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                 Guid identifier;
  54                 Uri url;
  55                 Uri referrer;
  56                 string [] user_languages;
  57                 HttpListenerContext context;
  58                 bool is_chunked;
  59                 static byte [] _100continue = Encoding.ASCII.GetBytes ("HTTP/1.1 100 Continue\r\n\r\n");
  60                 static readonly string [] no_body_methods = new string [] {
  61                         "GET", "HEAD", "DELETE" };
  62
  63                 internal HttpListenerRequest (HttpListenerContext context)
  64                 {
  65                         this.context = context;
  66                         headers = new WebHeaderCollection ();
  67                         input_stream = Stream.Null;
  68                         version = HttpVersion.Version10;
  69                 }
  70
  71                 static char [] separators = new char [] { ' ' };
  72
  73                 internal void SetRequestLine (string req)
  74                 {
  75                         string [] parts = req.Split (separators, 3);
  76                         if (parts.Length != 3) {
  77                                 context.ErrorMessage = "Invalid request line (parts).";
  78                                 return;
  79                         }
  80
  81                         method = parts [0];
  82                         foreach (char c in method){
  83                                 int ic = (int) c;
  84
  85                                 if ((ic >= 'A' && ic <= 'Z') ||
  86                                     (ic > 32 && c < 127 && c != '(' && c != ')' && c != '<' &&
  87                                      c != '<' && c != '>' && c != '@' && c != ',' && c != ';' &&
  88                                      c != ':' && c != '\\' && c != '"' && c != '/' && c != '[' &&
  89                                      c != ']' && c != '?' && c != '=' && c != '{' && c != '}'))
  90                                         continue;
  91
  92                                 context.ErrorMessage = "(Invalid verb)";
  93                                 return;
  94                         }
  95
  96                         raw_url = parts [1];
  97                         if (parts [2].Length != 8 || !parts [2].StartsWith ("HTTP/")) {
  98                                 context.ErrorMessage = "Invalid request line (version).";
  99                                 return;
 100                         }
 101
 102                         try {
 103                                 version = new Version (parts [2].Substring (5));
 104                                 if (version.Major < 1)
 105                                         throw new Exception ();
 106                         } catch {
 107                                 context.ErrorMessage = "Invalid request line (version).";
 108                                 return;
 109                         }
 110                 }
 111
 112                 void CreateQueryString (string query)
 113                 {
 114                         query_string = new NameValueCollection ();
 115                         if (query == null || query.Length == 0)
 116                                 return;
 117
 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;
 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,
 162                                                                 LocalEndPoint.Port);
 163
 164                         if (!Uri.TryCreate (base_uri + path, UriKind.Absolute, out url)){
 165                                 context.ErrorMessage = "Invalid url: " + base_uri + path;
 166                                 return;
 167                         }
 168
 169                         CreateQueryString (url.Query);
 170
 171                         string t_encoding = null;
 172                         if (version >= HttpVersion.Version11) {
 173                                 t_encoding = Headers ["Transfer-Encoding"];
 174                                 // 'identity' is not valid!
 175                                 if (t_encoding != null && t_encoding != "chunked") {
 176                                         context.Connection.SendError (null, 501);
 177                                         return;
 178                                 }
 179                         }
 180
 181                         is_chunked = (t_encoding == "chunked");
 182
 183                         foreach (string m in no_body_methods)
 184                                 if (string.Compare (method, m, StringComparison.InvariantCultureIgnoreCase) == 0)
 185                                         return;
 186
 187                         if (!is_chunked && !cl_set) {
 188                                 context.Connection.SendError (null, 411);
 189                                 return;
 190                         }
 191
 192                         if (is_chunked || content_length > 0) {
 193                                 input_stream = context.Connection.GetRequestStream (is_chunked, content_length);
 194                         }
 195
 196                         if (Headers ["Expect"] == "100-continue") {
 197                                 ResponseStream output = context.Connection.GetResponseStream ();
 198                                 output.InternalWrite (_100continue, 0, _100continue.Length);
 199                         }
 200                 }
 201
 202                 internal static string Unquote (String str) {
 203                         int start = str.IndexOf ('\"');
 204                         int end = str.LastIndexOf ('\"');
 205                         if (start >= 0 && end >=0)
 206                                 str = str.Substring (start + 1, end - 1);
 207                         return str.Trim ();
 208                 }
 209
 210                 internal void AddHeader (string header)
 211                 {
 212                         int colon = header.IndexOf (':');
 213                         if (colon == -1 || colon == 0) {
 214                                 context.ErrorMessage = "Bad Request";
 215                                 context.ErrorStatus = 400;
 216                                 return;
 217                         }
 218
 219                         string name = header.Substring (0, colon).Trim ();
 220                         string val = header.Substring (colon + 1).Trim ();
 221                         string lower = name.ToLower (CultureInfo.InvariantCulture);
 222                         headers.SetInternal (name, val);
 223                         switch (lower) {
 224                                 case "accept-language":
 225                                         user_languages = val.Split (','); // yes, only split with a ','
 226                                         break;
 227                                 case "accept":
 228                                         accept_types = val.Split (','); // yes, only split with a ','
 229                                         break;
 230                                 case "content-length":
 231                                         try {
 232                                                 //TODO: max. content_length?
 233                                                 content_length = Int64.Parse (val.Trim ());
 234                                                 if (content_length < 0)
 235                                                         context.ErrorMessage = "Invalid Content-Length.";
 236                                                 cl_set = true;
 237                                         } catch {
 238                                                 context.ErrorMessage = "Invalid Content-Length.";
 239                                         }
 240
 241                                         break;
 242                                 case "referer":
 243                                         try {
 244                                                 referrer = new Uri (val);
 245                                         } catch {
 246                                                 referrer = new Uri ("http://someone.is.screwing.with.the.headers.com/");
 247                                         }
 248                                         break;
 249                                 case "cookie":
 250                                         if (cookies == null)
 251                                                 cookies = new CookieCollection();
 252
 253                                         string[] cookieStrings = val.Split(new char[] {',', ';'});
 254                                         Cookie current = null;
 255                                         int version = 0;
 256                                         foreach (string cookieString in cookieStrings) {
 257                                                 string str = cookieString.Trim ();
 258                                                 if (str.Length == 0)
 259                                                         continue;
 260                                                 if (str.StartsWith ("$Version")) {
 261                                                         version = Int32.Parse (Unquote (str.Substring (str.IndexOf ("=") + 1)));
 262                                                 } else if (str.StartsWith ("$Path")) {
 263                                                         if (current != null)
 264                                                                 current.Path = str.Substring (str.IndexOf ("=") + 1).Trim ();
 265                                                 } else if (str.StartsWith ("$Domain")) {
 266                                                         if (current != null)
 267                                                                 current.Domain = str.Substring (str.IndexOf ("=") + 1).Trim ();
 268                                                 } else if (str.StartsWith ("$Port")) {
 269                                                         if (current != null)
 270                                                                 current.Port = str.Substring (str.IndexOf ("=") + 1).Trim ();
 271                                                 } else {
 272                                                         if (current != null) {
 273                                                                 cookies.Add (current);
 274                                                         }
 275                                                         current = new Cookie ();
 276                                                         int idx = str.IndexOf ("=");
 277                                                         if (idx > 0) {
 278                                                                 current.Name = str.Substring (0, idx).Trim ();
 279                                                                 current.Value =  str.Substring (idx + 1).Trim ();
 280                                                         } else {
 281                                                                 current.Name = str.Trim ();
 282                                                                 current.Value = String.Empty;
 283                                                         }
 284                                                         current.Version = version;
 285                                                 }
 286                                         }
 287                                         if (current != null) {
 288                                                 cookies.Add (current);
 289                                         }
 290                                         break;
 291                         }
 292                 }
 293
 294                 // returns true is the stream could be reused.
 295                 internal bool FlushInput ()
 296                 {
 297                         if (!HasEntityBody)
 298                                 return true;
 299
 300                         int length = 2048;
 301                         if (content_length > 0)
 302                                 length = (int) Math.Min (content_length, (long) length);
 303
 304                         byte [] bytes = new byte [length];
 305                         while (true) {
 306                                 // TODO: test if MS has a timeout when doing this
 307                                 try {
 308                                         if (InputStream.Read (bytes, 0, length) <= 0)
 309                                                 return true;
 310                                 } catch {
 311                                         return false;
 312                                 }
 313                         }
 314                 }
 315
 316                 public string [] AcceptTypes {
 317                         get { return accept_types; }
 318                 }
 319
 320                 [MonoTODO ("Always returns 0")]
 321                 public int ClientCertificateError {
 322                         get {
 323 /*
 324                                 if (no_get_certificate)
 325                                         throw new InvalidOperationException (
 326                                                 "Call GetClientCertificate() before calling this method.");
 327                                 return client_cert_error;
 328 */
 329                                 return 0;
 330                         }
 331                 }
 332
 333                 public Encoding ContentEncoding {
 334                         get {
 335                                 if (content_encoding == null)
 336                                         content_encoding = Encoding.Default;
 337                                 return content_encoding;
 338                         }
 339                 }
 340
 341                 public long ContentLength64 {
 342                         get { return content_length; }
 343                 }
 344
 345                 public string ContentType {
 346                         get { return headers ["content-type"]; }
 347                 }
 348
 349                 public CookieCollection Cookies {
 350                         get {
 351                                 // TODO: check if the collection is read-only
 352                                 if (cookies == null)
 353                                         cookies = new CookieCollection ();
 354                                 return cookies;
 355                         }
 356                 }
 357
 358                 public bool HasEntityBody {
 359                         get { return (content_length > 0 || is_chunked); }
 360                 }
 361
 362                 public NameValueCollection Headers {
 363                         get { return headers; }
 364                 }
 365
 366                 public string HttpMethod {
 367                         get { return method; }
 368                 }
 369
 370                 public Stream InputStream {
 371                         get { return input_stream; }
 372                 }
 373
 374                 [MonoTODO ("Always returns false")]
 375                 public bool IsAuthenticated {
 376                         get { return false; }
 377                 }
 378
 379                 public bool IsLocal {
 380                         get { return IPAddress.IsLoopback (RemoteEndPoint.Address); }
 381                 }
 382
 383                 public bool IsSecureConnection {
 384                         get { return context.Connection.IsSecure; }
 385                 }
 386
 387                 public bool KeepAlive {
 388                         get { return false; }
 389                 }
 390
 391                 public IPEndPoint LocalEndPoint {
 392                         get { return context.Connection.LocalEndPoint; }
 393                 }
 394
 395                 public Version ProtocolVersion {
 396                         get { return version; }
 397                 }
 398
 399                 public NameValueCollection QueryString {
 400                         get { return query_string; }
 401                 }
 402
 403                 public string RawUrl {
 404                         get { return raw_url; }
 405                 }
 406
 407                 public IPEndPoint RemoteEndPoint {
 408                         get { return context.Connection.RemoteEndPoint; }
 409                 }
 410
 411                 public Guid RequestTraceIdentifier {
 412                         get { return identifier; }
 413                 }
 414
 415                 public Uri Url {
 416                         get { return url; }
 417                 }
 418
 419                 public Uri UrlReferrer {
 420                         get { return referrer; }
 421                 }
 422
 423                 public string UserAgent {
 424                         get { return headers ["user-agent"]; }
 425                 }
 426
 427                 public string UserHostAddress {
 428                         get { return LocalEndPoint.ToString (); }
 429                 }
 430
 431                 public string UserHostName {
 432                         get { return headers ["host"]; }
 433                 }
 434
 435                 public string [] UserLanguages {
 436                         get { return user_languages; }
 437                 }
 438
 439                 public IAsyncResult BeginGetClientCertificate (AsyncCallback requestCallback, Object state)
 440                 {
 441                         return null;
 442                 }
 443 #if SECURITY_DEP
 444                 public X509Certificate2 EndGetClientCertificate (IAsyncResult asyncResult)
 445                 {
 446                         return null;
 447                         // set no_client_certificate once done.
 448                 }
 449
 450                 public X509Certificate2 GetClientCertificate ()
 451                 {
 452                         // set no_client_certificate once done.
 453
 454                         // InvalidOp if call in progress.
 455                         return null;
 456                 }
 457 #endif
 458         }
 459 }
 460 #endif
 461