class/System.Web.Services/System.Web.Services.Protocols/SoapExtension.cs

   1 //
   2 // System.Web.Services.Protocols.SoapExtension.cs
   3 //
   4 // Author:
   5 //   Tim Coleman (tim@timcoleman.com)
   6 //
   7 // Copyright (C) Tim Coleman, 2002
   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.IO;
  32 using System.Collections;
  33 using System.Web.Services.Configuration;
  34
  35 namespace System.Web.Services.Protocols {
  36         public abstract class SoapExtension {
  37
  38                 #region Fields
  39
  40                 Stream stream;
  41
  42                 #endregion
  43
  44                 #region Constructors
  45
  46                 protected SoapExtension ()
  47                 {
  48                 }
  49
  50                 #endregion // Constructors
  51
  52                 #region Methods
  53
  54                 public virtual Stream ChainStream (Stream stream)
  55                 {
  56                         return stream;
  57                 }
  58
  59                 public abstract object GetInitializer (Type serviceType);
  60                 public abstract object GetInitializer (LogicalMethodInfo methodInfo, SoapExtensionAttribute attribute);
  61                 public abstract void Initialize (object initializer);
  62                 public abstract void ProcessMessage (SoapMessage message);
  63
  64
  65 #if !TARGET_JVM
  66                 static ArrayList[] globalExtensions;
  67 #else
  68                 static ArrayList[] globalExtensions {
  69                         get {
  70                                 return (ArrayList[])AppDomain.CurrentDomain.GetData("SoapExtension.globalExtensions");
  71                         }
  72                         set {
  73                                 AppDomain.CurrentDomain.SetData("SoapExtension.globalExtensions", value);
  74                         }
  75                 }
  76 #endif
  77
  78                 internal static SoapExtension[] CreateExtensionChain (SoapExtensionRuntimeConfig[] extensionConfigs)
  79                 {
  80                         if (extensionConfigs == null) return null;
  81                         SoapExtension[] res = new SoapExtension [extensionConfigs.Length];
  82                         CreateExtensionChain (extensionConfigs, res, 0);
  83                         return res;
  84                 }
  85
  86                 internal static SoapExtension[] CreateExtensionChain (SoapExtensionRuntimeConfig[] hiPrioExts, SoapExtensionRuntimeConfig[] medPrioExts, SoapExtensionRuntimeConfig[] lowPrioExts)
  87                 {
  88                         int len = 0;
  89                         if (hiPrioExts != null) len += hiPrioExts.Length;
  90                         if (medPrioExts != null) len += medPrioExts.Length;
  91                         if (lowPrioExts != null) len += lowPrioExts.Length;
  92                         if (len == 0) return null;
  93
  94                         SoapExtension[] res = new SoapExtension [len];
  95                         int pos = 0;
  96                         if (hiPrioExts != null) pos = CreateExtensionChain (hiPrioExts, res, pos);
  97                         if (medPrioExts != null) pos = CreateExtensionChain (medPrioExts, res, pos);
  98                         if (lowPrioExts != null) pos = CreateExtensionChain (lowPrioExts, res, pos);
  99                         return res;
 100                 }
 101
 102                 static int CreateExtensionChain (SoapExtensionRuntimeConfig[] extensionConfigs, SoapExtension[] destArray, int pos)
 103                 {
 104                         for (int n=0; n<extensionConfigs.Length; n++)
 105                         {
 106                                 SoapExtensionRuntimeConfig econf = extensionConfigs [n];
 107                                 SoapExtension ext = (SoapExtension) Activator.CreateInstance (econf.Type);
 108                                 ext.Initialize (econf.InitializationInfo);
 109                                 destArray [pos++] = ext;
 110                         }
 111                         return pos;
 112                 }
 113
 114 #if !MONOTOUCH
 115                 static void InitializeGlobalExtensions ()
 116                 {
 117                         globalExtensions = new ArrayList[2];
 118 #if NET_2_0
 119                         if (WebServicesSection.Current == null) return;
 120
 121                         SoapExtensionTypeElementCollection exts = WebServicesSection.Current.SoapExtensionTypes;
 122 #else
 123                         ArrayList exts = WSConfig.Instance.ExtensionTypes;
 124 #endif
 125                         if (exts == null) return;
 126
 127 #if NET_2_0
 128                         foreach (SoapExtensionTypeElement econf in exts)
 129 #else
 130                         foreach (WSExtensionConfig econf in exts)
 131 #endif
 132                         {
 133                                 if (globalExtensions [(int)econf.Group] == null) globalExtensions [(int)econf.Group] = new ArrayList ();
 134                                 ArrayList destList = globalExtensions [(int) econf.Group];
 135                                 bool added = false;
 136                                 for (int n=0; n<destList.Count && !added; n++)
 137 #if NET_2_0
 138                                         if (((SoapExtensionTypeElement)destList [n]).Priority > econf.Priority) {
 139 #else
 140                                         if (((WSExtensionConfig)destList [n]).Priority > econf.Priority) {
 141 #endif
 142                                                 destList.Insert (n, econf);
 143                                                 added = true;
 144                                         }
 145                                 if (!added) destList.Add (econf);
 146                         }
 147                 }
 148
 149                 internal static SoapExtensionRuntimeConfig[][] GetTypeExtensions (Type serviceType)
 150                 {
 151                         if (globalExtensions == null) InitializeGlobalExtensions();
 152
 153                         SoapExtensionRuntimeConfig[][] exts = new SoapExtensionRuntimeConfig[2][];
 154
 155                         for (int group = 0; group < 2; group++)
 156                         {
 157                                 ArrayList globList = globalExtensions[group];
 158                                 if (globList == null) continue;
 159                                 exts [group] = new SoapExtensionRuntimeConfig [globList.Count];
 160                                 for (int n=0; n<globList.Count; n++)
 161                                 {
 162 #if NET_2_0
 163                                         SoapExtensionTypeElement econf = (SoapExtensionTypeElement) globList [n];
 164 #else
 165                                         WSExtensionConfig econf = (WSExtensionConfig) globList [n];
 166 #endif
 167                                         SoapExtensionRuntimeConfig typeconf = new SoapExtensionRuntimeConfig ();
 168                                         typeconf.Type = econf.Type;
 169                                         SoapExtension ext = (SoapExtension) Activator.CreateInstance (econf.Type);
 170                                         typeconf.InitializationInfo = ext.GetInitializer (serviceType);
 171                                         exts [group][n] = typeconf;
 172                                 }
 173                         }
 174                         return exts;
 175                 }
 176 #endif
 177
 178                 internal static SoapExtensionRuntimeConfig[] GetMethodExtensions (LogicalMethodInfo method)
 179                 {
 180                         object[] ats = method.GetCustomAttributes (typeof (SoapExtensionAttribute));
 181                         SoapExtensionRuntimeConfig[] exts = new SoapExtensionRuntimeConfig [ats.Length];
 182                         int[] priorities = new int[ats.Length];
 183
 184                         for (int n=0; n<ats.Length; n++)
 185                         {
 186                                 SoapExtensionAttribute at = (SoapExtensionAttribute) ats[n];
 187                                 SoapExtensionRuntimeConfig econf = new SoapExtensionRuntimeConfig ();
 188                                 econf.Type = at.ExtensionType;
 189                                 priorities [n] = at.Priority;
 190                                 SoapExtension ext = (SoapExtension) Activator.CreateInstance (econf.Type);
 191                                 econf.InitializationInfo = ext.GetInitializer (method, at);
 192                                 exts [n] = econf;
 193                         }
 194                         Array.Sort (priorities, exts);
 195                         return exts;
 196                 }
 197
 198                 internal static Stream ExecuteChainStream (SoapExtension[] extensions, Stream stream)
 199                 {
 200                         if (extensions == null) return stream;
 201
 202                         Stream newStream = stream;
 203                         foreach (SoapExtension ext in extensions)
 204                                 newStream = ext.ChainStream (newStream);
 205                         return newStream;
 206                 }
 207
 208                 internal static void ExecuteProcessMessage(SoapExtension[] extensions, SoapMessage message, Stream stream, bool inverseOrder)
 209                 {
 210                         if (extensions == null) return;
 211
 212                         message.InternalStream = stream;
 213
 214                         if (inverseOrder)
 215                         {
 216                                 for (int n = extensions.Length-1; n >= 0; n--)
 217                                         extensions[n].ProcessMessage (message);
 218                         }
 219                         else
 220                         {
 221                                 for (int n = 0; n < extensions.Length; n++)
 222                                         extensions[n].ProcessMessage (message);
 223                         }
 224                 }
 225
 226                 #endregion // Methods
 227         }
 228
 229         internal class SoapExtensionRuntimeConfig
 230         {
 231                 public Type Type;
 232                 public int Priority;
 233                 public object InitializationInfo;
 234         }
 235 }