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/***************************************************************************/
/* This code is part of WWW grabber called pavuk */
/* Copyright (c) 1997 - 2001 Stefan Ondrejicka */
/* Distributed under GPL 2 or later */
/***************************************************************************/
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <time.h>
#include <limits.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "config.h"
#ifdef HAVE_BDB_18x
#ifdef HAVE_DB1_H
#include <db1/db.h>
#elif defined(HAVE_DB185_H)
#include <db_185.h>
#elif defined(HAVE_DB2_DB185_H)
#include <db2/db_185.h>
#elif defined(HAVE_DB3_DB185_H)
#include <db3/db_185.h>
#elif defined(HAVE_DB4_DB185_H)
#include <db4/db_185.h>
#else
#include <db.h>
#endif
typedef int int32__t;
typedef unsigned int uint32__t;
#ifdef WORDS_BIGENDIAN
#define COPY_INT32(i1,i2) \
((char *)(i1))[0] = ((char *)(i2))[3];\
((char *)(i1))[1] = ((char *)(i2))[2];\
((char *)(i1))[2] = ((char *)(i2))[1];\
((char *)(i1))[3] = ((char *)(i2))[0];
#else
#define COPY_INT32(i1,i2) *((int32__t *) i1) = *((int32__t *) i2);
#endif
static char *ns_cache_filename = NULL;
static DB *ns_cache_db = NULL;
static time_t ns_cache_db_modtime = 0L;
static void ns_cache_open_db(char *dirname)
{
bool_t reopen = FALSE;
HASHINFO hash_info = {
4 * 1024, /* bucket size */
0, /* fill factor */
0, /* number of elements */
96 * 1024, /* bytes to cache */
0, /* hash function */
0
}; /* byte order */
char pom[PATH_MAX];
LOCK_NSCACHE;
if(dirname)
{
struct stat estat;
snprintf(pom, sizeof(pom), "%s/index.db", dirname);
if(!ns_cache_filename || strcmp(pom, ns_cache_filename))
reopen = TRUE;
if(!reopen && !stat(pom, &estat) && estat.st_mtime != ns_cache_db_modtime)
reopen = TRUE;
}
else
{
_free(ns_cache_filename);
if(ns_cache_db)
ns_cache_db->close(ns_cache_db);
ns_cache_db = NULL;
ns_cache_db_modtime = 0L;
}
if(reopen && ns_cache_db)
{
_free(ns_cache_filename);
if(ns_cache_db)
ns_cache_db->close(ns_cache_db);
ns_cache_db = NULL;
ns_cache_db_modtime = 0L;
}
if(reopen)
{
struct stat estat;
ns_cache_db = dbopen(pom, O_RDONLY, 0600, DB_HASH, &hash_info);
if(!ns_cache_db)
{
xprintf(0, gettext("Unable to open Netscape cache index - %s\n"), pom);
}
if(!stat(pom, &estat))
ns_cache_db_modtime = estat.st_mtime;
_free(ns_cache_filename);
ns_cache_filename = tl_strdup(pom);
}
UNLOCK_NSCACHE;
}
static void ns_cache_gen_key(DBT *key, char *urlstr)
{
int32__t size, len;
char *tmp;
size = sizeof(int32__t); /* check sum */
size += sizeof(int32__t); /* size of urlstr */
size += strlen(urlstr) + 1; /* urlstr */
size += sizeof(int32__t); /* post data */
key->size = size;
key->data = (void *) malloc(size);
tmp = key->data;
COPY_INT32(tmp, &size);
tmp += sizeof(int32__t);
len = strlen(urlstr) + 1;
COPY_INT32(tmp, &len);
tmp += sizeof(int32__t);
strcpy(tmp, urlstr);
tmp += strlen(urlstr) + 1;
len = 0;
COPY_INT32(tmp, &len);
tmp += sizeof(int32__t);
}
static char *ns_cache_get_filename(DBT *data)
{
char *tmp = data->data;
tmp += sizeof(int32__t) /* size */
+ sizeof(int32__t) /* version */
+ sizeof(time_t) /* last_modified */
+ sizeof(time_t) /* last_accessed */
+ sizeof(time_t) /* expires */
+ sizeof(uint32__t) /* content_length */
+ sizeof(bool_t) /* is_netsite */
+ sizeof(time_t) /* lock_date */
+ sizeof(int32__t) /* size of filename */
;
return tmp;
}
char *ns_cache_find_localname(char *urlstr)
{
DBT key, data;
char *retv = NULL;
ns_cache_open_db(priv_cfg.ns_cache_dir);
LOCK_NSCACHE;
if(ns_cache_db)
{
ns_cache_gen_key(&key, urlstr);
if(!ns_cache_db->get(ns_cache_db, &key, &data, 0))
{
retv = tl_str_concat(NULL, cfg.ns_cache_dir, "/",
ns_cache_get_filename(&data), NULL);
}
_free(key.data);
}
UNLOCK_NSCACHE;
return retv;
}
#endif
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