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                 }
  71
  72                 static char [] separators = new char [] { ' ' };
  73
  74                 internal void SetRequestLine (string req)
  75                 {
  76                         string [] parts = req.Split (separators, 3);
  77                         if (parts.Length != 3) {
  78                                 context.ErrorMessage = "Invalid request line (parts).";
  79                                 return;
  80                         }
  81
  82                         method = parts [0];
  83                         foreach (char c in method){
  84                                 int ic = (int) c;
  85
  86                                 if ((ic >= 'A' && ic <= 'Z') ||
  87                                     (ic > 32 && c < 127 && c != '(' && c != ')' && c != '<' &&
  88                                      c != '<' && c != '>' && c != '@' && c != ',' && c != ';' &&
  89                                      c != ':' && c != '\\' && c != '"' && c != '/' && c != '[' &&
  90                                      c != ']' && c != '?' && c != '=' && c != '{' && c != '}'))
  91                                         continue;
  92
  93                                 context.ErrorMessage = "(Invalid verb)";
  94                                 return;
  95                         }
  96
  97                         raw_url = parts [1];
  98                         if (parts [2].Length != 8 || !parts [2].StartsWith ("HTTP/")) {
  99                                 context.ErrorMessage = "Invalid request line (version).";
 100                                 return;
 101                         }
 102
 103                         try {
 104                                 version = new Version (parts [2].Substring (5));
 105                                 if (version.Major < 1)
 106                                         throw new Exception ();
 107                         } catch {
 108                                 context.ErrorMessage = "Invalid request line (version).";
 109                                 return;
 110                         }
 111                 }
 112
 113                 void CreateQueryString (string query)
 114                 {
 115                         query_string = new NameValueCollection ();
 116                         if (query == null || query.Length == 0)
 117                                 return;
 118
 119                         if (query [0] == '?')
 120                                 query = query.Substring (1);
 121                         string [] components = query.Split ('&');
 122                         foreach (string kv in components) {
 123                                 int pos = kv.IndexOf ('=');
 124                                 if (pos == -1) {
 125                                         query_string.Add (null, HttpUtility.UrlDecode (kv));
 126                                 } else {
 127                                         string key = HttpUtility.UrlDecode (kv.Substring (0, pos));
 128                                         string val = HttpUtility.UrlDecode (kv.Substring (pos + 1));
 129
 130                                         query_string.Add (key, val);
 131                                 }
 132                         }
 133                 }
 134
 135                 internal void FinishInitialization ()
 136                 {
 137                         string host = UserHostName;
 138                         if (version > HttpVersion.Version10 && (host == null || host.Length == 0)) {
 139                                 context.ErrorMessage = "Invalid host name";
 140                                 return;
 141                         }
 142
 143                         string path;
 144                         Uri raw_uri;
 145                         #if NET_2_0
 146 if (MonoHttp.Utility.MaybeUri (raw_url) && Uri.TryCreate (raw_url, UriKind.Absolute, out raw_uri))
 147 #else
 148 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)
 149 #endif
 150
 151                                 path = raw_uri.PathAndQuery;
 152                         else
 153                                 path = raw_url;
 154
 155                         if ((host == null || host.Length == 0))
 156                                 host = UserHostAddress;
 157
 158                         if (raw_uri != null)
 159                                 host = raw_uri.Host;
 160
 161                         int colon = host.IndexOf (':');
 162                         if (colon >= 0)
 163                                 host = host.Substring (0, colon);
 164
 165                         string base_uri = String.Format ("{0}://{1}:{2}",
 166                                                                 (IsSecureConnection) ? "https" : "http",
 167                                                                 host,
 168                                                                 LocalEndPoint.Port);
 169
 170                         #if NET_2_0
 171 if (!Uri.TryCreate (base_uri + path, UriKind.Absolute, out url)){
 172 #else
 173 try { url = new Uri (base_uri + path); } catch {}; if (url != null && (url.Host == null || url.Host.Length == 0)) url = null;  if (url == null) {
 174 #endif
 175
 176                                 context.ErrorMessage = "Invalid url: " + base_uri + path;
 177                                 return;
 178                         }
 179
 180                         CreateQueryString (url.Query);
 181
 182                         string t_encoding = null;
 183                         if (version >= HttpVersion.Version11) {
 184                                 t_encoding = Headers ["Transfer-Encoding"];
 185                                 // 'identity' is not valid!
 186                                 if (t_encoding != null && t_encoding != "chunked") {
 187                                         context.Connection.SendError (null, 501);
 188                                         return;
 189                                 }
 190                         }
 191
 192                         is_chunked = (t_encoding == "chunked");
 193
 194                         foreach (string m in no_body_methods)
 195                                 if (string.Compare (method, m, true, System.Globalization.CultureInfo.InvariantCulture) == 0)
 196                                         return;
 197
 198                         if (!is_chunked && !cl_set) {
 199                                 context.Connection.SendError (null, 411);
 200                                 return;
 201                         }
 202
 203                         if (is_chunked || content_length > 0) {
 204                                 input_stream = context.Connection.GetRequestStream (is_chunked, content_length);
 205                         }
 206
 207                         if (Headers ["Expect"] == "100-continue") {
 208                                 ResponseStream output = context.Connection.GetResponseStream ();
 209                                 output.InternalWrite (_100continue, 0, _100continue.Length);
 210                         }
 211                 }
 212
 213                 internal static string Unquote (String str) {
 214                         int start = str.IndexOf ('\"');
 215                         int end = str.LastIndexOf ('\"');
 216                         if (start >= 0 && end >=0)
 217                                 str = str.Substring (start + 1, end - 1);
 218                         return str.Trim ();
 219                 }
 220
 221                 internal void AddHeader (string header)
 222                 {
 223                         int colon = header.IndexOf (':');
 224                         if (colon == -1 || colon == 0) {
 225                                 context.ErrorMessage = "Bad Request";
 226                                 return;
 227                         }
 228
 229                         string name = header.Substring (0, colon).Trim ();
 230                         string val = header.Substring (colon + 1).Trim ();
 231                         string lower = name.ToLower (CultureInfo.InvariantCulture);
 232                         headers.SetInternal (name, val);
 233                         switch (lower) {
 234                                 case "accept-language":
 235                                         user_languages = val.Split (','); // yes, only split with a ','
 236                                         break;
 237                                 case "accept":
 238                                         accept_types = val.Split (','); // yes, only split with a ','
 239                                         break;
 240                                 case "content-length":
 241                                         try {
 242                                                 //TODO: max. content_length?
 243                                                 content_length = Int64.Parse (val.Trim ());
 244                                                 if (content_length < 0)
 245                                                         context.ErrorMessage = "Invalid Content-Length.";
 246                                                 cl_set = true;
 247                                         } catch {
 248                                                 context.ErrorMessage = "Invalid Content-Length.";
 249                                         }
 250
 251                                         break;
 252                                 case "referer":
 253                                         try {
 254                                                 referrer = new Uri (val);
 255                                         } catch {
 256                                                 referrer = new Uri ("http://someone.is.screwing.with.the.headers.com/");
 257                                         }
 258                                         break;
 259                                 case "cookie":
 260                                         if (cookies == null)
 261                                                 cookies = new CookieCollection();
 262
 263                                         string[] cookieStrings = val.Split(new char[] {',', ';'});
 264                                         Cookie current = null;
 265                                         int version = 0;
 266                                         foreach (string cookieString in cookieStrings) {
 267                                                 string str = cookieString.Trim ();
 268                                                 if (str.Length == 0)
 269                                                         continue;
 270                                                 if (str.StartsWith ("$Version")) {
 271                                                         version = Int32.Parse (Unquote (str.Substring (str.IndexOf ("=") + 1)));
 272                                                 } else if (str.StartsWith ("$Path")) {
 273                                                         if (current != null)
 274                                                                 current.Path = str.Substring (str.IndexOf ("=") + 1).Trim ();
 275                                                 } else if (str.StartsWith ("$Domain")) {
 276                                                         if (current != null)
 277                                                                 current.Domain = str.Substring (str.IndexOf ("=") + 1).Trim ();
 278                                                 } else if (str.StartsWith ("$Port")) {
 279                                                         if (current != null)
 280                                                                 current.Port = str.Substring (str.IndexOf ("=") + 1).Trim ();
 281                                                 } else {
 282                                                         if (current != null) {
 283                                                                 cookies.Add (current);
 284                                                         }
 285                                                         current = new Cookie ();
 286                                                         int idx = str.IndexOf ("=");
 287                                                         if (idx > 0) {
 288                                                                 current.Name = str.Substring (0, idx).Trim ();
 289                                                                 current.Value =  str.Substring (idx + 1).Trim ();
 290                                                         } else {
 291                                                                 current.Name = str.Trim ();
 292                                                                 current.Value = String.Empty;
 293                                                         }
 294                                                         current.Version = version;
 295                                                 }
 296                                         }
 297                                         if (current != null) {
 298                                                 cookies.Add (current);
 299                                         }
 300                                         break;
 301                         }
 302                 }
 303
 304                 public string [] AcceptTypes {
 305                         get { return accept_types; }
 306                 }
 307
 308                 [MonoTODO ("Always returns 0")]
 309                 public int ClientCertificateError {
 310                         get {
 311 /*
 312                                 if (no_get_certificate)
 313                                         throw new InvalidOperationException (
 314                                                 "Call GetClientCertificate() before calling this method.");
 315                                 return client_cert_error;
 316 */
 317                                 return 0;
 318                         }
 319                 }
 320
 321                 public Encoding ContentEncoding {
 322                         get {
 323                                 if (content_encoding == null)
 324                                         content_encoding = Encoding.Default;
 325                                 return content_encoding;
 326                         }
 327                 }
 328
 329                 public long ContentLength64 {
 330                         get { return content_length; }
 331                 }
 332
 333                 public string ContentType {
 334                         get { return headers ["content-type"]; }
 335                 }
 336
 337                 public CookieCollection Cookies {
 338                         get {
 339                                 // TODO: check if the collection is read-only
 340                                 if (cookies == null)
 341                                         cookies = new CookieCollection ();
 342                                 return cookies;
 343                         }
 344                 }
 345
 346                 public bool HasEntityBody {
 347                         get { return (content_length > 0 || is_chunked); }
 348                 }
 349
 350                 public NameValueCollection Headers {
 351                         get { return headers; }
 352                 }
 353
 354                 public string HttpMethod {
 355                         get { return method; }
 356                 }
 357
 358                 public Stream InputStream {
 359                         get { return input_stream; }
 360                 }
 361
 362                 [MonoTODO ("Always returns false")]
 363                 public bool IsAuthenticated {
 364                         get { return false; }
 365                 }
 366
 367                 public bool IsLocal {
 368                         get { return IPAddress.IsLoopback (RemoteEndPoint.Address); }
 369                 }
 370
 371                 public bool IsSecureConnection {
 372                         get { return context.Connection.IsSecure; }
 373                 }
 374
 375                 public bool KeepAlive {
 376                         get { return false; }
 377                 }
 378
 379                 public IPEndPoint LocalEndPoint {
 380                         get { return context.Connection.LocalEndPoint; }
 381                 }
 382
 383                 public Version ProtocolVersion {
 384                         get { return version; }
 385                 }
 386
 387                 public NameValueCollection QueryString {
 388                         get { return query_string; }
 389                 }
 390
 391                 public string RawUrl {
 392                         get { return raw_url; }
 393                 }
 394
 395                 public IPEndPoint RemoteEndPoint {
 396                         get { return context.Connection.RemoteEndPoint; }
 397                 }
 398
 399                 public Guid RequestTraceIdentifier {
 400                         get { return identifier; }
 401                 }
 402
 403                 public Uri Url {
 404                         get { return url; }
 405                 }
 406
 407                 public Uri UrlReferrer {
 408                         get { return referrer; }
 409                 }
 410
 411                 public string UserAgent {
 412                         get { return headers ["user-agent"]; }
 413                 }
 414
 415                 public string UserHostAddress {
 416                         get { return LocalEndPoint.ToString (); }
 417                 }
 418
 419                 public string UserHostName {
 420                         get { return headers ["host"]; }
 421                 }
 422
 423                 public string [] UserLanguages {
 424                         get { return user_languages; }
 425                 }
 426
 427                 public IAsyncResult BeginGetClientCertificate (AsyncCallback requestCallback, Object state)
 428                 {
 429                         return null;
 430                 }
 431 #if SECURITY_DEP
 432                 public X509Certificate2 EndGetClientCertificate (IAsyncResult asyncResult)
 433                 {
 434                         return null;
 435                         // set no_client_certificate once done.
 436                 }
 437
 438                 public X509Certificate2 GetClientCertificate ()
 439                 {
 440                         // set no_client_certificate once done.
 441
 442                         // InvalidOp if call in progress.
 443                         return null;
 444                 }
 445 #endif
 446         }
 447 }
 448 #endif
 449