mcs/class/System.Runtime.Remoting/MonoHttp/EndPointListener.cs

   1 #define EMBEDDED_IN_1_0
   2
   3 //
   4 // System.Net.EndPointListener
   5 //
   6 // Author:
   7 //      Gonzalo Paniagua Javier (gonzalo@novell.com)
   8 //
   9 // Copyright (c) 2005 Novell, Inc. (http://www.novell.com)
  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 #if !NET_2_0
  32
  33 using System.IO;
  34 using System.Net.Sockets;
  35 using System.Collections;
  36 using System.Security.Cryptography;
  37 using System.Security.Cryptography.X509Certificates;
  38 using Mono.Security.Authenticode;
  39
  40 using System; using System.Net; namespace MonoHttp {
  41
  42         sealed class EndPointListener : IHttpListenerContextBinder
  43         {
  44                 IPEndPoint endpoint;
  45                 Socket sock;
  46                 Hashtable prefixes;  // Dictionary <ListenerPrefix, HttpListener>
  47                 ArrayList unhandled; // List<ListenerPrefix> unhandled; host = '*'
  48                 ArrayList all;       // List<ListenerPrefix> all;  host = '+'
  49
  50                 AsymmetricAlgorithm key;
  51                 bool secure;
  52
  53                 public EndPointListener (IPAddress addr, int port, bool secure)
  54                 {
  55 #if !EMBEDDED_IN_1_0
  56                         if (secure) {
  57                                 this.secure = secure;
  58                                 LoadCertificateAndKey (addr, port);
  59                         }
  60 #endif
  61
  62                         endpoint = new IPEndPoint (addr, port);
  63                         sock = new Socket (addr.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
  64                         sock.Bind (endpoint);
  65                         sock.Listen (500);
  66                         sock.BeginAccept (OnAccept, this);
  67                         prefixes = new Hashtable ();
  68                 }
  69 #if !EMBEDDED_IN_1_0
  70                 void LoadCertificateAndKey (IPAddress addr, int port)
  71                 {
  72                         // Actually load the certificate
  73                         try {
  74                                 string dirname = Environment.GetFolderPath (Environment.SpecialFolder.ApplicationData);
  75                                 string path = Path.Combine (dirname, ".mono");
  76                                 path = Path.Combine (path, "httplistener");
  77                                 string cert_file = Path.Combine (path, String.Format ("{0}.cer", port));
  78                                 string pvk_file = Path.Combine (path, String.Format ("{0}.pvk", port));
  79                                 cert = new X509Certificate2 (cert_file);
  80                                 key = PrivateKey.CreateFromFile (pvk_file).RSA;
  81                         } catch {
  82                                 // ignore errors
  83                         }
  84                 }
  85 #endif
  86                 static void OnAccept (IAsyncResult ares)
  87                 {
  88                         EndPointListener epl = (EndPointListener) ares.AsyncState;
  89                         Socket accepted = null;
  90                         try {
  91                                 accepted = epl.sock.EndAccept (ares);
  92                         } catch {
  93                                 // Anything to do here?
  94                         } finally {
  95                                 try {
  96                                         epl.sock.BeginAccept (OnAccept, epl);
  97                                 } catch {
  98                                         if (accepted != null) {
  99                                                 try {
 100                                                         accepted.Close ();
 101                                                 } catch {}
 102                                                 accepted = null;
 103                                         }
 104                                 }
 105                         }
 106
 107                         if (accepted == null)
 108                                 return;
 109
 110                         if (epl.secure && (epl.key == null)) {
 111                                 accepted.Close ();
 112                                 return;
 113                         }
 114                         HttpConnection conn = new HttpConnection (accepted, epl);
 115                         conn.BeginReadRequest ();
 116                 }
 117
 118                 public bool BindContext (HttpListenerContext context)
 119                 {
 120                         HttpListenerRequest req = context.Request;
 121                         ListenerPrefix prefix;
 122                         HttpListener listener = SearchListener (req.UserHostName, req.RawUrl, out prefix);
 123                         if (listener == null)
 124                                 return false;
 125
 126                         context.Listener = listener;
 127                         context.Connection.Prefix = prefix;
 128                         listener.RegisterContext (context);
 129                         return true;
 130                 }
 131
 132                 public void UnbindContext (HttpListenerContext context)
 133                 {
 134                         if (context == null || context.Request == null)
 135                                 return;
 136
 137                         HttpListenerRequest req = context.Request;
 138                         ListenerPrefix prefix;
 139                         HttpListener listener = SearchListener (req.UserHostName, req.RawUrl, out prefix);
 140                         if (listener != null)
 141                                 listener.UnregisterContext (context);
 142                 }
 143
 144                 HttpListener SearchListener (string host, string raw_url, out ListenerPrefix prefix)
 145                 {
 146                         prefix = null;
 147                         if (raw_url == null)
 148                                 return null;
 149
 150                         //TODO: We should use a ReaderWriterLock between this and the add/remove operations.
 151                         if (host != null) {
 152                                 int colon = host.IndexOf (':');
 153                                 if (colon >= 0)
 154                                         host = host.Substring (0, colon);
 155                         }
 156
 157                         string path;
 158                         Uri raw_uri;
 159                         #if NET_2_0
 160 if (MonoHttp.Utility.MaybeUri (raw_url) && Uri.TryCreate (raw_url, UriKind.Absolute, out raw_uri))
 161 #else
 162 try { raw_uri = new Uri (raw_url); } catch { raw_uri = null; } if (raw_uri != null)
 163 #endif
 164
 165                                 path = raw_uri.PathAndQuery;
 166                         else
 167                                 path = HttpUtility.UrlDecode (raw_url);
 168
 169                         string path_slash = path [path.Length - 1] == '/' ? path : path + "/";
 170
 171                         HttpListener best_match = null;
 172                         int best_length = -1;
 173
 174                         lock (prefixes) {
 175                                 if (host != null && host != "") {
 176                                         foreach (ListenerPrefix p in prefixes.Keys) {
 177                                                 string ppath = p.Path;
 178                                                 if (ppath.Length < best_length)
 179                                                         continue;
 180
 181                                                 if (p.Host == host && (path.StartsWith (ppath) || path_slash.StartsWith (ppath))) {
 182                                                         best_length = ppath.Length;
 183                                                         best_match = (HttpListener) prefixes [p];
 184                                                         prefix = p;
 185                                                 }
 186                                         }
 187                                         if (best_length != -1)
 188                                                 return best_match;
 189                                 }
 190
 191                                 best_match = MatchFromList (host, path, unhandled, out prefix);
 192                                 if (best_match != null)
 193                                         return best_match;
 194
 195                                 best_match = MatchFromList (host, path, all, out prefix);
 196                                 if (best_match != null)
 197                                         return best_match;
 198                         }
 199                         return null;
 200                 }
 201
 202                 HttpListener MatchFromList (string host, string path, ArrayList list, out ListenerPrefix prefix)
 203                 {
 204                         prefix = null;
 205                         if (list == null)
 206                                 return null;
 207
 208                         HttpListener best_match = null;
 209                         int best_length = -1;
 210
 211                         foreach (ListenerPrefix p in list) {
 212                                 string ppath = p.Path;
 213                                 if (ppath.Length < best_length)
 214                                         continue;
 215
 216                                 if (path.StartsWith (ppath)) {
 217                                         best_length = ppath.Length;
 218                                         best_match = p.Listener;
 219                                         prefix = p;
 220                                 }
 221                         }
 222
 223                         return best_match;
 224                 }
 225
 226                 void AddSpecial (ArrayList coll, ListenerPrefix prefix)
 227                 {
 228                         if (coll == null)
 229                                 return;
 230
 231                         foreach (ListenerPrefix p in coll) {
 232                                 if (p.Path == prefix.Path) //TODO: code
 233                                         throw new HttpListenerException (400, "Prefix already in use.");
 234                         }
 235
 236                         coll.Add (prefix);
 237                 }
 238
 239                 void RemoveSpecial (ArrayList coll, ListenerPrefix prefix)
 240                 {
 241                         if (coll == null)
 242                                 return;
 243
 244                         int c = coll.Count;
 245                         for (int i = 0; i < c; i++) {
 246                                 ListenerPrefix p = (ListenerPrefix) coll [i];
 247                                 if (p.Path == prefix.Path) {
 248                                         coll.RemoveAt (i);
 249                                         CheckIfRemove ();
 250                                         return;
 251                                 }
 252                         }
 253                 }
 254
 255                 void CheckIfRemove ()
 256                 {
 257                         if (prefixes.Count > 0)
 258                                 return;
 259
 260                         if (unhandled != null && unhandled.Count > 0)
 261                                 return;
 262
 263                         if (all != null && all.Count > 0)
 264                                 return;
 265
 266                         EndPointManager.RemoveEndPoint (this, endpoint);
 267                 }
 268
 269                 public void Close ()
 270                 {
 271                         sock.Close ();
 272                 }
 273
 274                 public void AddPrefix (ListenerPrefix prefix, HttpListener listener)
 275                 {
 276                         lock (prefixes) {
 277                                 if (prefix.Host == "*") {
 278                                         if (unhandled == null)
 279                                                 unhandled = new ArrayList ();
 280
 281                                         prefix.Listener = listener;
 282                                         AddSpecial (unhandled, prefix);
 283                                         return;
 284                                 }
 285
 286                                 if (prefix.Host == "+") {
 287                                         if (all == null)
 288                                                 all = new ArrayList ();
 289                                         prefix.Listener = listener;
 290                                         AddSpecial (all, prefix);
 291                                         return;
 292                                 }
 293
 294                                 if (prefixes.ContainsKey (prefix)) {
 295                                         HttpListener other = (HttpListener) prefixes [prefix];
 296                                         if (other != listener) // TODO: code.
 297                                                 throw new HttpListenerException (400, "There's another listener for " + prefix);
 298                                         return;
 299                                 }
 300
 301                                 prefixes [prefix] = listener;
 302                         }
 303                 }
 304
 305                 public void RemovePrefix (ListenerPrefix prefix, HttpListener listener)
 306                 {
 307                         lock (prefixes) {
 308                                 if (prefix.Host == "*") {
 309                                         RemoveSpecial (unhandled, prefix);
 310                                         return;
 311                                 }
 312
 313                                 if (prefix.Host == "+") {
 314                                         RemoveSpecial (all, prefix);
 315                                         return;
 316                                 }
 317
 318                                 if (prefixes.ContainsKey (prefix)) {
 319                                         prefixes.Remove (prefix);
 320                                 }
 321                         }
 322                 }
 323         }
 324 }
 325 #endif
 326