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