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                 }
  69
  70                 static char [] separators = new char [] { ' ' };
  71
  72                 internal void SetRequestLine (string req)
  73                 {
  74                         string [] parts = req.Split (separators, 3);
  75                         if (parts.Length != 3) {
  76                                 context.ErrorMessage = "Invalid request line (parts).";
  77                                 return;
  78                         }
  79
  80                         method = parts [0];
  81                         foreach (char c in method){
  82                                 int ic = (int) c;
  83
  84                                 if ((ic >= 'A' && ic <= 'Z') ||
  85                                     (ic > 32 && c < 127 && c != '(' && c != ')' && c != '<' &&
  86                                      c != '<' && c != '>' && c != '@' && c != ',' && c != ';' &&
  87                                      c != ':' && c != '\\' && c != '"' && c != '/' && c != '[' &&
  88                                      c != ']' && c != '?' && c != '=' && c != '{' && c != '}'))
  89                                         continue;
  90
  91                                 context.ErrorMessage = "(Invalid verb)";
  92                                 return;
  93                         }
  94
  95                         raw_url = parts [1];
  96                         if (parts [2].Length != 8 || !parts [2].StartsWith ("HTTP/")) {
  97                                 context.ErrorMessage = "Invalid request line (version).";
  98                                 return;
  99                         }
 100
 101                         try {
 102                                 version = new Version (parts [2].Substring (5));
 103                                 if (version.Major < 1)
 104                                         throw new Exception ();
 105                         } catch {
 106                                 context.ErrorMessage = "Invalid request line (version).";
 107                                 return;
 108                         }
 109                 }
 110
 111                 void CreateQueryString (string query)
 112                 {
 113                         query_string = new NameValueCollection ();
 114                         if (query == null || query.Length == 0)
 115                                 return;
 116
 117                         if (query [0] == '?')
 118                                 query = query.Substring (1);
 119                         string [] components = query.Split ('&');
 120                         foreach (string kv in components) {
 121                                 int pos = kv.IndexOf ('=');
 122                                 if (pos == -1) {
 123                                         query_string.Add (null, HttpUtility.UrlDecode (kv));
 124                                 } else {
 125                                         string key = HttpUtility.UrlDecode (kv.Substring (0, pos));
 126                                         string val = HttpUtility.UrlDecode (kv.Substring (pos + 1));
 127
 128                                         query_string.Add (key, val);
 129                                 }
 130                         }
 131                 }
 132
 133                 internal void FinishInitialization ()
 134                 {
 135                         string host = UserHostName;
 136                         if (version > HttpVersion.Version10 && (host == null || host.Length == 0)) {
 137                                 context.ErrorMessage = "Invalid host name";
 138                                 return;
 139                         }
 140
 141                         string path;
 142                         Uri raw_uri;
 143                         if (Uri.MaybeUri (raw_url) && Uri.TryCreate (raw_url, UriKind.Absolute, out raw_uri))
 144                                 path = raw_uri.PathAndQuery;
 145                         else
 146                                 path = raw_url;
 147
 148                         if ((host == null || host.Length == 0))
 149                                 host = UserHostAddress;
 150
 151                         if (raw_uri != null)
 152                                 host = raw_uri.Host;
 153
 154                         int colon = host.IndexOf (':');
 155                         if (colon >= 0)
 156                                 host = host.Substring (0, colon);
 157
 158                         string base_uri = String.Format ("{0}://{1}:{2}",
 159                                                                 (IsSecureConnection) ? "https" : "http",
 160                                                                 host,
 161                                                                 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                         string t_encoding = null;
 171                         if (version >= HttpVersion.Version11) {
 172                                 t_encoding = Headers ["Transfer-Encoding"];
 173                                 // 'identity' is not valid!
 174                                 if (t_encoding != null && t_encoding != "chunked") {
 175                                         context.Connection.SendError (null, 501);
 176                                         return;
 177                                 }
 178                         }
 179
 180                         is_chunked = (t_encoding == "chunked");
 181
 182                         foreach (string m in no_body_methods)
 183                                 if (string.Compare (method, m, StringComparison.InvariantCultureIgnoreCase) == 0)
 184                                         return;
 185
 186                         if (!is_chunked && !cl_set) {
 187                                 context.Connection.SendError (null, 411);
 188                                 return;
 189                         }
 190
 191                         if (is_chunked || content_length > 0) {
 192                                 input_stream = context.Connection.GetRequestStream (is_chunked, content_length);
 193                         }
 194
 195                         if (Headers ["Expect"] == "100-continue") {
 196                                 ResponseStream output = context.Connection.GetResponseStream ();
 197                                 output.InternalWrite (_100continue, 0, _100continue.Length);
 198                         }
 199                 }
 200
 201                 internal static string Unquote (String str) {
 202                         int start = str.IndexOf ('\"');
 203                         int end = str.LastIndexOf ('\"');
 204                         if (start >= 0 && end >=0)
 205                                 str = str.Substring (start + 1, end - 1);
 206                         return str.Trim ();
 207                 }
 208
 209                 internal void AddHeader (string header)
 210                 {
 211                         int colon = header.IndexOf (':');
 212                         if (colon == -1 || colon == 0) {
 213                                 context.ErrorMessage = "Bad Request";
 214                                 return;
 215                         }
 216
 217                         string name = header.Substring (0, colon).Trim ();
 218                         string val = header.Substring (colon + 1).Trim ();
 219                         string lower = name.ToLower (CultureInfo.InvariantCulture);
 220                         headers.SetInternal (name, val);
 221                         switch (lower) {
 222                                 case "accept-language":
 223                                         user_languages = val.Split (','); // yes, only split with a ','
 224                                         break;
 225                                 case "accept":
 226                                         accept_types = val.Split (','); // yes, only split with a ','
 227                                         break;
 228                                 case "content-length":
 229                                         try {
 230                                                 //TODO: max. content_length?
 231                                                 content_length = Int64.Parse (val.Trim ());
 232                                                 if (content_length < 0)
 233                                                         context.ErrorMessage = "Invalid Content-Length.";
 234                                                 cl_set = true;
 235                                         } catch {
 236                                                 context.ErrorMessage = "Invalid Content-Length.";
 237                                         }
 238
 239                                         break;
 240                                 case "referer":
 241                                         try {
 242                                                 referrer = new Uri (val);
 243                                         } catch {
 244                                                 referrer = new Uri ("http://someone.is.screwing.with.the.headers.com/");
 245                                         }
 246                                         break;
 247                                 case "cookie":
 248                                         if (cookies == null)
 249                                                 cookies = new CookieCollection();
 250
 251                                         string[] cookieStrings = val.Split(new char[] {',', ';'});
 252                                         Cookie current = null;
 253                                         int version = 0;
 254                                         foreach (string cookieString in cookieStrings) {
 255                                                 string str = cookieString.Trim ();
 256                                                 if (str.Length == 0)
 257                                                         continue;
 258                                                 if (str.StartsWith ("$Version")) {
 259                                                         version = Int32.Parse (Unquote (str.Substring (str.IndexOf ("=") + 1)));
 260                                                 } else if (str.StartsWith ("$Path")) {
 261                                                         if (current != null)
 262                                                                 current.Path = str.Substring (str.IndexOf ("=") + 1).Trim ();
 263                                                 } else if (str.StartsWith ("$Domain")) {
 264                                                         if (current != null)
 265                                                                 current.Domain = str.Substring (str.IndexOf ("=") + 1).Trim ();
 266                                                 } else if (str.StartsWith ("$Port")) {
 267                                                         if (current != null)
 268                                                                 current.Port = str.Substring (str.IndexOf ("=") + 1).Trim ();
 269                                                 } else {
 270                                                         if (current != null) {
 271                                                                 cookies.Add (current);
 272                                                         }
 273                                                         current = new Cookie ();
 274                                                         int idx = str.IndexOf ("=");
 275                                                         if (idx > 0) {
 276                                                                 current.Name = str.Substring (0, idx).Trim ();
 277                                                                 current.Value =  str.Substring (idx + 1).Trim ();
 278                                                         } else {
 279                                                                 current.Name = str.Trim ();
 280                                                                 current.Value = String.Empty;
 281                                                         }
 282                                                         current.Version = version;
 283                                                 }
 284                                         }
 285                                         if (current != null) {
 286                                                 cookies.Add (current);
 287                                         }
 288                                         break;
 289                         }
 290                 }
 291
 292                 public string [] AcceptTypes {
 293                         get { return accept_types; }
 294                 }
 295
 296                 [MonoTODO ("Always returns 0")]
 297                 public int ClientCertificateError {
 298                         get {
 299 /*
 300                                 if (no_get_certificate)
 301                                         throw new InvalidOperationException (
 302                                                 "Call GetClientCertificate() before calling this method.");
 303                                 return client_cert_error;
 304 */
 305                                 return 0;
 306                         }
 307                 }
 308
 309                 public Encoding ContentEncoding {
 310                         get {
 311                                 if (content_encoding == null)
 312                                         content_encoding = Encoding.Default;
 313                                 return content_encoding;
 314                         }
 315                 }
 316
 317                 public long ContentLength64 {
 318                         get { return content_length; }
 319                 }
 320
 321                 public string ContentType {
 322                         get { return headers ["content-type"]; }
 323                 }
 324
 325                 public CookieCollection Cookies {
 326                         get {
 327                                 // TODO: check if the collection is read-only
 328                                 if (cookies == null)
 329                                         cookies = new CookieCollection ();
 330                                 return cookies;
 331                         }
 332                 }
 333
 334                 public bool HasEntityBody {
 335                         get { return (content_length > 0 || is_chunked); }
 336                 }
 337
 338                 public NameValueCollection Headers {
 339                         get { return headers; }
 340                 }
 341
 342                 public string HttpMethod {
 343                         get { return method; }
 344                 }
 345
 346                 public Stream InputStream {
 347                         get { return input_stream; }
 348                 }
 349
 350                 [MonoTODO ("Always returns false")]
 351                 public bool IsAuthenticated {
 352                         get { return false; }
 353                 }
 354
 355                 public bool IsLocal {
 356                         get { return IPAddress.IsLoopback (RemoteEndPoint.Address); }
 357                 }
 358
 359                 public bool IsSecureConnection {
 360                         get { return context.Connection.IsSecure; }
 361                 }
 362
 363                 public bool KeepAlive {
 364                         get { return false; }
 365                 }
 366
 367                 public IPEndPoint LocalEndPoint {
 368                         get { return context.Connection.LocalEndPoint; }
 369                 }
 370
 371                 public Version ProtocolVersion {
 372                         get { return version; }
 373                 }
 374
 375                 public NameValueCollection QueryString {
 376                         get { return query_string; }
 377                 }
 378
 379                 public string RawUrl {
 380                         get { return raw_url; }
 381                 }
 382
 383                 public IPEndPoint RemoteEndPoint {
 384                         get { return context.Connection.RemoteEndPoint; }
 385                 }
 386
 387                 public Guid RequestTraceIdentifier {
 388                         get { return identifier; }
 389                 }
 390
 391                 public Uri Url {
 392                         get { return url; }
 393                 }
 394
 395                 public Uri UrlReferrer {
 396                         get { return referrer; }
 397                 }
 398
 399                 public string UserAgent {
 400                         get { return headers ["user-agent"]; }
 401                 }
 402
 403                 public string UserHostAddress {
 404                         get { return LocalEndPoint.ToString (); }
 405                 }
 406
 407                 public string UserHostName {
 408                         get { return headers ["host"]; }
 409                 }
 410
 411                 public string [] UserLanguages {
 412                         get { return user_languages; }
 413                 }
 414
 415                 public IAsyncResult BeginGetClientCertificate (AsyncCallback requestCallback, Object state)
 416                 {
 417                         return null;
 418                 }
 419 #if SECURITY_DEP
 420                 public X509Certificate2 EndGetClientCertificate (IAsyncResult asyncResult)
 421                 {
 422                         return null;
 423                         // set no_client_certificate once done.
 424                 }
 425
 426                 public X509Certificate2 GetClientCertificate ()
 427                 {
 428                         // set no_client_certificate once done.
 429
 430                         // InvalidOp if call in progress.
 431                         return null;
 432                 }
 433 #endif
 434         }
 435 }
 436 #endif
 437