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/*
* $Id$
*
* DEBUG: none ETag parsing support
* AUTHOR: Alex Rousskov
*
* SQUID Web Proxy Cache http://www.squid-cache.org/
* ----------------------------------------------------------
*
* Squid is the result of efforts by numerous individuals from
* the Internet community; see the CONTRIBUTORS file for full
* details. Many organizations have provided support for Squid's
* development; see the SPONSORS file for full details. Squid is
* Copyrighted (C) 2001 by the Regents of the University of
* California; see the COPYRIGHT file for full details. Squid
* incorporates software developed and/or copyrighted by other
* sources; see the CREDITS file for full details.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
*
*/
#include "squid.h"
/*
* Note: ETag is not an http "field" like, for example HttpHdrRange. ETag is a
* field-value that maybe used in many http fields.
*/
/// whether etag strings match
static bool
etagStringsMatch(const ETag &tag1, const ETag &tag2)
{
return !strcmp(tag1.str, tag2.str);
}
/* parses a string as weak or strong entity-tag; returns true on success */
/* note: we do not duplicate "str"! */
int
etagParseInit(ETag * etag, const char *str)
{
int len;
assert(etag && str);
etag->str = NULL;
etag->weak = !strncmp(str, "W/", 2);
if (etag->weak)
str += 2;
/* check format (quoted-string) */
len = strlen(str);
if (len >= 2 && str[0] == '"' && str[len - 1] == '"')
etag->str = str;
return etag->str != NULL;
}
bool
etagIsStrongEqual(const ETag &tag1, const ETag &tag2)
{
return !tag1.weak && !tag2.weak && etagStringsMatch(tag1, tag2);
}
bool
etagIsWeakEqual(const ETag &tag1, const ETag &tag2)
{
return etagStringsMatch(tag1, tag2);
}
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