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elinks/src/cookies/parser.c

92 lines
2.0 KiB
C

/* Cookies name-value pairs parser */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include "elinks.h"
#include "cookies/parser.h"
#include "util/string.h"
/* In order to be able to compile parsetst, you should try to use minimum
* of foreign stuff here. */
#if 0
static inline void
debug_cookie_parser(struct cookie_str *cstr, char *pos, int ws, int eq)
{
int namelen = int_max(cstr->nam_end - cstr->str, 0);
int valuelen = int_max(cstr->val_end - cstr->val_start, 0);
printf("[%.*s] :: (%.*s) :: %d,%d [%s] %d\n",
namelen, cstr->str,
valuelen, cstr->val_start,
ws, eq, pos, cstr->nam_end - cstr->str);
}
#else
#define debug_cookie_parser(cstr, pos, ws, eq)
#endif
/* This function parses the starting name/value pair from the cookie string.
* The syntax is simply: <name token> [ '=' <value token> ] with possible
* spaces between tokens and '='. However spaces in the value token is also
* allowed. See bug 174 for a description why. */
/* Defined in RFC 2965. */
/* Return cstr on success, NULL on failure. */
struct cookie_str *
parse_cookie_str(struct cookie_str *cstr, char *str)
{
memset(cstr, 0, sizeof(*cstr));
cstr->str = str;
/* Parse name token */
while (*str != ';' && *str != '=' && !isspace((unsigned char)*str) && *str)
str++;
/* Bail out if name token is empty */
if (str == cstr->str) return NULL;
cstr->nam_end = str;
skip_space(str);
switch (*str) {
case '\0':
case ';':
/* No value token, so just set to empty value */
cstr->val_start = str;
cstr->val_end = str;
return cstr;
case '=':
/* Map 'a===b' to 'a=b' */
do str++; while (*str == '=');
break;
default:
/* No spaces in the name token is allowed */
return NULL;
}
skip_space(str);
/* Parse value token */
/* Start with empty value, so even 'a=' will work */
cstr->val_start = str;
cstr->val_end = str;
for (; *str != ';' && *str; str++) {
/* Allow spaces in the value but leave out ending spaces */
if (!isspace((unsigned char)*str))
cstr->val_end = str + 1;
}
return cstr;
}