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

   1 //\r
   2 // System.Net.WebRequest\r
   3 //\r
   4 // Author:\r
   5 //   Lawrence Pit (loz@cable.a2000.nl)\r
   6 //\r
   7 \r
   8 using System;\r
   9 using System.Collections;\r
  10 using System.Collections.Specialized;\r
  11 using System.IO;\r
  12 using System.Runtime.Serialization;\r
  13 \r
  14 namespace System.Net \r
  15 {\r
  16         [Serializable]\r
  17         public abstract class WebRequest : MarshalByRefObject, ISerializable\r
  18         {\r
  19                 private static HybridDictionary prefixes;\r
  20                 \r
  21                 static WebRequest () {\r
  22                         prefixes = new HybridDictionary (3, true);\r
  23                         RegisterPrefix ("file", new FileWebRequestCreator ());\r
  24                         RegisterPrefix ("http", new HttpWebRequestCreator ());\r
  25                         RegisterPrefix ("https", new HttpWebRequestCreator ());\r
  26                 }\r
  27                 \r
  28                 internal class HttpWebRequestCreator : IWebRequestCreate\r
  29                 {\r
  30                         internal HttpWebRequestCreator () { }\r
  31                         \r
  32                         public WebRequest Create (Uri uri) \r
  33                         {\r
  34                                 return new HttpWebRequest (uri);\r
  35                         }\r
  36                 }\r
  37 \r
  38                 internal class FileWebRequestCreator : IWebRequestCreate\r
  39                 {\r
  40                         internal FileWebRequestCreator () { }\r
  41                         \r
  42                         public WebRequest Create (Uri uri) \r
  43                         {\r
  44                                 return new FileWebRequest (uri);\r
  45                         }\r
  46                 }\r
  47 \r
  48                 \r
  49                 // Constructors\r
  50                 \r
  51                 protected WebRequest () { }             \r
  52                 \r
  53                 protected WebRequest (SerializationInfo serializationInfo, StreamingContext streamingContext) \r
  54                 {\r
  55                         throw new NotSupportedException ();\r
  56                 }\r
  57                 \r
  58                 // Properties\r
  59                 \r
  60                 public virtual string ConnectionGroupName { \r
  61                         get { throw new NotSupportedException (); }\r
  62                         set { throw new NotSupportedException (); }\r
  63                 }\r
  64                 \r
  65                 public virtual long ContentLength { \r
  66                         get { throw new NotSupportedException (); }\r
  67                         set { throw new NotSupportedException (); }\r
  68                 }\r
  69                 \r
  70                 public virtual string ContentType { \r
  71                         get { throw new NotSupportedException (); }\r
  72                         set { throw new NotSupportedException (); }\r
  73                 }\r
  74                 \r
  75                 public virtual ICredentials Credentials { \r
  76                         get { throw new NotSupportedException (); }\r
  77                         set { throw new NotSupportedException (); }\r
  78                 }\r
  79                 \r
  80                 public virtual WebHeaderCollection Headers { \r
  81                         get { throw new NotSupportedException (); }\r
  82                         set { throw new NotSupportedException (); }\r
  83                 }\r
  84                 \r
  85                 public virtual string Method { \r
  86                         get { throw new NotSupportedException (); }\r
  87                         set { throw new NotSupportedException (); }\r
  88                 }\r
  89                 \r
  90                 public virtual bool PreAuthenticate { \r
  91                         get { throw new NotSupportedException (); }\r
  92                         set { throw new NotSupportedException (); }\r
  93                 }\r
  94                 \r
  95                 public virtual IWebProxy Proxy { \r
  96                         get { throw new NotSupportedException (); }\r
  97                         set { throw new NotSupportedException (); }\r
  98                 }\r
  99                 \r
 100                 public virtual Uri RequestUri { \r
 101                         get { throw new NotSupportedException (); }\r
 102                         set { throw new NotSupportedException (); }\r
 103                 }\r
 104                 \r
 105                 public virtual int Timeout { \r
 106                         get { throw new NotSupportedException (); }\r
 107                         set { throw new NotSupportedException (); }\r
 108                 }\r
 109                 \r
 110                 // Methods\r
 111                 \r
 112                 public virtual void Abort()\r
 113                 {\r
 114                         throw new NotSupportedException ();\r
 115                 }\r
 116                 \r
 117                 public virtual IAsyncResult BeginGetRequestStream (AsyncCallback callback, object state) \r
 118                 {\r
 119                         throw new NotSupportedException ();\r
 120                 }\r
 121                 \r
 122                 public virtual IAsyncResult BeginGetResponse (AsyncCallback callback, object state)\r
 123                 {\r
 124                         throw new NotSupportedException ();\r
 125                 }\r
 126 \r
 127                 public static WebRequest Create (string requestUriString) \r
 128                 {\r
 129                         if (requestUriString == null)\r
 130                                 throw new ArgumentNullException ("requestUriString");\r
 131                         return Create (new Uri (requestUriString));\r
 132                 }\r
 133                                 \r
 134                 public static WebRequest Create (Uri requestUri) \r
 135                 {\r
 136                         if (requestUri == null)\r
 137                                 throw new ArgumentNullException ("requestUri");\r
 138                         return GetCreator (requestUri.AbsoluteUri).Create (requestUri);\r
 139                 }\r
 140                 \r
 141                 public static WebRequest CreateDefault (Uri requestUri)\r
 142                 {\r
 143                         if (requestUri == null)\r
 144                                 throw new ArgumentNullException ("requestUri");\r
 145                         return GetCreator (requestUri.Scheme).Create (requestUri);\r
 146                 }\r
 147 \r
 148                 public virtual Stream EndGetRequestStream (IAsyncResult asyncResult)\r
 149                 {\r
 150                         throw new NotSupportedException ();\r
 151                 }\r
 152                 \r
 153                 public virtual WebResponse EndGetResponse (IAsyncResult asyncResult)\r
 154                 {\r
 155                         throw new NotSupportedException ();\r
 156                 }\r
 157                 \r
 158                 public virtual Stream GetRequestStream()\r
 159                 {\r
 160                         throw new NotSupportedException ();\r
 161                 }\r
 162                 \r
 163                 public virtual WebResponse GetResponse()\r
 164                 {\r
 165                         throw new NotSupportedException ();\r
 166                 }\r
 167                 \r
 168                 void ISerializable.GetObjectData (SerializationInfo serializationInfo,\r
 169                                                   StreamingContext streamingContext)\r
 170                 {\r
 171                         throw new NotSupportedException ();\r
 172                 }\r
 173 \r
 174                 public static bool RegisterPrefix (string prefix, IWebRequestCreate creator)\r
 175                 {\r
 176                         if (prefix == null)\r
 177                                 throw new ArgumentNullException("prefix");\r
 178                         if (creator == null)\r
 179                                 throw new ArgumentNullException("creator");                     \r
 180                         \r
 181                         lock (prefixes.SyncRoot) {\r
 182                                 if (prefixes.Contains (prefix))\r
 183                                         return false;\r
 184                                 prefixes.Add (prefix.ToLower (), creator);\r
 185                         }\r
 186                         return true;\r
 187                 }\r
 188                 \r
 189                 private static IWebRequestCreate GetCreator (string prefix)\r
 190                 {\r
 191                         int longestPrefix = -1;\r
 192                         IWebRequestCreate creator = null;\r
 193 \r
 194                         prefix = prefix.ToLower ();\r
 195 \r
 196                         IDictionaryEnumerator e = prefixes.GetEnumerator ();\r
 197                         while (e.MoveNext ()) {\r
 198                                 string key = e.Key as string;\r
 199 \r
 200                                 if (key.Length <= longestPrefix) \r
 201                                         continue;\r
 202                                 \r
 203                                 if (!prefix.StartsWith (key))\r
 204                                         continue;                                       \r
 205                                         \r
 206                                 longestPrefix = key.Length;\r
 207                                 creator = (IWebRequestCreate) e.Value;\r
 208                         }\r
 209                         \r
 210                         if (creator == null) \r
 211                                 throw new NotSupportedException (prefix);\r
 212                                 \r
 213                         return creator;\r
 214                 }\r
 215         }\r
 216 }