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.Net;
  37 using System.Web.Services;
  38 using System.Web.Services.Configuration;
  39 using System.Web.SessionState;
  40 using System.Web.UI;
  41 using System.Collections.Specialized;
  42
  43 namespace System.Web.Services.Protocols
  44 {
  45         class SessionWrapperHandler : IHttpHandler, IRequiresSessionState
  46         {
  47                 IHttpHandler handler;
  48
  49                 public SessionWrapperHandler (IHttpHandler handler)
  50                 {
  51                         this.handler = handler;
  52                 }
  53
  54                 public bool IsReusable {
  55                         get { return handler.IsReusable; }
  56                 }
  57
  58                 public void ProcessRequest (HttpContext context)
  59                 {
  60                         handler.ProcessRequest (context);
  61                 }
  62         }
  63
  64         class ReadOnlySessionWrapperHandler : IHttpHandler, IRequiresSessionState, IReadOnlySessionState
  65         {
  66                 IHttpHandler handler;
  67
  68                 public ReadOnlySessionWrapperHandler (IHttpHandler handler)
  69                 {
  70                         this.handler = handler;
  71                 }
  72
  73                 public bool IsReusable {
  74                         get { return handler.IsReusable; }
  75                 }
  76
  77                 public void ProcessRequest (HttpContext context)
  78                 {
  79                         handler.ProcessRequest (context);
  80                 }
  81         }
  82         public class WebServiceHandlerFactory : IHttpHandlerFactory
  83         {
  84
  85                 #region Constructors
  86
  87                 public WebServiceHandlerFactory ()
  88                 {
  89                 }
  90
  91                 #endregion // Constructors
  92
  93                 #region Methods
  94
  95                 public IHttpHandler GetHandler (HttpContext context, string verb, string url, string filePath)
  96                 {
  97                         Type type = WebServiceParser.GetCompiledType (filePath, context);
  98
  99                         WSProtocol protocol = GuessProtocol (context, verb);
 100                         bool supported = false;
 101                         IHttpHandler handler = null;
 102
 103                         supported = WSConfig.IsSupported (protocol);
 104                         if (!supported) {
 105                                 switch (protocol) {
 106                                         case WSProtocol.HttpSoap:
 107                                                 supported = WSConfig.IsSupported (WSProtocol.HttpSoap12);
 108                                                 break;
 109                                         case WSProtocol.HttpPost:
 110                                                 if (WSConfig.IsSupported (WSProtocol.HttpPostLocalhost)) {
 111                                                         string localAddr = context.Request.ServerVariables ["LOCAL_ADDR"];
 112
 113                                                         supported = localAddr != null &&
 114                                                                 (localAddr == context.Request.ServerVariables ["REMOTE_ADDR"] ||
 115                                                                 IPAddress.IsLoopback (IPAddress.Parse (localAddr)));
 116                                                 }
 117                                                 break;
 118                                 }
 119                         }
 120                         if (!supported)
 121                                 throw new InvalidOperationException ("Unsupported request format.");
 122
 123                         switch (protocol) {
 124                         case WSProtocol.HttpSoap:
 125                                 handler = GetTypeHandler (context, new HttpSoapWebServiceHandler (type));
 126                                 break;
 127                         case WSProtocol.HttpPost:
 128                         case WSProtocol.HttpGet:
 129                                 handler = GetTypeHandler (context, new HttpSimpleWebServiceHandler (type, protocol.ToString ()));
 130                                 break;
 131                         case WSProtocol.Documentation:
 132                                 SoapDocumentationHandler soapHandler;
 133                                 soapHandler = new SoapDocumentationHandler (type, context);
 134                                 if (soapHandler.PageHandler is IRequiresSessionState) {
 135                                         if (soapHandler.PageHandler is IReadOnlySessionState)
 136                                                 handler = new ReadOnlySessionWrapperHandler (soapHandler);
 137                                         else
 138                                                 handler = new SessionWrapperHandler (soapHandler);
 139                                 } else {
 140                                         handler = soapHandler;
 141                                 }
 142                                 break;
 143                         }
 144
 145                         return handler;
 146                 }
 147
 148                 IHttpHandler GetTypeHandler (HttpContext context, WebServiceHandler handler)
 149                 {
 150                         MethodStubInfo method = handler.GetRequestMethod (context);
 151                         if (method == null) return null;
 152
 153                         if (method.MethodInfo.EnableSession)
 154                                 return new SessionWrapperHandler (handler);
 155                         else
 156                                 return handler;
 157                 }
 158
 159                 static WSProtocol GuessProtocol (HttpContext context, string verb)
 160                 {
 161                         if (context.Request.PathInfo == null || context.Request.PathInfo == "")
 162                         {
 163                                 if (context.Request.RequestType == "GET")
 164                                         return WSProtocol.Documentation;
 165                                 else
 166                                         return WSProtocol.HttpSoap;
 167                         }
 168                         else
 169                         {
 170                                 if (context.Request.RequestType == "GET")
 171                                         return WSProtocol.HttpGet;
 172                                 else
 173                                         return WSProtocol.HttpPost;
 174                         }
 175                 }
 176
 177                 public void ReleaseHandler (IHttpHandler handler)
 178                 {
 179                 }
 180
 181                 #endregion // Methods
 182         }
 183 }