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/**
* Uri encode and decode (RFC1630, RFC1738, RFC2396)
* http://www.codeguru.com/cpp/cpp/algorithms/strings/article.php/c12759/URI-Encoding-and-Decoding.htm
*
* Copyright 2006 (C) by Jin Qing
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string>
#ifdef OLDCODE
const char HEX2DEC[256] =
{
/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
/* 0 */ -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
/* 1 */ -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
/* 2 */ -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
/* 3 */ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,-1,-1, -1,-1,-1,-1,
/* 4 */ -1,10,11,12, 13,14,15,-1, -1,-1,-1,-1, -1,-1,-1,-1,
/* 5 */ -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
/* 6 */ -1,10,11,12, 13,14,15,-1, -1,-1,-1,-1, -1,-1,-1,-1,
/* 7 */ -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
/* 8 */ -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
/* 9 */ -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
/* A */ -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
/* B */ -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
/* C */ -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
/* D */ -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
/* E */ -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
/* F */ -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1
};
#endif
const unsigned char HEX2DEC[256] =
{
/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
/* 0 */ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
/* 1 */ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
/* 2 */ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
/* 3 */ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 255, 255, 255, 255, 255, 255,
/* 4 */ 255, 10, 11, 12, 13, 14, 15, 255, 255, 255, 255, 255, 255, 255, 255, 255,
/* 5 */ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
/* 6 */ 255, 10, 11, 12, 13, 14, 15, 255, 255, 255, 255, 255, 255, 255, 255, 255,
/* 7 */ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
/* 8 */ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
/* 9 */ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
/* A */ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
/* B */ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
/* C */ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
/* D */ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
/* E */ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
/* F */ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255
};
std::string UriDecode(const std::string & sSrc)
{
// Note from RFC1630: "Sequences which start with a percent sign
// but are not followed by two hexadecimal characters (0-9, A-F) are reserved
// for future extension"
const unsigned char * pSrc = (const unsigned char *)sSrc.c_str();
const int SRC_LEN = sSrc.length();
const unsigned char * const SRC_END = pSrc + SRC_LEN;
const unsigned char * const SRC_LAST_DEC = SRC_END - 2; // last decodable '%'
char * const pStart = new char[SRC_LEN];
char * pEnd = pStart;
while (pSrc < SRC_LAST_DEC)
{
if (*pSrc == '%')
{
char dec1, dec2;
if (-1 != (dec1 = HEX2DEC[*(pSrc + 1)])
&& -1 != (dec2 = HEX2DEC[*(pSrc + 2)]))
{
*pEnd++ = (dec1 << 4) + dec2;
pSrc += 3;
continue;
}
}
*pEnd++ = *pSrc++;
}
// the last 2- chars
while (pSrc < SRC_END)
*pEnd++ = *pSrc++;
std::string sResult(pStart, pEnd);
delete [] pStart;
return sResult;
}
// Only alphanum is safe.
const char SAFE[256] =
{
/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
/* 0 */ 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
/* 1 */ 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
/* 2 */ 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
/* 3 */ 1,1,1,1, 1,1,1,1, 1,1,0,0, 0,0,0,0,
/* 4 */ 0,1,1,1, 1,1,1,1, 1,1,1,1, 1,1,1,1,
/* 5 */ 1,1,1,1, 1,1,1,1, 1,1,1,0, 0,0,0,0,
/* 6 */ 0,1,1,1, 1,1,1,1, 1,1,1,1, 1,1,1,1,
/* 7 */ 1,1,1,1, 1,1,1,1, 1,1,1,0, 0,0,0,0,
/* 8 */ 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
/* 9 */ 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
/* A */ 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
/* B */ 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
/* C */ 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
/* D */ 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
/* E */ 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
/* F */ 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0
};
std::string UriEncode(const std::string & sSrc)
{
const char DEC2HEX[16 + 1] = "0123456789ABCDEF";
const unsigned char * pSrc = (const unsigned char *)sSrc.c_str();
const int SRC_LEN = sSrc.length();
unsigned char * const pStart = new unsigned char[SRC_LEN * 3];
unsigned char * pEnd = pStart;
const unsigned char * const SRC_END = pSrc + SRC_LEN;
for (; pSrc < SRC_END; ++pSrc)
{
if (SAFE[*pSrc])
*pEnd++ = *pSrc;
else
{
// escape this char
*pEnd++ = '%';
*pEnd++ = DEC2HEX[*pSrc >> 4];
*pEnd++ = DEC2HEX[*pSrc & 0x0F];
}
}
std::string sResult((char *)pStart, (char *)pEnd);
delete [] pStart;
return sResult;
}
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