When creating new REST-ful API for GTAT (based upon my pwncurl and a lua backend) I had to implement the method urlencode in pawn.
So I took a look at the specification in RFC 1738 to get information about what characters need to be encoded.
RFC 1738: Only alphanumerics, the special characters "$-_.+!*'(),", and reserved characters used for their reserved purposes may be used unencoded within a URL.
Since I really want to be sure that all is encoded properly and %xx encoding is
<!--more-->allowed, too - even if not neceassary - my urlencode function encodes every character except A-Z,a-z,0-9,'-','_' and '.'.
/**
* Url encodes a specific string
* @param string string
*/
stock urlencode(string[]) {
new ret[MAX_STRING];
ret[0] = 0;
new i = 0;
new p = 0;
new s = 0;
while (string[i] != 0) {
if (
(string[i] >= 'A' && string[i] <='Z')
|| (string[i] >= 'a' && string[i] <='z')
|| (string[i] >= '0' && string[i] <='9')
|| (string[i] == '-')
|| (string[i] == '_')
|| (string[i] == '.')
) {
ret[p] = string[i];
} else {
//
ret[p] = '%';
p++;
s = (string[i] % 16); //
ret[p+1] = (s>9) ? (55+s) : (48+s); // 64 - 9 = 55
s = floatround((string[i] - s)/16);
ret[p] = (s>9) ? (55+s) : (48+s); // 64 - 9 = 55
p++;
}
p++;
i++;
}
return ret;
}
This function will also be part of next release of dutils.
