C/C++ URL编码，解码（提取自PHP）

URL解码函数：

Cpp代码


/* {{{ php_htoi

*/

static int php_htoi(char *s)

{

int value;

int c;

c = ((unsigned char *)s)[0];

if (isupper(c))

c = tolower(c);

value = (c >= '0' && c <= '9' ? c - '0' : c - 'a' + 10) * 16;

c = ((unsigned char *)s)[1];

if (isupper(c))

c = tolower(c);

value += c >= '0' && c <= '9' ? c - '0' : c - 'a' + 10;

return (value);

}

/* }}} */

/* {{{ URL解码，提取自PHP 5.2.17

用法：string urldecode(string str_source)

时间：2012-8-14 By Dewei

*/

string urldecode(string &str_source)

{

char const *in_str = str_source.c_str();

int in_str_len = strlen(in_str);

int out_str_len = 0;

string out_str;

char *str;

str = _strdup(in_str);

char *dest = str;

char *data = str;

while (in_str_len--) {

if (*data == '+') {

*dest = ' ';

}

else if (*data == '%' && in_str_len >= 2 && isxdigit((int) *(data + 1))

&& isxdigit((int) *(data + 2))) {

*dest = (char) php_htoi(data + 1);

data += 2;

in_str_len -= 2;

} else {

*dest = *data;

}

data++;

dest++;

}

*dest = '\0';

out_str_len = dest - str;

out_str = str;

free(str);

return out_str;

}

/* }}} */

URL编码函数：

Cpp代码


/* {{{ URL编码，提取自PHP

用法：string urlencode(string str_source)

说明：仅不编码 -_. 其余全部编码，空格会被编码为 +

时间：2012-8-13 By Dewei

*/

string urlencode(string &str_source)

{

char const *in_str = str_source.c_str();

int in_str_len = strlen(in_str);

int out_str_len = 0;

string out_str;

register unsigned char c;

unsigned char *to, *start;

unsigned char const *from, *end;

unsigned char hexchars[] = "0123456789ABCDEF";

from = (unsigned char *)in_str;

end = (unsigned char *)in_str + in_str_len;

start = to = (unsigned char *) malloc(3*in_str_len+1);

while (from < end) {

c = *from++;

if (c == ' ') {

*to++ = '+';

} else if ((c < '0' && c != '-' && c != '.') ||

(c < 'A' && c > '9') ||

(c > 'Z' && c < 'a' && c != '_') ||

(c > 'z')) {

to[0] = '%';

to[1] = hexchars[c >> 4];

to[2] = hexchars[c & 15];

to += 3;

} else {

*to++ = c;

}

}

*to = 0;

out_str_len = to - start;

out_str = (char *) start;

free(start);

return out_str;

}

/* }}} */

/* {{{ URL编码CString版，提取自PHP 5.2.17

用法：CString urlencode(CString str_source)

说明：仅不编码 -_. 其余全部编码，空格会被编码为 +

时间：2012-8-13 By Dewei

*/

CString urlencode(CString &str_source)

{

char const *in_str = str_source;

int in_str_len = strlen(in_str);

int out_str_len = 0;

CString out_str = '\0';

register unsigned char c;

unsigned char *to, *start;

unsigned char const *from, *end;

unsigned char hexchars[] = "0123456789ABCDEF";

from = (unsigned char *)in_str;

end = (unsigned char *)in_str + in_str_len;

start = to = (unsigned char *) malloc(3*in_str_len+1);

while (from < end) {

c = *from++;

if (c == ' ') {

*to++ = '+';

} else if ((c < '0' && c != '-' && c != '.') ||

(c < 'A' && c > '9') ||

(c > 'Z' && c < 'a' && c != '_') ||

(c > 'z')) {

to[0] = '%';

to[1] = hexchars[c >> 4];

to[2] = hexchars[c & 15];

to += 3;

} else {

*to++ = c;

}

}

*to = 0;

out_str_len = to - start;

out_str = (char *) start;

free(start);

return out_str;

}