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 using System;
  11 using System.Reflection;
  12 using System.IO;
  13 using System.Web.Services;
  14
  15 namespace System.Web.Services.Protocols
  16 {
  17         internal class HttpSimpleWebServiceHandler: WebServiceHandler
  18         {
  19                 HttpSimpleTypeStubInfo _typeInfo;
  20
  21                 public HttpSimpleWebServiceHandler (Type type, string protocolName): base (type)
  22                 {
  23                         _typeInfo = (HttpSimpleTypeStubInfo) TypeStubManager.GetTypeStub (type, protocolName);
  24                 }
  25
  26                 protected HttpSimpleTypeStubInfo TypeStub
  27                 {
  28                         get { return _typeInfo; }
  29                 }
  30
  31                 public override void ProcessRequest (HttpContext context)
  32                 {
  33                         string name = context.Request.PathInfo;
  34                         if (name.StartsWith ("/")) name = name.Substring (1);
  35
  36                         Stream respStream = null;
  37                         Exception error = null;
  38                         try
  39                         {
  40                                 HttpSimpleMethodStubInfo method = (HttpSimpleMethodStubInfo) _typeInfo.GetMethod (name);
  41                                 if (method == null) throw new InvalidOperationException ("Method " + name + " not defined in service " + ServiceType.Name);
  42
  43                                 MimeParameterReader parameterReader = (MimeParameterReader) method.ParameterReaderType.Create ();
  44                                 object[] parameters = parameterReader.Read (context.Request);
  45
  46                                 MimeReturnWriter returnWriter = (MimeReturnWriter) method.ReturnWriterType.Create ();
  47                                 object result = Invoke (method.MethodInfo, parameters);
  48                                 respStream = context.Response.OutputStream;
  49                                 returnWriter.Write (context.Response, respStream, result);
  50                         }
  51                         catch (Exception ex)
  52                         {
  53                                 error = ex;
  54                         }
  55
  56                         if (error != null)
  57                         {
  58                                 try
  59                                 {
  60                                         context.Response.ContentType = "text/plain";
  61                                         context.Response.StatusCode = 500;
  62                                         context.Response.Write (error.Message);
  63                                 }
  64                                 catch {}
  65                         }
  66
  67                         if (respStream != null)
  68                                 respStream.Close ();
  69                 }
  70
  71                 object Invoke (LogicalMethodInfo method, object[] parameters)
  72                 {
  73                         try
  74                         {
  75                                 object server = CreateServerInstance ();
  76                                 object[] res = method.Invoke (server, parameters);
  77                                 if (!method.IsVoid) return res[0];
  78                                 else return null;
  79                         }
  80                         catch (TargetInvocationException ex)
  81                         {
  82                                 throw ex.InnerException;
  83                         }
  84                 }
  85         }
  86 }