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