mcs/class/System.Web/System.Web.Util/HttpEncoder.cs

   1 //
   2 // Authors:
   3 //   Patrik Torstensson (Patrik.Torstensson@labs2.com)
   4 //   Wictor Wilén (decode/encode functions) (wictor@ibizkit.se)
   5 //   Tim Coleman (tim@timcoleman.com)
   6 //   Gonzalo Paniagua Javier (gonzalo@ximian.com)
   7
   8 //   Marek Habersack <mhabersack@novell.com>
   9 //
  10 // (C) 2005-2010 Novell, Inc (http://novell.com/)
  11 //
  12
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  33 using System;
  34 using System.Collections.Generic;
  35 using System.Configuration;
  36 using System.IO;
  37 using System.Text;
  38 #if NET_4_0 && !MOBILE
  39 using System.Web.Configuration;
  40 #endif
  41
  42 namespace System.Web.Util
  43 {
  44 #if NET_4_0
  45         public
  46 #endif
  47         class HttpEncoder
  48         {
  49                 static char [] hexChars = "0123456789abcdef".ToCharArray ();
  50                 static object entitiesLock = new object ();
  51                 static SortedDictionary <string, char> entities;
  52 #if NET_4_0
  53                 static Lazy <HttpEncoder> defaultEncoder;
  54                 static Lazy <HttpEncoder> currentEncoderLazy;
  55 #else
  56                 static HttpEncoder defaultEncoder;
  57 #endif
  58                 static HttpEncoder currentEncoder;
  59
  60                 static IDictionary <string, char> Entities {
  61                         get {
  62                                 lock (entitiesLock) {
  63                                         if (entities == null)
  64                                                 InitEntities ();
  65
  66                                         return entities;
  67                                 }
  68                         }
  69                 }
  70
  71                 public static HttpEncoder Current {
  72                         get {
  73 #if NET_4_0
  74                                 if (currentEncoder == null)
  75                                         currentEncoder = currentEncoderLazy.Value;
  76 #endif
  77                                 return currentEncoder;
  78                         }
  79 #if NET_4_0
  80                         set {
  81                                 if (value == null)
  82                                         throw new ArgumentNullException ("value");
  83                                 currentEncoder = value;
  84                         }
  85 #endif
  86                 }
  87
  88                 public static HttpEncoder Default {
  89                         get {
  90 #if NET_4_0
  91                                 return defaultEncoder.Value;
  92 #else
  93                                 return defaultEncoder;
  94 #endif
  95                         }
  96                 }
  97
  98                 static HttpEncoder ()
  99                 {
 100 #if NET_4_0
 101                         defaultEncoder = new Lazy <HttpEncoder> (() => new HttpEncoder ());
 102                         currentEncoderLazy = new Lazy <HttpEncoder> (new Func <HttpEncoder> (GetCustomEncoderFromConfig));
 103 #else
 104                         defaultEncoder = new HttpEncoder ();
 105                         currentEncoder = defaultEncoder;
 106 #endif
 107                 }
 108
 109                 public HttpEncoder ()
 110                 {
 111                 }
 112 #if NET_4_0
 113                 protected internal virtual
 114 #else
 115                 internal static
 116 #endif
 117                 void HeaderNameValueEncode (string headerName, string headerValue, out string encodedHeaderName, out string encodedHeaderValue)
 118                 {
 119                         if (String.IsNullOrEmpty (headerName))
 120                                 encodedHeaderName = headerName;
 121                         else
 122                                 encodedHeaderName = EncodeHeaderString (headerName);
 123
 124                         if (String.IsNullOrEmpty (headerValue))
 125                                 encodedHeaderValue = headerValue;
 126                         else
 127                                 encodedHeaderValue = EncodeHeaderString (headerValue);
 128                 }
 129
 130                 static void StringBuilderAppend (string s, ref StringBuilder sb)
 131                 {
 132                         if (sb == null)
 133                                 sb = new StringBuilder (s);
 134                         else
 135                                 sb.Append (s);
 136                 }
 137
 138                 static string EncodeHeaderString (string input)
 139                 {
 140                         StringBuilder sb = null;
 141                         char ch;
 142
 143                         for (int i = 0; i < input.Length; i++) {
 144                                 ch = input [i];
 145
 146                                 if ((ch < 32 && ch != 9) || ch == 127)
 147                                         StringBuilderAppend (String.Format ("%{0:x2}", (int)ch), ref sb);
 148                         }
 149
 150                         if (sb != null)
 151                                 return sb.ToString ();
 152
 153                         return input;
 154                 }
 155 #if NET_4_0
 156                 protected internal virtual void HtmlAttributeEncode (string value, TextWriter output)
 157                 {
 158
 159                         if (output == null)
 160                                 throw new ArgumentNullException ("output");
 161
 162                         if (String.IsNullOrEmpty (value))
 163                                 return;
 164
 165                         output.Write (HtmlAttributeEncode (value));
 166                 }
 167
 168                 protected internal virtual void HtmlDecode (string value, TextWriter output)
 169                 {
 170                         if (output == null)
 171                                 throw new ArgumentNullException ("output");
 172
 173                         output.Write (HtmlDecode (value));
 174                 }
 175
 176                 protected internal virtual void HtmlEncode (string value, TextWriter output)
 177                 {
 178                         if (output == null)
 179                                 throw new ArgumentNullException ("output");
 180
 181                         output.Write (HtmlEncode (value));
 182                 }
 183
 184                 protected internal virtual byte[] UrlEncode (byte[] bytes, int offset, int count)
 185                 {
 186                         return UrlEncodeToBytes (bytes, offset, count);
 187                 }
 188
 189                 static HttpEncoder GetCustomEncoderFromConfig ()
 190                 {
 191 #if MOBILE
 192                         return defaultEncoder.Value;
 193 #else
 194                         var cfg = HttpRuntime.Section;
 195                         string typeName = cfg.EncoderType;
 196
 197                         if (String.Compare (typeName, "System.Web.Util.HttpEncoder", StringComparison.OrdinalIgnoreCase) == 0)
 198                                 return Default;
 199
 200                         Type t = Type.GetType (typeName, false);
 201                         if (t == null)
 202                                 throw new ConfigurationErrorsException (String.Format ("Could not load type '{0}'.", typeName));
 203
 204                         if (!typeof (HttpEncoder).IsAssignableFrom (t))
 205                                 throw new ConfigurationErrorsException (
 206                                         String.Format ("'{0}' is not allowed here because it does not extend class 'System.Web.Util.HttpEncoder'.", typeName)
 207                                 );
 208
 209                         return Activator.CreateInstance (t, false) as HttpEncoder;
 210 #endif
 211                 }
 212 #endif
 213 #if NET_4_0
 214                 protected internal virtual
 215 #else
 216                 internal static
 217 #endif
 218                 string UrlPathEncode (string value)
 219                 {
 220                         if (String.IsNullOrEmpty (value))
 221                                 return value;
 222
 223                         MemoryStream result = new MemoryStream ();
 224                         int length = value.Length;
 225                         for (int i = 0; i < length; i++)
 226                                 UrlPathEncodeChar (value [i], result);
 227
 228                         return Encoding.ASCII.GetString (result.ToArray ());
 229                 }
 230
 231                 internal static byte[] UrlEncodeToBytes (byte[] bytes, int offset, int count)
 232                 {
 233                         if (bytes == null)
 234                                 throw new ArgumentNullException ("bytes");
 235
 236                         int blen = bytes.Length;
 237                         if (blen == 0)
 238                                 return new byte [0];
 239
 240                         if (offset < 0 || offset >= blen)
 241                                 throw new ArgumentOutOfRangeException("offset");
 242
 243                         if (count < 0 || count > blen - offset)
 244                                 throw new ArgumentOutOfRangeException("count");
 245
 246                         MemoryStream result = new MemoryStream (count);
 247                         int end = offset + count;
 248                         for (int i = offset; i < end; i++)
 249                                 UrlEncodeChar ((char)bytes [i], result, false);
 250
 251                         return result.ToArray();
 252                 }
 253
 254                 internal static string HtmlEncode (string s)
 255                 {
 256                         if (s == null)
 257                                 return null;
 258
 259                         if (s.Length == 0)
 260                                 return String.Empty;
 261
 262                         bool needEncode = false;
 263                         for (int i = 0; i < s.Length; i++) {
 264                                 char c = s [i];
 265                                 if (c == '&' || c == '"' || c == '<' || c == '>' || c > 159
 266 #if NET_4_0
 267                                     || c == '\''
 268 #endif
 269                                 ) {
 270                                         needEncode = true;
 271                                         break;
 272                                 }
 273                         }
 274
 275                         if (!needEncode)
 276                                 return s;
 277
 278                         StringBuilder output = new StringBuilder ();
 279                         char ch;
 280                         int len = s.Length;
 281
 282                         for (int i = 0; i < len; i++) {
 283                                 switch (s [i]) {
 284                                         case '&' :
 285                                                 output.Append ("&amp;");
 286                                                 break;
 287                                         case '>' :
 288                                                 output.Append ("&gt;");
 289                                                 break;
 290                                         case '<' :
 291                                                 output.Append ("&lt;");
 292                                                 break;
 293                                         case '"' :
 294                                                 output.Append ("&quot;");
 295                                                 break;
 296 #if NET_4_0
 297                                         case '\'':
 298                                                 output.Append ("&#39;");
 299                                                 break;
 300 #endif
 301                                         case '\uff1c':
 302                                                 output.Append ("&#65308;");
 303                                                 break;
 304
 305                                         case '\uff1e':
 306                                                 output.Append ("&#65310;");
 307                                                 break;
 308
 309                                         default:
 310                                                 ch = s [i];
 311                                                 if (ch > 159 && ch < 256) {
 312                                                         output.Append ("&#");
 313                                                         output.Append (((int) ch).ToString (Helpers.InvariantCulture));
 314                                                         output.Append (";");
 315                                                 } else
 316                                                         output.Append (ch);
 317                                                 break;
 318                                 }
 319                         }
 320
 321                         return output.ToString ();
 322                 }
 323
 324                 internal static string HtmlAttributeEncode (string s)
 325                 {
 326 #if NET_4_0
 327                         if (String.IsNullOrEmpty (s))
 328                                 return String.Empty;
 329 #else
 330                         if (s == null)
 331                                 return null;
 332
 333                         if (s.Length == 0)
 334                                 return String.Empty;
 335 #endif
 336                         bool needEncode = false;
 337                         for (int i = 0; i < s.Length; i++) {
 338                                 char c = s [i];
 339                                 if (c == '&' || c == '"' || c == '<'
 340 #if NET_4_0
 341                                     || c == '\''
 342 #endif
 343                                 ) {
 344                                         needEncode = true;
 345                                         break;
 346                                 }
 347                         }
 348
 349                         if (!needEncode)
 350                                 return s;
 351
 352                         StringBuilder output = new StringBuilder ();
 353                         int len = s.Length;
 354                         for (int i = 0; i < len; i++)
 355                                 switch (s [i]) {
 356                                 case '&' :
 357                                         output.Append ("&amp;");
 358                                         break;
 359                                 case '"' :
 360                                         output.Append ("&quot;");
 361                                         break;
 362                                 case '<':
 363                                         output.Append ("&lt;");
 364                                         break;
 365 #if NET_4_0
 366                                 case '\'':
 367                                         output.Append ("&#39;");
 368                                         break;
 369 #endif
 370                                 default:
 371                                         output.Append (s [i]);
 372                                         break;
 373                                 }
 374
 375                         return output.ToString();
 376                 }
 377
 378                 internal static string HtmlDecode (string s)
 379                 {
 380                         if (s == null)
 381                                 return null;
 382
 383                         if (s.Length == 0)
 384                                 return String.Empty;
 385
 386                         if (s.IndexOf ('&') == -1)
 387                                 return s;
 388 #if NET_4_0
 389                         StringBuilder rawEntity = new StringBuilder ();
 390 #endif
 391                         StringBuilder entity = new StringBuilder ();
 392                         StringBuilder output = new StringBuilder ();
 393                         int len = s.Length;
 394                         // 0 -> nothing,
 395                         // 1 -> right after '&'
 396                         // 2 -> between '&' and ';' but no '#'
 397                         // 3 -> '#' found after '&' and getting numbers
 398                         int state = 0;
 399                         int number = 0;
 400                         bool is_hex_value = false;
 401                         bool have_trailing_digits = false;
 402
 403                         for (int i = 0; i < len; i++) {
 404                                 char c = s [i];
 405                                 if (state == 0) {
 406                                         if (c == '&') {
 407                                                 entity.Append (c);
 408 #if NET_4_0
 409                                                 rawEntity.Append (c);
 410 #endif
 411                                                 state = 1;
 412                                         } else {
 413                                                 output.Append (c);
 414                                         }
 415                                         continue;
 416                                 }
 417
 418                                 if (c == '&') {
 419                                         state = 1;
 420                                         if (have_trailing_digits) {
 421                                                 entity.Append (number.ToString (Helpers.InvariantCulture));
 422                                                 have_trailing_digits = false;
 423                                         }
 424
 425                                         output.Append (entity.ToString ());
 426                                         entity.Length = 0;
 427                                         entity.Append ('&');
 428                                         continue;
 429                                 }
 430
 431                                 if (state == 1) {
 432                                         if (c == ';') {
 433                                                 state = 0;
 434                                                 output.Append (entity.ToString ());
 435                                                 output.Append (c);
 436                                                 entity.Length = 0;
 437                                         } else {
 438                                                 number = 0;
 439                                                 is_hex_value = false;
 440                                                 if (c != '#') {
 441                                                         state = 2;
 442                                                 } else {
 443                                                         state = 3;
 444                                                 }
 445                                                 entity.Append (c);
 446 #if NET_4_0
 447                                                 rawEntity.Append (c);
 448 #endif
 449                                         }
 450                                 } else if (state == 2) {
 451                                         entity.Append (c);
 452                                         if (c == ';') {
 453                                                 string key = entity.ToString ();
 454                                                 if (key.Length > 1 && Entities.ContainsKey (key.Substring (1, key.Length - 2)))
 455                                                         key = Entities [key.Substring (1, key.Length - 2)].ToString ();
 456
 457                                                 output.Append (key);
 458                                                 state = 0;
 459                                                 entity.Length = 0;
 460 #if NET_4_0
 461                                                 rawEntity.Length = 0;
 462 #endif
 463                                         }
 464                                 } else if (state == 3) {
 465                                         if (c == ';') {
 466 #if NET_4_0
 467                                                 if (number == 0)
 468                                                         output.Append (rawEntity.ToString () + ";");
 469                                                 else
 470 #endif
 471                                                 if (number > 65535) {
 472                                                         output.Append ("&#");
 473                                                         output.Append (number.ToString (Helpers.InvariantCulture));
 474                                                         output.Append (";");
 475                                                 } else {
 476                                                         output.Append ((char) number);
 477                                                 }
 478                                                 state = 0;
 479                                                 entity.Length = 0;
 480 #if NET_4_0
 481                                                 rawEntity.Length = 0;
 482 #endif
 483                                                 have_trailing_digits = false;
 484                                         } else if (is_hex_value &&  Uri.IsHexDigit(c)) {
 485                                                 number = number * 16 + Uri.FromHex(c);
 486                                                 have_trailing_digits = true;
 487 #if NET_4_0
 488                                                 rawEntity.Append (c);
 489 #endif
 490                                         } else if (Char.IsDigit (c)) {
 491                                                 number = number * 10 + ((int) c - '0');
 492                                                 have_trailing_digits = true;
 493 #if NET_4_0
 494                                                 rawEntity.Append (c);
 495 #endif
 496                                         } else if (number == 0 && (c == 'x' || c == 'X')) {
 497                                                 is_hex_value = true;
 498 #if NET_4_0
 499                                                 rawEntity.Append (c);
 500 #endif
 501                                         } else {
 502                                                 state = 2;
 503                                                 if (have_trailing_digits) {
 504                                                         entity.Append (number.ToString (Helpers.InvariantCulture));
 505                                                         have_trailing_digits = false;
 506                                                 }
 507                                                 entity.Append (c);
 508                                         }
 509                                 }
 510                         }
 511
 512                         if (entity.Length > 0) {
 513                                 output.Append (entity.ToString ());
 514                         } else if (have_trailing_digits) {
 515                                 output.Append (number.ToString (Helpers.InvariantCulture));
 516                         }
 517                         return output.ToString ();
 518                 }
 519
 520                 internal static bool NotEncoded (char c)
 521                 {
 522                         return (c == '!' || c == '(' || c == ')' || c == '*' || c == '-' || c == '.' || c == '_'
 523 #if !NET_4_0
 524                                 || c == '\''
 525 #endif
 526                         );
 527                 }
 528
 529                 internal static void UrlEncodeChar (char c, Stream result, bool isUnicode) {
 530                         if (c > 255) {
 531                                 //FIXME: what happens when there is an internal error?
 532                                 //if (!isUnicode)
 533                                 //      throw new ArgumentOutOfRangeException ("c", c, "c must be less than 256");
 534                                 int idx;
 535                                 int i = (int) c;
 536
 537                                 result.WriteByte ((byte)'%');
 538                                 result.WriteByte ((byte)'u');
 539                                 idx = i >> 12;
 540                                 result.WriteByte ((byte)hexChars [idx]);
 541                                 idx = (i >> 8) & 0x0F;
 542                                 result.WriteByte ((byte)hexChars [idx]);
 543                                 idx = (i >> 4) & 0x0F;
 544                                 result.WriteByte ((byte)hexChars [idx]);
 545                                 idx = i & 0x0F;
 546                                 result.WriteByte ((byte)hexChars [idx]);
 547                                 return;
 548                         }
 549
 550                         if (c > ' ' && NotEncoded (c)) {
 551                                 result.WriteByte ((byte)c);
 552                                 return;
 553                         }
 554                         if (c==' ') {
 555                                 result.WriteByte ((byte)'+');
 556                                 return;
 557                         }
 558                         if (    (c < '0') ||
 559                                 (c < 'A' && c > '9') ||
 560                                 (c > 'Z' && c < 'a') ||
 561                                 (c > 'z')) {
 562                                 if (isUnicode && c > 127) {
 563                                         result.WriteByte ((byte)'%');
 564                                         result.WriteByte ((byte)'u');
 565                                         result.WriteByte ((byte)'0');
 566                                         result.WriteByte ((byte)'0');
 567                                 }
 568                                 else
 569                                         result.WriteByte ((byte)'%');
 570
 571                                 int idx = ((int) c) >> 4;
 572                                 result.WriteByte ((byte)hexChars [idx]);
 573                                 idx = ((int) c) & 0x0F;
 574                                 result.WriteByte ((byte)hexChars [idx]);
 575                         }
 576                         else
 577                                 result.WriteByte ((byte)c);
 578                 }
 579
 580                 internal static void UrlPathEncodeChar (char c, Stream result)
 581                 {
 582                         if (c < 33 || c > 126) {
 583                                 byte [] bIn = Encoding.UTF8.GetBytes (c.ToString ());
 584                                 for (int i = 0; i < bIn.Length; i++) {
 585                                         result.WriteByte ((byte) '%');
 586                                         int idx = ((int) bIn [i]) >> 4;
 587                                         result.WriteByte ((byte) hexChars [idx]);
 588                                         idx = ((int) bIn [i]) & 0x0F;
 589                                         result.WriteByte ((byte) hexChars [idx]);
 590                                 }
 591                         }
 592                         else if (c == ' ') {
 593                                 result.WriteByte ((byte) '%');
 594                                 result.WriteByte ((byte) '2');
 595                                 result.WriteByte ((byte) '0');
 596                         }
 597                         else
 598                                 result.WriteByte ((byte) c);
 599                 }
 600
 601                 static void InitEntities ()
 602                 {
 603                         // Build the hash table of HTML entity references.  This list comes
 604                         // from the HTML 4.01 W3C recommendation.
 605                         entities = new SortedDictionary <string, char> (StringComparer.Ordinal);
 606
 607                         entities.Add ("nbsp", '\u00A0');
 608                         entities.Add ("iexcl", '\u00A1');
 609                         entities.Add ("cent", '\u00A2');
 610                         entities.Add ("pound", '\u00A3');
 611                         entities.Add ("curren", '\u00A4');
 612                         entities.Add ("yen", '\u00A5');
 613                         entities.Add ("brvbar", '\u00A6');
 614                         entities.Add ("sect", '\u00A7');
 615                         entities.Add ("uml", '\u00A8');
 616                         entities.Add ("copy", '\u00A9');
 617                         entities.Add ("ordf", '\u00AA');
 618                         entities.Add ("laquo", '\u00AB');
 619                         entities.Add ("not", '\u00AC');
 620                         entities.Add ("shy", '\u00AD');
 621                         entities.Add ("reg", '\u00AE');
 622                         entities.Add ("macr", '\u00AF');
 623                         entities.Add ("deg", '\u00B0');
 624                         entities.Add ("plusmn", '\u00B1');
 625                         entities.Add ("sup2", '\u00B2');
 626                         entities.Add ("sup3", '\u00B3');
 627                         entities.Add ("acute", '\u00B4');
 628                         entities.Add ("micro", '\u00B5');
 629                         entities.Add ("para", '\u00B6');
 630                         entities.Add ("middot", '\u00B7');
 631                         entities.Add ("cedil", '\u00B8');
 632                         entities.Add ("sup1", '\u00B9');
 633                         entities.Add ("ordm", '\u00BA');
 634                         entities.Add ("raquo", '\u00BB');
 635                         entities.Add ("frac14", '\u00BC');
 636                         entities.Add ("frac12", '\u00BD');
 637                         entities.Add ("frac34", '\u00BE');
 638                         entities.Add ("iquest", '\u00BF');
 639                         entities.Add ("Agrave", '\u00C0');
 640                         entities.Add ("Aacute", '\u00C1');
 641                         entities.Add ("Acirc", '\u00C2');
 642                         entities.Add ("Atilde", '\u00C3');
 643                         entities.Add ("Auml", '\u00C4');
 644                         entities.Add ("Aring", '\u00C5');
 645                         entities.Add ("AElig", '\u00C6');
 646                         entities.Add ("Ccedil", '\u00C7');
 647                         entities.Add ("Egrave", '\u00C8');
 648                         entities.Add ("Eacute", '\u00C9');
 649                         entities.Add ("Ecirc", '\u00CA');
 650                         entities.Add ("Euml", '\u00CB');
 651                         entities.Add ("Igrave", '\u00CC');
 652                         entities.Add ("Iacute", '\u00CD');
 653                         entities.Add ("Icirc", '\u00CE');
 654                         entities.Add ("Iuml", '\u00CF');
 655                         entities.Add ("ETH", '\u00D0');
 656                         entities.Add ("Ntilde", '\u00D1');
 657                         entities.Add ("Ograve", '\u00D2');
 658                         entities.Add ("Oacute", '\u00D3');
 659                         entities.Add ("Ocirc", '\u00D4');
 660                         entities.Add ("Otilde", '\u00D5');
 661                         entities.Add ("Ouml", '\u00D6');
 662                         entities.Add ("times", '\u00D7');
 663                         entities.Add ("Oslash", '\u00D8');
 664                         entities.Add ("Ugrave", '\u00D9');
 665                         entities.Add ("Uacute", '\u00DA');
 666                         entities.Add ("Ucirc", '\u00DB');
 667                         entities.Add ("Uuml", '\u00DC');
 668                         entities.Add ("Yacute", '\u00DD');
 669                         entities.Add ("THORN", '\u00DE');
 670                         entities.Add ("szlig", '\u00DF');
 671                         entities.Add ("agrave", '\u00E0');
 672                         entities.Add ("aacute", '\u00E1');
 673                         entities.Add ("acirc", '\u00E2');
 674                         entities.Add ("atilde", '\u00E3');
 675                         entities.Add ("auml", '\u00E4');
 676                         entities.Add ("aring", '\u00E5');
 677                         entities.Add ("aelig", '\u00E6');
 678                         entities.Add ("ccedil", '\u00E7');
 679                         entities.Add ("egrave", '\u00E8');
 680                         entities.Add ("eacute", '\u00E9');
 681                         entities.Add ("ecirc", '\u00EA');
 682                         entities.Add ("euml", '\u00EB');
 683                         entities.Add ("igrave", '\u00EC');
 684                         entities.Add ("iacute", '\u00ED');
 685                         entities.Add ("icirc", '\u00EE');
 686                         entities.Add ("iuml", '\u00EF');
 687                         entities.Add ("eth", '\u00F0');
 688                         entities.Add ("ntilde", '\u00F1');
 689                         entities.Add ("ograve", '\u00F2');
 690                         entities.Add ("oacute", '\u00F3');
 691                         entities.Add ("ocirc", '\u00F4');
 692                         entities.Add ("otilde", '\u00F5');
 693                         entities.Add ("ouml", '\u00F6');
 694                         entities.Add ("divide", '\u00F7');
 695                         entities.Add ("oslash", '\u00F8');
 696                         entities.Add ("ugrave", '\u00F9');
 697                         entities.Add ("uacute", '\u00FA');
 698                         entities.Add ("ucirc", '\u00FB');
 699                         entities.Add ("uuml", '\u00FC');
 700                         entities.Add ("yacute", '\u00FD');
 701                         entities.Add ("thorn", '\u00FE');
 702                         entities.Add ("yuml", '\u00FF');
 703                         entities.Add ("fnof", '\u0192');
 704                         entities.Add ("Alpha", '\u0391');
 705                         entities.Add ("Beta", '\u0392');
 706                         entities.Add ("Gamma", '\u0393');
 707                         entities.Add ("Delta", '\u0394');
 708                         entities.Add ("Epsilon", '\u0395');
 709                         entities.Add ("Zeta", '\u0396');
 710                         entities.Add ("Eta", '\u0397');
 711                         entities.Add ("Theta", '\u0398');
 712                         entities.Add ("Iota", '\u0399');
 713                         entities.Add ("Kappa", '\u039A');
 714                         entities.Add ("Lambda", '\u039B');
 715                         entities.Add ("Mu", '\u039C');
 716                         entities.Add ("Nu", '\u039D');
 717                         entities.Add ("Xi", '\u039E');
 718                         entities.Add ("Omicron", '\u039F');
 719                         entities.Add ("Pi", '\u03A0');
 720                         entities.Add ("Rho", '\u03A1');
 721                         entities.Add ("Sigma", '\u03A3');
 722                         entities.Add ("Tau", '\u03A4');
 723                         entities.Add ("Upsilon", '\u03A5');
 724                         entities.Add ("Phi", '\u03A6');
 725                         entities.Add ("Chi", '\u03A7');
 726                         entities.Add ("Psi", '\u03A8');
 727                         entities.Add ("Omega", '\u03A9');
 728                         entities.Add ("alpha", '\u03B1');
 729                         entities.Add ("beta", '\u03B2');
 730                         entities.Add ("gamma", '\u03B3');
 731                         entities.Add ("delta", '\u03B4');
 732                         entities.Add ("epsilon", '\u03B5');
 733                         entities.Add ("zeta", '\u03B6');
 734                         entities.Add ("eta", '\u03B7');
 735                         entities.Add ("theta", '\u03B8');
 736                         entities.Add ("iota", '\u03B9');
 737                         entities.Add ("kappa", '\u03BA');
 738                         entities.Add ("lambda", '\u03BB');
 739                         entities.Add ("mu", '\u03BC');
 740                         entities.Add ("nu", '\u03BD');
 741                         entities.Add ("xi", '\u03BE');
 742                         entities.Add ("omicron", '\u03BF');
 743                         entities.Add ("pi", '\u03C0');
 744                         entities.Add ("rho", '\u03C1');
 745                         entities.Add ("sigmaf", '\u03C2');
 746                         entities.Add ("sigma", '\u03C3');
 747                         entities.Add ("tau", '\u03C4');
 748                         entities.Add ("upsilon", '\u03C5');
 749                         entities.Add ("phi", '\u03C6');
 750                         entities.Add ("chi", '\u03C7');
 751                         entities.Add ("psi", '\u03C8');
 752                         entities.Add ("omega", '\u03C9');
 753                         entities.Add ("thetasym", '\u03D1');
 754                         entities.Add ("upsih", '\u03D2');
 755                         entities.Add ("piv", '\u03D6');
 756                         entities.Add ("bull", '\u2022');
 757                         entities.Add ("hellip", '\u2026');
 758                         entities.Add ("prime", '\u2032');
 759                         entities.Add ("Prime", '\u2033');
 760                         entities.Add ("oline", '\u203E');
 761                         entities.Add ("frasl", '\u2044');
 762                         entities.Add ("weierp", '\u2118');
 763                         entities.Add ("image", '\u2111');
 764                         entities.Add ("real", '\u211C');
 765                         entities.Add ("trade", '\u2122');
 766                         entities.Add ("alefsym", '\u2135');
 767                         entities.Add ("larr", '\u2190');
 768                         entities.Add ("uarr", '\u2191');
 769                         entities.Add ("rarr", '\u2192');
 770                         entities.Add ("darr", '\u2193');
 771                         entities.Add ("harr", '\u2194');
 772                         entities.Add ("crarr", '\u21B5');
 773                         entities.Add ("lArr", '\u21D0');
 774                         entities.Add ("uArr", '\u21D1');
 775                         entities.Add ("rArr", '\u21D2');
 776                         entities.Add ("dArr", '\u21D3');
 777                         entities.Add ("hArr", '\u21D4');
 778                         entities.Add ("forall", '\u2200');
 779                         entities.Add ("part", '\u2202');
 780                         entities.Add ("exist", '\u2203');
 781                         entities.Add ("empty", '\u2205');
 782                         entities.Add ("nabla", '\u2207');
 783                         entities.Add ("isin", '\u2208');
 784                         entities.Add ("notin", '\u2209');
 785                         entities.Add ("ni", '\u220B');
 786                         entities.Add ("prod", '\u220F');
 787                         entities.Add ("sum", '\u2211');
 788                         entities.Add ("minus", '\u2212');
 789                         entities.Add ("lowast", '\u2217');
 790                         entities.Add ("radic", '\u221A');
 791                         entities.Add ("prop", '\u221D');
 792                         entities.Add ("infin", '\u221E');
 793                         entities.Add ("ang", '\u2220');
 794                         entities.Add ("and", '\u2227');
 795                         entities.Add ("or", '\u2228');
 796                         entities.Add ("cap", '\u2229');
 797                         entities.Add ("cup", '\u222A');
 798                         entities.Add ("int", '\u222B');
 799                         entities.Add ("there4", '\u2234');
 800                         entities.Add ("sim", '\u223C');
 801                         entities.Add ("cong", '\u2245');
 802                         entities.Add ("asymp", '\u2248');
 803                         entities.Add ("ne", '\u2260');
 804                         entities.Add ("equiv", '\u2261');
 805                         entities.Add ("le", '\u2264');
 806                         entities.Add ("ge", '\u2265');
 807                         entities.Add ("sub", '\u2282');
 808                         entities.Add ("sup", '\u2283');
 809                         entities.Add ("nsub", '\u2284');
 810                         entities.Add ("sube", '\u2286');
 811                         entities.Add ("supe", '\u2287');
 812                         entities.Add ("oplus", '\u2295');
 813                         entities.Add ("otimes", '\u2297');
 814                         entities.Add ("perp", '\u22A5');
 815                         entities.Add ("sdot", '\u22C5');
 816                         entities.Add ("lceil", '\u2308');
 817                         entities.Add ("rceil", '\u2309');
 818                         entities.Add ("lfloor", '\u230A');
 819                         entities.Add ("rfloor", '\u230B');
 820                         entities.Add ("lang", '\u2329');
 821                         entities.Add ("rang", '\u232A');
 822                         entities.Add ("loz", '\u25CA');
 823                         entities.Add ("spades", '\u2660');
 824                         entities.Add ("clubs", '\u2663');
 825                         entities.Add ("hearts", '\u2665');
 826                         entities.Add ("diams", '\u2666');
 827                         entities.Add ("quot", '\u0022');
 828                         entities.Add ("amp", '\u0026');
 829                         entities.Add ("lt", '\u003C');
 830                         entities.Add ("gt", '\u003E');
 831                         entities.Add ("OElig", '\u0152');
 832                         entities.Add ("oelig", '\u0153');
 833                         entities.Add ("Scaron", '\u0160');
 834                         entities.Add ("scaron", '\u0161');
 835                         entities.Add ("Yuml", '\u0178');
 836                         entities.Add ("circ", '\u02C6');
 837                         entities.Add ("tilde", '\u02DC');
 838                         entities.Add ("ensp", '\u2002');
 839                         entities.Add ("emsp", '\u2003');
 840                         entities.Add ("thinsp", '\u2009');
 841                         entities.Add ("zwnj", '\u200C');
 842                         entities.Add ("zwj", '\u200D');
 843                         entities.Add ("lrm", '\u200E');
 844                         entities.Add ("rlm", '\u200F');
 845                         entities.Add ("ndash", '\u2013');
 846                         entities.Add ("mdash", '\u2014');
 847                         entities.Add ("lsquo", '\u2018');
 848                         entities.Add ("rsquo", '\u2019');
 849                         entities.Add ("sbquo", '\u201A');
 850                         entities.Add ("ldquo", '\u201C');
 851                         entities.Add ("rdquo", '\u201D');
 852                         entities.Add ("bdquo", '\u201E');
 853                         entities.Add ("dagger", '\u2020');
 854                         entities.Add ("Dagger", '\u2021');
 855                         entities.Add ("permil", '\u2030');
 856                         entities.Add ("lsaquo", '\u2039');
 857                         entities.Add ("rsaquo", '\u203A');
 858                         entities.Add ("euro", '\u20AC');
 859                 }
 860         }
 861 }