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#include <cstring>
#include "kingate/util.h"
#include "kingate/exception.h"
namespace kingate {
static const char *safeChars =
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz"
"0123456789"
"_-" ;
string url_encode(const string& str) {
string rv = str;
string::size_type screwed = 0;
for(;;) {
screwed = rv.find_first_not_of(safeChars,screwed);
if(screwed == string::npos)
break;
while(screwed<rv.length() && !strchr(safeChars,rv.at(screwed))) {
char danger = rv.at(screwed);
if(danger==' ') {
rv.replace(screwed++,1,1,'+');
}else{
static char tmp[4] = {'%',0,0,0};
snprintf(&tmp[1],3,"%02X",0xFF&(int)danger);
rv.replace(screwed,1,tmp,3);
screwed+=3;
}
}
}
return rv;
}
string url_decode(const string& str) {
string rv = str;
string::size_type unscrewed = 0;
for(;;) {
unscrewed = rv.find_first_of("%+",unscrewed);
if(unscrewed == string::npos)
break;
if(rv.at(unscrewed)=='+') {
rv.replace(unscrewed++,1,1,' ');
}else{
if((rv.length()-unscrewed)<3)
throw exception(CODEPOINT,"incorrectly escaped string");
// XXX: ensure it's hex?
int danger = strtol(rv.substr(unscrewed+1,2).c_str(),NULL,16);
rv.replace(unscrewed,3,1,danger);
unscrewed++;
}
}
return rv;
}
/*
* RFC 2616:
*
* separators = "(" | ")" | "<" | ">" | "@"
* | "," | ";" | ":" | "\" | <">
* | "/" | "[" | "]" | "?" | "="
* | "{" | "}" | SP | HT
*/
/*
* RFC 2616:
*
* token = 1*<any CHAR except CTLs or separators>
*/
static const char *quotible_chars =
"\001\002\003\004\005\006\007\010"
"\011\012\013\014\015\016\017\020"
"\021\022\023\024\025\026\027\030"
"\031\032\033\034\035\036\037\040"
"()<>@,;:\\\"/[]?={}" /* separator chars (except for SP and HT mentioned elsewhere */
"\177"
;
/*
* RFC 2616:
*
* quoted-string = ( <"> *(qdtext | quoted-pair ) <"> )
* qdtext = <any TEXT except <">>
*
* The backslash character ("\") MAY be used as a single-character
* quoting mechanism only within quoted-string and comment constructs.
*
* quoted-pair = "\" CHAR
*/
string http_quoted_string(const string& str) {
string rv = str;
string::size_type sp=0;
for(string::size_type q=rv.find('"');(q=rv.find('"',q))!=string::npos;q+=2)
rv.insert(q,1,'\\');
rv.insert(0,1,'"');
rv += '"';
return rv;
}
string http_quote(const string& str) {
if(str.find_first_of(quotible_chars)==string::npos)
return str;
return http_quoted_string(str);
}
}
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