8 //      Lluis Sanchez Gual (lluis@ximian.com)
   9 //
  10 // Copyright (C) Tim Coleman, 2002
  11 // Copyright (c) 2003 Ximian, Inc. (http://www.ximian.com)
  12 //
  13
  14 //
  15 // Permission is hereby granted, free of charge, to any person obtaining
  16 // a copy of this software and associated documentation files (the
  17 // "Software"), to deal in the Software without restriction, including
  18 // without limitation the rights to use, copy, modify, merge, publish,
  19 // distribute, sublicense, and/or sell copies of the Software, and to
  20 // permit persons to whom the Software is furnished to do so, subject to
  21 // the following conditions:
  22 //
  23 // The above copyright notice and this permission notice shall be
  24 // included in all copies or substantial portions of the Software.
  25 //
  26 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  30 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  31 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  32 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  33 //
  34
  35 using System.IO;
  36 using System.Web.Services;
  37 using System.Web.Services.Configuration;
  38 using System.Web.SessionState;
  39 using System.Web.UI;
  40 using System.Collections.Specialized;
  41
  42 namespace System.Web.Services.Protocols
  43 {
  44         class DummyHttpHandler : IHttpHandler
  45         {
  46                 bool IHttpHandler.IsReusable {
  47                         get { return false; }
  48                 }
  49
  50                 void IHttpHandler.ProcessRequest (HttpContext context)
  51                 {
  52                         // Do nothing
  53                 }
  54         }
  55
  56         class SessionWrapperHandler : IHttpHandler, IRequiresSessionState
  57         {
  58                 IHttpHandler handler;
  59
  60                 public SessionWrapperHandler (IHttpHandler handler)
  61                 {
  62                         this.handler = handler;
  63                 }
  64
  65                 public bool IsReusable {
  66                         get { return handler.IsReusable; }
  67                 }
  68
  69                 public void ProcessRequest (HttpContext context)
  70                 {
  71                         handler.ProcessRequest (context);
  72                 }
  73         }
  74
  75         class ReadOnlySessionWrapperHandler : IHttpHandler, IRequiresSessionState, IReadOnlySessionState
  76         {
  77                 IHttpHandler handler;
  78
  79                 public ReadOnlySessionWrapperHandler (IHttpHandler handler)
  80                 {
  81                         this.handler = handler;
  82                 }
  83
  84                 public bool IsReusable {
  85                         get { return handler.IsReusable; }
  86                 }
  87
  88                 public void ProcessRequest (HttpContext context)
  89                 {
  90                         handler.ProcessRequest (context);
  91                 }
  92         }
  93         public class WebServiceHandlerFactory : IHttpHandlerFactory
  94         {
  95
  96                 #region Constructors
  97
  98                 public WebServiceHandlerFactory ()
  99                 {
 100                 }
 101
 102                 #endregion // Constructors
 103
 104                 #region Methods
 105
 106                 public IHttpHandler GetHandler (HttpContext context, string verb, string url, string filePath)
 107                 {
 108                         Type type = WebServiceParser.GetCompiledType (filePath, context);
 109
 110                         WSProtocol protocol = GuessProtocol (context, verb);
 111                         IHttpHandler handler = null;
 112
 113                         if (!WSConfig.IsSupported (protocol))
 114                                 return new DummyHttpHandler ();
 115
 116                         switch (protocol) {
 117                         case WSProtocol.HttpSoap:
 118                                 handler = GetTypeHandler (context, new HttpSoapWebServiceHandler (type));
 119                                 break;
 120                         case WSProtocol.HttpPost:
 121                         case WSProtocol.HttpGet:
 122                                 handler = GetTypeHandler (context, new HttpSimpleWebServiceHandler (type, protocol.ToString ()));
 123                                 break;
 124                         case WSProtocol.Documentation:
 125                                 SoapDocumentationHandler soapHandler;
 126                                 soapHandler = new SoapDocumentationHandler (type, context);
 127                                 if (soapHandler.PageHandler is IRequiresSessionState) {
 128                                         if (soapHandler.PageHandler is IReadOnlySessionState)
 129                                                 handler = new ReadOnlySessionWrapperHandler (soapHandler);
 130                                         else
 131                                                 handler = new SessionWrapperHandler (soapHandler);
 132                                 } else {
 133                                         handler = soapHandler;
 134                                 }
 135                                 break;
 136                         }
 137
 138                         return handler;
 139                 }
 140
 141                 IHttpHandler GetTypeHandler (HttpContext context, WebServiceHandler handler)
 142                 {
 143                         MethodStubInfo method = handler.GetRequestMethod (context);
 144                         if (method == null) return null;
 145
 146                         if (method.MethodInfo.EnableSession)
 147                                 return new SessionWrapperHandler (handler);
 148                         else
 149                                 return handler;
 150                 }
 151
 152                 static WSProtocol GuessProtocol (HttpContext context, string verb)
 153                 {
 154                         if (context.Request.PathInfo == null || context.Request.PathInfo == "")
 155                         {
 156                                 if (context.Request.RequestType == "GET")
 157                                         return WSProtocol.Documentation;
 158                                 else
 159                                         return WSProtocol.HttpSoap;
 160                         }
 161                         else
 162                         {
 163                                 if (context.Request.RequestType == "GET")
 164                                         return WSProtocol.HttpGet;
 165                                 else
 166                                         return WSProtocol.HttpPost;
 167                         }
 168                 }
 169
 170                 public void ReleaseHandler (IHttpHandler handler)
 171                 {
 172                 }
 173
 174                 #endregion // Methods
 175         }
 176 }