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855 lines
24 KiB
C#
855 lines
24 KiB
C#
//
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// System.Web.HttpUtility
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//
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// Authors:
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// Patrik Torstensson (Patrik.Torstensson@labs2.com)
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// Wictor Wilén (decode/encode functions) (wictor@ibizkit.se)
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// Tim Coleman (tim@timcoleman.com)
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// Gonzalo Paniagua Javier (gonzalo@ximian.com)
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//
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Collections;
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using System.Globalization;
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using System.IO;
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using System.Text;
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// using System.Web.Util;
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namespace HtmlHelp.ChmDecoding
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{
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public sealed class HttpUtility {
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#region Fields
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const string _hex = "0123456789ABCDEF";
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const string _chars = "<>;:.?=&@*+%/\\";
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static Hashtable entities;
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static object lock_ = new object ();
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#endregion // Fields
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static Hashtable Entities {
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get {
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lock (lock_) {
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if (entities == null)
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InitEntities ();
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return entities;
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}
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}
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}
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#region Constructors
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static void InitEntities ()
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{
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// Build the hash table of HTML entity references. This list comes
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// from the HTML 4.01 W3C recommendation.
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entities = new Hashtable ();
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entities.Add ("nbsp", '\u00A0');
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entities.Add ("iexcl", '\u00A1');
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entities.Add ("cent", '\u00A2');
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entities.Add ("pound", '\u00A3');
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entities.Add ("curren", '\u00A4');
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entities.Add ("yen", '\u00A5');
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entities.Add ("brvbar", '\u00A6');
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entities.Add ("sect", '\u00A7');
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entities.Add ("uml", '\u00A8');
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entities.Add ("copy", '\u00A9');
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entities.Add ("ordf", '\u00AA');
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entities.Add ("laquo", '\u00AB');
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entities.Add ("not", '\u00AC');
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entities.Add ("shy", '\u00AD');
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entities.Add ("reg", '\u00AE');
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entities.Add ("macr", '\u00AF');
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entities.Add ("deg", '\u00B0');
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entities.Add ("plusmn", '\u00B1');
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entities.Add ("sup2", '\u00B2');
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entities.Add ("sup3", '\u00B3');
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entities.Add ("acute", '\u00B4');
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entities.Add ("micro", '\u00B5');
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entities.Add ("para", '\u00B6');
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entities.Add ("middot", '\u00B7');
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entities.Add ("cedil", '\u00B8');
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entities.Add ("sup1", '\u00B9');
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entities.Add ("ordm", '\u00BA');
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entities.Add ("raquo", '\u00BB');
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entities.Add ("frac14", '\u00BC');
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entities.Add ("frac12", '\u00BD');
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entities.Add ("frac34", '\u00BE');
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entities.Add ("iquest", '\u00BF');
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entities.Add ("Agrave", '\u00C0');
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entities.Add ("Aacute", '\u00C1');
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entities.Add ("Acirc", '\u00C2');
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entities.Add ("Atilde", '\u00C3');
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entities.Add ("Auml", '\u00C4');
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entities.Add ("Aring", '\u00C5');
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entities.Add ("AElig", '\u00C6');
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entities.Add ("Ccedil", '\u00C7');
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entities.Add ("Egrave", '\u00C8');
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entities.Add ("Eacute", '\u00C9');
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entities.Add ("Ecirc", '\u00CA');
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entities.Add ("Euml", '\u00CB');
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entities.Add ("Igrave", '\u00CC');
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entities.Add ("Iacute", '\u00CD');
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entities.Add ("Icirc", '\u00CE');
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entities.Add ("Iuml", '\u00CF');
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entities.Add ("ETH", '\u00D0');
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entities.Add ("Ntilde", '\u00D1');
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entities.Add ("Ograve", '\u00D2');
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entities.Add ("Oacute", '\u00D3');
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entities.Add ("Ocirc", '\u00D4');
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entities.Add ("Otilde", '\u00D5');
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entities.Add ("Ouml", '\u00D6');
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entities.Add ("times", '\u00D7');
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entities.Add ("Oslash", '\u00D8');
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entities.Add ("Ugrave", '\u00D9');
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entities.Add ("Uacute", '\u00DA');
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entities.Add ("Ucirc", '\u00DB');
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entities.Add ("Uuml", '\u00DC');
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entities.Add ("Yacute", '\u00DD');
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entities.Add ("THORN", '\u00DE');
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entities.Add ("szlig", '\u00DF');
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entities.Add ("agrave", '\u00E0');
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entities.Add ("aacute", '\u00E1');
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entities.Add ("acirc", '\u00E2');
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entities.Add ("atilde", '\u00E3');
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entities.Add ("auml", '\u00E4');
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entities.Add ("aring", '\u00E5');
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entities.Add ("aelig", '\u00E6');
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entities.Add ("ccedil", '\u00E7');
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entities.Add ("egrave", '\u00E8');
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entities.Add ("eacute", '\u00E9');
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entities.Add ("ecirc", '\u00EA');
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entities.Add ("euml", '\u00EB');
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entities.Add ("igrave", '\u00EC');
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entities.Add ("iacute", '\u00ED');
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entities.Add ("icirc", '\u00EE');
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entities.Add ("iuml", '\u00EF');
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entities.Add ("eth", '\u00F0');
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entities.Add ("ntilde", '\u00F1');
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entities.Add ("ograve", '\u00F2');
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entities.Add ("oacute", '\u00F3');
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entities.Add ("ocirc", '\u00F4');
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entities.Add ("otilde", '\u00F5');
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entities.Add ("ouml", '\u00F6');
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entities.Add ("divide", '\u00F7');
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entities.Add ("oslash", '\u00F8');
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entities.Add ("ugrave", '\u00F9');
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entities.Add ("uacute", '\u00FA');
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entities.Add ("ucirc", '\u00FB');
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entities.Add ("uuml", '\u00FC');
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entities.Add ("yacute", '\u00FD');
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entities.Add ("thorn", '\u00FE');
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entities.Add ("yuml", '\u00FF');
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entities.Add ("fnof", '\u0192');
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entities.Add ("Alpha", '\u0391');
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entities.Add ("Beta", '\u0392');
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entities.Add ("Gamma", '\u0393');
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entities.Add ("Delta", '\u0394');
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entities.Add ("Epsilon", '\u0395');
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entities.Add ("Zeta", '\u0396');
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entities.Add ("Eta", '\u0397');
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entities.Add ("Theta", '\u0398');
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entities.Add ("Iota", '\u0399');
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entities.Add ("Kappa", '\u039A');
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entities.Add ("Lambda", '\u039B');
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entities.Add ("Mu", '\u039C');
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entities.Add ("Nu", '\u039D');
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entities.Add ("Xi", '\u039E');
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entities.Add ("Omicron", '\u039F');
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entities.Add ("Pi", '\u03A0');
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entities.Add ("Rho", '\u03A1');
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entities.Add ("Sigma", '\u03A3');
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entities.Add ("Tau", '\u03A4');
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entities.Add ("Upsilon", '\u03A5');
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entities.Add ("Phi", '\u03A6');
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entities.Add ("Chi", '\u03A7');
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entities.Add ("Psi", '\u03A8');
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entities.Add ("Omega", '\u03A9');
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entities.Add ("alpha", '\u03B1');
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entities.Add ("beta", '\u03B2');
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entities.Add ("gamma", '\u03B3');
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entities.Add ("delta", '\u03B4');
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entities.Add ("epsilon", '\u03B5');
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entities.Add ("zeta", '\u03B6');
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entities.Add ("eta", '\u03B7');
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entities.Add ("theta", '\u03B8');
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entities.Add ("iota", '\u03B9');
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entities.Add ("kappa", '\u03BA');
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entities.Add ("lambda", '\u03BB');
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entities.Add ("mu", '\u03BC');
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entities.Add ("nu", '\u03BD');
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entities.Add ("xi", '\u03BE');
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entities.Add ("omicron", '\u03BF');
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entities.Add ("pi", '\u03C0');
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entities.Add ("rho", '\u03C1');
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entities.Add ("sigmaf", '\u03C2');
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entities.Add ("sigma", '\u03C3');
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entities.Add ("tau", '\u03C4');
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entities.Add ("upsilon", '\u03C5');
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entities.Add ("phi", '\u03C6');
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entities.Add ("chi", '\u03C7');
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entities.Add ("psi", '\u03C8');
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entities.Add ("omega", '\u03C9');
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entities.Add ("thetasym", '\u03D1');
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entities.Add ("upsih", '\u03D2');
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entities.Add ("piv", '\u03D6');
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entities.Add ("bull", '\u2022');
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entities.Add ("hellip", '\u2026');
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entities.Add ("prime", '\u2032');
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entities.Add ("Prime", '\u2033');
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entities.Add ("oline", '\u203E');
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entities.Add ("frasl", '\u2044');
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entities.Add ("weierp", '\u2118');
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entities.Add ("image", '\u2111');
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entities.Add ("real", '\u211C');
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entities.Add ("trade", '\u2122');
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entities.Add ("alefsym", '\u2135');
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entities.Add ("larr", '\u2190');
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entities.Add ("uarr", '\u2191');
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entities.Add ("rarr", '\u2192');
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entities.Add ("darr", '\u2193');
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entities.Add ("harr", '\u2194');
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entities.Add ("crarr", '\u21B5');
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entities.Add ("lArr", '\u21D0');
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entities.Add ("uArr", '\u21D1');
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entities.Add ("rArr", '\u21D2');
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entities.Add ("dArr", '\u21D3');
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entities.Add ("hArr", '\u21D4');
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entities.Add ("forall", '\u2200');
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entities.Add ("part", '\u2202');
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entities.Add ("exist", '\u2203');
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entities.Add ("empty", '\u2205');
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entities.Add ("nabla", '\u2207');
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entities.Add ("isin", '\u2208');
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entities.Add ("notin", '\u2209');
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entities.Add ("ni", '\u220B');
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entities.Add ("prod", '\u220F');
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entities.Add ("sum", '\u2211');
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entities.Add ("minus", '\u2212');
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entities.Add ("lowast", '\u2217');
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entities.Add ("radic", '\u221A');
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entities.Add ("prop", '\u221D');
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entities.Add ("infin", '\u221E');
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entities.Add ("ang", '\u2220');
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entities.Add ("and", '\u2227');
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entities.Add ("or", '\u2228');
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entities.Add ("cap", '\u2229');
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entities.Add ("cup", '\u222A');
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entities.Add ("int", '\u222B');
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entities.Add ("there4", '\u2234');
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entities.Add ("sim", '\u223C');
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entities.Add ("cong", '\u2245');
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entities.Add ("asymp", '\u2248');
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entities.Add ("ne", '\u2260');
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entities.Add ("equiv", '\u2261');
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entities.Add ("le", '\u2264');
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entities.Add ("ge", '\u2265');
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entities.Add ("sub", '\u2282');
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entities.Add ("sup", '\u2283');
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entities.Add ("nsub", '\u2284');
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entities.Add ("sube", '\u2286');
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entities.Add ("supe", '\u2287');
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entities.Add ("oplus", '\u2295');
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entities.Add ("otimes", '\u2297');
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entities.Add ("perp", '\u22A5');
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entities.Add ("sdot", '\u22C5');
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entities.Add ("lceil", '\u2308');
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entities.Add ("rceil", '\u2309');
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entities.Add ("lfloor", '\u230A');
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entities.Add ("rfloor", '\u230B');
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entities.Add ("lang", '\u2329');
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entities.Add ("rang", '\u232A');
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entities.Add ("loz", '\u25CA');
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entities.Add ("spades", '\u2660');
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entities.Add ("clubs", '\u2663');
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entities.Add ("hearts", '\u2665');
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entities.Add ("diams", '\u2666');
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entities.Add ("quot", '\u0022');
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entities.Add ("amp", '\u0026');
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entities.Add ("lt", '\u003C');
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entities.Add ("gt", '\u003E');
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entities.Add ("OElig", '\u0152');
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entities.Add ("oelig", '\u0153');
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entities.Add ("Scaron", '\u0160');
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entities.Add ("scaron", '\u0161');
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entities.Add ("Yuml", '\u0178');
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entities.Add ("circ", '\u02C6');
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entities.Add ("tilde", '\u02DC');
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entities.Add ("ensp", '\u2002');
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entities.Add ("emsp", '\u2003');
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entities.Add ("thinsp", '\u2009');
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entities.Add ("zwnj", '\u200C');
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entities.Add ("zwj", '\u200D');
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entities.Add ("lrm", '\u200E');
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entities.Add ("rlm", '\u200F');
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entities.Add ("ndash", '\u2013');
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entities.Add ("mdash", '\u2014');
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entities.Add ("lsquo", '\u2018');
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entities.Add ("rsquo", '\u2019');
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entities.Add ("sbquo", '\u201A');
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entities.Add ("ldquo", '\u201C');
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entities.Add ("rdquo", '\u201D');
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entities.Add ("bdquo", '\u201E');
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entities.Add ("dagger", '\u2020');
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entities.Add ("Dagger", '\u2021');
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entities.Add ("permil", '\u2030');
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entities.Add ("lsaquo", '\u2039');
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entities.Add ("rsaquo", '\u203A');
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entities.Add ("euro", '\u20AC');
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}
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public HttpUtility ()
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{
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}
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#endregion // Constructors
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#region Methods
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public static void HtmlAttributeEncode (string s, TextWriter output)
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{
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output.Write(HtmlAttributeEncode(s));
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}
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public static string HtmlAttributeEncode (string s)
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{
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if (null == s)
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return null;
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if (s.IndexOf ('&') == -1 && s.IndexOf ('"') == -1)
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return s;
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StringBuilder output = new StringBuilder ();
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foreach (char c in s)
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switch (c) {
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case '&' :
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output.Append ("&");
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break;
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case '"' :
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output.Append (""");
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break;
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default:
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output.Append (c);
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break;
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}
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return output.ToString();
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}
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public static string UrlDecode (string str)
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{
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return UrlDecode(str, Encoding.UTF8);
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}
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private static char [] GetChars (MemoryStream b, Encoding e)
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{
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return e.GetChars (b.GetBuffer (), 0, (int) b.Length);
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}
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public static string UrlDecode (string s, Encoding e)
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{
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if (null == s)
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return null;
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if (s.IndexOf ('%') == -1 && s.IndexOf ('+') == -1)
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return s;
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if (e == null)
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e = Encoding.UTF8;
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StringBuilder output = new StringBuilder ();
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long len = s.Length;
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NumberStyles hexa = NumberStyles.HexNumber;
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MemoryStream bytes = new MemoryStream ();
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for (int i = 0; i < len; i++) {
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if (s [i] == '%' && i + 2 < len) {
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if (s [i + 1] == 'u' && i + 5 < len) {
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if (bytes.Length > 0) {
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output.Append (GetChars (bytes, e));
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bytes.SetLength (0);
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}
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output.Append ((char) Int32.Parse (s.Substring (i + 2, 4), hexa));
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i += 5;
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} else {
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bytes.WriteByte ((byte) Int32.Parse (s.Substring (i + 1, 2), hexa));
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i += 2;
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}
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continue;
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}
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if (bytes.Length > 0) {
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output.Append (GetChars (bytes, e));
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bytes.SetLength (0);
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}
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if (s [i] == '+') {
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output.Append (' ');
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} else {
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output.Append (s [i]);
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}
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}
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if (bytes.Length > 0) {
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output.Append (GetChars (bytes, e));
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}
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bytes = null;
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return output.ToString ();
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}
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public static string UrlDecode (byte [] bytes, Encoding e)
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{
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if (bytes == null)
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return null;
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return UrlDecode (bytes, 0, bytes.Length, e);
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}
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private static int GetInt (byte b)
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{
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char c = Char.ToUpper ((char) b);
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if (c >= '0' && c <= '9')
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return c - '0';
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if (c < 'A' || c > 'F')
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return 0;
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return (c - 'A' + 10);
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}
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private static char GetChar (byte [] bytes, int offset, int length)
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{
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int value = 0;
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int end = length + offset;
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for (int i = offset; i < end; i++)
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value = (value << 4) + GetInt (bytes [offset]);
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return (char) value;
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}
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public static string UrlDecode (byte [] bytes, int offset, int count, Encoding e)
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{
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if (bytes == null || count == 0)
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return null;
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if (bytes == null)
|
|
throw new ArgumentNullException ("bytes");
|
|
|
|
if (offset < 0 || offset > bytes.Length)
|
|
throw new ArgumentOutOfRangeException ("offset");
|
|
|
|
if (count < 0 || offset + count > bytes.Length)
|
|
throw new ArgumentOutOfRangeException ("count");
|
|
|
|
StringBuilder output = new StringBuilder ();
|
|
MemoryStream acc = new MemoryStream ();
|
|
|
|
int end = count + offset;
|
|
for (int i = offset; i < end; i++) {
|
|
if (bytes [i] == '%' && i + 2 < count) {
|
|
if (bytes [i + 1] == (byte) 'u' && i + 5 < end) {
|
|
if (acc.Length > 0) {
|
|
output.Append (GetChars (acc, e));
|
|
acc.SetLength (0);
|
|
}
|
|
output.Append (GetChar (bytes, offset + 2, 4));
|
|
i += 5;
|
|
} else {
|
|
acc.WriteByte ((byte) GetChar (bytes, offset + 1, 2));
|
|
i += 2;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (acc.Length > 0) {
|
|
output.Append (GetChars (acc, e));
|
|
acc.SetLength (0);
|
|
}
|
|
|
|
if (bytes [i] == '+') {
|
|
output.Append (' ');
|
|
} else {
|
|
output.Append ((char) bytes [i]);
|
|
}
|
|
}
|
|
|
|
if (acc.Length > 0) {
|
|
output.Append (GetChars (acc, e));
|
|
}
|
|
|
|
acc = null;
|
|
return output.ToString ();
|
|
}
|
|
|
|
public static byte [] UrlDecodeToBytes (byte [] bytes)
|
|
{
|
|
if (bytes == null)
|
|
return null;
|
|
|
|
return UrlDecodeToBytes (bytes, 0, bytes.Length);
|
|
}
|
|
|
|
public static byte [] UrlDecodeToBytes (string str)
|
|
{
|
|
return UrlDecodeToBytes (str, Encoding.UTF8);
|
|
}
|
|
|
|
public static byte [] UrlDecodeToBytes (string str, Encoding e)
|
|
{
|
|
if (str == null)
|
|
return null;
|
|
|
|
if (e == null)
|
|
throw new ArgumentNullException ("e");
|
|
|
|
return UrlDecodeToBytes (e.GetBytes (str));
|
|
}
|
|
|
|
public static byte [] UrlDecodeToBytes (byte [] bytes, int offset, int count)
|
|
{
|
|
if (bytes == null)
|
|
return null;
|
|
|
|
int len = bytes.Length;
|
|
if (offset < 0 || offset >= len)
|
|
throw new ArgumentOutOfRangeException("offset");
|
|
|
|
if (count < 0 || offset > len - count)
|
|
throw new ArgumentOutOfRangeException("count");
|
|
|
|
MemoryStream result = new MemoryStream ();
|
|
int end = offset + count;
|
|
for (int i = offset; i < end; i++){
|
|
char c = (char) bytes [i];
|
|
if (c == '+')
|
|
c = ' ';
|
|
else if (c == '%' && i < end - 2) {
|
|
c = GetChar (bytes, i, 2);
|
|
i += 2;
|
|
}
|
|
result.WriteByte ((byte) c);
|
|
}
|
|
|
|
return result.ToArray ();
|
|
}
|
|
|
|
public static string UrlEncode(string str)
|
|
{
|
|
return UrlEncode(str, Encoding.UTF8);
|
|
}
|
|
|
|
public static string UrlEncode (string s, Encoding Enc)
|
|
{
|
|
if (s == null)
|
|
return null;
|
|
|
|
if (s == "")
|
|
return "";
|
|
|
|
byte [] bytes = Enc.GetBytes (s);
|
|
byte [] b =UrlEncodeToBytes (bytes, 0, bytes.Length);
|
|
return Encoding.ASCII.GetString (b,0,b.Length);
|
|
}
|
|
|
|
public static string UrlEncode (byte [] bytes)
|
|
{
|
|
if (bytes == null)
|
|
return null;
|
|
|
|
if (bytes.Length == 0)
|
|
return "";
|
|
|
|
byte []b=UrlEncodeToBytes(bytes, 0, bytes.Length);
|
|
return Encoding.ASCII.GetString (b,0,b.Length);
|
|
}
|
|
|
|
public static string UrlEncode (byte [] bytes, int offset, int count)
|
|
{
|
|
if (bytes == null)
|
|
return null;
|
|
|
|
if (bytes.Length == 0)
|
|
return "";
|
|
|
|
byte []b=UrlEncodeToBytes(bytes, offset, count);
|
|
return Encoding.ASCII.GetString (b,0,b.Length);
|
|
}
|
|
|
|
public static byte [] UrlEncodeToBytes (string str)
|
|
{
|
|
return UrlEncodeToBytes (str, Encoding.UTF8);
|
|
}
|
|
|
|
public static byte [] UrlEncodeToBytes (string str, Encoding e)
|
|
{
|
|
if (str == null)
|
|
return null;
|
|
|
|
if (str == "")
|
|
return new byte [0];
|
|
|
|
byte [] bytes = e.GetBytes (str);
|
|
return UrlEncodeToBytes (bytes, 0, bytes.Length);
|
|
}
|
|
|
|
public static byte [] UrlEncodeToBytes (byte [] bytes)
|
|
{
|
|
if (bytes == null)
|
|
return null;
|
|
|
|
if (bytes.Length == 0)
|
|
return new byte [0];
|
|
|
|
return UrlEncodeToBytes (bytes, 0, bytes.Length);
|
|
}
|
|
|
|
static char [] hexChars = "0123456789abcdef".ToCharArray ();
|
|
|
|
public static byte [] UrlEncodeToBytes (byte [] bytes, int offset, int count)
|
|
{
|
|
if (bytes == null)
|
|
return null;
|
|
|
|
int len = bytes.Length;
|
|
if (len == 0)
|
|
return new byte [0];
|
|
|
|
if (offset < 0 || offset >= len)
|
|
throw new ArgumentOutOfRangeException("offset");
|
|
|
|
if (count < 0 || count > len - offset)
|
|
throw new ArgumentOutOfRangeException("count");
|
|
|
|
MemoryStream result = new MemoryStream ();
|
|
int end = offset + count;
|
|
for (int i = offset; i < end; i++) {
|
|
char c = (char) bytes [i];
|
|
if ((c == ' ') || (c < '0' && c != '-' && c != '.') ||
|
|
(c < 'A' && c > '9') ||
|
|
(c > 'Z' && c < 'a' && c != '_') ||
|
|
(c > 'z')) {
|
|
result.WriteByte ((byte) '%');
|
|
int idx = ((int) c) >> 4;
|
|
result.WriteByte ((byte) hexChars [idx]);
|
|
idx = ((int) c) & 0x0F;
|
|
result.WriteByte ((byte) hexChars [idx]);
|
|
} else {
|
|
result.WriteByte ((byte) c);
|
|
}
|
|
}
|
|
|
|
return result.ToArray ();
|
|
}
|
|
|
|
public static string UrlEncodeUnicode (string str)
|
|
{
|
|
if (str == null)
|
|
return null;
|
|
|
|
StringBuilder result = new StringBuilder ();
|
|
int end = str.Length;
|
|
for (int i = 0; i < end; i++) {
|
|
int idx;
|
|
char c = str [i];
|
|
if (c > 255) {
|
|
result.Append ("%u");
|
|
idx = ((int) c) >> 24;
|
|
result.Append (hexChars [idx]);
|
|
idx = (((int) c) >> 16) & 0x0F;
|
|
result.Append (hexChars [idx]);
|
|
idx = (((int) c) >> 8) & 0x0F;
|
|
result.Append (hexChars [idx]);
|
|
idx = ((int) c) & 0x0F;
|
|
result.Append (hexChars [idx]);
|
|
continue;
|
|
}
|
|
|
|
if ((c == ' ') || (c < '0' && c != '-' && c != '.') ||
|
|
(c < 'A' && c > '9') ||
|
|
(c > 'Z' && c < 'a' && c != '_') ||
|
|
(c > 'z')) {
|
|
result.Append ('%');
|
|
idx = ((int) c) >> 4;
|
|
result.Append (hexChars [idx]);
|
|
idx = ((int) c) & 0x0F;
|
|
result.Append (hexChars [idx]);
|
|
continue;
|
|
}
|
|
|
|
result.Append (c);
|
|
}
|
|
|
|
return result.ToString ();
|
|
}
|
|
|
|
public static byte [] UrlEncodeUnicodeToBytes (string str)
|
|
{
|
|
if (str == null)
|
|
return null;
|
|
|
|
if (str == "")
|
|
return new byte [0];
|
|
|
|
return Encoding.ASCII.GetBytes (UrlEncodeUnicode (str));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Decodes an HTML-encoded string and returns the decoded string.
|
|
/// </summary>
|
|
/// <param name="s">The HTML string to decode. </param>
|
|
/// <returns>The decoded text.</returns>
|
|
public static string HtmlDecode (string s)
|
|
{
|
|
if (s == null)
|
|
throw new ArgumentNullException ("s");
|
|
|
|
if (s.IndexOf ('&') == -1)
|
|
return s;
|
|
|
|
bool insideEntity = false; // used to indicate that we are in a potential entity
|
|
string entity = String.Empty;
|
|
StringBuilder output = new StringBuilder ();
|
|
int len = s.Length;
|
|
|
|
for (int i = 0; i < len; i++) {
|
|
char c = s [i];
|
|
switch (c) {
|
|
case '&' :
|
|
output.Append (entity);
|
|
entity = "&";
|
|
insideEntity = true;
|
|
break;
|
|
case ';' :
|
|
if (!insideEntity) {
|
|
output.Append (c);
|
|
break;
|
|
}
|
|
|
|
entity += c;
|
|
int length = entity.Length;
|
|
if (length >= 2 && entity[1] == '#' && entity[2] != ';')
|
|
entity = ((char) Int32.Parse (entity.Substring (2, entity.Length - 3))).ToString();
|
|
else if (length > 1 && Entities.ContainsKey (entity.Substring (1, entity.Length - 2)))
|
|
entity = Entities [entity.Substring (1, entity.Length - 2)].ToString ();
|
|
|
|
output.Append (entity);
|
|
entity = String.Empty;
|
|
insideEntity = false;
|
|
break;
|
|
default :
|
|
if (insideEntity)
|
|
entity += c;
|
|
else
|
|
output.Append (c);
|
|
break;
|
|
}
|
|
}
|
|
output.Append (entity);
|
|
return output.ToString ();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Decodes an HTML-encoded string and sends the resulting output to a TextWriter output stream.
|
|
/// </summary>
|
|
/// <param name="s">The HTML string to decode</param>
|
|
/// <param name="output">The TextWriter output stream containing the decoded string. </param>
|
|
public static void HtmlDecode(string s, TextWriter output)
|
|
{
|
|
if (s != null)
|
|
output.Write (HtmlDecode (s));
|
|
}
|
|
|
|
/// <summary>
|
|
/// HTML-encodes a string and returns the encoded string.
|
|
/// </summary>
|
|
/// <param name="s">The text string to encode. </param>
|
|
/// <returns>The HTML-encoded text.</returns>
|
|
public static string HtmlEncode (string s)
|
|
{
|
|
if (s == null)
|
|
return null;
|
|
|
|
StringBuilder output = new StringBuilder ();
|
|
|
|
foreach (char c in s)
|
|
switch (c) {
|
|
case '&' :
|
|
output.Append ("&");
|
|
break;
|
|
case '>' :
|
|
output.Append (">");
|
|
break;
|
|
case '<' :
|
|
output.Append ("<");
|
|
break;
|
|
case '"' :
|
|
output.Append (""");
|
|
break;
|
|
default:
|
|
if ((int) c > 128) {
|
|
output.Append ("&#");
|
|
output.Append (((int) c).ToString ());
|
|
output.Append (";");
|
|
}
|
|
else
|
|
output.Append (c);
|
|
break;
|
|
}
|
|
return output.ToString ();
|
|
}
|
|
|
|
/// <summary>
|
|
/// HTML-encodes a string and sends the resulting output to a TextWriter output stream.
|
|
/// </summary>
|
|
/// <param name="s">The string to encode. </param>
|
|
/// <param name="output">The TextWriter output stream containing the encoded string. </param>
|
|
public static void HtmlEncode(string s, TextWriter output)
|
|
{
|
|
if (s != null)
|
|
output.Write (HtmlEncode (s));
|
|
}
|
|
|
|
#if NET_1_1
|
|
public string UrlPathEncode (string s)
|
|
{
|
|
if (s == null)
|
|
return null;
|
|
|
|
int idx = s.IndexOf ("?");
|
|
string s2 = null;
|
|
if (idx != -1) {
|
|
s2 = s.Substring (0, idx-1);
|
|
s2 = UrlEncode (s2) + s.Substring (idx);
|
|
} else {
|
|
s2 = UrlEncode (s);
|
|
}
|
|
|
|
return s2;
|
|
}
|
|
#endif
|
|
#endregion // Methods
|
|
}
|
|
}
|