mcs/class/System/System.Net/HttpListenerRequest.cs

   1 //
   2 // System.Net.HttpListenerRequest
   3 //
   4 // Authors:
   5 //      Gonzalo Paniagua Javier (gonzalo.mono@gmail.com)
   6 //      Marek Safar (marek.safar@gmail.com)
   7 //
   8 // Copyright (c) 2005 Novell, Inc. (http://www.novell.com)
   9 // Copyright (c) 2011-2012 Xamarin, Inc. (http://xamarin.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 SECURITY_DEP
  32
  33 #if MONOTOUCH || MONODROID
  34 using Mono.Security.Protocol.Tls;
  35 #else
  36 extern alias MonoSecurity;
  37 using MonoSecurity::Mono.Security.Protocol.Tls;
  38 #endif
  39
  40 using System.Collections;
  41 using System.Collections.Specialized;
  42 using System.Globalization;
  43 using System.IO;
  44 using System.Security.Cryptography.X509Certificates;
  45 using System.Text;
  46 #if NET_4_0
  47 using System.Security.Authentication.ExtendedProtection;
  48 #endif
  49 #if NET_4_5
  50 using System.Threading.Tasks;
  51 #endif
  52
  53 namespace System.Net {
  54         public sealed class HttpListenerRequest
  55         {
  56 #if NET_4_0
  57                 class Context : TransportContext
  58                 {
  59                         public override ChannelBinding GetChannelBinding (ChannelBindingKind kind)
  60                         {
  61                                 throw new NotImplementedException ();
  62                         }
  63                 }
  64 #endif
  65
  66                 string [] accept_types;
  67                 Encoding content_encoding;
  68                 long content_length;
  69                 bool cl_set;
  70                 CookieCollection cookies;
  71                 WebHeaderCollection headers;
  72                 string method;
  73                 Stream input_stream;
  74                 Version version;
  75                 NameValueCollection query_string; // check if null is ok, check if read-only, check case-sensitiveness
  76                 string raw_url;
  77                 Uri url;
  78                 Uri referrer;
  79                 string [] user_languages;
  80                 HttpListenerContext context;
  81                 bool is_chunked;
  82                 bool ka_set;
  83                 bool keep_alive;
  84                 delegate X509Certificate2 GCCDelegate ();
  85                 GCCDelegate gcc_delegate;
  86
  87                 static byte [] _100continue = Encoding.ASCII.GetBytes ("HTTP/1.1 100 Continue\r\n\r\n");
  88
  89                 internal HttpListenerRequest (HttpListenerContext context)
  90                 {
  91                         this.context = context;
  92                         headers = new WebHeaderCollection ();
  93                         version = HttpVersion.Version10;
  94                 }
  95
  96                 static char [] separators = new char [] { ' ' };
  97
  98                 internal void SetRequestLine (string req)
  99                 {
 100                         string [] parts = req.Split (separators, 3);
 101                         if (parts.Length != 3) {
 102                                 context.ErrorMessage = "Invalid request line (parts).";
 103                                 return;
 104                         }
 105
 106                         method = parts [0];
 107                         foreach (char c in method){
 108                                 int ic = (int) c;
 109
 110                                 if ((ic >= 'A' && ic <= 'Z') ||
 111                                     (ic > 32 && c < 127 && c != '(' && c != ')' && c != '<' &&
 112                                      c != '<' && c != '>' && c != '@' && c != ',' && c != ';' &&
 113                                      c != ':' && c != '\\' && c != '"' && c != '/' && c != '[' &&
 114                                      c != ']' && c != '?' && c != '=' && c != '{' && c != '}'))
 115                                         continue;
 116
 117                                 context.ErrorMessage = "(Invalid verb)";
 118                                 return;
 119                         }
 120
 121                         raw_url = parts [1];
 122                         if (parts [2].Length != 8 || !parts [2].StartsWith ("HTTP/")) {
 123                                 context.ErrorMessage = "Invalid request line (version).";
 124                                 return;
 125                         }
 126
 127                         try {
 128                                 version = new Version (parts [2].Substring (5));
 129                                 if (version.Major < 1)
 130                                         throw new Exception ();
 131                         } catch {
 132                                 context.ErrorMessage = "Invalid request line (version).";
 133                                 return;
 134                         }
 135                 }
 136
 137                 void CreateQueryString (string query)
 138                 {
 139                         if (query == null || query.Length == 0) {
 140                                 query_string = new NameValueCollection (1);
 141                                 return;
 142                         }
 143
 144                         query_string = new NameValueCollection ();
 145                         if (query [0] == '?')
 146                                 query = query.Substring (1);
 147                         string [] components = query.Split ('&');
 148                         foreach (string kv in components) {
 149                                 int pos = kv.IndexOf ('=');
 150                                 if (pos == -1) {
 151                                         query_string.Add (null, HttpUtility.UrlDecode (kv));
 152                                 } else {
 153                                         string key = HttpUtility.UrlDecode (kv.Substring (0, pos));
 154                                         string val = HttpUtility.UrlDecode (kv.Substring (pos + 1));
 155
 156                                         query_string.Add (key, val);
 157                                 }
 158                         }
 159                 }
 160
 161                 internal void FinishInitialization ()
 162                 {
 163                         string host = UserHostName;
 164                         if (version > HttpVersion.Version10 && (host == null || host.Length == 0)) {
 165                                 context.ErrorMessage = "Invalid host name";
 166                                 return;
 167                         }
 168
 169                         string path;
 170                         Uri raw_uri = null;
 171                         if (Uri.MaybeUri (raw_url) && Uri.TryCreate (raw_url, UriKind.Absolute, out raw_uri))
 172                                 path = raw_uri.PathAndQuery;
 173                         else
 174                                 path = raw_url;
 175
 176                         if ((host == null || host.Length == 0))
 177                                 host = UserHostAddress;
 178
 179                         if (raw_uri != null)
 180                                 host = raw_uri.Host;
 181
 182                         int colon = host.IndexOf (':');
 183                         if (colon >= 0)
 184                                 host = host.Substring (0, colon);
 185
 186                         string base_uri = String.Format ("{0}://{1}:{2}",
 187                                                                 (IsSecureConnection) ? "https" : "http",
 188                                                                 host, LocalEndPoint.Port);
 189
 190                         if (!Uri.TryCreate (base_uri + path, UriKind.Absolute, out url)){
 191                                 context.ErrorMessage = "Invalid url: " + base_uri + path;
 192                                 return;
 193                         }
 194
 195                         CreateQueryString (url.Query);
 196
 197                         if (version >= HttpVersion.Version11) {
 198                                 string t_encoding = Headers ["Transfer-Encoding"];
 199                                 is_chunked = (t_encoding != null && String.Compare (t_encoding, "chunked", StringComparison.OrdinalIgnoreCase) == 0);
 200                                 // 'identity' is not valid!
 201                                 if (t_encoding != null && !is_chunked) {
 202                                         context.Connection.SendError (null, 501);
 203                                         return;
 204                                 }
 205                         }
 206
 207                         if (!is_chunked && !cl_set) {
 208                                 if (String.Compare (method, "POST", StringComparison.OrdinalIgnoreCase) == 0 ||
 209                                     String.Compare (method, "PUT", StringComparison.OrdinalIgnoreCase) == 0) {
 210                                         context.Connection.SendError (null, 411);
 211                                         return;
 212                                 }
 213                         }
 214
 215                         if (String.Compare (Headers ["Expect"], "100-continue", StringComparison.OrdinalIgnoreCase) == 0) {
 216                                 ResponseStream output = context.Connection.GetResponseStream ();
 217                                 output.InternalWrite (_100continue, 0, _100continue.Length);
 218                         }
 219                 }
 220
 221                 internal static string Unquote (String str) {
 222                         int start = str.IndexOf ('\"');
 223                         int end = str.LastIndexOf ('\"');
 224                         if (start >= 0 && end >=0)
 225                                 str = str.Substring (start + 1, end - 1);
 226                         return str.Trim ();
 227                 }
 228
 229                 internal void AddHeader (string header)
 230                 {
 231                         int colon = header.IndexOf (':');
 232                         if (colon == -1 || colon == 0) {
 233                                 context.ErrorMessage = "Bad Request";
 234                                 context.ErrorStatus = 400;
 235                                 return;
 236                         }
 237
 238                         string name = header.Substring (0, colon).Trim ();
 239                         string val = header.Substring (colon + 1).Trim ();
 240                         string lower = name.ToLower (CultureInfo.InvariantCulture);
 241                         headers.SetInternal (name, val);
 242                         switch (lower) {
 243                                 case "accept-language":
 244                                         user_languages = val.Split (','); // yes, only split with a ','
 245                                         break;
 246                                 case "accept":
 247                                         accept_types = val.Split (','); // yes, only split with a ','
 248                                         break;
 249                                 case "content-length":
 250                                         try {
 251                                                 //TODO: max. content_length?
 252                                                 content_length = Int64.Parse (val.Trim ());
 253                                                 if (content_length < 0)
 254                                                         context.ErrorMessage = "Invalid Content-Length.";
 255                                                 cl_set = true;
 256                                         } catch {
 257                                                 context.ErrorMessage = "Invalid Content-Length.";
 258                                         }
 259
 260                                         break;
 261                                 case "referer":
 262                                         try {
 263                                                 referrer = new Uri (val);
 264                                         } catch {
 265                                                 referrer = new Uri ("http://someone.is.screwing.with.the.headers.com/");
 266                                         }
 267                                         break;
 268                                 case "cookie":
 269                                         if (cookies == null)
 270                                                 cookies = new CookieCollection();
 271
 272                                         string[] cookieStrings = val.Split(new char[] {',', ';'});
 273                                         Cookie current = null;
 274                                         int version = 0;
 275                                         foreach (string cookieString in cookieStrings) {
 276                                                 string str = cookieString.Trim ();
 277                                                 if (str.Length == 0)
 278                                                         continue;
 279                                                 if (str.StartsWith ("$Version")) {
 280                                                         version = Int32.Parse (Unquote (str.Substring (str.IndexOf ('=') + 1)));
 281                                                 } else if (str.StartsWith ("$Path")) {
 282                                                         if (current != null)
 283                                                                 current.Path = str.Substring (str.IndexOf ('=') + 1).Trim ();
 284                                                 } else if (str.StartsWith ("$Domain")) {
 285                                                         if (current != null)
 286                                                                 current.Domain = str.Substring (str.IndexOf ('=') + 1).Trim ();
 287                                                 } else if (str.StartsWith ("$Port")) {
 288                                                         if (current != null)
 289                                                                 current.Port = str.Substring (str.IndexOf ('=') + 1).Trim ();
 290                                                 } else {
 291                                                         if (current != null) {
 292                                                                 cookies.Add (current);
 293                                                         }
 294                                                         current = new Cookie ();
 295                                                         int idx = str.IndexOf ('=');
 296                                                         if (idx > 0) {
 297                                                                 current.Name = str.Substring (0, idx).Trim ();
 298                                                                 current.Value =  str.Substring (idx + 1).Trim ();
 299                                                         } else {
 300                                                                 current.Name = str.Trim ();
 301                                                                 current.Value = String.Empty;
 302                                                         }
 303                                                         current.Version = version;
 304                                                 }
 305                                         }
 306                                         if (current != null) {
 307                                                 cookies.Add (current);
 308                                         }
 309                                         break;
 310                         }
 311                 }
 312
 313                 // returns true is the stream could be reused.
 314                 internal bool FlushInput ()
 315                 {
 316                         if (!HasEntityBody)
 317                                 return true;
 318
 319                         int length = 2048;
 320                         if (content_length > 0)
 321                                 length = (int) Math.Min (content_length, (long) length);
 322
 323                         byte [] bytes = new byte [length];
 324                         while (true) {
 325                                 // TODO: test if MS has a timeout when doing this
 326                                 try {
 327                                         IAsyncResult ares = InputStream.BeginRead (bytes, 0, length, null, null);
 328                                         if (!ares.IsCompleted && !ares.AsyncWaitHandle.WaitOne (1000))
 329                                                 return false;
 330                                         if (InputStream.EndRead (ares) <= 0)
 331                                                 return true;
 332                                 } catch {
 333                                         return false;
 334                                 }
 335                         }
 336                 }
 337
 338                 public string [] AcceptTypes {
 339                         get { return accept_types; }
 340                 }
 341
 342                 public int ClientCertificateError {
 343                         get {
 344                                 HttpConnection cnc = context.Connection;
 345                                 if (cnc.ClientCertificate == null)
 346                                         throw new InvalidOperationException ("No client certificate");
 347                                 int [] errors = cnc.ClientCertificateErrors;
 348                                 if (errors != null && errors.Length > 0)
 349                                         return errors [0];
 350                                 return 0;
 351                         }
 352                 }
 353
 354                 public Encoding ContentEncoding {
 355                         get {
 356                                 if (content_encoding == null)
 357                                         content_encoding = Encoding.Default;
 358                                 return content_encoding;
 359                         }
 360                 }
 361
 362                 public long ContentLength64 {
 363                         get { return content_length; }
 364                 }
 365
 366                 public string ContentType {
 367                         get { return headers ["content-type"]; }
 368                 }
 369
 370                 public CookieCollection Cookies {
 371                         get {
 372                                 // TODO: check if the collection is read-only
 373                                 if (cookies == null)
 374                                         cookies = new CookieCollection ();
 375                                 return cookies;
 376                         }
 377                 }
 378
 379                 public bool HasEntityBody {
 380                         get { return (content_length > 0 || is_chunked); }
 381                 }
 382
 383                 public NameValueCollection Headers {
 384                         get { return headers; }
 385                 }
 386
 387                 public string HttpMethod {
 388                         get { return method; }
 389                 }
 390
 391                 public Stream InputStream {
 392                         get {
 393                                 if (input_stream == null) {
 394                                         if (is_chunked || content_length > 0)
 395                                                 input_stream = context.Connection.GetRequestStream (is_chunked, content_length);
 396                                         else
 397                                                 input_stream = Stream.Null;
 398                                 }
 399
 400                                 return input_stream;
 401                         }
 402                 }
 403
 404                 [MonoTODO ("Always returns false")]
 405                 public bool IsAuthenticated {
 406                         get { return false; }
 407                 }
 408
 409                 public bool IsLocal {
 410                         get { return IPAddress.IsLoopback (RemoteEndPoint.Address); }
 411                 }
 412
 413                 public bool IsSecureConnection {
 414                         get { return context.Connection.IsSecure; }
 415                 }
 416
 417                 public bool KeepAlive {
 418                         get {
 419                                 if (ka_set)
 420                                         return keep_alive;
 421
 422                                 ka_set = true;
 423                                 // 1. Connection header
 424                                 // 2. Protocol (1.1 == keep-alive by default)
 425                                 // 3. Keep-Alive header
 426                                 string cnc = headers ["Connection"];
 427                                 if (!String.IsNullOrEmpty (cnc)) {
 428                                         keep_alive = (0 == String.Compare (cnc, "keep-alive", StringComparison.OrdinalIgnoreCase));
 429                                 } else if (version == HttpVersion.Version11) {
 430                                         keep_alive = true;
 431                                 } else {
 432                                         cnc = headers ["keep-alive"];
 433                                         if (!String.IsNullOrEmpty (cnc))
 434                                                 keep_alive = (0 != String.Compare (cnc, "closed", StringComparison.OrdinalIgnoreCase));
 435                                 }
 436                                 return keep_alive;
 437                         }
 438                 }
 439
 440                 public IPEndPoint LocalEndPoint {
 441                         get { return context.Connection.LocalEndPoint; }
 442                 }
 443
 444                 public Version ProtocolVersion {
 445                         get { return version; }
 446                 }
 447
 448                 public NameValueCollection QueryString {
 449                         get { return query_string; }
 450                 }
 451
 452                 public string RawUrl {
 453                         get { return raw_url; }
 454                 }
 455
 456                 public IPEndPoint RemoteEndPoint {
 457                         get { return context.Connection.RemoteEndPoint; }
 458                 }
 459
 460                 [MonoTODO ("Always returns Guid.Empty")]
 461                 public Guid RequestTraceIdentifier {
 462                         get { return Guid.Empty; }
 463                 }
 464
 465                 public Uri Url {
 466                         get { return url; }
 467                 }
 468
 469                 public Uri UrlReferrer {
 470                         get { return referrer; }
 471                 }
 472
 473                 public string UserAgent {
 474                         get { return headers ["user-agent"]; }
 475                 }
 476
 477                 public string UserHostAddress {
 478                         get { return LocalEndPoint.ToString (); }
 479                 }
 480
 481                 public string UserHostName {
 482                         get { return headers ["host"]; }
 483                 }
 484
 485                 public string [] UserLanguages {
 486                         get { return user_languages; }
 487                 }
 488
 489                 public IAsyncResult BeginGetClientCertificate (AsyncCallback requestCallback, object state)
 490                 {
 491                         if (gcc_delegate == null)
 492                                 gcc_delegate = new GCCDelegate (GetClientCertificate);
 493                         return gcc_delegate.BeginInvoke (requestCallback, state);
 494                 }
 495
 496                 public X509Certificate2 EndGetClientCertificate (IAsyncResult asyncResult)
 497                 {
 498                         if (asyncResult == null)
 499                                 throw new ArgumentNullException ("asyncResult");
 500
 501                         if (gcc_delegate == null)
 502                                 throw new InvalidOperationException ();
 503
 504                         return gcc_delegate.EndInvoke (asyncResult);
 505                 }
 506
 507                 public X509Certificate2 GetClientCertificate ()
 508                 {
 509                         return context.Connection.ClientCertificate;
 510                 }
 511
 512 #if NET_4_0
 513                 [MonoTODO]
 514                 public string ServiceName {
 515                         get {
 516                                 return null;
 517                         }
 518                 }
 519
 520                 public TransportContext TransportContext {
 521                         get {
 522                                 return new Context ();
 523                         }
 524                 }
 525 #endif
 526
 527 #if NET_4_5
 528                 [MonoTODO]
 529                 public bool IsWebSocketRequest {
 530                         get {
 531                                 return false;
 532                         }
 533                 }
 534
 535                 public Task<X509Certificate2> GetClientCertificateAsync ()
 536                 {
 537                         return Task<X509Certificate2>.Factory.FromAsync (BeginGetClientCertificate, EndGetClientCertificate, null);
 538                 }
 539 #endif
 540         }
 541 }
 542 #endif
 543