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

   1 //
   2 // System.Net.HttpListenerRequest
   3 //
   4 // Author:
   5 //      Gonzalo Paniagua Javier (gonzalo@novell.com)
   6 //
   7 // Copyright (c) 2005 Novell, Inc. (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 #if NET_2_0 && SECURITY_DEP
  30
  31 using System.Collections;
  32 using System.Collections.Specialized;
  33 using System.Globalization;
  34 using System.IO;
  35 using System.Security.Cryptography.X509Certificates;
  36 using System.Text;
  37 namespace System.Net {
  38         public sealed class HttpListenerRequest
  39         {
  40                 string [] accept_types;
  41 //              int client_cert_error;
  42 //              bool no_get_certificate;
  43                 Encoding content_encoding;
  44                 long content_length;
  45                 bool cl_set;
  46                 CookieCollection cookies;
  47                 WebHeaderCollection headers;
  48                 string method;
  49                 Stream input_stream;
  50                 Version version;
  51                 NameValueCollection query_string; // check if null is ok, check if read-only, check case-sensitiveness
  52                 string raw_url;
  53                 Uri url;
  54                 Uri referrer;
  55                 string [] user_languages;
  56                 HttpListenerContext context;
  57                 bool is_chunked;
  58                 bool ka_set;
  59                 bool keep_alive;
  60                 static byte [] _100continue = Encoding.ASCII.GetBytes ("HTTP/1.1 100 Continue\r\n\r\n");
  61
  62                 internal HttpListenerRequest (HttpListenerContext context)
  63                 {
  64                         this.context = context;
  65                         headers = new WebHeaderCollection ();
  66                         version = HttpVersion.Version10;
  67                 }
  68
  69                 static char [] separators = new char [] { ' ' };
  70
  71                 internal void SetRequestLine (string req)
  72                 {
  73                         string [] parts = req.Split (separators, 3);
  74                         if (parts.Length != 3) {
  75                                 context.ErrorMessage = "Invalid request line (parts).";
  76                                 return;
  77                         }
  78
  79                         method = parts [0];
  80                         foreach (char c in method){
  81                                 int ic = (int) c;
  82
  83                                 if ((ic >= 'A' && ic <= 'Z') ||
  84                                     (ic > 32 && c < 127 && c != '(' && c != ')' && c != '<' &&
  85                                      c != '<' && c != '>' && c != '@' && c != ',' && c != ';' &&
  86                                      c != ':' && c != '\\' && c != '"' && c != '/' && c != '[' &&
  87                                      c != ']' && c != '?' && c != '=' && c != '{' && c != '}'))
  88                                         continue;
  89
  90                                 context.ErrorMessage = "(Invalid verb)";
  91                                 return;
  92                         }
  93
  94                         raw_url = parts [1];
  95                         if (parts [2].Length != 8 || !parts [2].StartsWith ("HTTP/")) {
  96                                 context.ErrorMessage = "Invalid request line (version).";
  97                                 return;
  98                         }
  99
 100                         try {
 101                                 version = new Version (parts [2].Substring (5));
 102                                 if (version.Major < 1)
 103                                         throw new Exception ();
 104                         } catch {
 105                                 context.ErrorMessage = "Invalid request line (version).";
 106                                 return;
 107                         }
 108                 }
 109
 110                 void CreateQueryString (string query)
 111                 {
 112                         query_string = new NameValueCollection ();
 113                         if (query == null || query.Length == 0)
 114                                 return;
 115
 116                         if (query [0] == '?')
 117                                 query = query.Substring (1);
 118                         string [] components = query.Split ('&');
 119                         foreach (string kv in components) {
 120                                 int pos = kv.IndexOf ('=');
 121                                 if (pos == -1) {
 122                                         query_string.Add (null, HttpUtility.UrlDecode (kv));
 123                                 } else {
 124                                         string key = HttpUtility.UrlDecode (kv.Substring (0, pos));
 125                                         string val = HttpUtility.UrlDecode (kv.Substring (pos + 1));
 126
 127                                         query_string.Add (key, val);
 128                                 }
 129                         }
 130                 }
 131
 132                 internal void FinishInitialization ()
 133                 {
 134                         string host = UserHostName;
 135                         if (version > HttpVersion.Version10 && (host == null || host.Length == 0)) {
 136                                 context.ErrorMessage = "Invalid host name";
 137                                 return;
 138                         }
 139
 140                         string path;
 141                         Uri raw_uri = null;
 142                         if (Uri.MaybeUri (raw_url) && Uri.TryCreate (raw_url, UriKind.Absolute, out raw_uri))
 143                                 path = raw_uri.PathAndQuery;
 144                         else
 145                                 path = raw_url;
 146
 147                         if ((host == null || host.Length == 0))
 148                                 host = UserHostAddress;
 149
 150                         if (raw_uri != null)
 151                                 host = raw_uri.Host;
 152
 153                         int colon = host.IndexOf (':');
 154                         if (colon >= 0)
 155                                 host = host.Substring (0, colon);
 156
 157                         string base_uri = String.Format ("{0}://{1}:{2}",
 158                                                                 (IsSecureConnection) ? "https" : "http",
 159                                                                 host, LocalEndPoint.Port);
 160
 161                         if (!Uri.TryCreate (base_uri + path, UriKind.Absolute, out url)){
 162                                 context.ErrorMessage = "Invalid url: " + base_uri + path;
 163                                 return;
 164                         }
 165
 166                         CreateQueryString (url.Query);
 167
 168                         if (version >= HttpVersion.Version11) {
 169                                 string t_encoding = Headers ["Transfer-Encoding"];
 170                                 is_chunked = (t_encoding != null && String.Compare (t_encoding, "chunked", StringComparison.OrdinalIgnoreCase) == 0);
 171                                 // 'identity' is not valid!
 172                                 if (t_encoding != null && !is_chunked) {
 173                                         context.Connection.SendError (null, 501);
 174                                         return;
 175                                 }
 176                         }
 177
 178                         if (!is_chunked && !cl_set) {
 179                                 if (String.Compare (method, "POST", StringComparison.OrdinalIgnoreCase) == 0 ||
 180                                     String.Compare (method, "PUT", StringComparison.OrdinalIgnoreCase) == 0) {
 181                                         context.Connection.SendError (null, 411);
 182                                         return;
 183                                 }
 184                         }
 185
 186                         if (String.Compare (Headers ["Expect"], "100-continue", StringComparison.OrdinalIgnoreCase) == 0) {
 187                                 ResponseStream output = context.Connection.GetResponseStream ();
 188                                 output.InternalWrite (_100continue, 0, _100continue.Length);
 189                         }
 190                 }
 191
 192                 internal static string Unquote (String str) {
 193                         int start = str.IndexOf ('\"');
 194                         int end = str.LastIndexOf ('\"');
 195                         if (start >= 0 && end >=0)
 196                                 str = str.Substring (start + 1, end - 1);
 197                         return str.Trim ();
 198                 }
 199
 200                 internal void AddHeader (string header)
 201                 {
 202                         int colon = header.IndexOf (':');
 203                         if (colon == -1 || colon == 0) {
 204                                 context.ErrorMessage = "Bad Request";
 205                                 context.ErrorStatus = 400;
 206                                 return;
 207                         }
 208
 209                         string name = header.Substring (0, colon).Trim ();
 210                         string val = header.Substring (colon + 1).Trim ();
 211                         string lower = name.ToLower (CultureInfo.InvariantCulture);
 212                         headers.SetInternal (name, val);
 213                         switch (lower) {
 214                                 case "accept-language":
 215                                         user_languages = val.Split (','); // yes, only split with a ','
 216                                         break;
 217                                 case "accept":
 218                                         accept_types = val.Split (','); // yes, only split with a ','
 219                                         break;
 220                                 case "content-length":
 221                                         try {
 222                                                 //TODO: max. content_length?
 223                                                 content_length = Int64.Parse (val.Trim ());
 224                                                 if (content_length < 0)
 225                                                         context.ErrorMessage = "Invalid Content-Length.";
 226                                                 cl_set = true;
 227                                         } catch {
 228                                                 context.ErrorMessage = "Invalid Content-Length.";
 229                                         }
 230
 231                                         break;
 232                                 case "referer":
 233                                         try {
 234                                                 referrer = new Uri (val);
 235                                         } catch {
 236                                                 referrer = new Uri ("http://someone.is.screwing.with.the.headers.com/");
 237                                         }
 238                                         break;
 239                                 case "cookie":
 240                                         if (cookies == null)
 241                                                 cookies = new CookieCollection();
 242
 243                                         string[] cookieStrings = val.Split(new char[] {',', ';'});
 244                                         Cookie current = null;
 245                                         int version = 0;
 246                                         foreach (string cookieString in cookieStrings) {
 247                                                 string str = cookieString.Trim ();
 248                                                 if (str.Length == 0)
 249                                                         continue;
 250                                                 if (str.StartsWith ("$Version")) {
 251                                                         version = Int32.Parse (Unquote (str.Substring (str.IndexOf ('=') + 1)));
 252                                                 } else if (str.StartsWith ("$Path")) {
 253                                                         if (current != null)
 254                                                                 current.Path = str.Substring (str.IndexOf ('=') + 1).Trim ();
 255                                                 } else if (str.StartsWith ("$Domain")) {
 256                                                         if (current != null)
 257                                                                 current.Domain = str.Substring (str.IndexOf ('=') + 1).Trim ();
 258                                                 } else if (str.StartsWith ("$Port")) {
 259                                                         if (current != null)
 260                                                                 current.Port = str.Substring (str.IndexOf ('=') + 1).Trim ();
 261                                                 } else {
 262                                                         if (current != null) {
 263                                                                 cookies.Add (current);
 264                                                         }
 265                                                         current = new Cookie ();
 266                                                         int idx = str.IndexOf ('=');
 267                                                         if (idx > 0) {
 268                                                                 current.Name = str.Substring (0, idx).Trim ();
 269                                                                 current.Value =  str.Substring (idx + 1).Trim ();
 270                                                         } else {
 271                                                                 current.Name = str.Trim ();
 272                                                                 current.Value = String.Empty;
 273                                                         }
 274                                                         current.Version = version;
 275                                                 }
 276                                         }
 277                                         if (current != null) {
 278                                                 cookies.Add (current);
 279                                         }
 280                                         break;
 281                         }
 282                 }
 283
 284                 // returns true is the stream could be reused.
 285                 internal bool FlushInput ()
 286                 {
 287                         if (!HasEntityBody)
 288                                 return true;
 289
 290                         int length = 2048;
 291                         if (content_length > 0)
 292                                 length = (int) Math.Min (content_length, (long) length);
 293
 294                         byte [] bytes = new byte [length];
 295                         while (true) {
 296                                 // TODO: test if MS has a timeout when doing this
 297                                 try {
 298                                         if (InputStream.Read (bytes, 0, length) <= 0)
 299                                                 return true;
 300                                 } catch {
 301                                         return false;
 302                                 }
 303                         }
 304                 }
 305
 306                 public string [] AcceptTypes {
 307                         get { return accept_types; }
 308                 }
 309
 310                 [MonoTODO ("Always returns 0")]
 311                 public int ClientCertificateError {
 312                         get {
 313 /*
 314                                 if (no_get_certificate)
 315                                         throw new InvalidOperationException (
 316                                                 "Call GetClientCertificate() before calling this method.");
 317                                 return client_cert_error;
 318 */
 319                                 return 0;
 320                         }
 321                 }
 322
 323                 public Encoding ContentEncoding {
 324                         get {
 325                                 if (content_encoding == null)
 326                                         content_encoding = Encoding.Default;
 327                                 return content_encoding;
 328                         }
 329                 }
 330
 331                 public long ContentLength64 {
 332                         get { return content_length; }
 333                 }
 334
 335                 public string ContentType {
 336                         get { return headers ["content-type"]; }
 337                 }
 338
 339                 public CookieCollection Cookies {
 340                         get {
 341                                 // TODO: check if the collection is read-only
 342                                 if (cookies == null)
 343                                         cookies = new CookieCollection ();
 344                                 return cookies;
 345                         }
 346                 }
 347
 348                 public bool HasEntityBody {
 349                         get { return (content_length > 0 || is_chunked); }
 350                 }
 351
 352                 public NameValueCollection Headers {
 353                         get { return headers; }
 354                 }
 355
 356                 public string HttpMethod {
 357                         get { return method; }
 358                 }
 359
 360                 public Stream InputStream {
 361                         get {
 362                                 if (input_stream == null) {
 363                                         if (is_chunked || content_length > 0)
 364                                                 input_stream = context.Connection.GetRequestStream (is_chunked, content_length);
 365                                         else
 366                                                 input_stream = Stream.Null;
 367                                 }
 368
 369                                 return input_stream;
 370                         }
 371                 }
 372
 373                 [MonoTODO ("Always returns false")]
 374                 public bool IsAuthenticated {
 375                         get { return false; }
 376                 }
 377
 378                 public bool IsLocal {
 379                         get { return IPAddress.IsLoopback (RemoteEndPoint.Address); }
 380                 }
 381
 382                 public bool IsSecureConnection {
 383                         get { return context.Connection.IsSecure; }
 384                 }
 385
 386                 public bool KeepAlive {
 387                         get {
 388                                 if (ka_set)
 389                                         return keep_alive;
 390
 391                                 ka_set = true;
 392                                 // 1. Connection header
 393                                 // 2. Protocol (1.1 == keep-alive by default)
 394                                 // 3. Keep-Alive header
 395                                 string cnc = headers ["Connection"];
 396                                 if (!String.IsNullOrEmpty (cnc)) {
 397                                         keep_alive = (0 == String.Compare (cnc, "keep-alive", StringComparison.OrdinalIgnoreCase));
 398                                 } else if (version == HttpVersion.Version11) {
 399                                         keep_alive = true;
 400                                 } else {
 401                                         cnc = headers ["keep-alive"];
 402                                         if (!String.IsNullOrEmpty (cnc))
 403                                                 keep_alive = (0 != String.Compare (cnc, "closed", StringComparison.OrdinalIgnoreCase));
 404                                 }
 405                                 return keep_alive;
 406                         }
 407                 }
 408
 409                 public IPEndPoint LocalEndPoint {
 410                         get { return context.Connection.LocalEndPoint; }
 411                 }
 412
 413                 public Version ProtocolVersion {
 414                         get { return version; }
 415                 }
 416
 417                 public NameValueCollection QueryString {
 418                         get { return query_string; }
 419                 }
 420
 421                 public string RawUrl {
 422                         get { return raw_url; }
 423                 }
 424
 425                 public IPEndPoint RemoteEndPoint {
 426                         get { return context.Connection.RemoteEndPoint; }
 427                 }
 428
 429                 [MonoTODO ("Always returns Guid.Empty")]
 430                 public Guid RequestTraceIdentifier {
 431                         get { return Guid.Empty; }
 432                 }
 433
 434                 public Uri Url {
 435                         get { return url; }
 436                 }
 437
 438                 public Uri UrlReferrer {
 439                         get { return referrer; }
 440                 }
 441
 442                 public string UserAgent {
 443                         get { return headers ["user-agent"]; }
 444                 }
 445
 446                 public string UserHostAddress {
 447                         get { return LocalEndPoint.ToString (); }
 448                 }
 449
 450                 public string UserHostName {
 451                         get { return headers ["host"]; }
 452                 }
 453
 454                 public string [] UserLanguages {
 455                         get { return user_languages; }
 456                 }
 457
 458                 public IAsyncResult BeginGetClientCertificate (AsyncCallback requestCallback, Object state)
 459                 {
 460                         return null;
 461                 }
 462 #if SECURITY_DEP
 463                 public X509Certificate2 EndGetClientCertificate (IAsyncResult asyncResult)
 464                 {
 465                         return null;
 466                         // set no_client_certificate once done.
 467                 }
 468
 469                 public X509Certificate2 GetClientCertificate ()
 470                 {
 471                         // set no_client_certificate once done.
 472
 473                         // InvalidOp if call in progress.
 474                         return null;
 475                 }
 476 #endif
 477         }
 478 }
 479 #endif
 480