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/*
* DEBUG: section 25 MiME Header Parsing
* AUTHOR: Harvest Derived
*
* 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"
#define GET_HDR_SZ 1024
#include "Debug.h"
#include "profiler/Profiler.h"
/*
* returns a pointer to a field-value of the first matching field-name where
* field-value matches prefix if any
*/
char *
mime_get_header_field(const char *mime, const char *name, const char *prefix)
{
LOCAL_ARRAY(char, header, GET_HDR_SZ);
const char *p = NULL;
char *q = NULL;
char got = 0;
const int namelen = name ? strlen(name) : 0;
const int preflen = prefix ? strlen(prefix) : 0;
int l;
if (NULL == mime)
return NULL;
assert(NULL != name);
debugs(25, 5, "mime_get_header: looking for '" << name << "'");
for (p = mime; *p; p += strcspn(p, "\n")) {
if (strcmp(p, "\n\r\n") == 0 || strcmp(p, "\n\n") == 0)
return NULL;
if (*p == '\n')
++p;
if (strncasecmp(p, name, namelen))
continue;
if (!xisspace(p[namelen]) && p[namelen] != ':')
continue;
l = strcspn(p, "\n\r") + 1;
if (l > GET_HDR_SZ)
l = GET_HDR_SZ;
xstrncpy(header, p, l);
debugs(25, 5, "mime_get_header: checking '" << header << "'");
q = header;
q += namelen;
if (*q == ':') {
++q;
got = 1;
}
while (xisspace(*q)) {
++q;
got = 1;
}
if (got && prefix) {
/* we could process list entries here if we had strcasestr(). */
/* make sure we did not match a part of another field-value */
got = !strncasecmp(q, prefix, preflen) && !xisalpha(q[preflen]);
}
if (got) {
debugs(25, 5, "mime_get_header: returning '" << q << "'");
return q;
}
}
return NULL;
}
/* returns a pointer to a field-value of the first matching field-name */
char *
mime_get_header(const char *mime, const char *name)
{
return mime_get_header_field(mime, name, NULL);
}
size_t
headersEnd(const char *mime, size_t l)
{
size_t e = 0;
int state = 1;
PROF_start(headersEnd);
while (e < l && state < 3) {
switch (state) {
case 0:
if ('\n' == mime[e])
state = 1;
break;
case 1:
if ('\r' == mime[e])
state = 2;
else if ('\n' == mime[e])
state = 3;
else
state = 0;
break;
case 2:
if ('\n' == mime[e])
state = 3;
else
state = 0;
break;
default:
break;
}
++e;
}
PROF_stop(headersEnd);
if (3 == state)
return e;
return 0;
}
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