mcs/class/System/System.Net/WebProxy.cs

   1 //
   2 // System.Net.WebProxy.cs
   3 //
   4 // Authors:
   5 //   Lawrence Pit (loz@cable.a2000.nl)
   6 //   Andreas Nahr (ClassDevelopment@A-SoftTech.com)
   7 //
   8
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29
  30 using System;
  31 using System.Collections;
  32 using System.Globalization;
  33 using System.Runtime.Serialization;
  34 using System.Text.RegularExpressions;
  35
  36 namespace System.Net
  37 {
  38         [Serializable]
  39         public class WebProxy : IWebProxy, ISerializable
  40         {
  41                 Uri address;
  42                 bool bypassOnLocal;
  43                 ArrayList bypassList;
  44                 ICredentials credentials;
  45 #if NET_2_0
  46                 bool useDefaultCredentials;
  47 #endif
  48
  49                 // Constructors
  50
  51                 public WebProxy ()
  52                         : this ((Uri) null, false, null, null) {}
  53
  54                 public WebProxy (string address)
  55                         : this (ToUri (address), false, null, null) {}
  56
  57                 public WebProxy (Uri address)
  58                         : this (address, false, null, null) {}
  59
  60                 public WebProxy (string address, bool bypassOnLocal)
  61                         : this (ToUri (address), bypassOnLocal, null, null) {}
  62
  63                 public WebProxy (string host, int port)
  64                         : this (new Uri ("http://" + host + ":" + port)) {}
  65
  66                 public WebProxy (Uri address, bool bypassOnLocal)
  67                         : this (address, bypassOnLocal, null, null) {}
  68
  69                 public WebProxy (string address, bool bypassOnLocal, string [] bypassList)
  70                         : this (ToUri (address), bypassOnLocal, bypassList, null) {}
  71
  72                 public WebProxy (Uri address, bool bypassOnLocal, string [] bypassList)
  73                         : this (address, bypassOnLocal, bypassList, null) {}
  74
  75                 public WebProxy (string address, bool bypassOnLocal, string [] bypassList,
  76                                 ICredentials credentials)
  77                         : this (ToUri (address), bypassOnLocal, bypassList, credentials) {}
  78
  79                 public WebProxy (Uri address, bool bypassOnLocal,
  80                                  string[] bypassList, ICredentials credentials)
  81                 {
  82                         this.address = address;
  83                         this.bypassOnLocal = bypassOnLocal;
  84                         if (bypassList != null)
  85                                 this.bypassList = new ArrayList (bypassList);
  86                         this.credentials = credentials;
  87                         CheckBypassList ();
  88                 }
  89
  90                 protected WebProxy (SerializationInfo serializationInfo, StreamingContext streamingContext)
  91                 {
  92                         this.address = (Uri) serializationInfo.GetValue ("_ProxyAddress", typeof (Uri));
  93                         this.bypassOnLocal = serializationInfo.GetBoolean ("_BypassOnLocal");
  94                         this.bypassList = (ArrayList) serializationInfo.GetValue ("_BypassList", typeof (ArrayList));
  95 #if NET_2_0
  96                         this.useDefaultCredentials =  serializationInfo.GetBoolean ("_UseDefaultCredentials");
  97 #endif
  98                         this.credentials = null;
  99                         CheckBypassList ();
 100                 }
 101
 102                 // Properties
 103                 public Uri Address {
 104                         get { return address; }
 105                         set { address = value; }
 106                 }
 107
 108                 public ArrayList BypassArrayList {
 109                         get {
 110                                 if (bypassList == null)
 111                                         bypassList = new ArrayList ();
 112                                 return bypassList;
 113                         }
 114                 }
 115
 116                 public string [] BypassList {
 117                         get { return (string []) BypassArrayList.ToArray (typeof (string)); }
 118                         set {
 119                                 if (value == null)
 120                                         throw new ArgumentNullException ();
 121                                 bypassList = new ArrayList (value);
 122                                 CheckBypassList ();
 123                         }
 124                 }
 125
 126                 public bool BypassProxyOnLocal {
 127                         get { return bypassOnLocal; }
 128                         set { bypassOnLocal = value; }
 129                 }
 130
 131                 public ICredentials Credentials {
 132                         get { return credentials; }
 133                         set { credentials = value; }
 134                 }
 135
 136 #if NET_2_0
 137                 [MonoTODO ("Does not affect Credentials, since CredentialCache.DefaultCredentials is not implemented.")]
 138                 public bool UseDefaultCredentials {
 139                         get { return useDefaultCredentials; }
 140                         set { useDefaultCredentials = value; }
 141                 }
 142 #endif
 143
 144                 // Methods
 145                 [MonoTODO("Can we get this info under windows from the system?")]
 146                 public static WebProxy GetDefaultProxy ()
 147                 {
 148                         // Select gets a WebProxy from config files, if available.
 149                         IWebProxy p = GlobalProxySelection.Select;
 150                         if (p is WebProxy)
 151                                 return (WebProxy) p;
 152
 153                         return new WebProxy ();
 154                 }
 155
 156                 public Uri GetProxy (Uri destination)
 157                 {
 158                         if (IsBypassed (destination))
 159                                 return destination;
 160
 161                         return address;
 162                 }
 163
 164                 public bool IsBypassed (Uri host)
 165                 {
 166 #if NET_2_0
 167                         if (host == null)
 168                                 throw new ArgumentNullException ("host");
 169 #endif
 170
 171                         if (bypassOnLocal && host.IsLoopback)
 172                                 return true;
 173
 174                         string server = host.Host;
 175                         if (bypassOnLocal && server.IndexOf ('.') == -1)
 176                                 return true;
 177
 178                         // LAMESPEC
 179                         if (!bypassOnLocal) {
 180                                 if (String.Compare (server, "localhost", true, CultureInfo.InvariantCulture) == 0)
 181                                         return true;
 182                                 if (String.Compare (server, "loopback", true, CultureInfo.InvariantCulture) == 0)
 183                                         return true;
 184
 185                                 try {
 186                                         IPAddress addr = IPAddress.Parse (server);
 187                                         if (IPAddress.IsLoopback (addr))
 188                                                 return true;
 189                                 } catch {}
 190                         }
 191
 192                         if (bypassList == null)
 193                                 return false;
 194
 195                         try {
 196                                 string hostStr = host.Scheme + "://" + host.Authority;
 197                                 int i = 0;
 198                                 for (; i < bypassList.Count; i++) {
 199                                         Regex regex = new Regex ((string) bypassList [i],
 200                                                 // TODO: RegexOptions.Compiled |  // not implemented yet by Regex
 201                                                 RegexOptions.IgnoreCase |
 202                                                 RegexOptions.Singleline);
 203
 204                                         if (regex.IsMatch (hostStr))
 205                                                 break;
 206                                 }
 207
 208                                 if (i == bypassList.Count)
 209                                         return false;
 210
 211                                 // continue checking correctness of regular expressions..
 212                                 // will throw expression when an invalid one is found
 213                                 for (; i < bypassList.Count; i++)
 214                                         new Regex ((string) bypassList [i]);
 215
 216                                 return true;
 217                         } catch (ArgumentException) {
 218                                 return false;
 219                         }
 220                 }
 221
 222                 void ISerializable.GetObjectData (SerializationInfo serializationInfo,
 223                                                   StreamingContext streamingContext)
 224                 {
 225                         serializationInfo.AddValue ("_BypassOnLocal", bypassOnLocal);
 226                         serializationInfo.AddValue ("_ProxyAddress", address);
 227                         serializationInfo.AddValue ("_BypassList", bypassList);
 228 #if NET_2_0
 229                         serializationInfo.AddValue ("_UseDefaultCredentials", UseDefaultCredentials);
 230 #endif
 231                 }
 232
 233                 // Private Methods
 234                 // this compiles the regular expressions, and will throw
 235                 // an exception when an invalid one is found.
 236                 void CheckBypassList ()
 237                 {
 238                         if (bypassList == null)
 239                                 return;
 240                         for (int i = 0; i < bypassList.Count; i++)
 241                                 new Regex ((string) bypassList [i]);
 242                 }
 243
 244                 static Uri ToUri (string address)
 245                 {
 246                         if (address == null)
 247                                 return null;
 248
 249                         if (address.IndexOf ("://") == -1)
 250                                 address = "http://" + address;
 251
 252                         return new Uri (address);
 253                 }
 254         }
 255 }