1 /* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements. See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License. You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #ifndef MOD_DISK_CACHE_H
18 #define MOD_DISK_CACHE_H
20 #include "mod_cache.h"
21 #include "apr_file_io.h"
23 #include "cache_common.h"
26 * include for mod_disk_cache: Disk Based HTTP 1.1 Cache.
39 * Pointed to by cache_object_t::vobj
41 typedef struct disk_cache_object {
42 const char *root; /* the location of the cache directory */
45 disk_cache_file_t data; /* data file structure */
46 disk_cache_file_t hdrs; /* headers file structure */
47 disk_cache_file_t vary; /* vary file structure */
48 const char *hashfile; /* Computed hash key for this URI */
49 const char *name; /* Requested URI without vary bits - suitable for mortals. */
50 const char *key; /* On-disk prefix; URI with Vary bits (if present) */
51 apr_off_t file_size; /* File size of the cached data file */
52 disk_cache_info_t disk_info; /* Header information. */
53 apr_bucket_brigade *bb; /* Set aside brigade */
54 apr_table_t *headers_in; /* Input headers to save */
55 apr_table_t *headers_out; /* Output headers to save */
56 apr_off_t offset; /* Max size to set aside */
57 apr_time_t timeout; /* Max time to set aside */
58 int done:1; /* Is the attempt to cache complete? */
59 } disk_cache_object_t;
63 * mod_disk_cache configuration
65 /* TODO: Make defaults OS specific */
66 #define CACHEFILE_LEN 20 /* must be less than HASH_LEN/2 */
67 #define DEFAULT_DIRLEVELS 2
68 #define DEFAULT_DIRLENGTH 2
69 #define DEFAULT_MIN_FILE_SIZE 1
70 #define DEFAULT_MAX_FILE_SIZE 1000000
71 #define DEFAULT_READSIZE 0
72 #define DEFAULT_READTIME 0
75 const char* cache_root;
76 apr_size_t cache_root_len;
77 int dirlevels; /* Number of levels of subdirectories */
78 int dirlength; /* Length of subdirectory names */
82 apr_off_t minfs; /* minimum file size for cached files */
83 apr_off_t maxfs; /* maximum file size for cached files */
84 apr_off_t readsize; /* maximum data to attempt to cache in one go */
85 apr_time_t readtime; /* maximum time taken to cache in one go */
90 } disk_cache_dir_conf;
92 #endif /*MOD_DISK_CACHE_H*/