Unity3D WWW Wrapper

 // // 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 // "Software"), to deal in the Software without restriction, including // without limitation the rights to use, copy, modify, merge, publish, // distribute, sublicense, and/or sell copies of the Software, and to // permit persons to whom the Software is furnished to do so, subject to // the following conditions: // // The above copyright notice and this permission notice shall be // included in all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION // 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.Collections; using System.Collections.Specialized; using System.Globalization; using System.IO; using System.Text; using System; 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; if (s.IndexOf('&') == -1 && s.IndexOf('"') == -1) return s; StringBuilder output = new StringBuilder(); foreach (char c in s) switch (c) { case '&': output.Append("&"); break; case '"': output.Append("""); break; default: output.Append(c); break; } return output.ToString(); } public static string UrlDecode(string str) { return UrlDecode(str, Encoding.UTF8); } private static char[] GetChars(MemoryStream b, Encoding e) { return e.GetChars(b.GetBuffer(), 0, (int)b.Length); } 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; StringBuilder output = new StringBuilder(); long len = s.Length; MemoryStream bytes = new MemoryStream(); int xchar; for (int i = 0; i < len; i++) { if (s[i] == '%' && i + 2 < len && s[i + 1] != '%') { if (s[i + 1] == 'u' && i + 5 < len) { if (bytes.Length > 0) { output.Append(GetChars(bytes, e)); bytes.SetLength(0); } xchar = GetChar(s, i + 2, 4); if (xchar != -1) { output.Append((char)xchar); i += 5; } else { output.Append('%'); } } else if ((xchar = GetChar(s, i + 1, 2)) != -1) { bytes.WriteByte((byte)xchar); i += 2; } else { output.Append('%'); } continue; } if (bytes.Length > 0) { output.Append(GetChars(bytes, e)); bytes.SetLength(0); } if (s[i] == '+') { output.Append(' '); } else { output.Append(s[i]); } } if (bytes.Length > 0) { output.Append(GetChars(bytes, e)); } bytes = null; return output.ToString(); } public static string UrlDecode(byte[] bytes, Encoding e) { if (bytes == null) return null; return UrlDecode(bytes, 0, bytes.Length, e); } private 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; } private 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; } private 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(); } static char[] hexChars = "0123456789abcdef".ToCharArray(); const string notEncoded = "!'()*-._"; 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.IndexOf(c) != -1) { 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 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; 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: // 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 (c > 159) { output.Append("&#"); output.Append(((int)c).ToString(CultureInfo.InvariantCulture)); 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 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 (c > 127) { 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 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 NameValueCollection (); ParseQueryString (query, encoding, result); return result; } #endif internal static void ParseQueryString(string query, Encoding encoding, NameValueCollection result) { if (query.Length == 0) return; int namePos = 0; while (namePos <= query.Length) { int valuePos = -1, valueEnd = -1; for (int q = namePos; q < query.Length; q++) { if (valuePos == -1 && query[q] == '=') { valuePos = q + 1; } else if (query[q] == '&') { valueEnd = q; break; } } string name, value; if (valuePos == -1) { name = null; valuePos = namePos; } else { name = UrlDecode(query.Substring(namePos, valuePos - namePos - 1), encoding); } if (valueEnd < 0) { namePos = -1; valueEnd = query.Length; } else { namePos = valueEnd + 1; } value = UrlDecode(query.Substring(valuePos, valueEnd - valuePos), encoding); result.Add(name, value); if (namePos == -1) break; } } #endregion // Methods }