mcs/class/System.Runtime.Remoting/MonoHttp/HttpListenerRequest.cs

   1 #define EMBEDDED_IN_1_0
   2
   3 //
   4 // System.Net.HttpListenerRequest
   5 //
   6 // Author:
   7 //      Gonzalo Paniagua Javier (gonzalo@novell.com)
   8 //
   9 // Copyright (c) 2005 Novell, Inc. (http://www.novell.com)
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 #if EMBEDDED_IN_1_0
  32
  33 using System.Collections;
  34 using System.Collections.Specialized;
  35 using System.Globalization;
  36 using System.IO;
  37 using System.Security.Cryptography.X509Certificates;
  38 using System.Text;
  39 using System; using System.Net; namespace MonoHttp {
  40         internal class HttpListenerRequest
  41         {
  42                 string [] accept_types;
  43 //              int client_cert_error;
  44 //              bool no_get_certificate;
  45                 Encoding content_encoding;
  46                 long content_length;
  47                 bool cl_set;
  48                 CookieCollection cookies;
  49                 WebHeaderCollection headers;
  50                 string method;
  51                 Stream input_stream;
  52                 Version version;
  53                 NameValueCollection query_string; // check if null is ok, check if read-only, check case-sensitiveness
  54                 string raw_url;
  55                 Guid identifier;
  56                 Uri url;
  57                 Uri referrer;
  58                 string [] user_languages;
  59                 HttpListenerContext context;
  60                 bool is_chunked;
  61                 static byte [] _100continue = Encoding.ASCII.GetBytes ("HTTP/1.1 100 Continue\r\n\r\n");
  62                 static readonly string [] no_body_methods = new string [] {
  63                         "GET", "HEAD", "DELETE" };
  64
  65                 internal HttpListenerRequest (HttpListenerContext context)
  66                 {
  67                         this.context = context;
  68                         headers = new WebHeaderCollection ();
  69                         input_stream = Stream.Null;
  70                         version = HttpVersion.Version10;
  71                 }
  72
  73                 static char [] separators = new char [] { ' ' };
  74
  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 > 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                         raw_url = parts [1];
  99                         if (parts [2].Length != 8 || !parts [2].StartsWith ("HTTP/")) {
 100                                 context.ErrorMessage = "Invalid request line (version).";
 101                                 return;
 102                         }
 103
 104                         try {
 105                                 version = new Version (parts [2].Substring (5));
 106                                 if (version.Major < 1)
 107                                         throw new Exception ();
 108                         } catch {
 109                                 context.ErrorMessage = "Invalid request line (version).";
 110                                 return;
 111                         }
 112                 }
 113
 114                 void CreateQueryString (string query)
 115                 {
 116                         query_string = new NameValueCollection ();
 117                         if (query == null || query.Length == 0)
 118                                 return;
 119
 120                         if (query [0] == '?')
 121                                 query = query.Substring (1);
 122                         string [] components = query.Split ('&');
 123                         foreach (string kv in components) {
 124                                 int pos = kv.IndexOf ('=');
 125                                 if (pos == -1) {
 126                                         query_string.Add (null, HttpUtility.UrlDecode (kv));
 127                                 } else {
 128                                         string key = HttpUtility.UrlDecode (kv.Substring (0, pos));
 129                                         string val = HttpUtility.UrlDecode (kv.Substring (pos + 1));
 130
 131                                         query_string.Add (key, val);
 132                                 }
 133                         }
 134                 }
 135
 136                 internal void FinishInitialization ()
 137                 {
 138                         string host = UserHostName;
 139                         if (version > HttpVersion.Version10 && (host == null || host.Length == 0)) {
 140                                 context.ErrorMessage = "Invalid host name";
 141                                 return;
 142                         }
 143
 144                         string path;
 145                         Uri raw_uri;
 146                         #if NET_2_0
 147 if (MonoHttp.Utility.MaybeUri (raw_url) && Uri.TryCreate (raw_url, UriKind.Absolute, out raw_uri))
 148 #else
 149 try { raw_uri = new Uri (raw_url); } catch { raw_uri = null; } if (url != raw_uri && (raw_uri.Host == null || raw_uri.Host.Length == 0)) raw_uri = null; if (raw_uri != null)
 150 #endif
 151
 152                                 path = raw_uri.PathAndQuery;
 153                         else
 154                                 path = raw_url;
 155
 156                         if ((host == null || host.Length == 0))
 157                                 host = UserHostAddress;
 158
 159                         if (raw_uri != null)
 160                                 host = raw_uri.Host;
 161
 162                         int colon = host.IndexOf (':');
 163                         if (colon >= 0)
 164                                 host = host.Substring (0, colon);
 165
 166                         string base_uri = String.Format ("{0}://{1}:{2}",
 167                                                                 (IsSecureConnection) ? "https" : "http",
 168                                                                 host,
 169                                                                 LocalEndPoint.Port);
 170
 171                         #if NET_2_0
 172 if (!Uri.TryCreate (base_uri + path, UriKind.Absolute, out url)){
 173 #else
 174 try { url = new Uri (base_uri + path); } catch {}; if (url != null && (url.Host == null || url.Host.Length == 0)) url = null;  if (url == null) {
 175 #endif
 176
 177                                 context.ErrorMessage = "Invalid url: " + base_uri + path;
 178                                 return;
 179                         }
 180
 181                         CreateQueryString (url.Query);
 182
 183                         string t_encoding = null;
 184                         if (version >= HttpVersion.Version11) {
 185                                 t_encoding = Headers ["Transfer-Encoding"];
 186                                 // 'identity' is not valid!
 187                                 if (t_encoding != null && t_encoding != "chunked") {
 188                                         context.Connection.SendError (null, 501);
 189                                         return;
 190                                 }
 191                         }
 192
 193                         is_chunked = (t_encoding == "chunked");
 194
 195                         foreach (string m in no_body_methods)
 196                                 if (string.Compare (method, m, true, System.Globalization.CultureInfo.InvariantCulture) == 0)
 197                                         return;
 198
 199                         if (!is_chunked && !cl_set) {
 200                                 context.Connection.SendError (null, 411);
 201                                 return;
 202                         }
 203
 204                         if (is_chunked || content_length > 0) {
 205                                 input_stream = context.Connection.GetRequestStream (is_chunked, content_length);
 206                         }
 207
 208                         if (Headers ["Expect"] == "100-continue") {
 209                                 ResponseStream output = context.Connection.GetResponseStream ();
 210                                 output.InternalWrite (_100continue, 0, _100continue.Length);
 211                         }
 212                 }
 213
 214                 internal static string Unquote (String str) {
 215                         int start = str.IndexOf ('\"');
 216                         int end = str.LastIndexOf ('\"');
 217                         if (start >= 0 && end >=0)
 218                                 str = str.Substring (start + 1, end - 1);
 219                         return str.Trim ();
 220                 }
 221
 222                 internal void AddHeader (string header)
 223                 {
 224                         int colon = header.IndexOf (':');
 225                         if (colon == -1 || colon == 0) {
 226                                 context.ErrorMessage = "Bad Request";
 227                                 return;
 228                         }
 229
 230                         string name = header.Substring (0, colon).Trim ();
 231                         string val = header.Substring (colon + 1).Trim ();
 232                         string lower = name.ToLower (CultureInfo.InvariantCulture);
 233                         headers.SetInternal (name, val);
 234                         switch (lower) {
 235                                 case "accept-language":
 236                                         user_languages = val.Split (','); // yes, only split with a ','
 237                                         break;
 238                                 case "accept":
 239                                         accept_types = val.Split (','); // yes, only split with a ','
 240                                         break;
 241                                 case "content-length":
 242                                         try {
 243                                                 //TODO: max. content_length?
 244                                                 content_length = Int64.Parse (val.Trim ());
 245                                                 if (content_length < 0)
 246                                                         context.ErrorMessage = "Invalid Content-Length.";
 247                                                 cl_set = true;
 248                                         } catch {
 249                                                 context.ErrorMessage = "Invalid Content-Length.";
 250                                         }
 251
 252                                         break;
 253                                 case "referer":
 254                                         try {
 255                                                 referrer = new Uri (val);
 256                                         } catch {
 257                                                 referrer = new Uri ("http://someone.is.screwing.with.the.headers.com/");
 258                                         }
 259                                         break;
 260                                 case "cookie":
 261                                         if (cookies == null)
 262                                                 cookies = new CookieCollection();
 263
 264                                         string[] cookieStrings = val.Split(new char[] {',', ';'});
 265                                         Cookie current = null;
 266                                         int version = 0;
 267                                         foreach (string cookieString in cookieStrings) {
 268                                                 string str = cookieString.Trim ();
 269                                                 if (str.Length == 0)
 270                                                         continue;
 271                                                 if (str.StartsWith ("$Version")) {
 272                                                         version = Int32.Parse (Unquote (str.Substring (str.IndexOf ("=") + 1)));
 273                                                 } else if (str.StartsWith ("$Path")) {
 274                                                         if (current != null)
 275                                                                 current.Path = str.Substring (str.IndexOf ("=") + 1).Trim ();
 276                                                 } else if (str.StartsWith ("$Domain")) {
 277                                                         if (current != null)
 278                                                                 current.Domain = str.Substring (str.IndexOf ("=") + 1).Trim ();
 279                                                 } else if (str.StartsWith ("$Port")) {
 280                                                         if (current != null)
 281                                                                 current.Port = str.Substring (str.IndexOf ("=") + 1).Trim ();
 282                                                 } else {
 283                                                         if (current != null) {
 284                                                                 cookies.Add (current);
 285                                                         }
 286                                                         current = new Cookie ();
 287                                                         int idx = str.IndexOf ("=");
 288                                                         if (idx > 0) {
 289                                                                 current.Name = str.Substring (0, idx).Trim ();
 290                                                                 current.Value =  str.Substring (idx + 1).Trim ();
 291                                                         } else {
 292                                                                 current.Name = str.Trim ();
 293                                                                 current.Value = String.Empty;
 294                                                         }
 295                                                         current.Version = version;
 296                                                 }
 297                                         }
 298                                         if (current != null) {
 299                                                 cookies.Add (current);
 300                                         }
 301                                         break;
 302                         }
 303                 }
 304
 305                 public string [] AcceptTypes {
 306                         get { return accept_types; }
 307                 }
 308
 309                 [MonoTODO ("Always returns 0")]
 310                 public int ClientCertificateError {
 311                         get {
 312 /*
 313                                 if (no_get_certificate)
 314                                         throw new InvalidOperationException (
 315                                                 "Call GetClientCertificate() before calling this method.");
 316                                 return client_cert_error;
 317 */
 318                                 return 0;
 319                         }
 320                 }
 321
 322                 public Encoding ContentEncoding {
 323                         get {
 324                                 if (content_encoding == null)
 325                                         content_encoding = Encoding.Default;
 326                                 return content_encoding;
 327                         }
 328                 }
 329
 330                 public long ContentLength64 {
 331                         get { return content_length; }
 332                 }
 333
 334                 public string ContentType {
 335                         get { return headers ["content-type"]; }
 336                 }
 337
 338                 public CookieCollection Cookies {
 339                         get {
 340                                 // TODO: check if the collection is read-only
 341                                 if (cookies == null)
 342                                         cookies = new CookieCollection ();
 343                                 return cookies;
 344                         }
 345                 }
 346
 347                 public bool HasEntityBody {
 348                         get { return (content_length > 0 || is_chunked); }
 349                 }
 350
 351                 public NameValueCollection Headers {
 352                         get { return headers; }
 353                 }
 354
 355                 public string HttpMethod {
 356                         get { return method; }
 357                 }
 358
 359                 public Stream InputStream {
 360                         get { return input_stream; }
 361                 }
 362
 363                 [MonoTODO ("Always returns false")]
 364                 public bool IsAuthenticated {
 365                         get { return false; }
 366                 }
 367
 368                 public bool IsLocal {
 369                         get { return IPAddress.IsLoopback (RemoteEndPoint.Address); }
 370                 }
 371
 372                 public bool IsSecureConnection {
 373                         get { return context.Connection.IsSecure; }
 374                 }
 375
 376                 public bool KeepAlive {
 377                         get { return false; }
 378                 }
 379
 380                 public IPEndPoint LocalEndPoint {
 381                         get { return context.Connection.LocalEndPoint; }
 382                 }
 383
 384                 public Version ProtocolVersion {
 385                         get { return version; }
 386                 }
 387
 388                 public NameValueCollection QueryString {
 389                         get { return query_string; }
 390                 }
 391
 392                 public string RawUrl {
 393                         get { return raw_url; }
 394                 }
 395
 396                 public IPEndPoint RemoteEndPoint {
 397                         get { return context.Connection.RemoteEndPoint; }
 398                 }
 399
 400                 public Guid RequestTraceIdentifier {
 401                         get { return identifier; }
 402                 }
 403
 404                 public Uri Url {
 405                         get { return url; }
 406                 }
 407
 408                 public Uri UrlReferrer {
 409                         get { return referrer; }
 410                 }
 411
 412                 public string UserAgent {
 413                         get { return headers ["user-agent"]; }
 414                 }
 415
 416                 public string UserHostAddress {
 417                         get { return LocalEndPoint.ToString (); }
 418                 }
 419
 420                 public string UserHostName {
 421                         get { return headers ["host"]; }
 422                 }
 423
 424                 public string [] UserLanguages {
 425                         get { return user_languages; }
 426                 }
 427
 428                 public IAsyncResult BeginGetClientCertificate (AsyncCallback requestCallback, Object state)
 429                 {
 430                         return null;
 431                 }
 432 #if SECURITY_DEP
 433                 public X509Certificate2 EndGetClientCertificate (IAsyncResult asyncResult)
 434                 {
 435                         return null;
 436                         // set no_client_certificate once done.
 437                 }
 438
 439                 public X509Certificate2 GetClientCertificate ()
 440                 {
 441                         // set no_client_certificate once done.
 442
 443                         // InvalidOp if call in progress.
 444                         return null;
 445                 }
 446 #endif
 447         }
 448 }
 449 #endif
 450