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ap_compat.h
1.08
KB
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2006-07-12 00:33
ap_config.h
6.65
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2012-08-15 03:59
ap_config_layout.h
1.21
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2022-01-02 15:34
ap_expr.h
14.09
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2020-02-21 02:33
ap_hooks.h
6.01
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2011-09-23 22:08
ap_listen.h
5.85
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2016-05-30 23:26
ap_mmn.h
39.26
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2023-08-29 11:23
ap_mpm.h
10.68
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2020-04-23 16:32
ap_provider.h
3.55
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2012-07-03 23:29
ap_regex.h
11.43
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2022-02-28 13:56
ap_regkey.h
9.18
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2011-09-23 17:38
ap_release.h
3.15
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2023-10-16 17:28
ap_slotmem.h
7.26
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2013-11-17 22:10
ap_socache.h
9.39
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2012-02-11 00:47
apache_noprobes.h
15.93
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2012-04-05 00:11
apr.h
18.28
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2023-03-27 15:53
apr_allocator.h
6.25
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2018-08-25 17:48
apr_anylock.h
5.06
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2007-01-15 21:00
apr_atomic.h
6.25
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2018-09-17 22:20
apr_base64.h
3.86
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2012-12-23 00:24
apr_buckets.h
64.71
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2021-09-18 17:25
apr_crypto.h
20.18
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2017-06-14 00:28
apr_cstr.h
11.42
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2016-12-03 22:49
apr_date.h
3.57
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2007-01-15 21:00
apr_dbd.h
23.88
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2017-04-02 21:57
apr_dbm.h
8.62
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2008-11-21 08:20
apr_dso.h
2.73
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2006-08-03 14:55
apr_encode.h
30.98
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2022-10-18 11:38
apr_env.h
2.12
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2009-09-26 00:07
apr_errno.h
55.08
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2016-03-03 18:11
apr_escape.h
17.65
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2018-08-26 14:24
apr_escape_test_char.h
1.4
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2023-03-27 15:53
apr_file_info.h
17.59
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2018-08-26 14:01
apr_file_io.h
43.11
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2017-03-30 23:53
apr_fnmatch.h
6.23
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2014-04-15 17:55
apr_general.h
7.36
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2018-08-26 14:01
apr_getopt.h
6
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2006-08-03 14:55
apr_global_mutex.h
7.38
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2017-04-08 01:20
apr_hash.h
10.36
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2020-11-08 10:13
apr_hooks.h
12.71
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2013-10-03 17:32
apr_inherit.h
2.14
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2013-10-03 17:29
apr_ldap.h
5.76
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2023-01-24 11:36
apr_ldap_init.h
5.81
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2009-02-19 10:04
apr_ldap_option.h
8.65
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2009-02-19 10:04
apr_ldap_rebind.h
3.19
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2009-02-19 10:04
apr_ldap_url.h
3.83
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2009-02-19 10:04
apr_lib.h
8.47
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2014-01-16 22:26
apr_md4.h
4.55
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2007-01-15 21:00
apr_md5.h
6.37
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2012-07-06 15:41
apr_memcache.h
17.25
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2010-11-26 16:39
apr_mmap.h
5.18
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2013-10-03 17:29
apr_network_io.h
36.95
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2019-05-04 18:44
apr_optional.h
2.8
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2007-01-15 21:00
apr_optional_hooks.h
3.9
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2013-10-03 17:32
apr_perms_set.h
1.93
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2014-04-28 16:08
apr_poll.h
21.04
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2016-03-25 03:19
apr_pools.h
31.73
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2022-06-18 00:09
apr_portable.h
20.56
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2018-08-26 14:01
apr_proc_mutex.h
7.04
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2017-04-08 01:20
apr_queue.h
4.12
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2013-10-03 17:32
apr_random.h
5.07
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2007-07-21 06:16
apr_redis.h
16.07
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2017-09-27 20:02
apr_reslist.h
7.19
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2013-10-03 17:32
apr_ring.h
19.28
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2022-01-06 14:11
apr_rmm.h
4.8
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2007-01-15 21:00
apr_sdbm.h
6.14
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2007-10-23 13:59
apr_sha1.h
3.91
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2007-01-15 21:00
apr_shm.h
9.48
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2014-04-28 17:15
apr_signal.h
2.8
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2007-08-05 19:48
apr_siphash.h
6.16
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2017-06-15 00:00
apr_skiplist.h
14.56
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2018-08-25 17:48
apr_strings.h
14.92
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2018-08-26 14:01
apr_strmatch.h
2.69
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2007-01-15 21:00
apr_support.h
1.65
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2006-08-03 14:55
apr_tables.h
19.4
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2020-11-08 09:24
apr_thread_cond.h
5.53
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2007-06-29 21:20
apr_thread_mutex.h
4.51
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2017-04-08 01:20
apr_thread_pool.h
11.14
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2008-05-07 23:45
apr_thread_proc.h
36.11
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2019-03-08 16:52
apr_thread_rwlock.h
4.78
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2006-08-03 14:55
apr_time.h
7.62
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2016-03-05 03:40
apr_uri.h
6.61
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2009-01-07 22:39
apr_user.h
5.34
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2013-10-03 17:29
apr_uuid.h
2.13
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2007-01-15 21:00
apr_version.h
5.44
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2023-04-13 11:38
apr_want.h
3.01
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2012-08-15 00:48
apr_xlate.h
6.42
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2007-01-15 21:00
apr_xml.h
12.54
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2016-06-14 01:57
apu.h
4.76
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2023-01-24 11:36
apu_errno.h
5.49
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2009-01-07 22:35
apu_version.h
4.33
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2023-02-01 09:56
apu_want.h
1.55
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2023-01-24 11:36
cache_common.h
2.02
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2013-05-29 00:30
expat.h
43.55
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2022-10-25 19:09
heartbeat.h
1.62
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2014-06-17 16:06
http_config.h
57.78
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2022-02-23 16:39
http_connection.h
7.15
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2021-09-26 18:11
http_core.h
37.25
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2023-08-29 11:23
http_log.h
36.82
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2016-08-25 16:48
http_main.h
3.25
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2012-03-26 02:24
http_protocol.h
42.06
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2022-06-01 16:34
http_request.h
26.34
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2021-08-10 12:27
http_ssl.h
14.93
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2022-08-22 00:26
http_vhost.h
4.61
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2021-05-27 17:08
httpd.h
94.69
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2022-03-09 16:04
mod_auth.h
4.55
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2020-02-21 02:33
mod_cache.h
7.27
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2011-12-03 20:02
mod_cgi.h
2.5
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2011-09-23 17:38
mod_core.h
3.43
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2012-09-24 13:49
mod_dav.h
100.22
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2023-01-09 16:52
mod_dbd.h
4.18
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2011-09-23 17:38
mod_http2.h
4.69
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2023-08-29 11:23
mod_include.h
4.01
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2011-09-23 17:38
mod_log_config.h
2.5
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2011-09-23 17:38
mod_proxy.h
64.99
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2023-03-31 18:33
mod_request.h
1.65
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2011-02-18 20:40
mod_rewrite.h
1.41
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2014-01-23 16:33
mod_so.h
1.23
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2011-11-30 12:21
mod_ssl.h
4.99
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2019-07-30 15:23
mod_ssl_openssl.h
4.79
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2019-07-30 15:23
mod_status.h
2.45
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2006-07-12 00:33
mod_watchdog.h
7.55
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2014-09-05 18:19
mpm_common.h
17.39
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2021-08-10 12:43
os.h
4.5
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2021-04-21 05:10
scoreboard.h
9.98
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2020-02-21 02:33
util_cfgtree.h
3.17
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2011-09-23 17:38
util_charset.h
2.28
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2014-11-01 11:19
util_cookies.h
4.99
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2012-01-09 15:18
util_ebcdic.h
2.78
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2014-11-01 11:19
util_fcgi.h
10.02
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2020-02-21 02:33
util_filter.h
26.46
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2013-04-15 16:37
util_ldap.h
18.33
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2023-07-07 16:03
util_md5.h
2.19
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2014-07-17 02:11
util_mutex.h
9.29
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2011-10-09 22:35
util_script.h
9.8
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2012-01-09 15:18
util_time.h
4.22
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2023-07-18 01:16
util_varbuf.h
8.28
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2014-07-19 21:22
util_xml.h
1.36
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2014-07-19 21:22
zconf.h
16.83
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2023-04-18 01:35
zlib.h
96.4
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2023-08-18 12:45
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/* Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /** * @file util_filter.h * @brief Apache filter library */ #ifndef AP_FILTER_H #define AP_FILTER_H #include "apr.h" #include "apr_buckets.h" #include "httpd.h" #if APR_HAVE_STDARG_H #include <stdarg.h> #endif #ifdef __cplusplus extern "C" { #endif /** * @brief input filtering modes */ typedef enum { /** The filter should return at most readbytes data. */ AP_MODE_READBYTES, /** The filter should return at most one line of CRLF data. * (If a potential line is too long or no CRLF is found, the * filter may return partial data). */ AP_MODE_GETLINE, /** The filter should implicitly eat any CRLF pairs that it sees. */ AP_MODE_EATCRLF, /** The filter read should be treated as speculative and any returned * data should be stored for later retrieval in another mode. */ AP_MODE_SPECULATIVE, /** The filter read should be exhaustive and read until it can not * read any more. * Use this mode with extreme caution. */ AP_MODE_EXHAUSTIVE, /** The filter should initialize the connection if needed, * NNTP or FTP over SSL for example. */ AP_MODE_INIT } ap_input_mode_t; /** * @defgroup APACHE_CORE_FILTER Filter Chain * @ingroup APACHE_CORE * * Filters operate using a "chaining" mechanism. The filters are chained * together into a sequence. When output is generated, it is passed through * each of the filters on this chain, until it reaches the end (or "bottom") * and is placed onto the network. * * The top of the chain, the code generating the output, is typically called * a "content generator." The content generator's output is fed into the * filter chain using the standard Apache output mechanisms: ap_rputs(), * ap_rprintf(), ap_rwrite(), etc. * * Each filter is defined by a callback. This callback takes the output from * the previous filter (or the content generator if there is no previous * filter), operates on it, and passes the result to the next filter in the * chain. This pass-off is performed using the ap_fc_* functions, such as * ap_fc_puts(), ap_fc_printf(), ap_fc_write(), etc. * * When content generation is complete, the system will pass an "end of * stream" marker into the filter chain. The filters will use this to flush * out any internal state and to detect incomplete syntax (for example, an * unterminated SSI directive). * * @{ */ /* forward declare the filter type */ typedef struct ap_filter_t ap_filter_t; /** * @name Filter callbacks * * This function type is used for filter callbacks. It will be passed a * pointer to "this" filter, and a "bucket brigade" containing the content * to be filtered. * * In filter->ctx, the callback will find its context. This context is * provided here, so that a filter may be installed multiple times, each * receiving its own per-install context pointer. * * Callbacks are associated with a filter definition, which is specified * by name. See ap_register_input_filter() and ap_register_output_filter() * for setting the association between a name for a filter and its * associated callback (and other information). * * If the initialization function argument passed to the registration * functions is non-NULL, it will be called iff the filter is in the input * or output filter chains and before any data is generated to allow the * filter to prepare for processing. * * The bucket brigade always belongs to the caller, but the filter * is free to use the buckets within it as it sees fit. Normally, * the brigade will be returned empty. Buckets *may not* be retained * between successive calls to the filter unless they have been * "set aside" with a call apr_bucket_setaside. Typically this will * be done with ap_save_brigade(). Buckets removed from the brigade * become the responsibility of the filter, which must arrange for * them to be deleted, either by doing so directly or by inserting * them in a brigade which will subsequently be destroyed. * * For the input and output filters, the return value of a filter should be * an APR status value. For the init function, the return value should * be an HTTP error code or OK if it was successful. * * @ingroup filter * @{ */ typedef apr_status_t (*ap_out_filter_func)(ap_filter_t *f, apr_bucket_brigade *b); typedef apr_status_t (*ap_in_filter_func)(ap_filter_t *f, apr_bucket_brigade *b, ap_input_mode_t mode, apr_read_type_e block, apr_off_t readbytes); typedef int (*ap_init_filter_func)(ap_filter_t *f); typedef union ap_filter_func { ap_out_filter_func out_func; ap_in_filter_func in_func; } ap_filter_func; /** @} */ /** * Filters have different types/classifications. These are used to group * and sort the filters to properly sequence their operation. * * The types have a particular sort order, which allows us to insert them * into the filter chain in a determistic order. Within a particular grouping, * the ordering is equivalent to the order of calls to ap_add_*_filter(). */ typedef enum { /** These filters are used to alter the content that is passed through * them. Examples are SSI or PHP. */ AP_FTYPE_RESOURCE = 10, /** These filters are used to alter the content as a whole, but after all * AP_FTYPE_RESOURCE filters are executed. These filters should not * change the content-type. An example is deflate. */ AP_FTYPE_CONTENT_SET = 20, /** These filters are used to handle the protocol between server and * client. Examples are HTTP and POP. */ AP_FTYPE_PROTOCOL = 30, /** These filters implement transport encodings (e.g., chunking). */ AP_FTYPE_TRANSCODE = 40, /** These filters will alter the content, but in ways that are * more strongly associated with the connection. Examples are * splitting an HTTP connection into multiple requests and * buffering HTTP responses across multiple requests. * * It is important to note that these types of filters are not * allowed in a sub-request. A sub-request's output can certainly * be filtered by ::AP_FTYPE_RESOURCE filters, but all of the "final * processing" is determined by the main request. */ AP_FTYPE_CONNECTION = 50, /** These filters don't alter the content. They are responsible for * sending/receiving data to/from the client. */ AP_FTYPE_NETWORK = 60 } ap_filter_type; /** * This is the request-time context structure for an installed filter (in * the output filter chain). It provides the callback to use for filtering, * the request this filter is associated with (which is important when * an output chain also includes sub-request filters), the context for this * installed filter, and the filter ordering/chaining fields. * * Filter callbacks are free to use ->ctx as they please, to store context * during the filter process. Generally, this is superior over associating * the state directly with the request. A callback should not change any of * the other fields. */ typedef struct ap_filter_rec_t ap_filter_rec_t; typedef struct ap_filter_provider_t ap_filter_provider_t; /** * @brief This structure is used for recording information about the * registered filters. It associates a name with the filter's callback * and filter type. * * At the moment, these are simply linked in a chain, so a ->next pointer * is available. * * It is used for any filter that can be inserted in the filter chain. * This may be either a httpd-2.0 filter or a mod_filter harness. * In the latter case it contains dispatch, provider and protocol information. * In the former case, the new fields (from dispatch) are ignored. */ struct ap_filter_rec_t { /** The registered name for this filter */ const char *name; /** The function to call when this filter is invoked. */ ap_filter_func filter_func; /** The function to call directly before the handlers are invoked * for a request. The init function is called once directly * before running the handlers for a request or subrequest. The * init function is never called for a connection filter (with * ftype >= AP_FTYPE_CONNECTION). Any use of this function for * filters for protocols other than HTTP is specified by the * module supported that protocol. */ ap_init_filter_func filter_init_func; /** The next filter_rec in the list */ struct ap_filter_rec_t *next; /** Providers for this filter */ ap_filter_provider_t *providers; /** The type of filter, either AP_FTYPE_CONTENT or AP_FTYPE_CONNECTION. * An AP_FTYPE_CONTENT filter modifies the data based on information * found in the content. An AP_FTYPE_CONNECTION filter modifies the * data based on the type of connection. */ ap_filter_type ftype; /** Trace level for this filter */ int debug; /** Protocol flags for this filter */ unsigned int proto_flags; }; /** * @brief The representation of a filter chain. * * Each request has a list * of these structures which are called in turn to filter the data. Sub * requests get an exact copy of the main requests filter chain. */ struct ap_filter_t { /** The internal representation of this filter. This includes * the filter's name, type, and the actual function pointer. */ ap_filter_rec_t *frec; /** A place to store any data associated with the current filter */ void *ctx; /** The next filter in the chain */ ap_filter_t *next; /** The request_rec associated with the current filter. If a sub-request * adds filters, then the sub-request is the request associated with the * filter. */ request_rec *r; /** The conn_rec associated with the current filter. This is analogous * to the request_rec, except that it is used for connection filters. */ conn_rec *c; }; /** * Get the current bucket brigade from the next filter on the filter * stack. The filter returns an apr_status_t value. If the bottom-most * filter doesn't read from the network, then ::AP_NOBODY_READ is returned. * The bucket brigade will be empty when there is nothing left to get. * @param filter The next filter in the chain * @param bucket The current bucket brigade. The original brigade passed * to ap_get_brigade() must be empty. * @param mode The way in which the data should be read * @param block How the operations should be performed * ::APR_BLOCK_READ, ::APR_NONBLOCK_READ * @param readbytes How many bytes to read from the next filter. */ AP_DECLARE(apr_status_t) ap_get_brigade(ap_filter_t *filter, apr_bucket_brigade *bucket, ap_input_mode_t mode, apr_read_type_e block, apr_off_t readbytes); /** * Pass the current bucket brigade down to the next filter on the filter * stack. The filter returns an apr_status_t value. If the bottom-most * filter doesn't write to the network, then ::AP_NOBODY_WROTE is returned. * @param filter The next filter in the chain * @param bucket The current bucket brigade * * @remark Ownership of the brigade is retained by the caller. On return, * the contents of the brigade are UNDEFINED, and the caller must * either call apr_brigade_cleanup or apr_brigade_destroy on * the brigade. */ AP_DECLARE(apr_status_t) ap_pass_brigade(ap_filter_t *filter, apr_bucket_brigade *bucket); /** * Pass the current bucket brigade down to the next filter on the filter * stack checking for filter errors. The filter returns an apr_status_t value. * Returns ::OK if the brigade is successfully passed * ::AP_FILTER_ERROR on a filter error * ::HTTP_INTERNAL_SERVER_ERROR on all other errors * @param r The request rec * @param bucket The current bucket brigade * @param fmt The format string. If NULL defaults to "ap_pass_brigade returned" * @param ... The arguments to use to fill out the format string * @remark Ownership of the brigade is retained by the caller. On return, * the contents of the brigade are UNDEFINED, and the caller must * either call apr_brigade_cleanup or apr_brigade_destroy on * the brigade. */ AP_DECLARE(apr_status_t) ap_pass_brigade_fchk(request_rec *r, apr_bucket_brigade *bucket, const char *fmt, ...) __attribute__((format(printf,3,4))); /** * This function is used to register an input filter with the system. * After this registration is performed, then a filter may be added * into the filter chain by using ap_add_input_filter() and simply * specifying the name. * * @param name The name to attach to the filter function * @param filter_func The filter function to name * @param filter_init The function to call before the filter handlers are invoked * @param ftype The type of filter function, either ::AP_FTYPE_CONTENT_SET or * ::AP_FTYPE_CONNECTION * @see add_input_filter() */ AP_DECLARE(ap_filter_rec_t *) ap_register_input_filter(const char *name, ap_in_filter_func filter_func, ap_init_filter_func filter_init, ap_filter_type ftype); /** @deprecated @see ap_register_output_filter_protocol */ AP_DECLARE(ap_filter_rec_t *) ap_register_output_filter(const char *name, ap_out_filter_func filter_func, ap_init_filter_func filter_init, ap_filter_type ftype); /* For httpd-?.? I suggest replacing the above with #define ap_register_output_filter(name,ffunc,init,ftype) \ ap_register_output_filter_protocol(name,ffunc,init,ftype,0) */ /** * This function is used to register an output filter with the system. * After this registration is performed, then a filter may be added * directly to the filter chain by using ap_add_output_filter() and * simply specifying the name, or as a provider under mod_filter. * * @param name The name to attach to the filter function * @param filter_func The filter function to name * @param filter_init The function to call before the filter handlers * are invoked * @param ftype The type of filter function, either ::AP_FTYPE_CONTENT_SET or * ::AP_FTYPE_CONNECTION * @param proto_flags Protocol flags: logical OR of AP_FILTER_PROTO_* bits * @return the filter rec * @see ap_add_output_filter() */ AP_DECLARE(ap_filter_rec_t *) ap_register_output_filter_protocol( const char *name, ap_out_filter_func filter_func, ap_init_filter_func filter_init, ap_filter_type ftype, unsigned int proto_flags); /** * Adds a named filter into the filter chain on the specified request record. * The filter will be installed with the specified context pointer. * * Filters added in this way will always be placed at the end of the filters * that have the same type (thus, the filters have the same order as the * calls to ap_add_filter). If the current filter chain contains filters * from another request, then this filter will be added before those other * filters. * * To re-iterate that last comment. This function is building a FIFO * list of filters. Take note of that when adding your filter to the chain. * * @param name The name of the filter to add * @param ctx Context data to provide to the filter * @param r The request to add this filter for (or NULL if it isn't associated with a request) * @param c The connection to add the fillter for */ AP_DECLARE(ap_filter_t *) ap_add_input_filter(const char *name, void *ctx, request_rec *r, conn_rec *c); /** * Variant of ap_add_input_filter() that accepts a registered filter handle * (as returned by ap_register_input_filter()) rather than a filter name * * @param f The filter handle to add * @param ctx Context data to provide to the filter * @param r The request to add this filter for (or NULL if it isn't associated with a request) * @param c The connection to add the fillter for */ AP_DECLARE(ap_filter_t *) ap_add_input_filter_handle(ap_filter_rec_t *f, void *ctx, request_rec *r, conn_rec *c); /** * Returns the filter handle for use with ap_add_input_filter_handle. * * @param name The filter name to look up */ AP_DECLARE(ap_filter_rec_t *) ap_get_input_filter_handle(const char *name); /** * Add a filter to the current request. Filters are added in a FIFO manner. * The first filter added will be the first filter called. * @param name The name of the filter to add * @param ctx Context data to set in the filter * @param r The request to add this filter for (or NULL if it isn't associated with a request) * @param c The connection to add this filter for * @note If adding a connection-level output filter (i.e. where the type * is >= AP_FTYPE_CONNECTION) during processing of a request, the request * object r must be passed in to ensure the filter chains are modified * correctly. f->r will still be initialized as NULL in the new filter. */ AP_DECLARE(ap_filter_t *) ap_add_output_filter(const char *name, void *ctx, request_rec *r, conn_rec *c); /** * Variant of ap_add_output_filter() that accepts a registered filter handle * (as returned by ap_register_output_filter()) rather than a filter name * * @param f The filter handle to add * @param ctx Context data to set in the filter * @param r The request to add this filter for (or NULL if it isn't associated with a request) * @param c The connection to add the filter for * @note If adding a connection-level output filter (i.e. where the type * is >= AP_FTYPE_CONNECTION) during processing of a request, the request * object r must be passed in to ensure the filter chains are modified * correctly. f->r will still be initialized as NULL in the new filter. */ AP_DECLARE(ap_filter_t *) ap_add_output_filter_handle(ap_filter_rec_t *f, void *ctx, request_rec *r, conn_rec *c); /** * Returns the filter handle for use with ap_add_output_filter_handle. * * @param name The filter name to look up */ AP_DECLARE(ap_filter_rec_t *) ap_get_output_filter_handle(const char *name); /** * Remove an input filter from either the request or connection stack * it is associated with. * @param f The filter to remove */ AP_DECLARE(void) ap_remove_input_filter(ap_filter_t *f); /** * Remove an output filter from either the request or connection stack * it is associated with. * @param f The filter to remove */ AP_DECLARE(void) ap_remove_output_filter(ap_filter_t *f); /** * Remove an input filter from either the request or connection stack * it is associated with. * @param next The filter stack to search * @param handle The filter handle (name) to remove * @return APR_SUCCESS on removal or error */ AP_DECLARE(apr_status_t) ap_remove_input_filter_byhandle(ap_filter_t *next, const char *handle); /** * Remove an output filter from either the request or connection stack * it is associated with. * @param next The filter stack to search * @param handle The filter handle (name) to remove * @return APR_SUCCESS on removal or error */ AP_DECLARE(apr_status_t) ap_remove_output_filter_byhandle(ap_filter_t *next, const char *handle); /* The next two filters are for abstraction purposes only. They could be * done away with, but that would require that we break modules if we ever * want to change our filter registration method. The basic idea, is that * all filters have a place to store data, the ctx pointer. These functions * fill out that pointer with a bucket brigade, and retrieve that data on * the next call. The nice thing about these functions, is that they * automatically concatenate the bucket brigades together for you. This means * that if you have already stored a brigade in the filters ctx pointer, then * when you add more it will be tacked onto the end of that brigade. When * you retrieve data, if you pass in a bucket brigade to the get function, * it will append the current brigade onto the one that you are retrieving. */ /** * prepare a bucket brigade to be setaside. If a different brigade was * set-aside earlier, then the two brigades are concatenated together. * @param f The current filter * @param save_to The brigade that was previously set-aside. Regardless, the * new bucket brigade is returned in this location. * @param b The bucket brigade to save aside. This brigade is always empty * on return * @param p Ensure that all data in the brigade lives as long as this pool */ AP_DECLARE(apr_status_t) ap_save_brigade(ap_filter_t *f, apr_bucket_brigade **save_to, apr_bucket_brigade **b, apr_pool_t *p); /** * Flush function for apr_brigade_* calls. This calls ap_pass_brigade * to flush the brigade if the brigade buffer overflows. * @param bb The brigade to flush * @param ctx The filter to pass the brigade to * @note this function has nothing to do with FLUSH buckets. It is simply * a way to flush content out of a brigade and down a filter stack. */ AP_DECLARE_NONSTD(apr_status_t) ap_filter_flush(apr_bucket_brigade *bb, void *ctx); /** * Flush the current brigade down the filter stack. * @param f The filter we are passing to * @param bb The brigade to flush */ AP_DECLARE(apr_status_t) ap_fflush(ap_filter_t *f, apr_bucket_brigade *bb); /** * Write a buffer for the current filter, buffering if possible. * @param f the filter we are writing to * @param bb The brigade to buffer into * @param data The data to write * @param nbyte The number of bytes in the data */ #define ap_fwrite(f, bb, data, nbyte) \ apr_brigade_write(bb, ap_filter_flush, f, data, nbyte) /** * Write a buffer for the current filter, buffering if possible. * @param f the filter we are writing to * @param bb The brigade to buffer into * @param str The string to write */ #define ap_fputs(f, bb, str) \ apr_brigade_write(bb, ap_filter_flush, f, str, strlen(str)) /** * Write a character for the current filter, buffering if possible. * @param f the filter we are writing to * @param bb The brigade to buffer into * @param c The character to write */ #define ap_fputc(f, bb, c) \ apr_brigade_putc(bb, ap_filter_flush, f, c) /** * Write an unspecified number of strings to the current filter * @param f the filter we are writing to * @param bb The brigade to buffer into * @param ... The strings to write */ AP_DECLARE_NONSTD(apr_status_t) ap_fputstrs(ap_filter_t *f, apr_bucket_brigade *bb, ...) AP_FN_ATTR_SENTINEL; /** * Output data to the filter in printf format * @param f the filter we are writing to * @param bb The brigade to buffer into * @param fmt The format string * @param ... The arguments to use to fill out the format string */ AP_DECLARE_NONSTD(apr_status_t) ap_fprintf(ap_filter_t *f, apr_bucket_brigade *bb, const char *fmt, ...) __attribute__((format(printf,3,4))); /** * set protocol requirements for an output content filter * (only works with AP_FTYPE_RESOURCE and AP_FTYPE_CONTENT_SET) * @param f the filter in question * @param proto_flags Logical OR of AP_FILTER_PROTO_* bits */ AP_DECLARE(void) ap_filter_protocol(ap_filter_t* f, unsigned int proto_flags); /** Filter changes contents (so invalidating checksums/etc) */ #define AP_FILTER_PROTO_CHANGE 0x1 /** Filter changes length of contents (so invalidating content-length/etc) */ #define AP_FILTER_PROTO_CHANGE_LENGTH 0x2 /** Filter requires complete input and can't work on byteranges */ #define AP_FILTER_PROTO_NO_BYTERANGE 0x4 /** Filter should not run in a proxy */ #define AP_FILTER_PROTO_NO_PROXY 0x8 /** Filter makes output non-cacheable */ #define AP_FILTER_PROTO_NO_CACHE 0x10 /** Filter is incompatible with "Cache-Control: no-transform" */ #define AP_FILTER_PROTO_TRANSFORM 0x20 /** * @} */ #ifdef __cplusplus } #endif #endif /* !AP_FILTER_H */