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                 Encoding content_encoding;
  43                 long content_length;
  44                 bool cl_set;
  45                 CookieCollection cookies;
  46                 WebHeaderCollection headers;
  47                 string method;
  48                 Stream input_stream;
  49                 bool is_authenticated;
  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                 bool no_get_certificate;
  58                 HttpListenerContext context;
  59                 bool is_chunked;
  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                         input_stream = Stream.Null;
  67                 }
  68
  69                 static char [] separators = new char [] { ' ' };
  70
  71 #if false
  72                 static readonly string [] methods = new string [] { "GET", "POST", "HEAD",
  73                                                                 "PUT", "CONNECT", "MKCOL" };
  74 #endif
  75                 internal void SetRequestLine (string req)
  76                 {
  77                         string [] parts = req.Split (separators, 3);
  78                         if (parts.Length != 3) {
  79                                 context.ErrorMessage = "Invalid request line (parts).";
  80                                 return;
  81                         }
  82
  83                         method = parts [0];
  84                         foreach (char c in method){
  85                                 int ic = (int) c;
  86
  87                                 if ((ic >= 'A' && ic <= 'Z') ||
  88                                     (ic >= 'a' && ic <= 'z') ||
  89                                     (ic > 32 && c < 127 && c != '(' && c != ')' && c != '<' &&
  90                                      c != '<' && c != '>' && c != '@' && c != ',' && c != ';' &&
  91                                      c != ':' && c != '\\' && c != '"' && c != '/' && c != '[' &&
  92                                      c != ']' && c != '?' && c != '=' && c != '{' && c != '}'))
  93                                         continue;
  94
  95                                 context.ErrorMessage = "(Invalid verb)";
  96                                 return;
  97                         }
  98
  99 #if false
 100                         //
 101                         // According to bug #80504 we should allow any verbs to go
 102                         // through.
 103                         //
 104                         if (Array.IndexOf (methods, method) == -1) {
 105                                 context.ErrorMessage = "Invalid request line (verb).";
 106                                 return;
 107                         }
 108 #endif
 109
 110                         raw_url = parts [1];
 111                         if (parts [2].Length != 8 || !parts [2].StartsWith ("HTTP/")) {
 112                                 context.ErrorMessage = "Invalid request line (version).";
 113                                 return;
 114                         }
 115
 116                         try {
 117                                 version = new Version (parts [2].Substring (5));
 118                                 if (version.Major < 1)
 119                                         throw new Exception ();
 120                         } catch {
 121                                 context.ErrorMessage = "Invalid request line (version).";
 122                                 return;
 123                         }
 124                 }
 125
 126                 void CreateQueryString (string query)
 127                 {
 128                         query_string = new NameValueCollection ();
 129                         if (query == null || query.Length == 0)
 130                                 return;
 131
 132                         if (query [0] == '?')
 133                                 query = query.Substring (1);
 134                         string [] components = query.Split ('&');
 135                         foreach (string kv in components) {
 136                                 int pos = kv.IndexOf ('=');
 137                                 if (pos == -1) {
 138                                         query_string.Add (null, HttpUtility.UrlDecode (kv));
 139                                 } else {
 140                                         string key = HttpUtility.UrlDecode (kv.Substring (0, pos));
 141                                         string val = HttpUtility.UrlDecode (kv.Substring (pos + 1));
 142
 143                                         query_string.Add (key, val);
 144                                 }
 145                         }
 146                 }
 147
 148                 internal void FinishInitialization ()
 149                 {
 150                         string host = UserHostName;
 151                         if (version > HttpVersion.Version10 && (host == null || host == "")) {
 152                                 context.ErrorMessage = "Invalid host name";
 153                                 return;
 154                         }
 155
 156                         if (host == null || host == "")
 157                                 host = UserHostAddress;
 158
 159                         int colon = host.IndexOf (':');
 160                         if (colon >= 0)
 161                                 host = host.Substring (0, colon);
 162
 163                         string base_uri = String.Format ("{0}://{1}:{2}",
 164                                                                 (IsSecureConnection) ? "https" : "http",
 165                                                                 host,
 166                                                                 LocalEndPoint.Port);
 167                         try {
 168                                 url = new Uri (base_uri + raw_url);
 169                         } catch {
 170                                 context.ErrorMessage = "Invalid url";
 171                                 return;
 172                         }
 173
 174                         CreateQueryString (url.Query);
 175
 176                         if (method == "GET" || method == "HEAD")
 177                                 return;
 178
 179                         string t_encoding = null;
 180                         if (version >= HttpVersion.Version11) {
 181                                 t_encoding = Headers ["Transfer-Encoding"];
 182                                 // 'identity' is not valid!
 183                                 if (t_encoding != null && t_encoding != "chunked") {
 184                                         context.Connection.SendError (null, 501);
 185                                         return;
 186                                 }
 187                         }
 188
 189                         bool is_chunked = (t_encoding == "chunked");
 190                         if (!is_chunked && !cl_set) {
 191                                 context.Connection.SendError (null, 411);
 192                                 return;
 193                         }
 194
 195                         if (is_chunked || content_length > 0) {
 196                                 input_stream = context.Connection.GetRequestStream (is_chunked, content_length);
 197                         }
 198
 199                         if (Headers ["Expect"] == "100-continue") {
 200                                 ResponseStream output = context.Connection.GetResponseStream ();
 201                                 output.InternalWrite (_100continue, 0, _100continue.Length);
 202                         }
 203                 }
 204
 205                 internal void AddHeader (string header)
 206                 {
 207                         int colon = header.IndexOf (':');
 208                         if (colon == -1 || colon == 0) {
 209                                 context.ErrorMessage = "Bad Request";
 210                                 return;
 211                         }
 212
 213                         string name = header.Substring (0, colon).Trim ();
 214                         string val = header.Substring (colon + 1).Trim ();
 215                         string lower = name.ToLower (CultureInfo.InvariantCulture);
 216                         headers.SetInternal (name, val);
 217                         switch (lower) {
 218                                 case "accept-language":
 219                                         user_languages = val.Split (','); // yes, only split with a ','
 220                                         break;
 221                                 case "accept":
 222                                         accept_types = val.Split (','); // yes, only split with a ','
 223                                         break;
 224                                 case "content-length":
 225                                         try {
 226                                                 //TODO: max. content_length?
 227                                                 content_length = Int64.Parse (val.Trim ());
 228                                                 if (content_length < 0)
 229                                                         context.ErrorMessage = "Invalid Content-Length.";
 230                                                 cl_set = true;
 231                                         } catch {
 232                                                 context.ErrorMessage = "Invalid Content-Length.";
 233                                         }
 234
 235                                         break;
 236                                 case "referer":
 237                                         try {
 238                                                 referrer = new Uri (val);
 239                                         } catch {
 240                                                 referrer = new Uri ("http://someone.is.screwing.with.the.headers.com/");
 241                                         }
 242                                         break;
 243                                 //TODO: cookie headers
 244                         }
 245                 }
 246
 247                 public string [] AcceptTypes {
 248                         get { return accept_types; }
 249                 }
 250
 251                 public int ClientCertificateError {
 252                         get {
 253                                 if (no_get_certificate)
 254                                         throw new InvalidOperationException (
 255                                                 "Call GetClientCertificate() before calling this method.");
 256                                 return client_cert_error;
 257                         }
 258                 }
 259
 260                 public Encoding ContentEncoding {
 261                         get {
 262                                 if (content_encoding == null)
 263                                         content_encoding = Encoding.Default;
 264                                 return content_encoding;
 265                         }
 266                 }
 267
 268                 public long ContentLength64 {
 269                         get { return content_length; }
 270                 }
 271
 272                 public string ContentType {
 273                         get { return headers ["content-type"]; }
 274                 }
 275
 276                 public CookieCollection Cookies {
 277                         get {
 278                                 // TODO: check if the collection is read-only
 279                                 if (cookies == null)
 280                                         cookies = new CookieCollection ();
 281                                 return cookies;
 282                         }
 283                 }
 284
 285                 public bool HasEntityBody {
 286                         get { return (method == "GET" || method == "HEAD" || content_length <= 0 || is_chunked); }
 287                 }
 288
 289                 public NameValueCollection Headers {
 290                         get { return headers; }
 291                 }
 292
 293                 public string HttpMethod {
 294                         get { return method; }
 295                 }
 296
 297                 public Stream InputStream {
 298                         get { return input_stream; }
 299                 }
 300
 301                 public bool IsAuthenticated {
 302                         get { return is_authenticated; }
 303                 }
 304
 305                 public bool IsLocal {
 306                         get { return IPAddress.IsLoopback (RemoteEndPoint.Address); }
 307                 }
 308
 309                 public bool IsSecureConnection {
 310                         get { return context.Connection.IsSecure; }
 311                 }
 312
 313                 public bool KeepAlive {
 314                         get { return false; }
 315                 }
 316
 317                 public IPEndPoint LocalEndPoint {
 318                         get { return context.Connection.LocalEndPoint; }
 319                 }
 320
 321                 public Version ProtocolVersion {
 322                         get { return version; }
 323                 }
 324
 325                 public NameValueCollection QueryString {
 326                         get { return query_string; }
 327                 }
 328
 329                 public string RawUrl {
 330                         get { return raw_url; }
 331                 }
 332
 333                 public IPEndPoint RemoteEndPoint {
 334                         get { return context.Connection.RemoteEndPoint; }
 335                 }
 336
 337                 public Guid RequestTraceIdentifier {
 338                         get { return identifier; }
 339                 }
 340
 341                 public Uri Url {
 342                         get { return url; }
 343                 }
 344
 345                 public Uri UrlReferrer {
 346                         get { return referrer; }
 347                 }
 348
 349                 public string UserAgent {
 350                         get { return headers ["user-agent"]; }
 351                 }
 352
 353                 public string UserHostAddress {
 354                         get { return LocalEndPoint.ToString (); }
 355                 }
 356
 357                 public string UserHostName {
 358                         get { return headers ["host"]; }
 359                 }
 360
 361                 public string [] UserLanguages {
 362                         get { return user_languages; }
 363                 }
 364
 365                 public IAsyncResult BeginGetClientCertificate (AsyncCallback requestCallback, Object state)
 366                 {
 367                         return null;
 368                 }
 369 #if SECURITY_DEP
 370                 public X509Certificate2 EndGetClientCertificate (IAsyncResult asyncResult)
 371                 {
 372                         return null;
 373                         // set no_client_certificate once done.
 374                 }
 375
 376                 public X509Certificate2 GetClientCertificate ()
 377                 {
 378                         // set no_client_certificate once done.
 379
 380                         // InvalidOp if call in progress.
 381                         return null;
 382                 }
 383 #endif
 384         }
 385 }
 386 #endif
 387