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