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].ToUpperInvariant ();
  84                         foreach (char c in method){
  85                                 int ic = (int) c;
  86
  87                                 if ((ic >= 'A' && ic <= 'Z') ||
  88                                     (ic > 32 && c < 127 && c != '(' && c != ')' && c != '<' &&
  89                                      c != '<' && c != '>' && c != '@' && c != ',' && c != ';' &&
  90                                      c != ':' && c != '\\' && c != '"' && c != '/' && c != '[' &&
  91                                      c != ']' && c != '?' && c != '=' && c != '{' && c != '}'))
  92                                         continue;
  93
  94                                 context.ErrorMessage = "(Invalid verb)";
  95                                 return;
  96                         }
  97
  98 #if false
  99                         //
 100                         // According to bug #80504 we should allow any verbs to go
 101                         // through.
 102                         //
 103                         if (Array.IndexOf (methods, method) == -1) {
 104                                 context.ErrorMessage = "Invalid request line (verb).";
 105                                 return;
 106                         }
 107 #endif
 108
 109                         raw_url = parts [1];
 110                         if (parts [2].Length != 8 || !parts [2].StartsWith ("HTTP/")) {
 111                                 context.ErrorMessage = "Invalid request line (version).";
 112                                 return;
 113                         }
 114
 115                         try {
 116                                 version = new Version (parts [2].Substring (5));
 117                                 if (version.Major < 1)
 118                                         throw new Exception ();
 119                         } catch {
 120                                 context.ErrorMessage = "Invalid request line (version).";
 121                                 return;
 122                         }
 123                 }
 124
 125                 void CreateQueryString (string query)
 126                 {
 127                         query_string = new NameValueCollection ();
 128                         if (query == null || query.Length == 0)
 129                                 return;
 130
 131                         if (query [0] == '?')
 132                                 query = query.Substring (1);
 133                         string [] components = query.Split ('&');
 134                         foreach (string kv in components) {
 135                                 int pos = kv.IndexOf ('=');
 136                                 if (pos == -1) {
 137                                         query_string.Add (null, HttpUtility.UrlDecode (kv));
 138                                 } else {
 139                                         string key = HttpUtility.UrlDecode (kv.Substring (0, pos));
 140                                         string val = HttpUtility.UrlDecode (kv.Substring (pos + 1));
 141
 142                                         query_string.Add (key, val);
 143                                 }
 144                         }
 145                 }
 146
 147                 internal void FinishInitialization ()
 148                 {
 149                         string host = UserHostName;
 150                         if (version > HttpVersion.Version10 && (host == null || host == "")) {
 151                                 context.ErrorMessage = "Invalid host name";
 152                                 return;
 153                         }
 154
 155                         if (host == null || host == "")
 156                                 host = UserHostAddress;
 157
 158                         int colon = host.IndexOf (':');
 159                         if (colon >= 0)
 160                                 host = host.Substring (0, colon);
 161
 162                         string base_uri = String.Format ("{0}://{1}:{2}",
 163                                                                 (IsSecureConnection) ? "https" : "http",
 164                                                                 host,
 165                                                                 LocalEndPoint.Port);
 166                         try {
 167                                 url = new Uri (base_uri + raw_url);
 168                         } catch {
 169                                 context.ErrorMessage = "Invalid url";
 170                                 return;
 171                         }
 172
 173                         CreateQueryString (url.Query);
 174
 175                         if (method == "GET" || method == "HEAD" || method == "DELETE")
 176                                 return;
 177
 178                         string t_encoding = null;
 179                         if (version >= HttpVersion.Version11) {
 180                                 t_encoding = Headers ["Transfer-Encoding"];
 181                                 // 'identity' is not valid!
 182                                 if (t_encoding != null && t_encoding != "chunked") {
 183                                         context.Connection.SendError (null, 501);
 184                                         return;
 185                                 }
 186                         }
 187
 188                         bool is_chunked = (t_encoding == "chunked");
 189                         if (!is_chunked && !cl_set) {
 190                                 context.Connection.SendError (null, 411);
 191                                 return;
 192                         }
 193
 194                         if (is_chunked || content_length > 0) {
 195                                 input_stream = context.Connection.GetRequestStream (is_chunked, content_length);
 196                         }
 197
 198                         if (Headers ["Expect"] == "100-continue") {
 199                                 ResponseStream output = context.Connection.GetResponseStream ();
 200                                 output.InternalWrite (_100continue, 0, _100continue.Length);
 201                         }
 202                 }
 203
 204                 internal static string Unquote (String str) {
 205                         int start = str.IndexOf ('\"');
 206                         int end = str.LastIndexOf ('\"');
 207                         if (start >= 0 && end >=0)
 208                                 str = str.Substring (start + 1, end - 1);
 209                         return str.Trim ();
 210                 }
 211
 212                 internal void AddHeader (string header)
 213                 {
 214                         int colon = header.IndexOf (':');
 215                         if (colon == -1 || colon == 0) {
 216                                 context.ErrorMessage = "Bad Request";
 217                                 return;
 218                         }
 219
 220                         string name = header.Substring (0, colon).Trim ();
 221                         string val = header.Substring (colon + 1).Trim ();
 222                         string lower = name.ToLower (CultureInfo.InvariantCulture);
 223                         headers.SetInternal (name, val);
 224                         switch (lower) {
 225                                 case "accept-language":
 226                                         user_languages = val.Split (','); // yes, only split with a ','
 227                                         break;
 228                                 case "accept":
 229                                         accept_types = val.Split (','); // yes, only split with a ','
 230                                         break;
 231                                 case "content-length":
 232                                         try {
 233                                                 //TODO: max. content_length?
 234                                                 content_length = Int64.Parse (val.Trim ());
 235                                                 if (content_length < 0)
 236                                                         context.ErrorMessage = "Invalid Content-Length.";
 237                                                 cl_set = true;
 238                                         } catch {
 239                                                 context.ErrorMessage = "Invalid Content-Length.";
 240                                         }
 241
 242                                         break;
 243                                 case "referer":
 244                                         try {
 245                                                 referrer = new Uri (val);
 246                                         } catch {
 247                                                 referrer = new Uri ("http://someone.is.screwing.with.the.headers.com/");
 248                                         }
 249                                         break;
 250                                 case "cookie":
 251                                         if (cookies == null)
 252                                                 cookies = new CookieCollection();
 253
 254                                         string[] cookieStrings = val.Split(new char[] {',', ';'});
 255                                         Cookie current = null;
 256                                         int version = 0;
 257                                         foreach (string cookieString in cookieStrings) {
 258                                                 string str = cookieString.Trim ();
 259                                                 if (str.Length == 0)
 260                                                         continue;
 261                                                 if (str.StartsWith ("$Version")) {
 262                                                         version = Int32.Parse (Unquote (str.Substring (str.IndexOf ("=") + 1)));
 263                                                 } else if (str.StartsWith ("$Path")) {
 264                                                         if (current != null)
 265                                                                 current.Path = str.Substring (str.IndexOf ("=") + 1).Trim ();
 266                                                 } else if (str.StartsWith ("$Domain")) {
 267                                                         if (current != null)
 268                                                                 current.Domain = str.Substring (str.IndexOf ("=") + 1).Trim ();
 269                                                 } else if (str.StartsWith ("$Port")) {
 270                                                         if (current != null)
 271                                                                 current.Port = str.Substring (str.IndexOf ("=") + 1).Trim ();
 272                                                 } else {
 273                                                         if (current != null) {
 274                                                                 cookies.Add (current);
 275                                                         }
 276                                                         current = new Cookie ();
 277                                                         int idx = str.IndexOf ("=");
 278                                                         if (idx > 0) {
 279                                                                 current.Name = str.Substring (0, idx).Trim ();
 280                                                                 current.Value =  str.Substring (idx + 1).Trim ();
 281                                                         } else {
 282                                                                 current.Name = str.Trim ();
 283                                                                 current.Value = String.Empty;
 284                                                         }
 285                                                         current.Version = version;
 286                                                 }
 287                                         }
 288                                         if (current != null) {
 289                                                 cookies.Add (current);
 290                                         }
 291                                         break;
 292                         }
 293                 }
 294
 295                 public string [] AcceptTypes {
 296                         get { return accept_types; }
 297                 }
 298
 299                 public int ClientCertificateError {
 300                         get {
 301                                 if (no_get_certificate)
 302                                         throw new InvalidOperationException (
 303                                                 "Call GetClientCertificate() before calling this method.");
 304                                 return client_cert_error;
 305                         }
 306                 }
 307
 308                 public Encoding ContentEncoding {
 309                         get {
 310                                 if (content_encoding == null)
 311                                         content_encoding = Encoding.Default;
 312                                 return content_encoding;
 313                         }
 314                 }
 315
 316                 public long ContentLength64 {
 317                         get { return content_length; }
 318                 }
 319
 320                 public string ContentType {
 321                         get { return headers ["content-type"]; }
 322                 }
 323
 324                 public CookieCollection Cookies {
 325                         get {
 326                                 // TODO: check if the collection is read-only
 327                                 if (cookies == null)
 328                                         cookies = new CookieCollection ();
 329                                 return cookies;
 330                         }
 331                 }
 332
 333                 public bool HasEntityBody {
 334                         get { return !(method == "GET" || method == "HEAD" || content_length <= 0 || is_chunked); }
 335                 }
 336
 337                 public NameValueCollection Headers {
 338                         get { return headers; }
 339                 }
 340
 341                 public string HttpMethod {
 342                         get { return method; }
 343                 }
 344
 345                 public Stream InputStream {
 346                         get { return input_stream; }
 347                 }
 348
 349                 public bool IsAuthenticated {
 350                         get { return is_authenticated; }
 351                 }
 352
 353                 public bool IsLocal {
 354                         get { return IPAddress.IsLoopback (RemoteEndPoint.Address); }
 355                 }
 356
 357                 public bool IsSecureConnection {
 358                         get { return context.Connection.IsSecure; }
 359                 }
 360
 361                 public bool KeepAlive {
 362                         get { return false; }
 363                 }
 364
 365                 public IPEndPoint LocalEndPoint {
 366                         get { return context.Connection.LocalEndPoint; }
 367                 }
 368
 369                 public Version ProtocolVersion {
 370                         get { return version; }
 371                 }
 372
 373                 public NameValueCollection QueryString {
 374                         get { return query_string; }
 375                 }
 376
 377                 public string RawUrl {
 378                         get { return raw_url; }
 379                 }
 380
 381                 public IPEndPoint RemoteEndPoint {
 382                         get { return context.Connection.RemoteEndPoint; }
 383                 }
 384
 385                 public Guid RequestTraceIdentifier {
 386                         get { return identifier; }
 387                 }
 388
 389                 public Uri Url {
 390                         get { return url; }
 391                 }
 392
 393                 public Uri UrlReferrer {
 394                         get { return referrer; }
 395                 }
 396
 397                 public string UserAgent {
 398                         get { return headers ["user-agent"]; }
 399                 }
 400
 401                 public string UserHostAddress {
 402                         get { return LocalEndPoint.ToString (); }
 403                 }
 404
 405                 public string UserHostName {
 406                         get { return headers ["host"]; }
 407                 }
 408
 409                 public string [] UserLanguages {
 410                         get { return user_languages; }
 411                 }
 412
 413                 public IAsyncResult BeginGetClientCertificate (AsyncCallback requestCallback, Object state)
 414                 {
 415                         return null;
 416                 }
 417 #if SECURITY_DEP
 418                 public X509Certificate2 EndGetClientCertificate (IAsyncResult asyncResult)
 419                 {
 420                         return null;
 421                         // set no_client_certificate once done.
 422                 }
 423
 424                 public X509Certificate2 GetClientCertificate ()
 425                 {
 426                         // set no_client_certificate once done.
 427
 428                         // InvalidOp if call in progress.
 429                         return null;
 430                 }
 431 #endif
 432         }
 433 }
 434 #endif
 435