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

   1 //
   2 // System.Web.Services.Protocols.HttpSimpleWebServiceHandler.cs
   3 //
   4 // Author:
   5 //   Lluis Sanchez Gual (lluis@ximian.com)
   6 //
   7 // Copyright (C) Ximian, Inc. 2003
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System;
  32 using System.Reflection;
  33 using System.IO;
  34 using System.Web.Services;
  35
  36 namespace System.Web.Services.Protocols
  37 {
  38         internal class HttpSimpleWebServiceHandler: WebServiceHandler
  39         {
  40                 HttpSimpleTypeStubInfo _typeInfo;
  41                 HttpSimpleMethodStubInfo method;
  42
  43                 public HttpSimpleWebServiceHandler (Type type, string protocolName)
  44                 : base (type)
  45                 {
  46                         _typeInfo = (HttpSimpleTypeStubInfo) TypeStubManager.GetTypeStub (type, protocolName);
  47                 }
  48
  49                 protected HttpSimpleTypeStubInfo TypeStub
  50                 {
  51                         get { return _typeInfo; }
  52                 }
  53
  54                 internal override MethodStubInfo GetRequestMethod (HttpContext context)
  55                 {
  56                         string name = context.Request.PathInfo;
  57                         if (name.StartsWith ("/"))
  58                                 name = name.Substring (1);
  59
  60                         method = (HttpSimpleMethodStubInfo) _typeInfo.GetMethod (name);
  61                         if (method == null)
  62                                 WriteError (context, "Method " + name + " not defined in service " + ServiceType.Name);
  63
  64                         return method;
  65                 }
  66
  67                 public override void ProcessRequest (HttpContext context)
  68                 {
  69                         Context = context;
  70                         Stream respStream = null;
  71                         Exception error = null;
  72
  73                         try
  74                         {
  75                                 if (method == null)
  76                                         method = (HttpSimpleMethodStubInfo) GetRequestMethod (context);
  77
  78                                 if (method.MethodInfo.EnableSession)
  79                                         Session = context.Session;
  80
  81                                 MimeParameterReader parameterReader = (MimeParameterReader) method.ParameterReaderType.Create ();
  82                                 object[] parameters = parameterReader.Read (context.Request);
  83
  84                                 MimeReturnWriter returnWriter = (MimeReturnWriter) method.ReturnWriterType.Create ();
  85                                 object result = Invoke (method.MethodInfo, parameters);
  86                                 respStream = context.Response.OutputStream;
  87                                 returnWriter.Write (context.Response, respStream, result);
  88                         }
  89                         catch (Exception ex)
  90                         {
  91                                 error = ex;
  92                         }
  93
  94                         if (error != null)
  95                                 WriteError (context, error.Message);
  96
  97                         if (respStream != null)
  98                                 respStream.Close ();
  99                 }
 100
 101                 void WriteError (HttpContext context, string msg)
 102                 {
 103                         try
 104                         {
 105                                 context.Response.ContentType = "text/plain";
 106                                 context.Response.StatusCode = 500;
 107                                 context.Response.Write (msg);
 108                                 context.Response.End ();
 109                         }
 110                         catch {}
 111                 }
 112
 113                 object Invoke (LogicalMethodInfo method, object[] parameters)
 114                 {
 115                         try
 116                         {
 117                                 object server = CreateServerInstance ();
 118                                 object[] res = method.Invoke (server, parameters);
 119                                 if (!method.IsVoid) return res[0];
 120                                 else return null;
 121                         }
 122                         catch (TargetInvocationException ex)
 123                         {
 124                                 throw ex.InnerException;
 125                         }
 126                 }
 127         }
 128 }