mcs/class/System/System.Net/WebRequest.cs

   1 //
   2 // System.Net.WebRequest
   3 //
   4 // Authors:
   5 //   Lawrence Pit (loz@cable.a2000.nl)
   6 //
   7
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System;
  30 using System.Collections;
  31 using System.Collections.Specialized;
  32 using System.Configuration;
  33 using System.IO;
  34 using System.Runtime.Serialization;
  35
  36 namespace System.Net
  37 {
  38         [Serializable]
  39         public abstract class WebRequest : MarshalByRefObject, ISerializable
  40         {
  41                 static HybridDictionary prefixes = new HybridDictionary ();
  42
  43                 // Constructors
  44
  45                 static WebRequest ()
  46                 {
  47                         ConfigurationSettings.GetConfig ("system.net/webRequestModules");
  48                 }
  49
  50                 protected WebRequest () { }
  51
  52                 protected WebRequest (SerializationInfo serializationInfo, StreamingContext streamingContext)
  53                 {
  54                         throw new NotSupportedException ();
  55                 }
  56
  57                 // Properties
  58
  59                 public virtual string ConnectionGroupName {
  60                         get { throw new NotSupportedException (); }
  61                         set { throw new NotSupportedException (); }
  62                 }
  63
  64                 public virtual long ContentLength {
  65                         get { throw new NotSupportedException (); }
  66                         set { throw new NotSupportedException (); }
  67                 }
  68
  69                 public virtual string ContentType {
  70                         get { throw new NotSupportedException (); }
  71                         set { throw new NotSupportedException (); }
  72                 }
  73
  74                 public virtual ICredentials Credentials {
  75                         get { throw new NotSupportedException (); }
  76                         set { throw new NotSupportedException (); }
  77                 }
  78
  79                 public virtual WebHeaderCollection Headers {
  80                         get { throw new NotSupportedException (); }
  81                         set { throw new NotSupportedException (); }
  82                 }
  83
  84                 public virtual string Method {
  85                         get { throw new NotSupportedException (); }
  86                         set { throw new NotSupportedException (); }
  87                 }
  88
  89                 public virtual bool PreAuthenticate {
  90                         get { throw new NotSupportedException (); }
  91                         set { throw new NotSupportedException (); }
  92                 }
  93
  94                 public virtual IWebProxy Proxy {
  95                         get { throw new NotSupportedException (); }
  96                         set { throw new NotSupportedException (); }
  97                 }
  98
  99                 public virtual Uri RequestUri {
 100                         get { throw new NotSupportedException (); }
 101                 }
 102
 103                 public virtual int Timeout {
 104                         get { throw new NotSupportedException (); }
 105                         set { throw new NotSupportedException (); }
 106                 }
 107
 108                 // Methods
 109
 110                 public virtual void Abort()
 111                 {
 112                         throw new NotSupportedException ();
 113                 }
 114
 115                 public virtual IAsyncResult BeginGetRequestStream (AsyncCallback callback, object state)
 116                 {
 117                         throw new NotSupportedException ();
 118                 }
 119
 120                 public virtual IAsyncResult BeginGetResponse (AsyncCallback callback, object state)
 121                 {
 122                         throw new NotSupportedException ();
 123                 }
 124
 125                 public static WebRequest Create (string requestUriString)
 126                 {
 127                         if (requestUriString == null)
 128                                 throw new ArgumentNullException ("requestUriString");
 129                         return Create (new Uri (requestUriString));
 130                 }
 131
 132                 public static WebRequest Create (Uri requestUri)
 133                 {
 134                         if (requestUri == null)
 135                                 throw new ArgumentNullException ("requestUri");
 136                         return GetCreator (requestUri.AbsoluteUri).Create (requestUri);
 137                 }
 138
 139                 public static WebRequest CreateDefault (Uri requestUri)
 140                 {
 141                         if (requestUri == null)
 142                                 throw new ArgumentNullException ("requestUri");
 143                         return GetCreator (requestUri.Scheme).Create (requestUri);
 144                 }
 145
 146                 public virtual Stream EndGetRequestStream (IAsyncResult asyncResult)
 147                 {
 148                         throw new NotSupportedException ();
 149                 }
 150
 151                 public virtual WebResponse EndGetResponse (IAsyncResult asyncResult)
 152                 {
 153                         throw new NotSupportedException ();
 154                 }
 155
 156                 public virtual Stream GetRequestStream()
 157                 {
 158                         throw new NotSupportedException ();
 159                 }
 160
 161                 public virtual WebResponse GetResponse()
 162                 {
 163                         throw new NotSupportedException ();
 164                 }
 165
 166                 void ISerializable.GetObjectData (SerializationInfo serializationInfo,
 167                                                   StreamingContext streamingContext)
 168                 {
 169                         throw new NotSupportedException ();
 170                 }
 171
 172                 public static bool RegisterPrefix (string prefix, IWebRequestCreate creator)
 173                 {
 174                         if (prefix == null)
 175                                 throw new ArgumentNullException("prefix");
 176                         if (creator == null)
 177                                 throw new ArgumentNullException("creator");
 178
 179                         lock (prefixes.SyncRoot) {
 180                                 string lowerCasePrefix = prefix.ToLower ();
 181                                 if (prefixes.Contains (lowerCasePrefix))
 182                                         return false;
 183                                 prefixes.Add (lowerCasePrefix, creator);
 184                         }
 185                         return true;
 186                 }
 187
 188                 private static IWebRequestCreate GetCreator (string prefix)
 189                 {
 190                         int longestPrefix = -1;
 191                         IWebRequestCreate creator = null;
 192
 193                         prefix = prefix.ToLower ();
 194
 195                         IDictionaryEnumerator e = prefixes.GetEnumerator ();
 196                         while (e.MoveNext ()) {
 197                                 string key = e.Key as string;
 198
 199                                 if (key.Length <= longestPrefix)
 200                                         continue;
 201
 202                                 if (!prefix.StartsWith (key))
 203                                         continue;
 204
 205                                 longestPrefix = key.Length;
 206                                 creator = (IWebRequestCreate) e.Value;
 207                         }
 208
 209                         if (creator == null)
 210                                 throw new NotSupportedException (prefix);
 211
 212                         return creator;
 213                 }
 214
 215                 internal static void ClearPrefixes ()
 216                 {
 217                         prefixes.Clear ();
 218                 }
 219
 220                 internal static void RemovePrefix (string prefix)
 221                 {
 222                         prefixes.Remove (prefix);
 223                 }
 224
 225                 internal static void AddPrefix (string prefix, string typeName)
 226                 {
 227                         Type type = Type.GetType (typeName);
 228                         if (type == null)
 229                                 throw new ConfigurationException (String.Format ("Type {0} not found", typeName));
 230
 231                         object o = Activator.CreateInstance (type, true);
 232                         prefixes [prefix] = o;
 233                 }
 234         }
 235 }
 236