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