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.Compilation;
  38 using System.Web.Services;
  39 using System.Web.Services.Configuration;
  40 using System.Web.SessionState;
  41 using System.Web.UI;
  42 using System.Collections.Specialized;
  43 using WSConfig = System.Web.Services.Configuration.WebServicesSection;
  44 using WSProtocol = System.Web.Services.Configuration.WebServiceProtocols;
  45
  46 namespace System.Web.Services.Protocols
  47 {
  48         class SessionWrapperHandler : IHttpHandler, IRequiresSessionState
  49         {
  50                 IHttpHandler handler;
  51
  52                 public SessionWrapperHandler (IHttpHandler handler)
  53                 {
  54                         this.handler = handler;
  55                 }
  56
  57                 public bool IsReusable {
  58                         get { return handler.IsReusable; }
  59                 }
  60
  61                 public void ProcessRequest (HttpContext context)
  62                 {
  63                         handler.ProcessRequest (context);
  64                 }
  65         }
  66
  67         class ReadOnlySessionWrapperHandler : IHttpHandler, IRequiresSessionState, IReadOnlySessionState
  68         {
  69                 IHttpHandler handler;
  70
  71                 public ReadOnlySessionWrapperHandler (IHttpHandler handler)
  72                 {
  73                         this.handler = handler;
  74                 }
  75
  76                 public bool IsReusable {
  77                         get { return handler.IsReusable; }
  78                 }
  79
  80                 public void ProcessRequest (HttpContext context)
  81                 {
  82                         handler.ProcessRequest (context);
  83                 }
  84         }
  85         public class WebServiceHandlerFactory : IHttpHandlerFactory
  86         {
  87
  88                 #region Constructors
  89
  90                 public WebServiceHandlerFactory ()
  91                 {
  92                 }
  93
  94                 #endregion // Constructors
  95
  96                 #region Methods
  97
  98                 public IHttpHandler GetHandler (HttpContext context, string verb, string url, string filePath)
  99                 {
 100                         string fp = filePath != null ? filePath.Replace (HttpRuntime.AppDomainAppPath, "/").Replace (Path.DirectorySeparatorChar, '/') : null;
 101
 102                         Type type;
 103                         type = BuildManager.GetCompiledType (url);
 104
 105                         WSProtocol protocol = GuessProtocol (context, verb);
 106                         context.Items ["WebServiceSoapVersion"] =
 107                                 protocol == WSProtocol.HttpSoap12 ?
 108                                 SoapProtocolVersion.Soap12 :
 109                                 SoapProtocolVersion.Default;
 110                         bool supported = false;
 111                         IHttpHandler handler = null;
 112
 113                         supported = WSConfig.IsSupported (protocol);
 114                         if (!supported) {
 115                                 switch (protocol) {
 116                                         default:
 117                                                 if (((protocol & WSProtocol.AnyHttpSoap) != WSProtocol.Unknown) &&
 118                                                         (WSConfig.Current.EnabledProtocols & WSProtocol.AnyHttpSoap) != WSProtocol.Unknown)
 119                                                         throw new InvalidOperationException ("Possible SOAP version mismatch.");
 120                                                 break;
 121                                         case WSProtocol.HttpPost:
 122                                                 if (WSConfig.IsSupported (WSProtocol.HttpPostLocalhost)) {
 123                                                         supported = context.Request.IsLocal;
 124                                                 }
 125                                                 break;
 126                                 }
 127                         }
 128                         if (!supported)
 129                                 throw new InvalidOperationException ("Unsupported request format.");
 130
 131                         switch (protocol) {
 132                         case WSProtocol.HttpSoap12:
 133                         case WSProtocol.HttpSoap:
 134                                 handler = GetTypeHandler (context, new HttpSoapWebServiceHandler (type));
 135                                 break;
 136                         case WSProtocol.HttpPost:
 137                         case WSProtocol.HttpGet:
 138                                 handler = GetTypeHandler (context, new HttpSimpleWebServiceHandler (type, protocol.ToString ()));
 139                                 break;
 140                         case WSProtocol.Documentation:
 141                                 SoapDocumentationHandler soapHandler;
 142                                 soapHandler = new SoapDocumentationHandler (type, context);
 143                                 if (soapHandler.PageHandler is IRequiresSessionState) {
 144                                         if (soapHandler.PageHandler is IReadOnlySessionState)
 145                                                 handler = new ReadOnlySessionWrapperHandler (soapHandler);
 146                                         else
 147                                                 handler = new SessionWrapperHandler (soapHandler);
 148                                 } else {
 149                                         handler = soapHandler;
 150                                 }
 151                                 break;
 152                         }
 153
 154                         return handler;
 155                 }
 156
 157                 IHttpHandler GetTypeHandler (HttpContext context, WebServiceHandler handler)
 158                 {
 159                         MethodStubInfo method = handler.GetRequestMethod (context);
 160                         if (method == null) return null;
 161
 162                         int cache_duration = method.MethodInfo.CacheDuration;
 163                         if (cache_duration > 0)
 164                                 context.Response.ExpiresAbsolute = DateTime.Now.AddSeconds (cache_duration);
 165                         if (method.MethodInfo.EnableSession)
 166                                 return new SessionWrapperHandler (handler);
 167                         else
 168                                 return handler;
 169                 }
 170
 171                 static WSProtocol GuessProtocol (HttpContext context, string verb)
 172                 {
 173                         if (context.Request.PathInfo == null || context.Request.PathInfo == "")
 174                         {
 175                                 if (context.Request.RequestType == "GET")
 176                                         return WSProtocol.Documentation;
 177                                 else
 178                                         return context.Request.Headers ["SOAPAction"] != null ?
 179                                                 WSProtocol.HttpSoap : WSProtocol.HttpSoap12;
 180                         }
 181                         else
 182                         {
 183                                 if (context.Request.RequestType == "GET")
 184                                         return WSProtocol.HttpGet;
 185                                 else
 186                                         return WSProtocol.HttpPost;
 187                         }
 188                 }
 189
 190                 public void ReleaseHandler (IHttpHandler handler)
 191                 {
 192                 }
 193
 194                 #endregion // Methods
 195         }
 196 }