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                         if (query == null || query.Length == 0) {
 113                                 query_string = new NameValueCollection (1);
 114                                 return;
 115                         }
 116
 117                         query_string = new NameValueCollection ();
 118                         if (query [0] == '?')
 119                                 query = query.Substring (1);
 120                         string [] components = query.Split ('&');
 121                         foreach (string kv in components) {
 122                                 int pos = kv.IndexOf ('=');
 123                                 if (pos == -1) {
 124                                         query_string.Add (null, HttpUtility.UrlDecode (kv));
 125                                 } else {
 126                                         string key = HttpUtility.UrlDecode (kv.Substring (0, pos));
 127                                         string val = HttpUtility.UrlDecode (kv.Substring (pos + 1));
 128
 129                                         query_string.Add (key, val);
 130                                 }
 131                         }
 132                 }
 133
 134                 internal void FinishInitialization ()
 135                 {
 136                         string host = UserHostName;
 137                         if (version > HttpVersion.Version10 && (host == null || host.Length == 0)) {
 138                                 context.ErrorMessage = "Invalid host name";
 139                                 return;
 140                         }
 141
 142                         string path;
 143                         Uri raw_uri = null;
 144                         if (Uri.MaybeUri (raw_url) && Uri.TryCreate (raw_url, UriKind.Absolute, out raw_uri))
 145                                 path = raw_uri.PathAndQuery;
 146                         else
 147                                 path = raw_url;
 148
 149                         if ((host == null || host.Length == 0))
 150                                 host = UserHostAddress;
 151
 152                         if (raw_uri != null)
 153                                 host = raw_uri.Host;
 154
 155                         int colon = host.IndexOf (':');
 156                         if (colon >= 0)
 157                                 host = host.Substring (0, colon);
 158
 159                         string base_uri = String.Format ("{0}://{1}:{2}",
 160                                                                 (IsSecureConnection) ? "https" : "http",
 161                                                                 host, LocalEndPoint.Port);
 162
 163                         if (!Uri.TryCreate (base_uri + path, UriKind.Absolute, out url)){
 164                                 context.ErrorMessage = "Invalid url: " + base_uri + path;
 165                                 return;
 166                         }
 167
 168                         CreateQueryString (url.Query);
 169
 170                         if (version >= HttpVersion.Version11) {
 171                                 string t_encoding = Headers ["Transfer-Encoding"];
 172                                 is_chunked = (t_encoding != null && String.Compare (t_encoding, "chunked", StringComparison.OrdinalIgnoreCase) == 0);
 173                                 // 'identity' is not valid!
 174                                 if (t_encoding != null && !is_chunked) {
 175                                         context.Connection.SendError (null, 501);
 176                                         return;
 177                                 }
 178                         }
 179
 180                         if (!is_chunked && !cl_set) {
 181                                 if (String.Compare (method, "POST", StringComparison.OrdinalIgnoreCase) == 0 ||
 182                                     String.Compare (method, "PUT", StringComparison.OrdinalIgnoreCase) == 0) {
 183                                         context.Connection.SendError (null, 411);
 184                                         return;
 185                                 }
 186                         }
 187
 188                         if (String.Compare (Headers ["Expect"], "100-continue", StringComparison.OrdinalIgnoreCase) == 0) {
 189                                 ResponseStream output = context.Connection.GetResponseStream ();
 190                                 output.InternalWrite (_100continue, 0, _100continue.Length);
 191                         }
 192                 }
 193
 194                 internal static string Unquote (String str) {
 195                         int start = str.IndexOf ('\"');
 196                         int end = str.LastIndexOf ('\"');
 197                         if (start >= 0 && end >=0)
 198                                 str = str.Substring (start + 1, end - 1);
 199                         return str.Trim ();
 200                 }
 201
 202                 internal void AddHeader (string header)
 203                 {
 204                         int colon = header.IndexOf (':');
 205                         if (colon == -1 || colon == 0) {
 206                                 context.ErrorMessage = "Bad Request";
 207                                 context.ErrorStatus = 400;
 208                                 return;
 209                         }
 210
 211                         string name = header.Substring (0, colon).Trim ();
 212                         string val = header.Substring (colon + 1).Trim ();
 213                         string lower = name.ToLower (CultureInfo.InvariantCulture);
 214                         headers.SetInternal (name, val);
 215                         switch (lower) {
 216                                 case "accept-language":
 217                                         user_languages = val.Split (','); // yes, only split with a ','
 218                                         break;
 219                                 case "accept":
 220                                         accept_types = val.Split (','); // yes, only split with a ','
 221                                         break;
 222                                 case "content-length":
 223                                         try {
 224                                                 //TODO: max. content_length?
 225                                                 content_length = Int64.Parse (val.Trim ());
 226                                                 if (content_length < 0)
 227                                                         context.ErrorMessage = "Invalid Content-Length.";
 228                                                 cl_set = true;
 229                                         } catch {
 230                                                 context.ErrorMessage = "Invalid Content-Length.";
 231                                         }
 232
 233                                         break;
 234                                 case "referer":
 235                                         try {
 236                                                 referrer = new Uri (val);
 237                                         } catch {
 238                                                 referrer = new Uri ("http://someone.is.screwing.with.the.headers.com/");
 239                                         }
 240                                         break;
 241                                 case "cookie":
 242                                         if (cookies == null)
 243                                                 cookies = new CookieCollection();
 244
 245                                         string[] cookieStrings = val.Split(new char[] {',', ';'});
 246                                         Cookie current = null;
 247                                         int version = 0;
 248                                         foreach (string cookieString in cookieStrings) {
 249                                                 string str = cookieString.Trim ();
 250                                                 if (str.Length == 0)
 251                                                         continue;
 252                                                 if (str.StartsWith ("$Version")) {
 253                                                         version = Int32.Parse (Unquote (str.Substring (str.IndexOf ('=') + 1)));
 254                                                 } else if (str.StartsWith ("$Path")) {
 255                                                         if (current != null)
 256                                                                 current.Path = str.Substring (str.IndexOf ('=') + 1).Trim ();
 257                                                 } else if (str.StartsWith ("$Domain")) {
 258                                                         if (current != null)
 259                                                                 current.Domain = str.Substring (str.IndexOf ('=') + 1).Trim ();
 260                                                 } else if (str.StartsWith ("$Port")) {
 261                                                         if (current != null)
 262                                                                 current.Port = str.Substring (str.IndexOf ('=') + 1).Trim ();
 263                                                 } else {
 264                                                         if (current != null) {
 265                                                                 cookies.Add (current);
 266                                                         }
 267                                                         current = new Cookie ();
 268                                                         int idx = str.IndexOf ('=');
 269                                                         if (idx > 0) {
 270                                                                 current.Name = str.Substring (0, idx).Trim ();
 271                                                                 current.Value =  str.Substring (idx + 1).Trim ();
 272                                                         } else {
 273                                                                 current.Name = str.Trim ();
 274                                                                 current.Value = String.Empty;
 275                                                         }
 276                                                         current.Version = version;
 277                                                 }
 278                                         }
 279                                         if (current != null) {
 280                                                 cookies.Add (current);
 281                                         }
 282                                         break;
 283                         }
 284                 }
 285
 286                 // returns true is the stream could be reused.
 287                 internal bool FlushInput ()
 288                 {
 289                         if (!HasEntityBody)
 290                                 return true;
 291
 292                         int length = 2048;
 293                         if (content_length > 0)
 294                                 length = (int) Math.Min (content_length, (long) length);
 295
 296                         byte [] bytes = new byte [length];
 297                         while (true) {
 298                                 // TODO: test if MS has a timeout when doing this
 299                                 try {
 300                                         IAsyncResult ares = InputStream.BeginRead (bytes, 0, length, null, null);
 301                                         if (!ares.IsCompleted && !ares.AsyncWaitHandle.WaitOne (100))
 302                                                 return false;
 303                                         if (InputStream.EndRead (ares) <= 0)
 304                                                 return true;
 305                                 } catch {
 306                                         return false;
 307                                 }
 308                         }
 309                 }
 310
 311                 public string [] AcceptTypes {
 312                         get { return accept_types; }
 313                 }
 314
 315                 [MonoTODO ("Always returns 0")]
 316                 public int ClientCertificateError {
 317                         get {
 318 /*
 319                                 if (no_get_certificate)
 320                                         throw new InvalidOperationException (
 321                                                 "Call GetClientCertificate() before calling this method.");
 322                                 return client_cert_error;
 323 */
 324                                 return 0;
 325                         }
 326                 }
 327
 328                 public Encoding ContentEncoding {
 329                         get {
 330                                 if (content_encoding == null)
 331                                         content_encoding = Encoding.Default;
 332                                 return content_encoding;
 333                         }
 334                 }
 335
 336                 public long ContentLength64 {
 337                         get { return content_length; }
 338                 }
 339
 340                 public string ContentType {
 341                         get { return headers ["content-type"]; }
 342                 }
 343
 344                 public CookieCollection Cookies {
 345                         get {
 346                                 // TODO: check if the collection is read-only
 347                                 if (cookies == null)
 348                                         cookies = new CookieCollection ();
 349                                 return cookies;
 350                         }
 351                 }
 352
 353                 public bool HasEntityBody {
 354                         get { return (content_length > 0 || is_chunked); }
 355                 }
 356
 357                 public NameValueCollection Headers {
 358                         get { return headers; }
 359                 }
 360
 361                 public string HttpMethod {
 362                         get { return method; }
 363                 }
 364
 365                 public Stream InputStream {
 366                         get {
 367                                 if (input_stream == null) {
 368                                         if (is_chunked || content_length > 0)
 369                                                 input_stream = context.Connection.GetRequestStream (is_chunked, content_length);
 370                                         else
 371                                                 input_stream = Stream.Null;
 372                                 }
 373
 374                                 return input_stream;
 375                         }
 376                 }
 377
 378                 [MonoTODO ("Always returns false")]
 379                 public bool IsAuthenticated {
 380                         get { return false; }
 381                 }
 382
 383                 public bool IsLocal {
 384                         get { return IPAddress.IsLoopback (RemoteEndPoint.Address); }
 385                 }
 386
 387                 public bool IsSecureConnection {
 388                         get { return context.Connection.IsSecure; }
 389                 }
 390
 391                 public bool KeepAlive {
 392                         get {
 393                                 if (ka_set)
 394                                         return keep_alive;
 395
 396                                 ka_set = true;
 397                                 // 1. Connection header
 398                                 // 2. Protocol (1.1 == keep-alive by default)
 399                                 // 3. Keep-Alive header
 400                                 string cnc = headers ["Connection"];
 401                                 if (!String.IsNullOrEmpty (cnc)) {
 402                                         keep_alive = (0 == String.Compare (cnc, "keep-alive", StringComparison.OrdinalIgnoreCase));
 403                                 } else if (version == HttpVersion.Version11) {
 404                                         keep_alive = true;
 405                                 } else {
 406                                         cnc = headers ["keep-alive"];
 407                                         if (!String.IsNullOrEmpty (cnc))
 408                                                 keep_alive = (0 != String.Compare (cnc, "closed", StringComparison.OrdinalIgnoreCase));
 409                                 }
 410                                 return keep_alive;
 411                         }
 412                 }
 413
 414                 public IPEndPoint LocalEndPoint {
 415                         get { return context.Connection.LocalEndPoint; }
 416                 }
 417
 418                 public Version ProtocolVersion {
 419                         get { return version; }
 420                 }
 421
 422                 public NameValueCollection QueryString {
 423                         get { return query_string; }
 424                 }
 425
 426                 public string RawUrl {
 427                         get { return raw_url; }
 428                 }
 429
 430                 public IPEndPoint RemoteEndPoint {
 431                         get { return context.Connection.RemoteEndPoint; }
 432                 }
 433
 434                 [MonoTODO ("Always returns Guid.Empty")]
 435                 public Guid RequestTraceIdentifier {
 436                         get { return Guid.Empty; }
 437                 }
 438
 439                 public Uri Url {
 440                         get { return url; }
 441                 }
 442
 443                 public Uri UrlReferrer {
 444                         get { return referrer; }
 445                 }
 446
 447                 public string UserAgent {
 448                         get { return headers ["user-agent"]; }
 449                 }
 450
 451                 public string UserHostAddress {
 452                         get { return LocalEndPoint.ToString (); }
 453                 }
 454
 455                 public string UserHostName {
 456                         get { return headers ["host"]; }
 457                 }
 458
 459                 public string [] UserLanguages {
 460                         get { return user_languages; }
 461                 }
 462
 463                 public IAsyncResult BeginGetClientCertificate (AsyncCallback requestCallback, Object state)
 464                 {
 465                         return null;
 466                 }
 467 #if SECURITY_DEP
 468                 public X509Certificate2 EndGetClientCertificate (IAsyncResult asyncResult)
 469                 {
 470                         return null;
 471                         // set no_client_certificate once done.
 472                 }
 473
 474                 public X509Certificate2 GetClientCertificate ()
 475                 {
 476                         // set no_client_certificate once done.
 477
 478                         // InvalidOp if call in progress.
 479                         return null;
 480                 }
 481 #endif
 482         }
 483 }
 484 #endif
 485