#include <ctype.h>
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
<unsigned
char
>(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);
//字母和数字[0-9a-zA-Z]、一些特殊符号[$-_.+!*'(),] 、以及某些保留字[$&+,/:;=?@]
//可以不经过编码直接用于URL
if
(!((hex >= 48 && hex <= 57) ||
//0-9
(hex >=97 && hex <= 122) ||
//a-z
(hex >=65 && hex <= 90) ||
//A-Z
//一些特殊符号及保留字[$-_.+!*'(),] [$&+,/:;=?@]
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;
}