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 #if NET_2_0 && CONFIGURATION_2_0
  43 using WSConfig = System.Web.Services.Configuration.WebServicesSection;
  44 using WSProtocol = System.Web.Services.Configuration.WebServiceProtocols;
  45 #endif
  46
  47 namespace System.Web.Services.Protocols
  48 {
  49         class SessionWrapperHandler : IHttpHandler, IRequiresSessionState
  50         {
  51                 IHttpHandler handler;
  52
  53                 public SessionWrapperHandler (IHttpHandler handler)
  54                 {
  55                         this.handler = handler;
  56                 }
  57
  58                 public bool IsReusable {
  59                         get { return handler.IsReusable; }
  60                 }
  61
  62                 public void ProcessRequest (HttpContext context)
  63                 {
  64                         handler.ProcessRequest (context);
  65                 }
  66         }
  67
  68         class ReadOnlySessionWrapperHandler : IHttpHandler, IRequiresSessionState, IReadOnlySessionState
  69         {
  70                 IHttpHandler handler;
  71
  72                 public ReadOnlySessionWrapperHandler (IHttpHandler handler)
  73                 {
  74                         this.handler = handler;
  75                 }
  76
  77                 public bool IsReusable {
  78                         get { return handler.IsReusable; }
  79                 }
  80
  81                 public void ProcessRequest (HttpContext context)
  82                 {
  83                         handler.ProcessRequest (context);
  84                 }
  85         }
  86         public class WebServiceHandlerFactory : IHttpHandlerFactory
  87         {
  88
  89                 #region Constructors
  90
  91                 public WebServiceHandlerFactory ()
  92                 {
  93                 }
  94
  95                 #endregion // Constructors
  96
  97                 #region Methods
  98
  99                 public IHttpHandler GetHandler (HttpContext context, string verb, string url, string filePath)
 100                 {
 101                         Type type = WebServiceParser.GetCompiledType (filePath, context);
 102
 103                         WSProtocol protocol = GuessProtocol (context, verb);
 104                         bool supported = false;
 105                         IHttpHandler handler = null;
 106
 107                         supported = WSConfig.IsSupported (protocol);
 108                         if (!supported) {
 109                                 switch (protocol) {
 110                                         case WSProtocol.HttpSoap:
 111                                                 supported = WSConfig.IsSupported (WSProtocol.HttpSoap12);
 112                                                 break;
 113                                         case WSProtocol.HttpPost:
 114                                                 if (WSConfig.IsSupported (WSProtocol.HttpPostLocalhost)) {
 115                                                         string localAddr = context.Request.ServerVariables ["LOCAL_ADDR"];
 116
 117                                                         supported = localAddr != null &&
 118                                                                 (localAddr == context.Request.ServerVariables ["REMOTE_ADDR"] ||
 119                                                                 IPAddress.IsLoopback (IPAddress.Parse (localAddr)));
 120                                                 }
 121                                                 break;
 122                                 }
 123                         }
 124                         if (!supported)
 125                                 throw new InvalidOperationException ("Unsupported request format.");
 126
 127                         switch (protocol) {
 128                         case WSProtocol.HttpSoap:
 129                                 handler = GetTypeHandler (context, new HttpSoapWebServiceHandler (type));
 130                                 break;
 131                         case WSProtocol.HttpPost:
 132                         case WSProtocol.HttpGet:
 133                                 handler = GetTypeHandler (context, new HttpSimpleWebServiceHandler (type, protocol.ToString ()));
 134                                 break;
 135                         case WSProtocol.Documentation:
 136                                 SoapDocumentationHandler soapHandler;
 137                                 soapHandler = new SoapDocumentationHandler (type, context);
 138                                 if (soapHandler.PageHandler is IRequiresSessionState) {
 139                                         if (soapHandler.PageHandler is IReadOnlySessionState)
 140                                                 handler = new ReadOnlySessionWrapperHandler (soapHandler);
 141                                         else
 142                                                 handler = new SessionWrapperHandler (soapHandler);
 143                                 } else {
 144                                         handler = soapHandler;
 145                                 }
 146                                 break;
 147                         }
 148
 149                         return handler;
 150                 }
 151
 152                 IHttpHandler GetTypeHandler (HttpContext context, WebServiceHandler handler)
 153                 {
 154                         MethodStubInfo method = handler.GetRequestMethod (context);
 155                         if (method == null) return null;
 156
 157                         if (method.MethodInfo.EnableSession)
 158                                 return new SessionWrapperHandler (handler);
 159                         else
 160                                 return handler;
 161                 }
 162
 163                 static WSProtocol GuessProtocol (HttpContext context, string verb)
 164                 {
 165                         if (context.Request.PathInfo == null || context.Request.PathInfo == "")
 166                         {
 167                                 if (context.Request.RequestType == "GET")
 168                                         return WSProtocol.Documentation;
 169                                 else
 170                                         return WSProtocol.HttpSoap;
 171                         }
 172                         else
 173                         {
 174                                 if (context.Request.RequestType == "GET")
 175                                         return WSProtocol.HttpGet;
 176                                 else
 177                                         return WSProtocol.HttpPost;
 178                         }
 179                 }
 180
 181                 public void ReleaseHandler (IHttpHandler handler)
 182                 {
 183                 }
 184
 185                 #endregion // Methods
 186         }
 187 }