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 using System.Collections;
  34 using System.Collections.Specialized;
  35 using System.Globalization;
  36 using System.IO;
  37 using System.Security.Cryptography.X509Certificates;
  38 using System.Text;
  39 using System.Security.Authentication.ExtendedProtection;
  40 using System.Threading.Tasks;
  41
  42 namespace System.Net {
  43         public sealed class HttpListenerRequest
  44         {
  45                 class Context : TransportContext
  46                 {
  47                         public override ChannelBinding GetChannelBinding (ChannelBindingKind kind)
  48                         {
  49                                 throw new NotImplementedException ();
  50                         }
  51                 }
  52
  53                 string [] accept_types;
  54                 Encoding content_encoding;
  55                 long content_length;
  56                 bool cl_set;
  57                 CookieCollection cookies;
  58                 WebHeaderCollection headers;
  59                 string method;
  60                 Stream input_stream;
  61                 Version version;
  62                 NameValueCollection query_string; // check if null is ok, check if read-only, check case-sensitiveness
  63                 string raw_url;
  64                 Uri url;
  65                 Uri referrer;
  66                 string [] user_languages;
  67                 HttpListenerContext context;
  68                 bool is_chunked;
  69                 bool ka_set;
  70                 bool keep_alive;
  71                 delegate X509Certificate2 GCCDelegate ();
  72                 GCCDelegate gcc_delegate;
  73
  74                 static byte [] _100continue = Encoding.ASCII.GetBytes ("HTTP/1.1 100 Continue\r\n\r\n");
  75
  76                 internal HttpListenerRequest (HttpListenerContext context)
  77                 {
  78                         this.context = context;
  79                         headers = new WebHeaderCollection ();
  80                         version = HttpVersion.Version10;
  81                 }
  82
  83                 static char [] separators = new char [] { ' ' };
  84
  85                 internal void SetRequestLine (string req)
  86                 {
  87                         string [] parts = req.Split (separators, 3);
  88                         if (parts.Length != 3) {
  89                                 context.ErrorMessage = "Invalid request line (parts).";
  90                                 return;
  91                         }
  92
  93                         method = parts [0];
  94                         foreach (char c in method){
  95                                 int ic = (int) c;
  96
  97                                 if ((ic >= 'A' && ic <= 'Z') ||
  98                                     (ic > 32 && c < 127 && c != '(' && c != ')' && c != '<' &&
  99                                      c != '<' && c != '>' && c != '@' && c != ',' && c != ';' &&
 100                                      c != ':' && c != '\\' && c != '"' && c != '/' && c != '[' &&
 101                                      c != ']' && c != '?' && c != '=' && c != '{' && c != '}'))
 102                                         continue;
 103
 104                                 context.ErrorMessage = "(Invalid verb)";
 105                                 return;
 106                         }
 107
 108                         raw_url = parts [1];
 109                         if (parts [2].Length != 8 || !parts [2].StartsWith ("HTTP/")) {
 110                                 context.ErrorMessage = "Invalid request line (version).";
 111                                 return;
 112                         }
 113
 114                         try {
 115                                 version = new Version (parts [2].Substring (5));
 116                                 if (version.Major < 1)
 117                                         throw new Exception ();
 118                         } catch {
 119                                 context.ErrorMessage = "Invalid request line (version).";
 120                                 return;
 121                         }
 122                 }
 123
 124                 void CreateQueryString (string query)
 125                 {
 126                         if (query == null || query.Length == 0) {
 127                                 query_string = new NameValueCollection (1);
 128                                 return;
 129                         }
 130
 131                         query_string = new NameValueCollection ();
 132                         if (query [0] == '?')
 133                                 query = query.Substring (1);
 134                         string [] components = query.Split ('&');
 135                         foreach (string kv in components) {
 136                                 int pos = kv.IndexOf ('=');
 137                                 if (pos == -1) {
 138                                         query_string.Add (null, WebUtility.UrlDecode (kv));
 139                                 } else {
 140                                         string key = WebUtility.UrlDecode (kv.Substring (0, pos));
 141                                         string val = WebUtility.UrlDecode (kv.Substring (pos + 1));
 142
 143                                         query_string.Add (key, val);
 144                                 }
 145                         }
 146                 }
 147
 148                 internal void FinishInitialization ()
 149                 {
 150                         string host = UserHostName;
 151                         if (version > HttpVersion.Version10 && (host == null || host.Length == 0)) {
 152                                 context.ErrorMessage = "Invalid host name";
 153                                 return;
 154                         }
 155
 156                         string path;
 157                         Uri raw_uri = null;
 158                         if (Uri.MaybeUri (raw_url.ToLowerInvariant ()) && Uri.TryCreate (raw_url, UriKind.Absolute, out raw_uri))
 159                                 path = raw_uri.PathAndQuery;
 160                         else
 161                                 path = raw_url;
 162
 163                         if ((host == null || host.Length == 0))
 164                                 host = UserHostAddress;
 165
 166                         if (raw_uri != null)
 167                                 host = raw_uri.Host;
 168
 169                         int colon = host.IndexOf (':');
 170                         if (colon >= 0)
 171                                 host = host.Substring (0, colon);
 172
 173                         string base_uri = String.Format ("{0}://{1}:{2}",
 174                                                                 (IsSecureConnection) ? "https" : "http",
 175                                                                 host, LocalEndPoint.Port);
 176
 177                         if (!Uri.TryCreate (base_uri + path, UriKind.Absolute, out url)){
 178                                 context.ErrorMessage = "Invalid url: " + base_uri + path;
 179                                 return;
 180                         }
 181
 182                         CreateQueryString (url.Query);
 183
 184                         // Use reference source HttpListenerRequestUriBuilder to process url.
 185                         // Fixes #29927
 186                         url = HttpListenerRequestUriBuilder.GetRequestUri (raw_url, url.Scheme,
 187                                                                 url.Authority, url.LocalPath, url.Query);
 188
 189                         if (version >= HttpVersion.Version11) {
 190                                 string t_encoding = Headers ["Transfer-Encoding"];
 191                                 is_chunked = (t_encoding != null && String.Compare (t_encoding, "chunked", StringComparison.OrdinalIgnoreCase) == 0);
 192                                 // 'identity' is not valid!
 193                                 if (t_encoding != null && !is_chunked) {
 194                                         context.Connection.SendError (null, 501);
 195                                         return;
 196                                 }
 197                         }
 198
 199                         if (!is_chunked && !cl_set) {
 200                                 if (String.Compare (method, "POST", StringComparison.OrdinalIgnoreCase) == 0 ||
 201                                     String.Compare (method, "PUT", StringComparison.OrdinalIgnoreCase) == 0) {
 202                                         context.Connection.SendError (null, 411);
 203                                         return;
 204                                 }
 205                         }
 206
 207                         if (String.Compare (Headers ["Expect"], "100-continue", StringComparison.OrdinalIgnoreCase) == 0) {
 208                                 ResponseStream output = context.Connection.GetResponseStream ();
 209                                 output.InternalWrite (_100continue, 0, _100continue.Length);
 210                         }
 211                 }
 212
 213                 internal static string Unquote (String str) {
 214                         int start = str.IndexOf ('\"');
 215                         int end = str.LastIndexOf ('\"');
 216                         if (start >= 0 && end >=0)
 217                                 str = str.Substring (start + 1, end - 1);
 218                         return str.Trim ();
 219                 }
 220
 221                 internal void AddHeader (string header)
 222                 {
 223                         int colon = header.IndexOf (':');
 224                         if (colon == -1 || colon == 0) {
 225                                 context.ErrorMessage = "Bad Request";
 226                                 context.ErrorStatus = 400;
 227                                 return;
 228                         }
 229
 230                         string name = header.Substring (0, colon).Trim ();
 231                         string val = header.Substring (colon + 1).Trim ();
 232                         string lower = name.ToLower (CultureInfo.InvariantCulture);
 233                         headers.SetInternal (name, val);
 234                         switch (lower) {
 235                                 case "accept-language":
 236                                         user_languages = val.Split (','); // yes, only split with a ','
 237                                         break;
 238                                 case "accept":
 239                                         accept_types = val.Split (','); // yes, only split with a ','
 240                                         break;
 241                                 case "content-length":
 242                                         try {
 243                                                 //TODO: max. content_length?
 244                                                 content_length = Int64.Parse (val.Trim ());
 245                                                 if (content_length < 0)
 246                                                         context.ErrorMessage = "Invalid Content-Length.";
 247                                                 cl_set = true;
 248                                         } catch {
 249                                                 context.ErrorMessage = "Invalid Content-Length.";
 250                                         }
 251
 252                                         break;
 253                                 case "referer":
 254                                         try {
 255                                                 referrer = new Uri (val);
 256                                         } catch {
 257                                                 referrer = new Uri ("http://someone.is.screwing.with.the.headers.com/");
 258                                         }
 259                                         break;
 260                                 case "cookie":
 261                                         if (cookies == null)
 262                                                 cookies = new CookieCollection();
 263
 264                                         string[] cookieStrings = val.Split(new char[] {',', ';'});
 265                                         Cookie current = null;
 266                                         int version = 0;
 267                                         foreach (string cookieString in cookieStrings) {
 268                                                 string str = cookieString.Trim ();
 269                                                 if (str.Length == 0)
 270                                                         continue;
 271                                                 if (str.StartsWith ("$Version")) {
 272                                                         version = Int32.Parse (Unquote (str.Substring (str.IndexOf ('=') + 1)));
 273                                                 } else if (str.StartsWith ("$Path")) {
 274                                                         if (current != null)
 275                                                                 current.Path = str.Substring (str.IndexOf ('=') + 1).Trim ();
 276                                                 } else if (str.StartsWith ("$Domain")) {
 277                                                         if (current != null)
 278                                                                 current.Domain = str.Substring (str.IndexOf ('=') + 1).Trim ();
 279                                                 } else if (str.StartsWith ("$Port")) {
 280                                                         if (current != null)
 281                                                                 current.Port = str.Substring (str.IndexOf ('=') + 1).Trim ();
 282                                                 } else {
 283                                                         if (current != null) {
 284                                                                 cookies.Add (current);
 285                                                         }
 286                                                         current = new Cookie ();
 287                                                         int idx = str.IndexOf ('=');
 288                                                         if (idx > 0) {
 289                                                                 current.Name = str.Substring (0, idx).Trim ();
 290                                                                 current.Value =  str.Substring (idx + 1).Trim ();
 291                                                         } else {
 292                                                                 current.Name = str.Trim ();
 293                                                                 current.Value = String.Empty;
 294                                                         }
 295                                                         current.Version = version;
 296                                                 }
 297                                         }
 298                                         if (current != null) {
 299                                                 cookies.Add (current);
 300                                         }
 301                                         break;
 302                         }
 303                 }
 304
 305                 // returns true is the stream could be reused.
 306                 internal bool FlushInput ()
 307                 {
 308                         if (!HasEntityBody)
 309                                 return true;
 310
 311                         int length = 2048;
 312                         if (content_length > 0)
 313                                 length = (int) Math.Min (content_length, (long) length);
 314
 315                         byte [] bytes = new byte [length];
 316                         while (true) {
 317                                 // TODO: test if MS has a timeout when doing this
 318                                 try {
 319                                         IAsyncResult ares = InputStream.BeginRead (bytes, 0, length, null, null);
 320                                         if (!ares.IsCompleted && !ares.AsyncWaitHandle.WaitOne (1000))
 321                                                 return false;
 322                                         if (InputStream.EndRead (ares) <= 0)
 323                                                 return true;
 324                                 } catch (ObjectDisposedException e) {
 325                                         input_stream = null;
 326                                         return true;
 327                                 } catch {
 328                                         return false;
 329                                 }
 330                         }
 331                 }
 332
 333                 public string [] AcceptTypes {
 334                         get { return accept_types; }
 335                 }
 336
 337                 public int ClientCertificateError {
 338                         get {
 339                                 HttpConnection cnc = context.Connection;
 340                                 if (cnc.ClientCertificate == null)
 341                                         throw new InvalidOperationException ("No client certificate");
 342                                 int [] errors = cnc.ClientCertificateErrors;
 343                                 if (errors != null && errors.Length > 0)
 344                                         return errors [0];
 345                                 return 0;
 346                         }
 347                 }
 348
 349                 public Encoding ContentEncoding {
 350                         get {
 351                                 if (content_encoding == null)
 352                                         content_encoding = Encoding.Default;
 353                                 return content_encoding;
 354                         }
 355                 }
 356
 357                 public long ContentLength64 {
 358                         get { return content_length; }
 359                 }
 360
 361                 public string ContentType {
 362                         get { return headers ["content-type"]; }
 363                 }
 364
 365                 public CookieCollection Cookies {
 366                         get {
 367                                 // TODO: check if the collection is read-only
 368                                 if (cookies == null)
 369                                         cookies = new CookieCollection ();
 370                                 return cookies;
 371                         }
 372                 }
 373
 374                 public bool HasEntityBody {
 375                         get { return (content_length > 0 || is_chunked); }
 376                 }
 377
 378                 public NameValueCollection Headers {
 379                         get { return headers; }
 380                 }
 381
 382                 public string HttpMethod {
 383                         get { return method; }
 384                 }
 385
 386                 public Stream InputStream {
 387                         get {
 388                                 if (input_stream == null) {
 389                                         if (is_chunked || content_length > 0)
 390                                                 input_stream = context.Connection.GetRequestStream (is_chunked, content_length);
 391                                         else
 392                                                 input_stream = Stream.Null;
 393                                 }
 394
 395                                 return input_stream;
 396                         }
 397                 }
 398
 399                 [MonoTODO ("Always returns false")]
 400                 public bool IsAuthenticated {
 401                         get { return false; }
 402                 }
 403
 404                 public bool IsLocal {
 405                         get { return IPAddress.IsLoopback (RemoteEndPoint.Address); }
 406                 }
 407
 408                 public bool IsSecureConnection {
 409                         get { return context.Connection.IsSecure; }
 410                 }
 411
 412                 public bool KeepAlive {
 413                         get {
 414                                 if (ka_set)
 415                                         return keep_alive;
 416
 417                                 ka_set = true;
 418                                 // 1. Connection header
 419                                 // 2. Protocol (1.1 == keep-alive by default)
 420                                 // 3. Keep-Alive header
 421                                 string cnc = headers ["Connection"];
 422                                 if (!String.IsNullOrEmpty (cnc)) {
 423                                         keep_alive = (0 == String.Compare (cnc, "keep-alive", StringComparison.OrdinalIgnoreCase));
 424                                 } else if (version == HttpVersion.Version11) {
 425                                         keep_alive = true;
 426                                 } else {
 427                                         cnc = headers ["keep-alive"];
 428                                         if (!String.IsNullOrEmpty (cnc))
 429                                                 keep_alive = (0 != String.Compare (cnc, "closed", StringComparison.OrdinalIgnoreCase));
 430                                 }
 431                                 return keep_alive;
 432                         }
 433                 }
 434
 435                 public IPEndPoint LocalEndPoint {
 436                         get { return context.Connection.LocalEndPoint; }
 437                 }
 438
 439                 public Version ProtocolVersion {
 440                         get { return version; }
 441                 }
 442
 443                 public NameValueCollection QueryString {
 444                         get { return query_string; }
 445                 }
 446
 447                 public string RawUrl {
 448                         get { return raw_url; }
 449                 }
 450
 451                 public IPEndPoint RemoteEndPoint {
 452                         get { return context.Connection.RemoteEndPoint; }
 453                 }
 454
 455                 [MonoTODO ("Always returns Guid.Empty")]
 456                 public Guid RequestTraceIdentifier {
 457                         get { return Guid.Empty; }
 458                 }
 459
 460                 public Uri Url {
 461                         get { return url; }
 462                 }
 463
 464                 public Uri UrlReferrer {
 465                         get { return referrer; }
 466                 }
 467
 468                 public string UserAgent {
 469                         get { return headers ["user-agent"]; }
 470                 }
 471
 472                 public string UserHostAddress {
 473                         get { return LocalEndPoint.ToString (); }
 474                 }
 475
 476                 public string UserHostName {
 477                         get { return headers ["host"]; }
 478                 }
 479
 480                 public string [] UserLanguages {
 481                         get { return user_languages; }
 482                 }
 483
 484                 public IAsyncResult BeginGetClientCertificate (AsyncCallback requestCallback, object state)
 485                 {
 486                         if (gcc_delegate == null)
 487                                 gcc_delegate = new GCCDelegate (GetClientCertificate);
 488                         return gcc_delegate.BeginInvoke (requestCallback, state);
 489                 }
 490
 491                 public X509Certificate2 EndGetClientCertificate (IAsyncResult asyncResult)
 492                 {
 493                         if (asyncResult == null)
 494                                 throw new ArgumentNullException ("asyncResult");
 495
 496                         if (gcc_delegate == null)
 497                                 throw new InvalidOperationException ();
 498
 499                         return gcc_delegate.EndInvoke (asyncResult);
 500                 }
 501
 502                 public X509Certificate2 GetClientCertificate ()
 503                 {
 504                         return context.Connection.ClientCertificate;
 505                 }
 506
 507                 [MonoTODO]
 508                 public string ServiceName {
 509                         get {
 510                                 return null;
 511                         }
 512                 }
 513
 514                 public TransportContext TransportContext {
 515                         get {
 516                                 return new Context ();
 517                         }
 518                 }
 519
 520                 [MonoTODO]
 521                 public bool IsWebSocketRequest {
 522                         get {
 523                                 return false;
 524                         }
 525                 }
 526
 527                 public Task<X509Certificate2> GetClientCertificateAsync ()
 528                 {
 529                         return Task<X509Certificate2>.Factory.FromAsync (BeginGetClientCertificate, EndGetClientCertificate, null);
 530                 }
 531         }
 532 }
 533 #endif
 534