C + + implementation UrlEncode and UrlDecode

#include "stdafx.h"

#include

#include

#include

using namespace Std;

std::string urlencode (const std::string& Sztoencode)

{

std::string src = sztoencode;

Char hex[] = "0123456789ABCDEF";

string DST;

for (size_t i = 0; i < src.size (); ++i)

{

unsigned char cc = src[i];

if (Isascii (cc))

{

if (cc = = ")

{

DST + + "%20";

}

Else

DST + + cc;

}

Else

{

unsigned char c = static_cast (Src[i]);

DST + = '% ';

DST + + HEX[C/16];

DST + + hex[c% 16];

}

}

return DST;

}

std::string urldecode (const std::string& Sztodecode)

{

std::string result;

int hex = 0;

for (size_t i = 0; i < sztodecode.length (); ++i)

{

Switch (Sztodecode[i])

{

Case ' + ':

result = = ';

Break

Case '% ':

if (Isxdigit (Sztodecode[i + 1]) && isxdigit (Sztodecode[i + 2])

{

std::string hexstr = sztodecode.substr (i + 1, 2);

Hex = Strtol (hexstr.c_str (), 0, 16);

Letters and numbers [0-9a-za-z], some special symbols [$-_.+!* ' (),], and some reserved words [$&+,/:;=?@]

can be used without encoding directly for URLs

if (!) ( (Hex >= && hex <= 57) | | 0-9

(Hex >=97 && hex <= 122) | | A-Z

(Hex >=65 && hex <= 90) | | A-Z

Some special symbols and reserved words [$-_.+!* ' (),] [$&+,/:;=?@]

Hex = = 0x21 | | Hex = = 0x24 | | Hex = = 0x26 | | Hex = = 0X27 | | Hex = = 0x28 | | Hex = = 0x29

|| Hex = = 0X2A | | Hex = = 0x2b| | Hex = = 0X2C | | Hex = = 0x2d | | Hex = = 0x2e | | Hex = = 0x2f

|| Hex = = 0X3A | | Hex = = 0x3b| | Hex = = 0x3d | | Hex = = 0x3f | | Hex = = 0x40 | | Hex = = 0x5f

))

{

Result + = char (hex);

i + 2;

}

else result = '% ';

}else {

result = '% ';

}

Break

Default

result = Sztodecode[i];

Break

}

}

return result;

}

/*

int main ()

{

String test_str1 = "Shuangshuang";

String test_str2 = UrlEncode (TEST_STR1);

cout << test_str2 << Endl;

}

*/