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
  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                         var cfg = HttpRuntime.Section;
 192                         string typeName = cfg.EncoderType;
 193
 194                         if (String.Compare (typeName, "System.Web.Util.HttpEncoder", StringComparison.OrdinalIgnoreCase) == 0)
 195                                 return Default;
 196
 197                         Type t = Type.GetType (typeName, false);
 198                         if (t == null)
 199                                 throw new ConfigurationErrorsException (String.Format ("Could not load type '{0}'.", typeName));
 200
 201                         if (!typeof (HttpEncoder).IsAssignableFrom (t))
 202                                 throw new ConfigurationErrorsException (
 203                                         String.Format ("'{0}' is not allowed here because it does not extend class 'System.Web.Util.HttpEncoder'.", typeName)
 204                                 );
 205
 206                         return Activator.CreateInstance (t, false) as HttpEncoder;
 207                 }
 208 #endif
 209 #if NET_4_0
 210                 protected internal virtual
 211 #else
 212                 internal static
 213 #endif
 214                 string UrlPathEncode (string value)
 215                 {
 216                         if (String.IsNullOrEmpty (value))
 217                                 return value;
 218
 219                         MemoryStream result = new MemoryStream ();
 220                         int length = value.Length;
 221                         for (int i = 0; i < length; i++)
 222                                 UrlPathEncodeChar (value [i], result);
 223
 224                         return Encoding.ASCII.GetString (result.ToArray ());
 225                 }
 226
 227                 internal static byte[] UrlEncodeToBytes (byte[] bytes, int offset, int count)
 228                 {
 229                         if (bytes == null)
 230                                 throw new ArgumentNullException ("bytes");
 231
 232                         int blen = bytes.Length;
 233                         if (blen == 0)
 234                                 return new byte [0];
 235
 236                         if (offset < 0 || offset >= blen)
 237                                 throw new ArgumentOutOfRangeException("offset");
 238
 239                         if (count < 0 || count > blen - offset)
 240                                 throw new ArgumentOutOfRangeException("count");
 241
 242                         MemoryStream result = new MemoryStream (count);
 243                         int end = offset + count;
 244                         for (int i = offset; i < end; i++)
 245                                 UrlEncodeChar ((char)bytes [i], result, false);
 246
 247                         return result.ToArray();
 248                 }
 249
 250                 internal static string HtmlEncode (string s)
 251                 {
 252                         if (s == null)
 253                                 return null;
 254
 255                         if (s.Length == 0)
 256                                 return String.Empty;
 257
 258                         bool needEncode = false;
 259                         for (int i = 0; i < s.Length; i++) {
 260                                 char c = s [i];
 261                                 if (c == '&' || c == '"' || c == '<' || c == '>' || c > 159
 262 #if NET_4_0
 263                                     || c == '\''
 264 #endif
 265                                 ) {
 266                                         needEncode = true;
 267                                         break;
 268                                 }
 269                         }
 270
 271                         if (!needEncode)
 272                                 return s;
 273
 274                         StringBuilder output = new StringBuilder ();
 275                         char ch;
 276                         int len = s.Length;
 277
 278                         for (int i = 0; i < len; i++) {
 279                                 switch (s [i]) {
 280                                         case '&' :
 281                                                 output.Append ("&amp;");
 282                                                 break;
 283                                         case '>' :
 284                                                 output.Append ("&gt;");
 285                                                 break;
 286                                         case '<' :
 287                                                 output.Append ("&lt;");
 288                                                 break;
 289                                         case '"' :
 290                                                 output.Append ("&quot;");
 291                                                 break;
 292 #if NET_4_0
 293                                         case '\'':
 294                                                 output.Append ("&#39;");
 295                                                 break;
 296 #endif
 297                                         case '\uff1c':
 298                                                 output.Append ("&#65308;");
 299                                                 break;
 300
 301                                         case '\uff1e':
 302                                                 output.Append ("&#65310;");
 303                                                 break;
 304
 305                                         default:
 306                                                 ch = s [i];
 307                                                 if (ch > 159 && ch < 256) {
 308                                                         output.Append ("&#");
 309                                                         output.Append (((int) ch).ToString (Helpers.InvariantCulture));
 310                                                         output.Append (";");
 311                                                 } else
 312                                                         output.Append (ch);
 313                                                 break;
 314                                 }
 315                         }
 316
 317                         return output.ToString ();
 318                 }
 319
 320                 internal static string HtmlAttributeEncode (string s)
 321                 {
 322 #if NET_4_0
 323                         if (String.IsNullOrEmpty (s))
 324                                 return String.Empty;
 325 #else
 326                         if (s == null)
 327                                 return null;
 328
 329                         if (s.Length == 0)
 330                                 return String.Empty;
 331 #endif
 332                         bool needEncode = false;
 333                         for (int i = 0; i < s.Length; i++) {
 334                                 char c = s [i];
 335                                 if (c == '&' || c == '"' || c == '<'
 336 #if NET_4_0
 337                                     || c == '\''
 338 #endif
 339                                 ) {
 340                                         needEncode = true;
 341                                         break;
 342                                 }
 343                         }
 344
 345                         if (!needEncode)
 346                                 return s;
 347
 348                         StringBuilder output = new StringBuilder ();
 349                         int len = s.Length;
 350                         for (int i = 0; i < len; i++)
 351                                 switch (s [i]) {
 352                                 case '&' :
 353                                         output.Append ("&amp;");
 354                                         break;
 355                                 case '"' :
 356                                         output.Append ("&quot;");
 357                                         break;
 358                                 case '<':
 359                                         output.Append ("&lt;");
 360                                         break;
 361 #if NET_4_0
 362                                 case '\'':
 363                                         output.Append ("&#39;");
 364                                         break;
 365 #endif
 366                                 default:
 367                                         output.Append (s [i]);
 368                                         break;
 369                                 }
 370
 371                         return output.ToString();
 372                 }
 373
 374                 internal static string HtmlDecode (string s)
 375                 {
 376                         if (s == null)
 377                                 return null;
 378
 379                         if (s.Length == 0)
 380                                 return String.Empty;
 381
 382                         if (s.IndexOf ('&') == -1)
 383                                 return s;
 384 #if NET_4_0
 385                         StringBuilder rawEntity = new StringBuilder ();
 386 #endif
 387                         StringBuilder entity = new StringBuilder ();
 388                         StringBuilder output = new StringBuilder ();
 389                         int len = s.Length;
 390                         // 0 -> nothing,
 391                         // 1 -> right after '&'
 392                         // 2 -> between '&' and ';' but no '#'
 393                         // 3 -> '#' found after '&' and getting numbers
 394                         int state = 0;
 395                         int number = 0;
 396                         bool is_hex_value = false;
 397                         bool have_trailing_digits = false;
 398
 399                         for (int i = 0; i < len; i++) {
 400                                 char c = s [i];
 401                                 if (state == 0) {
 402                                         if (c == '&') {
 403                                                 entity.Append (c);
 404 #if NET_4_0
 405                                                 rawEntity.Append (c);
 406 #endif
 407                                                 state = 1;
 408                                         } else {
 409                                                 output.Append (c);
 410                                         }
 411                                         continue;
 412                                 }
 413
 414                                 if (c == '&') {
 415                                         state = 1;
 416                                         if (have_trailing_digits) {
 417                                                 entity.Append (number.ToString (Helpers.InvariantCulture));
 418                                                 have_trailing_digits = false;
 419                                         }
 420
 421                                         output.Append (entity.ToString ());
 422                                         entity.Length = 0;
 423                                         entity.Append ('&');
 424                                         continue;
 425                                 }
 426
 427                                 if (state == 1) {
 428                                         if (c == ';') {
 429                                                 state = 0;
 430                                                 output.Append (entity.ToString ());
 431                                                 output.Append (c);
 432                                                 entity.Length = 0;
 433                                         } else {
 434                                                 number = 0;
 435                                                 is_hex_value = false;
 436                                                 if (c != '#') {
 437                                                         state = 2;
 438                                                 } else {
 439                                                         state = 3;
 440                                                 }
 441                                                 entity.Append (c);
 442 #if NET_4_0
 443                                                 rawEntity.Append (c);
 444 #endif
 445                                         }
 446                                 } else if (state == 2) {
 447                                         entity.Append (c);
 448                                         if (c == ';') {
 449                                                 string key = entity.ToString ();
 450                                                 if (key.Length > 1 && Entities.ContainsKey (key.Substring (1, key.Length - 2)))
 451                                                         key = Entities [key.Substring (1, key.Length - 2)].ToString ();
 452
 453                                                 output.Append (key);
 454                                                 state = 0;
 455                                                 entity.Length = 0;
 456 #if NET_4_0
 457                                                 rawEntity.Length = 0;
 458 #endif
 459                                         }
 460                                 } else if (state == 3) {
 461                                         if (c == ';') {
 462 #if NET_4_0
 463                                                 if (number == 0)
 464                                                         output.Append (rawEntity.ToString () + ";");
 465                                                 else
 466 #endif
 467                                                 if (number > 65535) {
 468                                                         output.Append ("&#");
 469                                                         output.Append (number.ToString (Helpers.InvariantCulture));
 470                                                         output.Append (";");
 471                                                 } else {
 472                                                         output.Append ((char) number);
 473                                                 }
 474                                                 state = 0;
 475                                                 entity.Length = 0;
 476 #if NET_4_0
 477                                                 rawEntity.Length = 0;
 478 #endif
 479                                                 have_trailing_digits = false;
 480                                         } else if (is_hex_value &&  Uri.IsHexDigit(c)) {
 481                                                 number = number * 16 + Uri.FromHex(c);
 482                                                 have_trailing_digits = true;
 483 #if NET_4_0
 484                                                 rawEntity.Append (c);
 485 #endif
 486                                         } else if (Char.IsDigit (c)) {
 487                                                 number = number * 10 + ((int) c - '0');
 488                                                 have_trailing_digits = true;
 489 #if NET_4_0
 490                                                 rawEntity.Append (c);
 491 #endif
 492                                         } else if (number == 0 && (c == 'x' || c == 'X')) {
 493                                                 is_hex_value = true;
 494 #if NET_4_0
 495                                                 rawEntity.Append (c);
 496 #endif
 497                                         } else {
 498                                                 state = 2;
 499                                                 if (have_trailing_digits) {
 500                                                         entity.Append (number.ToString (Helpers.InvariantCulture));
 501                                                         have_trailing_digits = false;
 502                                                 }
 503                                                 entity.Append (c);
 504                                         }
 505                                 }
 506                         }
 507
 508                         if (entity.Length > 0) {
 509                                 output.Append (entity.ToString ());
 510                         } else if (have_trailing_digits) {
 511                                 output.Append (number.ToString (Helpers.InvariantCulture));
 512                         }
 513                         return output.ToString ();
 514                 }
 515
 516                 internal static bool NotEncoded (char c)
 517                 {
 518                         return (c == '!' || c == '(' || c == ')' || c == '*' || c == '-' || c == '.' || c == '_'
 519 #if !NET_4_0
 520                                 || c == '\''
 521 #endif
 522                         );
 523                 }
 524
 525                 internal static void UrlEncodeChar (char c, Stream result, bool isUnicode) {
 526                         if (c > 255) {
 527                                 //FIXME: what happens when there is an internal error?
 528                                 //if (!isUnicode)
 529                                 //      throw new ArgumentOutOfRangeException ("c", c, "c must be less than 256");
 530                                 int idx;
 531                                 int i = (int) c;
 532
 533                                 result.WriteByte ((byte)'%');
 534                                 result.WriteByte ((byte)'u');
 535                                 idx = i >> 12;
 536                                 result.WriteByte ((byte)hexChars [idx]);
 537                                 idx = (i >> 8) & 0x0F;
 538                                 result.WriteByte ((byte)hexChars [idx]);
 539                                 idx = (i >> 4) & 0x0F;
 540                                 result.WriteByte ((byte)hexChars [idx]);
 541                                 idx = i & 0x0F;
 542                                 result.WriteByte ((byte)hexChars [idx]);
 543                                 return;
 544                         }
 545
 546                         if (c > ' ' && NotEncoded (c)) {
 547                                 result.WriteByte ((byte)c);
 548                                 return;
 549                         }
 550                         if (c==' ') {
 551                                 result.WriteByte ((byte)'+');
 552                                 return;
 553                         }
 554                         if (    (c < '0') ||
 555                                 (c < 'A' && c > '9') ||
 556                                 (c > 'Z' && c < 'a') ||
 557                                 (c > 'z')) {
 558                                 if (isUnicode && c > 127) {
 559                                         result.WriteByte ((byte)'%');
 560                                         result.WriteByte ((byte)'u');
 561                                         result.WriteByte ((byte)'0');
 562                                         result.WriteByte ((byte)'0');
 563                                 }
 564                                 else
 565                                         result.WriteByte ((byte)'%');
 566
 567                                 int idx = ((int) c) >> 4;
 568                                 result.WriteByte ((byte)hexChars [idx]);
 569                                 idx = ((int) c) & 0x0F;
 570                                 result.WriteByte ((byte)hexChars [idx]);
 571                         }
 572                         else
 573                                 result.WriteByte ((byte)c);
 574                 }
 575
 576                 internal static void UrlPathEncodeChar (char c, Stream result)
 577                 {
 578                         if (c < 33 || c > 126) {
 579                                 byte [] bIn = Encoding.UTF8.GetBytes (c.ToString ());
 580                                 for (int i = 0; i < bIn.Length; i++) {
 581                                         result.WriteByte ((byte) '%');
 582                                         int idx = ((int) bIn [i]) >> 4;
 583                                         result.WriteByte ((byte) hexChars [idx]);
 584                                         idx = ((int) bIn [i]) & 0x0F;
 585                                         result.WriteByte ((byte) hexChars [idx]);
 586                                 }
 587                         }
 588                         else if (c == ' ') {
 589                                 result.WriteByte ((byte) '%');
 590                                 result.WriteByte ((byte) '2');
 591                                 result.WriteByte ((byte) '0');
 592                         }
 593                         else
 594                                 result.WriteByte ((byte) c);
 595                 }
 596
 597                 static void InitEntities ()
 598                 {
 599                         // Build the hash table of HTML entity references.  This list comes
 600                         // from the HTML 4.01 W3C recommendation.
 601                         entities = new SortedDictionary <string, char> (StringComparer.Ordinal);
 602
 603                         entities.Add ("nbsp", '\u00A0');
 604                         entities.Add ("iexcl", '\u00A1');
 605                         entities.Add ("cent", '\u00A2');
 606                         entities.Add ("pound", '\u00A3');
 607                         entities.Add ("curren", '\u00A4');
 608                         entities.Add ("yen", '\u00A5');
 609                         entities.Add ("brvbar", '\u00A6');
 610                         entities.Add ("sect", '\u00A7');
 611                         entities.Add ("uml", '\u00A8');
 612                         entities.Add ("copy", '\u00A9');
 613                         entities.Add ("ordf", '\u00AA');
 614                         entities.Add ("laquo", '\u00AB');
 615                         entities.Add ("not", '\u00AC');
 616                         entities.Add ("shy", '\u00AD');
 617                         entities.Add ("reg", '\u00AE');
 618                         entities.Add ("macr", '\u00AF');
 619                         entities.Add ("deg", '\u00B0');
 620                         entities.Add ("plusmn", '\u00B1');
 621                         entities.Add ("sup2", '\u00B2');
 622                         entities.Add ("sup3", '\u00B3');
 623                         entities.Add ("acute", '\u00B4');
 624                         entities.Add ("micro", '\u00B5');
 625                         entities.Add ("para", '\u00B6');
 626                         entities.Add ("middot", '\u00B7');
 627                         entities.Add ("cedil", '\u00B8');
 628                         entities.Add ("sup1", '\u00B9');
 629                         entities.Add ("ordm", '\u00BA');
 630                         entities.Add ("raquo", '\u00BB');
 631                         entities.Add ("frac14", '\u00BC');
 632                         entities.Add ("frac12", '\u00BD');
 633                         entities.Add ("frac34", '\u00BE');
 634                         entities.Add ("iquest", '\u00BF');
 635                         entities.Add ("Agrave", '\u00C0');
 636                         entities.Add ("Aacute", '\u00C1');
 637                         entities.Add ("Acirc", '\u00C2');
 638                         entities.Add ("Atilde", '\u00C3');
 639                         entities.Add ("Auml", '\u00C4');
 640                         entities.Add ("Aring", '\u00C5');
 641                         entities.Add ("AElig", '\u00C6');
 642                         entities.Add ("Ccedil", '\u00C7');
 643                         entities.Add ("Egrave", '\u00C8');
 644                         entities.Add ("Eacute", '\u00C9');
 645                         entities.Add ("Ecirc", '\u00CA');
 646                         entities.Add ("Euml", '\u00CB');
 647                         entities.Add ("Igrave", '\u00CC');
 648                         entities.Add ("Iacute", '\u00CD');
 649                         entities.Add ("Icirc", '\u00CE');
 650                         entities.Add ("Iuml", '\u00CF');
 651                         entities.Add ("ETH", '\u00D0');
 652                         entities.Add ("Ntilde", '\u00D1');
 653                         entities.Add ("Ograve", '\u00D2');
 654                         entities.Add ("Oacute", '\u00D3');
 655                         entities.Add ("Ocirc", '\u00D4');
 656                         entities.Add ("Otilde", '\u00D5');
 657                         entities.Add ("Ouml", '\u00D6');
 658                         entities.Add ("times", '\u00D7');
 659                         entities.Add ("Oslash", '\u00D8');
 660                         entities.Add ("Ugrave", '\u00D9');
 661                         entities.Add ("Uacute", '\u00DA');
 662                         entities.Add ("Ucirc", '\u00DB');
 663                         entities.Add ("Uuml", '\u00DC');
 664                         entities.Add ("Yacute", '\u00DD');
 665                         entities.Add ("THORN", '\u00DE');
 666                         entities.Add ("szlig", '\u00DF');
 667                         entities.Add ("agrave", '\u00E0');
 668                         entities.Add ("aacute", '\u00E1');
 669                         entities.Add ("acirc", '\u00E2');
 670                         entities.Add ("atilde", '\u00E3');
 671                         entities.Add ("auml", '\u00E4');
 672                         entities.Add ("aring", '\u00E5');
 673                         entities.Add ("aelig", '\u00E6');
 674                         entities.Add ("ccedil", '\u00E7');
 675                         entities.Add ("egrave", '\u00E8');
 676                         entities.Add ("eacute", '\u00E9');
 677                         entities.Add ("ecirc", '\u00EA');
 678                         entities.Add ("euml", '\u00EB');
 679                         entities.Add ("igrave", '\u00EC');
 680                         entities.Add ("iacute", '\u00ED');
 681                         entities.Add ("icirc", '\u00EE');
 682                         entities.Add ("iuml", '\u00EF');
 683                         entities.Add ("eth", '\u00F0');
 684                         entities.Add ("ntilde", '\u00F1');
 685                         entities.Add ("ograve", '\u00F2');
 686                         entities.Add ("oacute", '\u00F3');
 687                         entities.Add ("ocirc", '\u00F4');
 688                         entities.Add ("otilde", '\u00F5');
 689                         entities.Add ("ouml", '\u00F6');
 690                         entities.Add ("divide", '\u00F7');
 691                         entities.Add ("oslash", '\u00F8');
 692                         entities.Add ("ugrave", '\u00F9');
 693                         entities.Add ("uacute", '\u00FA');
 694                         entities.Add ("ucirc", '\u00FB');
 695                         entities.Add ("uuml", '\u00FC');
 696                         entities.Add ("yacute", '\u00FD');
 697                         entities.Add ("thorn", '\u00FE');
 698                         entities.Add ("yuml", '\u00FF');
 699                         entities.Add ("fnof", '\u0192');
 700                         entities.Add ("Alpha", '\u0391');
 701                         entities.Add ("Beta", '\u0392');
 702                         entities.Add ("Gamma", '\u0393');
 703                         entities.Add ("Delta", '\u0394');
 704                         entities.Add ("Epsilon", '\u0395');
 705                         entities.Add ("Zeta", '\u0396');
 706                         entities.Add ("Eta", '\u0397');
 707                         entities.Add ("Theta", '\u0398');
 708                         entities.Add ("Iota", '\u0399');
 709                         entities.Add ("Kappa", '\u039A');
 710                         entities.Add ("Lambda", '\u039B');
 711                         entities.Add ("Mu", '\u039C');
 712                         entities.Add ("Nu", '\u039D');
 713                         entities.Add ("Xi", '\u039E');
 714                         entities.Add ("Omicron", '\u039F');
 715                         entities.Add ("Pi", '\u03A0');
 716                         entities.Add ("Rho", '\u03A1');
 717                         entities.Add ("Sigma", '\u03A3');
 718                         entities.Add ("Tau", '\u03A4');
 719                         entities.Add ("Upsilon", '\u03A5');
 720                         entities.Add ("Phi", '\u03A6');
 721                         entities.Add ("Chi", '\u03A7');
 722                         entities.Add ("Psi", '\u03A8');
 723                         entities.Add ("Omega", '\u03A9');
 724                         entities.Add ("alpha", '\u03B1');
 725                         entities.Add ("beta", '\u03B2');
 726                         entities.Add ("gamma", '\u03B3');
 727                         entities.Add ("delta", '\u03B4');
 728                         entities.Add ("epsilon", '\u03B5');
 729                         entities.Add ("zeta", '\u03B6');
 730                         entities.Add ("eta", '\u03B7');
 731                         entities.Add ("theta", '\u03B8');
 732                         entities.Add ("iota", '\u03B9');
 733                         entities.Add ("kappa", '\u03BA');
 734                         entities.Add ("lambda", '\u03BB');
 735                         entities.Add ("mu", '\u03BC');
 736                         entities.Add ("nu", '\u03BD');
 737                         entities.Add ("xi", '\u03BE');
 738                         entities.Add ("omicron", '\u03BF');
 739                         entities.Add ("pi", '\u03C0');
 740                         entities.Add ("rho", '\u03C1');
 741                         entities.Add ("sigmaf", '\u03C2');
 742                         entities.Add ("sigma", '\u03C3');
 743                         entities.Add ("tau", '\u03C4');
 744                         entities.Add ("upsilon", '\u03C5');
 745                         entities.Add ("phi", '\u03C6');
 746                         entities.Add ("chi", '\u03C7');
 747                         entities.Add ("psi", '\u03C8');
 748                         entities.Add ("omega", '\u03C9');
 749                         entities.Add ("thetasym", '\u03D1');
 750                         entities.Add ("upsih", '\u03D2');
 751                         entities.Add ("piv", '\u03D6');
 752                         entities.Add ("bull", '\u2022');
 753                         entities.Add ("hellip", '\u2026');
 754                         entities.Add ("prime", '\u2032');
 755                         entities.Add ("Prime", '\u2033');
 756                         entities.Add ("oline", '\u203E');
 757                         entities.Add ("frasl", '\u2044');
 758                         entities.Add ("weierp", '\u2118');
 759                         entities.Add ("image", '\u2111');
 760                         entities.Add ("real", '\u211C');
 761                         entities.Add ("trade", '\u2122');
 762                         entities.Add ("alefsym", '\u2135');
 763                         entities.Add ("larr", '\u2190');
 764                         entities.Add ("uarr", '\u2191');
 765                         entities.Add ("rarr", '\u2192');
 766                         entities.Add ("darr", '\u2193');
 767                         entities.Add ("harr", '\u2194');
 768                         entities.Add ("crarr", '\u21B5');
 769                         entities.Add ("lArr", '\u21D0');
 770                         entities.Add ("uArr", '\u21D1');
 771                         entities.Add ("rArr", '\u21D2');
 772                         entities.Add ("dArr", '\u21D3');
 773                         entities.Add ("hArr", '\u21D4');
 774                         entities.Add ("forall", '\u2200');
 775                         entities.Add ("part", '\u2202');
 776                         entities.Add ("exist", '\u2203');
 777                         entities.Add ("empty", '\u2205');
 778                         entities.Add ("nabla", '\u2207');
 779                         entities.Add ("isin", '\u2208');
 780                         entities.Add ("notin", '\u2209');
 781                         entities.Add ("ni", '\u220B');
 782                         entities.Add ("prod", '\u220F');
 783                         entities.Add ("sum", '\u2211');
 784                         entities.Add ("minus", '\u2212');
 785                         entities.Add ("lowast", '\u2217');
 786                         entities.Add ("radic", '\u221A');
 787                         entities.Add ("prop", '\u221D');
 788                         entities.Add ("infin", '\u221E');
 789                         entities.Add ("ang", '\u2220');
 790                         entities.Add ("and", '\u2227');
 791                         entities.Add ("or", '\u2228');
 792                         entities.Add ("cap", '\u2229');
 793                         entities.Add ("cup", '\u222A');
 794                         entities.Add ("int", '\u222B');
 795                         entities.Add ("there4", '\u2234');
 796                         entities.Add ("sim", '\u223C');
 797                         entities.Add ("cong", '\u2245');
 798                         entities.Add ("asymp", '\u2248');
 799                         entities.Add ("ne", '\u2260');
 800                         entities.Add ("equiv", '\u2261');
 801                         entities.Add ("le", '\u2264');
 802                         entities.Add ("ge", '\u2265');
 803                         entities.Add ("sub", '\u2282');
 804                         entities.Add ("sup", '\u2283');
 805                         entities.Add ("nsub", '\u2284');
 806                         entities.Add ("sube", '\u2286');
 807                         entities.Add ("supe", '\u2287');
 808                         entities.Add ("oplus", '\u2295');
 809                         entities.Add ("otimes", '\u2297');
 810                         entities.Add ("perp", '\u22A5');
 811                         entities.Add ("sdot", '\u22C5');
 812                         entities.Add ("lceil", '\u2308');
 813                         entities.Add ("rceil", '\u2309');
 814                         entities.Add ("lfloor", '\u230A');
 815                         entities.Add ("rfloor", '\u230B');
 816                         entities.Add ("lang", '\u2329');
 817                         entities.Add ("rang", '\u232A');
 818                         entities.Add ("loz", '\u25CA');
 819                         entities.Add ("spades", '\u2660');
 820                         entities.Add ("clubs", '\u2663');
 821                         entities.Add ("hearts", '\u2665');
 822                         entities.Add ("diams", '\u2666');
 823                         entities.Add ("quot", '\u0022');
 824                         entities.Add ("amp", '\u0026');
 825                         entities.Add ("lt", '\u003C');
 826                         entities.Add ("gt", '\u003E');
 827                         entities.Add ("OElig", '\u0152');
 828                         entities.Add ("oelig", '\u0153');
 829                         entities.Add ("Scaron", '\u0160');
 830                         entities.Add ("scaron", '\u0161');
 831                         entities.Add ("Yuml", '\u0178');
 832                         entities.Add ("circ", '\u02C6');
 833                         entities.Add ("tilde", '\u02DC');
 834                         entities.Add ("ensp", '\u2002');
 835                         entities.Add ("emsp", '\u2003');
 836                         entities.Add ("thinsp", '\u2009');
 837                         entities.Add ("zwnj", '\u200C');
 838                         entities.Add ("zwj", '\u200D');
 839                         entities.Add ("lrm", '\u200E');
 840                         entities.Add ("rlm", '\u200F');
 841                         entities.Add ("ndash", '\u2013');
 842                         entities.Add ("mdash", '\u2014');
 843                         entities.Add ("lsquo", '\u2018');
 844                         entities.Add ("rsquo", '\u2019');
 845                         entities.Add ("sbquo", '\u201A');
 846                         entities.Add ("ldquo", '\u201C');
 847                         entities.Add ("rdquo", '\u201D');
 848                         entities.Add ("bdquo", '\u201E');
 849                         entities.Add ("dagger", '\u2020');
 850                         entities.Add ("Dagger", '\u2021');
 851                         entities.Add ("permil", '\u2030');
 852                         entities.Add ("lsaquo", '\u2039');
 853                         entities.Add ("rsaquo", '\u203A');
 854                         entities.Add ("euro", '\u20AC');
 855                 }
 856         }
 857 }