-// \r
-// System.Web.HttpUtility\r
-//\r
-// Authors:\r
-// Patrik Torstensson (Patrik.Torstensson@labs2.com)\r
-// Wictor Wilén (decode/encode functions) (wictor@ibizkit.se)\r
-// Tim Coleman (tim@timcoleman.com)\r
-// Gonzalo Paniagua Javier (gonzalo@ximian.com)\r
-//\r
-
+//
+// System.Web.HttpUtility
+//
+// Authors:
+// Patrik Torstensson (Patrik.Torstensson@labs2.com)
+// Wictor Wilén (decode/encode functions) (wictor@ibizkit.se)
+// Tim Coleman (tim@timcoleman.com)
+// Gonzalo Paniagua Javier (gonzalo@ximian.com)
+//
+// Copyright (C) 2005 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
-using System;\r
-using System.Collections;\r
-using System.Globalization;\r
-using System.IO;\r
-using System.Text;\r
-using System.Web.Util;\r
-\r
-namespace System.Web {\r
- public sealed class HttpUtility {\r
-\r
- #region Fields\r
- \r
- static Hashtable entities;\r
- static object lock_ = new object ();\r
- \r
- #endregion // Fields\r
- \r
- static Hashtable Entities {\r
- get {\r
- lock (lock_) {\r
- if (entities == null)\r
- InitEntities ();\r
-\r
- return entities;\r
- }\r
- }\r
- }\r
- \r
- #region Constructors\r
-\r
- static void InitEntities ()\r
- {\r
- // Build the hash table of HTML entity references. This list comes\r
- // from the HTML 4.01 W3C recommendation.\r
- entities = new Hashtable ();\r
- entities.Add ("nbsp", '\u00A0');\r
- entities.Add ("iexcl", '\u00A1');\r
- entities.Add ("cent", '\u00A2');\r
- entities.Add ("pound", '\u00A3');\r
- entities.Add ("curren", '\u00A4');\r
- entities.Add ("yen", '\u00A5');\r
- entities.Add ("brvbar", '\u00A6');\r
- entities.Add ("sect", '\u00A7');\r
- entities.Add ("uml", '\u00A8');\r
- entities.Add ("copy", '\u00A9');\r
- entities.Add ("ordf", '\u00AA');\r
- entities.Add ("laquo", '\u00AB');\r
- entities.Add ("not", '\u00AC');\r
- entities.Add ("shy", '\u00AD');\r
- entities.Add ("reg", '\u00AE');\r
- entities.Add ("macr", '\u00AF');\r
- entities.Add ("deg", '\u00B0');\r
- entities.Add ("plusmn", '\u00B1');\r
- entities.Add ("sup2", '\u00B2');\r
- entities.Add ("sup3", '\u00B3');\r
- entities.Add ("acute", '\u00B4');\r
- entities.Add ("micro", '\u00B5');\r
- entities.Add ("para", '\u00B6');\r
- entities.Add ("middot", '\u00B7');\r
- entities.Add ("cedil", '\u00B8');\r
- entities.Add ("sup1", '\u00B9');\r
- entities.Add ("ordm", '\u00BA');\r
- entities.Add ("raquo", '\u00BB');\r
- entities.Add ("frac14", '\u00BC');\r
- entities.Add ("frac12", '\u00BD');\r
- entities.Add ("frac34", '\u00BE');\r
- entities.Add ("iquest", '\u00BF');\r
- entities.Add ("Agrave", '\u00C0');\r
- entities.Add ("Aacute", '\u00C1');\r
- entities.Add ("Acirc", '\u00C2');\r
- entities.Add ("Atilde", '\u00C3');\r
- entities.Add ("Auml", '\u00C4');\r
- entities.Add ("Aring", '\u00C5');\r
- entities.Add ("AElig", '\u00C6');\r
- entities.Add ("Ccedil", '\u00C7');\r
- entities.Add ("Egrave", '\u00C8');\r
- entities.Add ("Eacute", '\u00C9');\r
- entities.Add ("Ecirc", '\u00CA');\r
- entities.Add ("Euml", '\u00CB');\r
- entities.Add ("Igrave", '\u00CC');\r
- entities.Add ("Iacute", '\u00CD');\r
- entities.Add ("Icirc", '\u00CE');\r
- entities.Add ("Iuml", '\u00CF');\r
- entities.Add ("ETH", '\u00D0');\r
- entities.Add ("Ntilde", '\u00D1');\r
- entities.Add ("Ograve", '\u00D2');\r
- entities.Add ("Oacute", '\u00D3');\r
- entities.Add ("Ocirc", '\u00D4');\r
- entities.Add ("Otilde", '\u00D5');\r
- entities.Add ("Ouml", '\u00D6');\r
- entities.Add ("times", '\u00D7');\r
- entities.Add ("Oslash", '\u00D8');\r
- entities.Add ("Ugrave", '\u00D9');\r
- entities.Add ("Uacute", '\u00DA');\r
- entities.Add ("Ucirc", '\u00DB');\r
- entities.Add ("Uuml", '\u00DC');\r
- entities.Add ("Yacute", '\u00DD');\r
- entities.Add ("THORN", '\u00DE');\r
- entities.Add ("szlig", '\u00DF');\r
- entities.Add ("agrave", '\u00E0');\r
- entities.Add ("aacute", '\u00E1');\r
- entities.Add ("acirc", '\u00E2');\r
- entities.Add ("atilde", '\u00E3');\r
- entities.Add ("auml", '\u00E4');\r
- entities.Add ("aring", '\u00E5');\r
- entities.Add ("aelig", '\u00E6');\r
- entities.Add ("ccedil", '\u00E7');\r
- entities.Add ("egrave", '\u00E8');\r
- entities.Add ("eacute", '\u00E9');\r
- entities.Add ("ecirc", '\u00EA');\r
- entities.Add ("euml", '\u00EB');\r
- entities.Add ("igrave", '\u00EC');\r
- entities.Add ("iacute", '\u00ED');\r
- entities.Add ("icirc", '\u00EE');\r
- entities.Add ("iuml", '\u00EF');\r
- entities.Add ("eth", '\u00F0');\r
- entities.Add ("ntilde", '\u00F1');\r
- entities.Add ("ograve", '\u00F2');\r
- entities.Add ("oacute", '\u00F3');\r
- entities.Add ("ocirc", '\u00F4');\r
- entities.Add ("otilde", '\u00F5');\r
- entities.Add ("ouml", '\u00F6');\r
- entities.Add ("divide", '\u00F7');\r
- entities.Add ("oslash", '\u00F8');\r
- entities.Add ("ugrave", '\u00F9');\r
- entities.Add ("uacute", '\u00FA');\r
- entities.Add ("ucirc", '\u00FB');\r
- entities.Add ("uuml", '\u00FC');\r
- entities.Add ("yacute", '\u00FD');\r
- entities.Add ("thorn", '\u00FE');\r
- entities.Add ("yuml", '\u00FF');\r
- entities.Add ("fnof", '\u0192');\r
- entities.Add ("Alpha", '\u0391');\r
- entities.Add ("Beta", '\u0392');\r
- entities.Add ("Gamma", '\u0393');\r
- entities.Add ("Delta", '\u0394');\r
- entities.Add ("Epsilon", '\u0395');\r
- entities.Add ("Zeta", '\u0396');\r
- entities.Add ("Eta", '\u0397');\r
- entities.Add ("Theta", '\u0398');\r
- entities.Add ("Iota", '\u0399');\r
- entities.Add ("Kappa", '\u039A');\r
- entities.Add ("Lambda", '\u039B');\r
- entities.Add ("Mu", '\u039C');\r
- entities.Add ("Nu", '\u039D');\r
- entities.Add ("Xi", '\u039E');\r
- entities.Add ("Omicron", '\u039F');\r
- entities.Add ("Pi", '\u03A0');\r
- entities.Add ("Rho", '\u03A1');\r
- entities.Add ("Sigma", '\u03A3');\r
- entities.Add ("Tau", '\u03A4');\r
- entities.Add ("Upsilon", '\u03A5');\r
- entities.Add ("Phi", '\u03A6');\r
- entities.Add ("Chi", '\u03A7');\r
- entities.Add ("Psi", '\u03A8');\r
- entities.Add ("Omega", '\u03A9');\r
- entities.Add ("alpha", '\u03B1');\r
- entities.Add ("beta", '\u03B2');\r
- entities.Add ("gamma", '\u03B3');\r
- entities.Add ("delta", '\u03B4');\r
- entities.Add ("epsilon", '\u03B5');\r
- entities.Add ("zeta", '\u03B6');\r
- entities.Add ("eta", '\u03B7');\r
- entities.Add ("theta", '\u03B8');\r
- entities.Add ("iota", '\u03B9');\r
- entities.Add ("kappa", '\u03BA');\r
- entities.Add ("lambda", '\u03BB');\r
- entities.Add ("mu", '\u03BC');\r
- entities.Add ("nu", '\u03BD');\r
- entities.Add ("xi", '\u03BE');\r
- entities.Add ("omicron", '\u03BF');\r
- entities.Add ("pi", '\u03C0');\r
- entities.Add ("rho", '\u03C1');\r
- entities.Add ("sigmaf", '\u03C2');\r
- entities.Add ("sigma", '\u03C3');\r
- entities.Add ("tau", '\u03C4');\r
- entities.Add ("upsilon", '\u03C5');\r
- entities.Add ("phi", '\u03C6');\r
- entities.Add ("chi", '\u03C7');\r
- entities.Add ("psi", '\u03C8');\r
- entities.Add ("omega", '\u03C9');\r
- entities.Add ("thetasym", '\u03D1');\r
- entities.Add ("upsih", '\u03D2');\r
- entities.Add ("piv", '\u03D6');\r
- entities.Add ("bull", '\u2022');\r
- entities.Add ("hellip", '\u2026');\r
- entities.Add ("prime", '\u2032');\r
- entities.Add ("Prime", '\u2033');\r
- entities.Add ("oline", '\u203E');\r
- entities.Add ("frasl", '\u2044');\r
- entities.Add ("weierp", '\u2118');\r
- entities.Add ("image", '\u2111');\r
- entities.Add ("real", '\u211C');\r
- entities.Add ("trade", '\u2122');\r
- entities.Add ("alefsym", '\u2135');\r
- entities.Add ("larr", '\u2190');\r
- entities.Add ("uarr", '\u2191');\r
- entities.Add ("rarr", '\u2192');\r
- entities.Add ("darr", '\u2193');\r
- entities.Add ("harr", '\u2194');\r
- entities.Add ("crarr", '\u21B5');\r
- entities.Add ("lArr", '\u21D0');\r
- entities.Add ("uArr", '\u21D1');\r
- entities.Add ("rArr", '\u21D2');\r
- entities.Add ("dArr", '\u21D3');\r
- entities.Add ("hArr", '\u21D4');\r
- entities.Add ("forall", '\u2200');\r
- entities.Add ("part", '\u2202');\r
- entities.Add ("exist", '\u2203');\r
- entities.Add ("empty", '\u2205');\r
- entities.Add ("nabla", '\u2207');\r
- entities.Add ("isin", '\u2208');\r
- entities.Add ("notin", '\u2209');\r
- entities.Add ("ni", '\u220B');\r
- entities.Add ("prod", '\u220F');\r
- entities.Add ("sum", '\u2211');\r
- entities.Add ("minus", '\u2212');\r
- entities.Add ("lowast", '\u2217');\r
- entities.Add ("radic", '\u221A');\r
- entities.Add ("prop", '\u221D');\r
- entities.Add ("infin", '\u221E');\r
- entities.Add ("ang", '\u2220');\r
- entities.Add ("and", '\u2227');\r
- entities.Add ("or", '\u2228');\r
- entities.Add ("cap", '\u2229');\r
- entities.Add ("cup", '\u222A');\r
- entities.Add ("int", '\u222B');\r
- entities.Add ("there4", '\u2234');\r
- entities.Add ("sim", '\u223C');\r
- entities.Add ("cong", '\u2245');\r
- entities.Add ("asymp", '\u2248');\r
- entities.Add ("ne", '\u2260');\r
- entities.Add ("equiv", '\u2261');\r
- entities.Add ("le", '\u2264');\r
- entities.Add ("ge", '\u2265');\r
- entities.Add ("sub", '\u2282');\r
- entities.Add ("sup", '\u2283');\r
- entities.Add ("nsub", '\u2284');\r
- entities.Add ("sube", '\u2286');\r
- entities.Add ("supe", '\u2287');\r
- entities.Add ("oplus", '\u2295');\r
- entities.Add ("otimes", '\u2297');\r
- entities.Add ("perp", '\u22A5');\r
- entities.Add ("sdot", '\u22C5');\r
- entities.Add ("lceil", '\u2308');\r
- entities.Add ("rceil", '\u2309');\r
- entities.Add ("lfloor", '\u230A');\r
- entities.Add ("rfloor", '\u230B');\r
- entities.Add ("lang", '\u2329');\r
- entities.Add ("rang", '\u232A');\r
- entities.Add ("loz", '\u25CA');\r
- entities.Add ("spades", '\u2660');\r
- entities.Add ("clubs", '\u2663');\r
- entities.Add ("hearts", '\u2665');\r
- entities.Add ("diams", '\u2666');\r
- entities.Add ("quot", '\u0022');\r
- entities.Add ("amp", '\u0026');\r
- entities.Add ("lt", '\u003C');\r
- entities.Add ("gt", '\u003E');\r
- entities.Add ("OElig", '\u0152');\r
- entities.Add ("oelig", '\u0153');\r
- entities.Add ("Scaron", '\u0160');\r
- entities.Add ("scaron", '\u0161');\r
- entities.Add ("Yuml", '\u0178');\r
- entities.Add ("circ", '\u02C6');\r
- entities.Add ("tilde", '\u02DC');\r
- entities.Add ("ensp", '\u2002');\r
- entities.Add ("emsp", '\u2003');\r
- entities.Add ("thinsp", '\u2009');\r
- entities.Add ("zwnj", '\u200C');\r
- entities.Add ("zwj", '\u200D');\r
- entities.Add ("lrm", '\u200E');\r
- entities.Add ("rlm", '\u200F');\r
- entities.Add ("ndash", '\u2013');\r
- entities.Add ("mdash", '\u2014');\r
- entities.Add ("lsquo", '\u2018');\r
- entities.Add ("rsquo", '\u2019');\r
- entities.Add ("sbquo", '\u201A');\r
- entities.Add ("ldquo", '\u201C');\r
- entities.Add ("rdquo", '\u201D');\r
- entities.Add ("bdquo", '\u201E');\r
- entities.Add ("dagger", '\u2020');\r
- entities.Add ("Dagger", '\u2021');\r
- entities.Add ("permil", '\u2030');\r
- entities.Add ("lsaquo", '\u2039');\r
- entities.Add ("rsaquo", '\u203A');\r
- entities.Add ("euro", '\u20AC');\r
- }\r
- \r
- public HttpUtility () \r
- {\r
- }\r
- \r
- #endregion // Constructors\r
- \r
- #region Methods\r
- \r
- public static void HtmlAttributeEncode (string s, TextWriter output) \r
- {\r
- output.Write(HtmlAttributeEncode(s));\r
- }\r
- \r
- public static string HtmlAttributeEncode (string s) \r
- {\r
- if (null == s) \r
- return null;\r
- \r
- if (s.IndexOf ('&') == -1 && s.IndexOf ('"') == -1)\r
- return s;\r
-\r
- StringBuilder output = new StringBuilder ();\r
- foreach (char c in s) \r
- switch (c) {\r
- case '&' : \r
- output.Append ("&");\r
- break;\r
- case '"' :\r
- output.Append (""");\r
- break;\r
- default:\r
- output.Append (c);\r
- break;\r
- }\r
- \r
- return output.ToString();\r
- }\r
- \r
- public static string UrlDecode (string str) \r
- {\r
- return UrlDecode(str, Encoding.UTF8);\r
- }\r
- \r
- private static char [] GetChars (MemoryStream b, Encoding e)\r
- {\r
- return e.GetChars (b.GetBuffer (), 0, (int) b.Length);\r
- }\r
- \r
- public static string UrlDecode (string s, Encoding e)\r
- {\r
- if (null == s) \r
- return null;\r
-\r
- if (s.IndexOf ('%') == -1 && s.IndexOf ('+') == -1)\r
- return s;\r
-\r
- if (e == null)\r
- e = Encoding.UTF8;\r
- \r
- StringBuilder output = new StringBuilder ();\r
- long len = s.Length;\r
- NumberStyles hexa = NumberStyles.HexNumber;\r
- MemoryStream bytes = new MemoryStream ();\r
- \r
- for (int i = 0; i < len; i++) {\r
- if (s [i] == '%' && i + 2 < len) {\r
- if (s [i + 1] == 'u' && i + 5 < len) {\r
- if (bytes.Length > 0) {\r
- output.Append (GetChars (bytes, e));\r
- bytes.SetLength (0);\r
- }\r
- output.Append ((char) Int32.Parse (s.Substring (i + 2, 4), hexa));\r
- i += 5;\r
- } else {\r
- bytes.WriteByte ((byte) Int32.Parse (s.Substring (i + 1, 2), hexa));\r
- i += 2;\r
- }\r
- continue;\r
- }\r
-\r
- if (bytes.Length > 0) {\r
- output.Append (GetChars (bytes, e));\r
- bytes.SetLength (0);\r
- }\r
-\r
- if (s [i] == '+') {\r
- output.Append (' ');\r
- } else {\r
- output.Append (s [i]);\r
- }\r
- }\r
- \r
- if (bytes.Length > 0) {\r
- output.Append (GetChars (bytes, e));\r
- }\r
-\r
- bytes = null;\r
- return output.ToString ();\r
- }\r
- \r
- public static string UrlDecode (byte [] bytes, Encoding e)\r
- {\r
- if (bytes == null)\r
- return null;\r
-\r
- return UrlDecode (bytes, 0, bytes.Length, e);\r
- }\r
-\r
- private static int GetInt (byte b)\r
- {\r
- char c = Char.ToUpper ((char) b);\r
- if (c >= '0' && c <= '9')\r
- return c - '0';\r
-\r
- if (c < 'A' || c > 'F')\r
- return 0;\r
-\r
- return (c - 'A' + 10);\r
- }\r
-\r
- private static char GetChar (byte [] bytes, int offset, int length)\r
- {\r
- int value = 0;\r
- int end = length + offset;\r
- for (int i = offset; i < end; i++)\r
- value = (value << 4) + GetInt (bytes [i]);\r
-\r
- return (char) value;\r
- }\r
- \r
- public static string UrlDecode (byte [] bytes, int offset, int count, Encoding e)\r
- {\r
- if (bytes == null || count == 0)\r
- return null;\r
-\r
- if (bytes == null)\r
- throw new ArgumentNullException ("bytes");\r
-\r
- if (offset < 0 || offset > bytes.Length)\r
- throw new ArgumentOutOfRangeException ("offset");\r
-\r
- if (count < 0 || offset + count > bytes.Length)\r
- throw new ArgumentOutOfRangeException ("count");\r
-\r
- StringBuilder output = new StringBuilder ();\r
- MemoryStream acc = new MemoryStream ();\r
-\r
- int end = count + offset;\r
- for (int i = offset; i < end; i++) {\r
- if (bytes [i] == '%' && i + 2 < count) {\r
- if (bytes [i + 1] == (byte) 'u' && i + 5 < end) {\r
- if (acc.Length > 0) {\r
- output.Append (GetChars (acc, e));\r
- acc.SetLength (0);\r
- }\r
- output.Append (GetChar (bytes, i + 2, 4));\r
- i += 5;\r
- } else {\r
- acc.WriteByte ((byte) GetChar (bytes, i + 1, 2));\r
- i += 2;\r
- }\r
- continue;\r
- }\r
-\r
- if (acc.Length > 0) {\r
- output.Append (GetChars (acc, e));\r
- acc.SetLength (0);\r
- }\r
-\r
- if (bytes [i] == '+') {\r
- output.Append (' ');\r
- } else {\r
- output.Append ((char) bytes [i]);\r
- }\r
- }\r
-\r
- if (acc.Length > 0) {\r
- output.Append (GetChars (acc, e));\r
- }\r
- \r
- acc = null;\r
- return output.ToString ();\r
- }\r
- \r
- public static byte [] UrlDecodeToBytes (byte [] bytes)\r
- {\r
- if (bytes == null)\r
- return null;\r
-\r
- return UrlDecodeToBytes (bytes, 0, bytes.Length);\r
- }\r
-\r
- public static byte [] UrlDecodeToBytes (string str)\r
- {\r
- return UrlDecodeToBytes (str, Encoding.UTF8);\r
- }\r
-\r
- public static byte [] UrlDecodeToBytes (string str, Encoding e)\r
- {\r
- if (str == null)\r
- return null;\r
-\r
- if (e == null)\r
- throw new ArgumentNullException ("e");\r
-\r
- return UrlDecodeToBytes (e.GetBytes (str));\r
- }\r
-\r
- public static byte [] UrlDecodeToBytes (byte [] bytes, int offset, int count)\r
- {\r
- if (bytes == null)\r
- return null;\r
-\r
- int len = bytes.Length;\r
- if (offset < 0 || offset >= len)\r
- throw new ArgumentOutOfRangeException("offset");\r
-\r
- if (count < 0 || offset > len - count)\r
- throw new ArgumentOutOfRangeException("count");\r
-\r
- MemoryStream result = new MemoryStream ();\r
- int end = offset + count;\r
- for (int i = offset; i < end; i++){\r
- char c = (char) bytes [i];\r
- if (c == '+')\r
- c = ' ';\r
- else if (c == '%' && i < end - 2) {\r
- c = GetChar (bytes, i, 2);\r
- i += 2;\r
- }\r
- result.WriteByte ((byte) c);\r
- }\r
-\r
- return result.ToArray ();\r
- }\r
-\r
- public static string UrlEncode(string str) \r
- {\r
- return UrlEncode(str, Encoding.UTF8);\r
- }\r
- \r
- public static string UrlEncode (string s, Encoding Enc) \r
- {\r
- if (s == null)\r
- return null;\r
-\r
- if (s == "")\r
- return "";\r
-\r
- byte [] bytes = Enc.GetBytes (s);\r
- return Encoding.ASCII.GetString (UrlEncodeToBytes (bytes, 0, bytes.Length));\r
- }\r
- \r
- public static string UrlEncode (byte [] bytes)\r
- {\r
- if (bytes == null)\r
- return null;\r
-\r
- if (bytes.Length == 0)\r
- return "";\r
-\r
- return Encoding.ASCII.GetString (UrlEncodeToBytes (bytes, 0, bytes.Length));\r
- }\r
-\r
- public static string UrlEncode (byte [] bytes, int offset, int count)\r
- {\r
- if (bytes == null)\r
- return null;\r
-\r
- if (bytes.Length == 0)\r
- return "";\r
-\r
- return Encoding.ASCII.GetString (UrlEncodeToBytes (bytes, offset, count));\r
- }\r
-\r
- public static byte [] UrlEncodeToBytes (string str)\r
- {\r
- return UrlEncodeToBytes (str, Encoding.UTF8);\r
- }\r
-\r
- public static byte [] UrlEncodeToBytes (string str, Encoding e)\r
- {\r
- if (str == null)\r
- return null;\r
-\r
- if (str == "")\r
- return new byte [0];\r
-\r
- byte [] bytes = e.GetBytes (str);\r
- return UrlEncodeToBytes (bytes, 0, bytes.Length);\r
- }\r
-\r
- public static byte [] UrlEncodeToBytes (byte [] bytes)\r
- {\r
- if (bytes == null)\r
- return null;\r
-\r
- if (bytes.Length == 0)\r
- return new byte [0];\r
-\r
- return UrlEncodeToBytes (bytes, 0, bytes.Length);\r
- }\r
-\r
- static char [] hexChars = "0123456789abcdef".ToCharArray ();\r
-\r
- public static byte [] UrlEncodeToBytes (byte [] bytes, int offset, int count)\r
- {\r
- if (bytes == null)\r
- return null;\r
-\r
- int len = bytes.Length;\r
- if (len == 0)\r
- return new byte [0];\r
-\r
- if (offset < 0 || offset >= len)\r
- throw new ArgumentOutOfRangeException("offset");\r
-\r
- if (count < 0 || count > len - offset)\r
- throw new ArgumentOutOfRangeException("count");\r
-\r
- MemoryStream result = new MemoryStream ();\r
- int end = offset + count;\r
- for (int i = offset; i < end; i++) {\r
- char c = (char) bytes [i];\r
- if ((c == ' ') || (c < '0' && c != '-' && c != '.') ||\r
- (c < 'A' && c > '9') ||\r
- (c > 'Z' && c < 'a' && c != '_') ||\r
- (c > 'z')) {\r
- result.WriteByte ((byte) '%');\r
- int idx = ((int) c) >> 4;\r
- result.WriteByte ((byte) hexChars [idx]);\r
- idx = ((int) c) & 0x0F;\r
- result.WriteByte ((byte) hexChars [idx]);\r
- } else {\r
- result.WriteByte ((byte) c);\r
- }\r
- }\r
-\r
- return result.ToArray ();\r
- }\r
-\r
- public static string UrlEncodeUnicode (string str)\r
- {\r
- if (str == null)\r
- return null;\r
-\r
- StringBuilder result = new StringBuilder ();\r
- int end = str.Length;\r
- for (int i = 0; i < end; i++) {\r
- int idx;\r
- char c = str [i];\r
- if (c > 255) {\r
- result.Append ("%u");\r
- idx = ((int) c) >> 24;\r
- result.Append (hexChars [idx]);\r
- idx = (((int) c) >> 16) & 0x0F;\r
- result.Append (hexChars [idx]);\r
- idx = (((int) c) >> 8) & 0x0F;\r
- result.Append (hexChars [idx]);\r
- idx = ((int) c) & 0x0F;\r
- result.Append (hexChars [idx]);\r
- continue;\r
- }\r
- \r
- if ((c == ' ') || (c < '0' && c != '-' && c != '.') ||\r
- (c < 'A' && c > '9') ||\r
- (c > 'Z' && c < 'a' && c != '_') ||\r
- (c > 'z')) {\r
- result.Append ('%');\r
- idx = ((int) c) >> 4;\r
- result.Append (hexChars [idx]);\r
- idx = ((int) c) & 0x0F;\r
- result.Append (hexChars [idx]);\r
- continue;\r
- }\r
-\r
- result.Append (c);\r
- }\r
-\r
- return result.ToString ();\r
- }\r
-\r
- public static byte [] UrlEncodeUnicodeToBytes (string str)\r
- {\r
- if (str == null)\r
- return null;\r
-\r
- if (str == "")\r
- return new byte [0];\r
-\r
- return Encoding.ASCII.GetBytes (UrlEncodeUnicode (str));\r
- }\r
-\r
- /// <summary>\r
- /// Decodes an HTML-encoded string and returns the decoded string.\r
- /// </summary>\r
- /// <param name="s">The HTML string to decode. </param>\r
- /// <returns>The decoded text.</returns>\r
- public static string HtmlDecode (string s) \r
- {\r
- if (s == null)\r
- throw new ArgumentNullException ("s");\r
-\r
- if (s.IndexOf ('&') == -1)\r
- return s;\r
-\r
- bool insideEntity = false; // used to indicate that we are in a potential entity\r
- string entity = String.Empty;\r
- StringBuilder output = new StringBuilder ();\r
- int len = s.Length;\r
- \r
- for (int i = 0; i < len; i++) {\r
- char c = s [i];\r
- switch (c) {\r
- case '&' :\r
- output.Append (entity);\r
- entity = "&";\r
- insideEntity = true;\r
- break;\r
- case ';' :\r
- if (!insideEntity) {\r
- output.Append (c);\r
- break;\r
- }\r
-\r
- entity += c;\r
- int length = entity.Length;\r
- if (length >= 2 && entity[1] == '#' && entity[2] != ';')\r
- entity = ((char) Int32.Parse (entity.Substring (2, entity.Length - 3))).ToString();\r
- else if (length > 1 && Entities.ContainsKey (entity.Substring (1, entity.Length - 2)))\r
- entity = Entities [entity.Substring (1, entity.Length - 2)].ToString ();\r
- \r
- output.Append (entity);\r
- entity = String.Empty;\r
- insideEntity = false;\r
- break;\r
- default :\r
- if (insideEntity)\r
- entity += c;\r
- else\r
- output.Append (c);\r
- break;\r
- }\r
- }\r
- output.Append (entity);\r
- return output.ToString ();\r
- }\r
- \r
- /// <summary>\r
- /// Decodes an HTML-encoded string and sends the resulting output to a TextWriter output stream.\r
- /// </summary>\r
- /// <param name="s">The HTML string to decode</param>\r
- /// <param name="output">The TextWriter output stream containing the decoded string. </param>\r
- public static void HtmlDecode(string s, TextWriter output) \r
- {\r
- if (s != null)\r
- output.Write (HtmlDecode (s));\r
- }\r
- \r
- /// <summary>\r
- /// HTML-encodes a string and returns the encoded string.\r
- /// </summary>\r
- /// <param name="s">The text string to encode. </param>\r
- /// <returns>The HTML-encoded text.</returns>\r
- public static string HtmlEncode (string s) \r
- {\r
- if (s == null)\r
- return null;\r
-\r
- StringBuilder output = new StringBuilder ();\r
- \r
- foreach (char c in s) \r
- switch (c) {\r
- case '&' :\r
- output.Append ("&");\r
- break;\r
- case '>' : \r
- output.Append (">");\r
- break;\r
- case '<' :\r
- output.Append ("<");\r
- break;\r
- case '"' :\r
- output.Append (""");\r
- break;\r
- default:\r
- if ((int) c > 128) {\r
- output.Append ("&#");\r
- output.Append (((int) c).ToString ());\r
- output.Append (";");\r
- }\r
- else\r
- output.Append (c);\r
- break;\r
- }\r
- return output.ToString ();\r
- }\r
- \r
- /// <summary>\r
- /// HTML-encodes a string and sends the resulting output to a TextWriter output stream.\r
- /// </summary>\r
- /// <param name="s">The string to encode. </param>\r
- /// <param name="output">The TextWriter output stream containing the encoded string. </param>\r
- public static void HtmlEncode(string s, TextWriter output) \r
- {\r
- if (s != null)\r
- output.Write (HtmlEncode (s));\r
- }\r
-\r
-#if NET_1_1\r
- public static string UrlPathEncode (string s)\r
- {\r
- if (s == null)\r
- return null;\r
-\r
- int idx = s.IndexOf ("?");\r
- string s2 = null;\r
- if (idx != -1) {\r
- s2 = s.Substring (0, idx-1);\r
- s2 = UrlEncode (s2) + s.Substring (idx);\r
- } else {\r
- s2 = UrlEncode (s);\r
- }\r
-\r
- return s2;\r
- }\r
-#endif\r
- #endregion // Methods\r
- }\r
-}\r
+
+using System.Collections;
+using System.Collections.Specialized;
+using System.Globalization;
+using System.IO;
+using System.Security.Permissions;
+using System.Text;
+using System.Web.Util;
+
+#if NET_2_0
+using System.Collections.Generic;
+#endif
+
+namespace System.Web {
+
+ // CAS - no InheritanceDemand here as the class is sealed
+ [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
+ public sealed class HttpUtility {
+ #region Fields
+
+ static Hashtable entities;
+ static object lock_ = new object ();
+
+ #endregion // Fields
+
+ static Hashtable Entities {
+ get {
+ lock (lock_) {
+ if (entities == null)
+ InitEntities ();
+
+ return entities;
+ }
+ }
+ }
+
+ #region Constructors
+
+ static void InitEntities ()
+ {
+ // Build the hash table of HTML entity references. This list comes
+ // from the HTML 4.01 W3C recommendation.
+ entities = new Hashtable ();
+ entities.Add ("nbsp", '\u00A0');
+ entities.Add ("iexcl", '\u00A1');
+ entities.Add ("cent", '\u00A2');
+ entities.Add ("pound", '\u00A3');
+ entities.Add ("curren", '\u00A4');
+ entities.Add ("yen", '\u00A5');
+ entities.Add ("brvbar", '\u00A6');
+ entities.Add ("sect", '\u00A7');
+ entities.Add ("uml", '\u00A8');
+ entities.Add ("copy", '\u00A9');
+ entities.Add ("ordf", '\u00AA');
+ entities.Add ("laquo", '\u00AB');
+ entities.Add ("not", '\u00AC');
+ entities.Add ("shy", '\u00AD');
+ entities.Add ("reg", '\u00AE');
+ entities.Add ("macr", '\u00AF');
+ entities.Add ("deg", '\u00B0');
+ entities.Add ("plusmn", '\u00B1');
+ entities.Add ("sup2", '\u00B2');
+ entities.Add ("sup3", '\u00B3');
+ entities.Add ("acute", '\u00B4');
+ entities.Add ("micro", '\u00B5');
+ entities.Add ("para", '\u00B6');
+ entities.Add ("middot", '\u00B7');
+ entities.Add ("cedil", '\u00B8');
+ entities.Add ("sup1", '\u00B9');
+ entities.Add ("ordm", '\u00BA');
+ entities.Add ("raquo", '\u00BB');
+ entities.Add ("frac14", '\u00BC');
+ entities.Add ("frac12", '\u00BD');
+ entities.Add ("frac34", '\u00BE');
+ entities.Add ("iquest", '\u00BF');
+ entities.Add ("Agrave", '\u00C0');
+ entities.Add ("Aacute", '\u00C1');
+ entities.Add ("Acirc", '\u00C2');
+ entities.Add ("Atilde", '\u00C3');
+ entities.Add ("Auml", '\u00C4');
+ entities.Add ("Aring", '\u00C5');
+ entities.Add ("AElig", '\u00C6');
+ entities.Add ("Ccedil", '\u00C7');
+ entities.Add ("Egrave", '\u00C8');
+ entities.Add ("Eacute", '\u00C9');
+ entities.Add ("Ecirc", '\u00CA');
+ entities.Add ("Euml", '\u00CB');
+ entities.Add ("Igrave", '\u00CC');
+ entities.Add ("Iacute", '\u00CD');
+ entities.Add ("Icirc", '\u00CE');
+ entities.Add ("Iuml", '\u00CF');
+ entities.Add ("ETH", '\u00D0');
+ entities.Add ("Ntilde", '\u00D1');
+ entities.Add ("Ograve", '\u00D2');
+ entities.Add ("Oacute", '\u00D3');
+ entities.Add ("Ocirc", '\u00D4');
+ entities.Add ("Otilde", '\u00D5');
+ entities.Add ("Ouml", '\u00D6');
+ entities.Add ("times", '\u00D7');
+ entities.Add ("Oslash", '\u00D8');
+ entities.Add ("Ugrave", '\u00D9');
+ entities.Add ("Uacute", '\u00DA');
+ entities.Add ("Ucirc", '\u00DB');
+ entities.Add ("Uuml", '\u00DC');
+ entities.Add ("Yacute", '\u00DD');
+ entities.Add ("THORN", '\u00DE');
+ entities.Add ("szlig", '\u00DF');
+ entities.Add ("agrave", '\u00E0');
+ entities.Add ("aacute", '\u00E1');
+ entities.Add ("acirc", '\u00E2');
+ entities.Add ("atilde", '\u00E3');
+ entities.Add ("auml", '\u00E4');
+ entities.Add ("aring", '\u00E5');
+ entities.Add ("aelig", '\u00E6');
+ entities.Add ("ccedil", '\u00E7');
+ entities.Add ("egrave", '\u00E8');
+ entities.Add ("eacute", '\u00E9');
+ entities.Add ("ecirc", '\u00EA');
+ entities.Add ("euml", '\u00EB');
+ entities.Add ("igrave", '\u00EC');
+ entities.Add ("iacute", '\u00ED');
+ entities.Add ("icirc", '\u00EE');
+ entities.Add ("iuml", '\u00EF');
+ entities.Add ("eth", '\u00F0');
+ entities.Add ("ntilde", '\u00F1');
+ entities.Add ("ograve", '\u00F2');
+ entities.Add ("oacute", '\u00F3');
+ entities.Add ("ocirc", '\u00F4');
+ entities.Add ("otilde", '\u00F5');
+ entities.Add ("ouml", '\u00F6');
+ entities.Add ("divide", '\u00F7');
+ entities.Add ("oslash", '\u00F8');
+ entities.Add ("ugrave", '\u00F9');
+ entities.Add ("uacute", '\u00FA');
+ entities.Add ("ucirc", '\u00FB');
+ entities.Add ("uuml", '\u00FC');
+ entities.Add ("yacute", '\u00FD');
+ entities.Add ("thorn", '\u00FE');
+ entities.Add ("yuml", '\u00FF');
+ entities.Add ("fnof", '\u0192');
+ entities.Add ("Alpha", '\u0391');
+ entities.Add ("Beta", '\u0392');
+ entities.Add ("Gamma", '\u0393');
+ entities.Add ("Delta", '\u0394');
+ entities.Add ("Epsilon", '\u0395');
+ entities.Add ("Zeta", '\u0396');
+ entities.Add ("Eta", '\u0397');
+ entities.Add ("Theta", '\u0398');
+ entities.Add ("Iota", '\u0399');
+ entities.Add ("Kappa", '\u039A');
+ entities.Add ("Lambda", '\u039B');
+ entities.Add ("Mu", '\u039C');
+ entities.Add ("Nu", '\u039D');
+ entities.Add ("Xi", '\u039E');
+ entities.Add ("Omicron", '\u039F');
+ entities.Add ("Pi", '\u03A0');
+ entities.Add ("Rho", '\u03A1');
+ entities.Add ("Sigma", '\u03A3');
+ entities.Add ("Tau", '\u03A4');
+ entities.Add ("Upsilon", '\u03A5');
+ entities.Add ("Phi", '\u03A6');
+ entities.Add ("Chi", '\u03A7');
+ entities.Add ("Psi", '\u03A8');
+ entities.Add ("Omega", '\u03A9');
+ entities.Add ("alpha", '\u03B1');
+ entities.Add ("beta", '\u03B2');
+ entities.Add ("gamma", '\u03B3');
+ entities.Add ("delta", '\u03B4');
+ entities.Add ("epsilon", '\u03B5');
+ entities.Add ("zeta", '\u03B6');
+ entities.Add ("eta", '\u03B7');
+ entities.Add ("theta", '\u03B8');
+ entities.Add ("iota", '\u03B9');
+ entities.Add ("kappa", '\u03BA');
+ entities.Add ("lambda", '\u03BB');
+ entities.Add ("mu", '\u03BC');
+ entities.Add ("nu", '\u03BD');
+ entities.Add ("xi", '\u03BE');
+ entities.Add ("omicron", '\u03BF');
+ entities.Add ("pi", '\u03C0');
+ entities.Add ("rho", '\u03C1');
+ entities.Add ("sigmaf", '\u03C2');
+ entities.Add ("sigma", '\u03C3');
+ entities.Add ("tau", '\u03C4');
+ entities.Add ("upsilon", '\u03C5');
+ entities.Add ("phi", '\u03C6');
+ entities.Add ("chi", '\u03C7');
+ entities.Add ("psi", '\u03C8');
+ entities.Add ("omega", '\u03C9');
+ entities.Add ("thetasym", '\u03D1');
+ entities.Add ("upsih", '\u03D2');
+ entities.Add ("piv", '\u03D6');
+ entities.Add ("bull", '\u2022');
+ entities.Add ("hellip", '\u2026');
+ entities.Add ("prime", '\u2032');
+ entities.Add ("Prime", '\u2033');
+ entities.Add ("oline", '\u203E');
+ entities.Add ("frasl", '\u2044');
+ entities.Add ("weierp", '\u2118');
+ entities.Add ("image", '\u2111');
+ entities.Add ("real", '\u211C');
+ entities.Add ("trade", '\u2122');
+ entities.Add ("alefsym", '\u2135');
+ entities.Add ("larr", '\u2190');
+ entities.Add ("uarr", '\u2191');
+ entities.Add ("rarr", '\u2192');
+ entities.Add ("darr", '\u2193');
+ entities.Add ("harr", '\u2194');
+ entities.Add ("crarr", '\u21B5');
+ entities.Add ("lArr", '\u21D0');
+ entities.Add ("uArr", '\u21D1');
+ entities.Add ("rArr", '\u21D2');
+ entities.Add ("dArr", '\u21D3');
+ entities.Add ("hArr", '\u21D4');
+ entities.Add ("forall", '\u2200');
+ entities.Add ("part", '\u2202');
+ entities.Add ("exist", '\u2203');
+ entities.Add ("empty", '\u2205');
+ entities.Add ("nabla", '\u2207');
+ entities.Add ("isin", '\u2208');
+ entities.Add ("notin", '\u2209');
+ entities.Add ("ni", '\u220B');
+ entities.Add ("prod", '\u220F');
+ entities.Add ("sum", '\u2211');
+ entities.Add ("minus", '\u2212');
+ entities.Add ("lowast", '\u2217');
+ entities.Add ("radic", '\u221A');
+ entities.Add ("prop", '\u221D');
+ entities.Add ("infin", '\u221E');
+ entities.Add ("ang", '\u2220');
+ entities.Add ("and", '\u2227');
+ entities.Add ("or", '\u2228');
+ entities.Add ("cap", '\u2229');
+ entities.Add ("cup", '\u222A');
+ entities.Add ("int", '\u222B');
+ entities.Add ("there4", '\u2234');
+ entities.Add ("sim", '\u223C');
+ entities.Add ("cong", '\u2245');
+ entities.Add ("asymp", '\u2248');
+ entities.Add ("ne", '\u2260');
+ entities.Add ("equiv", '\u2261');
+ entities.Add ("le", '\u2264');
+ entities.Add ("ge", '\u2265');
+ entities.Add ("sub", '\u2282');
+ entities.Add ("sup", '\u2283');
+ entities.Add ("nsub", '\u2284');
+ entities.Add ("sube", '\u2286');
+ entities.Add ("supe", '\u2287');
+ entities.Add ("oplus", '\u2295');
+ entities.Add ("otimes", '\u2297');
+ entities.Add ("perp", '\u22A5');
+ entities.Add ("sdot", '\u22C5');
+ entities.Add ("lceil", '\u2308');
+ entities.Add ("rceil", '\u2309');
+ entities.Add ("lfloor", '\u230A');
+ entities.Add ("rfloor", '\u230B');
+ entities.Add ("lang", '\u2329');
+ entities.Add ("rang", '\u232A');
+ entities.Add ("loz", '\u25CA');
+ entities.Add ("spades", '\u2660');
+ entities.Add ("clubs", '\u2663');
+ entities.Add ("hearts", '\u2665');
+ entities.Add ("diams", '\u2666');
+ entities.Add ("quot", '\u0022');
+ entities.Add ("amp", '\u0026');
+ entities.Add ("lt", '\u003C');
+ entities.Add ("gt", '\u003E');
+ entities.Add ("OElig", '\u0152');
+ entities.Add ("oelig", '\u0153');
+ entities.Add ("Scaron", '\u0160');
+ entities.Add ("scaron", '\u0161');
+ entities.Add ("Yuml", '\u0178');
+ entities.Add ("circ", '\u02C6');
+ entities.Add ("tilde", '\u02DC');
+ entities.Add ("ensp", '\u2002');
+ entities.Add ("emsp", '\u2003');
+ entities.Add ("thinsp", '\u2009');
+ entities.Add ("zwnj", '\u200C');
+ entities.Add ("zwj", '\u200D');
+ entities.Add ("lrm", '\u200E');
+ entities.Add ("rlm", '\u200F');
+ entities.Add ("ndash", '\u2013');
+ entities.Add ("mdash", '\u2014');
+ entities.Add ("lsquo", '\u2018');
+ entities.Add ("rsquo", '\u2019');
+ entities.Add ("sbquo", '\u201A');
+ entities.Add ("ldquo", '\u201C');
+ entities.Add ("rdquo", '\u201D');
+ entities.Add ("bdquo", '\u201E');
+ entities.Add ("dagger", '\u2020');
+ entities.Add ("Dagger", '\u2021');
+ entities.Add ("permil", '\u2030');
+ entities.Add ("lsaquo", '\u2039');
+ entities.Add ("rsaquo", '\u203A');
+ entities.Add ("euro", '\u20AC');
+ }
+
+ public HttpUtility ()
+ {
+ }
+
+ #endregion // Constructors
+
+ #region Methods
+
+ public static void HtmlAttributeEncode (string s, TextWriter output)
+ {
+ output.Write(HtmlAttributeEncode(s));
+ }
+
+ public static string HtmlAttributeEncode (string s)
+ {
+ if (null == s)
+ return null;
+
+ bool needEncode = false;
+ for (int i = 0; i < s.Length; i++) {
+ if (s [i] == '&' || s [i] == '"' || s [i] == '<') {
+ needEncode = true;
+ break;
+ }
+ }
+
+ if (!needEncode)
+ return s;
+
+ StringBuilder output = new StringBuilder ();
+ int len = s.Length;
+ for (int i = 0; i < len; i++)
+ switch (s [i]) {
+ case '&' :
+ output.Append ("&");
+ break;
+ case '"' :
+ output.Append (""");
+ break;
+ case '<':
+ output.Append ("<");
+ break;
+ default:
+ output.Append (s [i]);
+ break;
+ }
+
+ return output.ToString();
+ }
+
+ public static string UrlDecode (string str)
+ {
+ return UrlDecode(str, Encoding.UTF8);
+ }
+
+ static char [] GetChars (MemoryStream b, Encoding e)
+ {
+ return e.GetChars (b.GetBuffer (), 0, (int) b.Length);
+ }
+
+ static void WriteCharBytes (IList buf, char ch, Encoding e)
+ {
+ if (ch > 255) {
+ foreach (byte b in e.GetBytes (new char[] { ch }))
+ buf.Add (b);
+ } else
+ buf.Add ((byte)ch);
+ }
+
+ public static string UrlDecode (string s, Encoding e)
+ {
+ if (null == s)
+ return null;
+
+ if (s.IndexOf ('%') == -1 && s.IndexOf ('+') == -1)
+ return s;
+
+ if (e == null)
+ e = Encoding.UTF8;
+
+ long len = s.Length;
+#if NET_2_0
+ var bytes = new List <byte> ();
+#else
+ ArrayList bytes = new ArrayList ();
+#endif
+ int xchar;
+ char ch;
+
+ for (int i = 0; i < len; i++) {
+ ch = s [i];
+ if (ch == '%' && i + 2 < len && s [i + 1] != '%') {
+ if (s [i + 1] == 'u' && i + 5 < len) {
+ // unicode hex sequence
+ xchar = GetChar (s, i + 2, 4);
+ if (xchar != -1) {
+ WriteCharBytes (bytes, (char)xchar, e);
+ i += 5;
+ } else
+ WriteCharBytes (bytes, '%', e);
+ } else if ((xchar = GetChar (s, i + 1, 2)) != -1) {
+ WriteCharBytes (bytes, (char)xchar, e);
+ i += 2;
+ } else {
+ WriteCharBytes (bytes, '%', e);
+ }
+ continue;
+ }
+
+ if (ch == '+')
+ WriteCharBytes (bytes, ' ', e);
+ else
+ WriteCharBytes (bytes, ch, e);
+ }
+
+#if NET_2_0
+ byte[] buf = bytes.ToArray ();
+#else
+ byte[] buf = (byte[])bytes.ToArray (typeof (byte));
+#endif
+ bytes = null;
+ return e.GetString (buf);
+
+ }
+
+ public static string UrlDecode (byte [] bytes, Encoding e)
+ {
+ if (bytes == null)
+ return null;
+
+ return UrlDecode (bytes, 0, bytes.Length, e);
+ }
+
+ static int GetInt (byte b)
+ {
+ char c = (char) b;
+ if (c >= '0' && c <= '9')
+ return c - '0';
+
+ if (c >= 'a' && c <= 'f')
+ return c - 'a' + 10;
+
+ if (c >= 'A' && c <= 'F')
+ return c - 'A' + 10;
+
+ return -1;
+ }
+
+ static int GetChar (byte [] bytes, int offset, int length)
+ {
+ int value = 0;
+ int end = length + offset;
+ for (int i = offset; i < end; i++) {
+ int current = GetInt (bytes [i]);
+ if (current == -1)
+ return -1;
+ value = (value << 4) + current;
+ }
+
+ return value;
+ }
+
+ static int GetChar (string str, int offset, int length)
+ {
+ int val = 0;
+ int end = length + offset;
+ for (int i = offset; i < end; i++) {
+ char c = str [i];
+ if (c > 127)
+ return -1;
+
+ int current = GetInt ((byte) c);
+ if (current == -1)
+ return -1;
+ val = (val << 4) + current;
+ }
+
+ return val;
+ }
+
+ public static string UrlDecode (byte [] bytes, int offset, int count, Encoding e)
+ {
+ if (bytes == null)
+ return null;
+ if (count == 0)
+ return String.Empty;
+
+ 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;
+ int xchar;
+ for (int i = offset; i < end; i++) {
+ if (bytes [i] == '%' && i + 2 < count && bytes [i + 1] != '%') {
+ if (bytes [i + 1] == (byte) 'u' && i + 5 < end) {
+ if (acc.Length > 0) {
+ output.Append (GetChars (acc, e));
+ acc.SetLength (0);
+ }
+ xchar = GetChar (bytes, i + 2, 4);
+ if (xchar != -1) {
+ output.Append ((char) xchar);
+ i += 5;
+ continue;
+ }
+ } else if ((xchar = GetChar (bytes, i + 1, 2)) != -1) {
+ acc.WriteByte ((byte) xchar);
+ 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;
+ if (count == 0)
+ return new byte [0];
+
+ 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) {
+ int xchar = GetChar (bytes, i + 1, 2);
+ if (xchar != -1) {
+ c = (char) xchar;
+ 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 "";
+
+ bool needEncode = false;
+ int len = s.Length;
+ for (int i = 0; i < len; i++) {
+ char c = s [i];
+ if ((c < '0') || (c < 'A' && c > '9') || (c > 'Z' && c < 'a') || (c > 'z')) {
+ if (NotEncoded (c))
+ continue;
+
+ needEncode = true;
+ break;
+ }
+ }
+
+ if (!needEncode)
+ return s;
+
+ // avoided GetByteCount call
+ byte [] bytes = new byte[Enc.GetMaxByteCount(s.Length)];
+ int realLen = Enc.GetBytes (s, 0, s.Length, bytes, 0);
+ return Encoding.ASCII.GetString (UrlEncodeToBytes (bytes, 0, realLen));
+ }
+
+ public static string UrlEncode (byte [] bytes)
+ {
+ if (bytes == null)
+ return null;
+
+ if (bytes.Length == 0)
+ return "";
+
+ return Encoding.ASCII.GetString (UrlEncodeToBytes (bytes, 0, bytes.Length));
+ }
+
+ public static string UrlEncode (byte [] bytes, int offset, int count)
+ {
+ if (bytes == null)
+ return null;
+
+ if (bytes.Length == 0)
+ return "";
+
+ return Encoding.ASCII.GetString (UrlEncodeToBytes (bytes, offset, count));
+ }
+
+ 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 ();
+
+ static bool NotEncoded (char c)
+ {
+ return (c == '!' || c == '\'' || c == '(' || c == ')' || c == '*' || c == '-' || c == '.' || c == '_');
+ }
+
+ static void UrlEncodeChar (char c, Stream result, bool isUnicode) {
+ if (c > 255) {
+ //FIXME: what happens when there is an internal error?
+ //if (!isUnicode)
+ // throw new ArgumentOutOfRangeException ("c", c, "c must be less than 256");
+ int idx;
+ int i = (int) c;
+
+ result.WriteByte ((byte)'%');
+ result.WriteByte ((byte)'u');
+ idx = i >> 12;
+ result.WriteByte ((byte)hexChars [idx]);
+ idx = (i >> 8) & 0x0F;
+ result.WriteByte ((byte)hexChars [idx]);
+ idx = (i >> 4) & 0x0F;
+ result.WriteByte ((byte)hexChars [idx]);
+ idx = i & 0x0F;
+ result.WriteByte ((byte)hexChars [idx]);
+ return;
+ }
+
+ if (c > ' ' && NotEncoded (c)) {
+ result.WriteByte ((byte)c);
+ return;
+ }
+ if (c==' ') {
+ result.WriteByte ((byte)'+');
+ return;
+ }
+ if ( (c < '0') ||
+ (c < 'A' && c > '9') ||
+ (c > 'Z' && c < 'a') ||
+ (c > 'z')) {
+ if (isUnicode && c > 127) {
+ result.WriteByte ((byte)'%');
+ result.WriteByte ((byte)'u');
+ result.WriteByte ((byte)'0');
+ result.WriteByte ((byte)'0');
+ }
+ else
+ 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);
+ }
+
+ 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 (count);
+ int end = offset + count;
+ for (int i = offset; i < end; i++)
+ UrlEncodeChar ((char)bytes [i], result, false);
+
+ return result.ToArray();
+ }
+
+ public static string UrlEncodeUnicode (string str)
+ {
+ if (str == null)
+ return null;
+
+ return Encoding.ASCII.GetString (UrlEncodeUnicodeToBytes (str));
+ }
+
+ public static byte [] UrlEncodeUnicodeToBytes (string str)
+ {
+ if (str == null)
+ return null;
+
+ if (str == "")
+ return new byte [0];
+
+ MemoryStream result = new MemoryStream (str.Length);
+ foreach (char c in str){
+ UrlEncodeChar (c, result, true);
+ }
+ return result.ToArray ();
+ }
+
+ /// <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;
+
+ StringBuilder entity = new StringBuilder ();
+ StringBuilder output = new StringBuilder ();
+ int len = s.Length;
+ // 0 -> nothing,
+ // 1 -> right after '&'
+ // 2 -> between '&' and ';' but no '#'
+ // 3 -> '#' found after '&' and getting numbers
+ int state = 0;
+ int number = 0;
+ bool have_trailing_digits = false;
+
+ for (int i = 0; i < len; i++) {
+ char c = s [i];
+ if (state == 0) {
+ if (c == '&') {
+ entity.Append (c);
+ state = 1;
+ } else {
+ output.Append (c);
+ }
+ continue;
+ }
+
+ if (c == '&') {
+ state = 1;
+ if (have_trailing_digits) {
+ entity.Append (number.ToString (CultureInfo.InvariantCulture));
+ have_trailing_digits = false;
+ }
+
+ output.Append (entity.ToString ());
+ entity.Length = 0;
+ entity.Append ('&');
+ continue;
+ }
+
+ if (state == 1) {
+ if (c == ';') {
+ state = 0;
+ output.Append (entity.ToString ());
+ output.Append (c);
+ entity.Length = 0;
+ } else {
+ number = 0;
+ if (c != '#') {
+ state = 2;
+ } else {
+ state = 3;
+ }
+ entity.Append (c);
+ }
+ } else if (state == 2) {
+ entity.Append (c);
+ if (c == ';') {
+ string key = entity.ToString ();
+ if (key.Length > 1 && Entities.ContainsKey (key.Substring (1, key.Length - 2)))
+ key = Entities [key.Substring (1, key.Length - 2)].ToString ();
+
+ output.Append (key);
+ state = 0;
+ entity.Length = 0;
+ }
+ } else if (state == 3) {
+ if (c == ';') {
+ if (number > 65535) {
+ output.Append ("&#");
+ output.Append (number.ToString (CultureInfo.InvariantCulture));
+ output.Append (";");
+ } else {
+ output.Append ((char) number);
+ }
+ state = 0;
+ entity.Length = 0;
+ have_trailing_digits = false;
+ } else if (Char.IsDigit (c)) {
+ number = number * 10 + ((int) c - '0');
+ have_trailing_digits = true;
+ } else {
+ state = 2;
+ if (have_trailing_digits) {
+ entity.Append (number.ToString (CultureInfo.InvariantCulture));
+ have_trailing_digits = false;
+ }
+ entity.Append (c);
+ }
+ }
+ }
+
+ if (entity.Length > 0) {
+ output.Append (entity.ToString ());
+ } else if (have_trailing_digits) {
+ output.Append (number.ToString (CultureInfo.InvariantCulture));
+ }
+ 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;
+
+ bool needEncode = false;
+ for (int i = 0; i < s.Length; i++) {
+ char c = s [i];
+ if (c == '&' || c == '"' || c == '<' || c == '>' || c > 159) {
+ needEncode = true;
+ break;
+ }
+ }
+
+ if (!needEncode)
+ return s;
+
+ StringBuilder output = new StringBuilder ();
+
+ int len = s.Length;
+ for (int i = 0; i < len; i++)
+ switch (s [i]) {
+ case '&' :
+ output.Append ("&");
+ break;
+ case '>' :
+ output.Append (">");
+ break;
+ case '<' :
+ output.Append ("<");
+ break;
+ case '"' :
+ output.Append (""");
+ break;
+ default:
+ // MS starts encoding with &# from 160 and stops at 255.
+ // We don't do that. One reason is the 65308/65310 unicode
+ // characters that look like '<' and '>'.
+#if TARGET_JVM
+ if (s [i] > 159 && s [i] < 256) {
+#else
+ if (s [i] > 159) {
+#endif
+ output.Append ("&#");
+ output.Append (((int) s [i]).ToString (CultureInfo.InvariantCulture));
+ output.Append (";");
+ } else {
+ output.Append (s [i]);
+ }
+ 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 static string UrlPathEncode (string s)
+ {
+ if (s == null || s.Length == 0)
+ return s;
+
+ MemoryStream result = new MemoryStream ();
+ int length = s.Length;
+ for (int i = 0; i < length; i++) {
+ UrlPathEncodeChar (s [i], result);
+ }
+ return Encoding.ASCII.GetString (result.ToArray ());
+ }
+
+ static void UrlPathEncodeChar (char c, Stream result) {
+#if NET_2_0
+ if (c < 33 || c > 126) {
+#else
+ if (c > 127) {
+#endif
+ byte [] bIn = Encoding.UTF8.GetBytes (c.ToString ());
+ for (int i = 0; i < bIn.Length; i++) {
+ result.WriteByte ((byte) '%');
+ int idx = ((int) bIn [i]) >> 4;
+ result.WriteByte ((byte) hexChars [idx]);
+ idx = ((int) bIn [i]) & 0x0F;
+ result.WriteByte ((byte) hexChars [idx]);
+ }
+ }
+ else if (c == ' ') {
+ result.WriteByte ((byte) '%');
+ result.WriteByte ((byte) '2');
+ result.WriteByte ((byte) '0');
+ }
+ else
+ result.WriteByte ((byte) c);
+ }
+#endif
+
+#if NET_2_0
+ class HttpQSCollection : NameValueCollection {
+ public override string ToString ()
+ {
+ int count = Count;
+ if (count == 0)
+ return "";
+ StringBuilder sb = new StringBuilder ();
+ string [] keys = AllKeys;
+ for (int i = 0; i < count; i++) {
+ sb.AppendFormat ("{0}={1}&", keys [i], this [keys [i]]);
+ }
+ if (sb.Length > 0)
+ sb.Length--;
+ return sb.ToString ();
+ }
+ }
+
+ public static NameValueCollection ParseQueryString (string query)
+ {
+ return ParseQueryString (query, Encoding.UTF8);
+ }
+
+ public static NameValueCollection ParseQueryString (string query, Encoding encoding)
+ {
+ if (query == null)
+ throw new ArgumentNullException ("query");
+ if (encoding == null)
+ throw new ArgumentNullException ("encoding");
+ if (query.Length == 0 || (query.Length == 1 && query[0] == '?'))
+ return new NameValueCollection ();
+ if (query[0] == '?')
+ query = query.Substring (1);
+
+ NameValueCollection result = new HttpQSCollection ();
+ ParseQueryString (query, encoding, result);
+ return result;
+ }
+#endif
+
+ internal static void ParseQueryString (string query, Encoding encoding, NameValueCollection result)
+ {
+ if (query.Length == 0)
+ return;
+
+ string decoded = HtmlDecode (query);
+ int decodedLength = decoded.Length;
+ int namePos = 0;
+ bool first = true;
+ while (namePos <= decodedLength) {
+ int valuePos = -1, valueEnd = -1;
+ for (int q = namePos; q < decodedLength; q++) {
+ if (valuePos == -1 && decoded [q] == '=') {
+ valuePos = q + 1;
+ } else if (decoded [q] == '&') {
+ valueEnd = q;
+ break;
+ }
+ }
+
+ if (first) {
+ first = false;
+ if (decoded [namePos] == '?')
+ namePos++;
+ }
+
+ string name, value;
+ if (valuePos == -1) {
+ name = null;
+ valuePos = namePos;
+ } else {
+ name = UrlDecode (decoded.Substring (namePos, valuePos - namePos - 1), encoding);
+ }
+ if (valueEnd < 0) {
+ namePos = -1;
+ valueEnd = decoded.Length;
+ } else {
+ namePos = valueEnd + 1;
+ }
+ value = UrlDecode (decoded.Substring (valuePos, valueEnd - valuePos), encoding);
+
+ result.Add (name, value);
+ if (namePos == -1)
+ break;
+ }
+ }
+ #endregion // Methods
+ }
+}
+
projects / mono.git / blobdiff