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 #if NET_2_0
  44 using WSConfig = System.Web.Services.Configuration.WebServicesSection;
  45 using WSProtocol = System.Web.Services.Configuration.WebServiceProtocols;
  46 #endif
  47
  48 namespace System.Web.Services.Protocols
  49 {
  50         class SessionWrapperHandler : IHttpHandler, IRequiresSessionState
  51         {
  52                 IHttpHandler handler;
  53
  54                 public SessionWrapperHandler (IHttpHandler handler)
  55                 {
  56                         this.handler = handler;
  57                 }
  58
  59                 public bool IsReusable {
  60                         get { return handler.IsReusable; }
  61                 }
  62
  63                 public void ProcessRequest (HttpContext context)
  64                 {
  65                         handler.ProcessRequest (context);
  66                 }
  67         }
  68
  69         class ReadOnlySessionWrapperHandler : IHttpHandler, IRequiresSessionState, IReadOnlySessionState
  70         {
  71                 IHttpHandler handler;
  72
  73                 public ReadOnlySessionWrapperHandler (IHttpHandler handler)
  74                 {
  75                         this.handler = handler;
  76                 }
  77
  78                 public bool IsReusable {
  79                         get { return handler.IsReusable; }
  80                 }
  81
  82                 public void ProcessRequest (HttpContext context)
  83                 {
  84                         handler.ProcessRequest (context);
  85                 }
  86         }
  87         public class WebServiceHandlerFactory : IHttpHandlerFactory
  88         {
  89
  90                 #region Constructors
  91
  92                 public WebServiceHandlerFactory ()
  93                 {
  94                 }
  95
  96                 #endregion // Constructors
  97
  98                 #region Methods
  99
 100                 public IHttpHandler GetHandler (HttpContext context, string verb, string url, string filePath)
 101                 {
 102 #if TARGET_J2EE
 103                         string fp = url;
 104 #else
 105                         string fp = filePath != null ? filePath.Replace (HttpRuntime.AppDomainAppPath, "/").Replace (Path.DirectorySeparatorChar, '/') : null;
 106 #endif
 107
 108                         Type type;
 109 #if NET_2_0 && !TARGET_JVM
 110                         type = BuildManager.GetCompiledType (url);
 111 #else
 112                         type = WebServiceParser.GetCompiledType (fp, context);
 113 #endif
 114
 115                         WSProtocol protocol = GuessProtocol (context, verb);
 116 #if NET_2_0
 117                         context.Items ["WebServiceSoapVersion"] =
 118                                 protocol == WSProtocol.HttpSoap12 ?
 119                                 SoapProtocolVersion.Soap12 :
 120                                 SoapProtocolVersion.Default;
 121 #endif
 122                         bool supported = false;
 123                         IHttpHandler handler = null;
 124
 125                         supported = WSConfig.IsSupported (protocol);
 126                         if (!supported) {
 127                                 switch (protocol) {
 128 #if NET_2_0
 129                                         default:
 130                                                 if (((protocol & WSProtocol.AnyHttpSoap) != WSProtocol.Unknown) &&
 131                                                         (WSConfig.Current.EnabledProtocols & WSProtocol.AnyHttpSoap) != WSProtocol.Unknown)
 132                                                         throw new InvalidOperationException ("Possible SOAP version mismatch.");
 133                                                 break;
 134 #endif
 135                                         case WSProtocol.HttpPost:
 136                                                 if (WSConfig.IsSupported (WSProtocol.HttpPostLocalhost)) {
 137 #if NET_2_0
 138                                                         supported = context.Request.IsLocal;
 139 #else
 140                                                         string localAddr = context.Request.ServerVariables ["LOCAL_ADDR"];
 141
 142                                                         supported = localAddr != null &&
 143                                                                 (localAddr == context.Request.ServerVariables ["REMOTE_ADDR"] ||
 144                                                                 IPAddress.IsLoopback (IPAddress.Parse (localAddr)));
 145 #endif
 146                                                 }
 147                                                 break;
 148                                 }
 149                         }
 150                         if (!supported)
 151                                 throw new InvalidOperationException ("Unsupported request format.");
 152
 153                         switch (protocol) {
 154                         case WSProtocol.HttpSoap12:
 155                         case WSProtocol.HttpSoap:
 156                                 handler = GetTypeHandler (context, new HttpSoapWebServiceHandler (type));
 157                                 break;
 158                         case WSProtocol.HttpPost:
 159                         case WSProtocol.HttpGet:
 160                                 handler = GetTypeHandler (context, new HttpSimpleWebServiceHandler (type, protocol.ToString ()));
 161                                 break;
 162                         case WSProtocol.Documentation:
 163                                 SoapDocumentationHandler soapHandler;
 164                                 soapHandler = new SoapDocumentationHandler (type, context);
 165                                 if (soapHandler.PageHandler is IRequiresSessionState) {
 166                                         if (soapHandler.PageHandler is IReadOnlySessionState)
 167                                                 handler = new ReadOnlySessionWrapperHandler (soapHandler);
 168                                         else
 169                                                 handler = new SessionWrapperHandler (soapHandler);
 170                                 } else {
 171                                         handler = soapHandler;
 172                                 }
 173                                 break;
 174                         }
 175
 176                         return handler;
 177                 }
 178
 179                 IHttpHandler GetTypeHandler (HttpContext context, WebServiceHandler handler)
 180                 {
 181                         MethodStubInfo method = handler.GetRequestMethod (context);
 182                         if (method == null) return null;
 183
 184                         int cache_duration = method.MethodInfo.CacheDuration;
 185                         if (cache_duration > 0)
 186                                 context.Response.ExpiresAbsolute = DateTime.Now.AddSeconds (cache_duration);
 187                         if (method.MethodInfo.EnableSession)
 188                                 return new SessionWrapperHandler (handler);
 189                         else
 190                                 return handler;
 191                 }
 192
 193                 static WSProtocol GuessProtocol (HttpContext context, string verb)
 194                 {
 195                         if (context.Request.PathInfo == null || context.Request.PathInfo == "")
 196                         {
 197                                 if (context.Request.RequestType == "GET")
 198                                         return WSProtocol.Documentation;
 199                                 else
 200 #if NET_2_0
 201                                         return context.Request.Headers ["SOAPAction"] != null ?
 202                                                 WSProtocol.HttpSoap : WSProtocol.HttpSoap12;
 203 #else
 204                                         return WSProtocol.HttpSoap;
 205 #endif
 206                         }
 207                         else
 208                         {
 209                                 if (context.Request.RequestType == "GET")
 210                                         return WSProtocol.HttpGet;
 211                                 else
 212                                         return WSProtocol.HttpPost;
 213                         }
 214                 }
 215
 216                 public void ReleaseHandler (IHttpHandler handler)
 217                 {
 218                 }
 219
 220                 #endregion // Methods
 221         }
 222 }