2 Changes with Apache 2.5.0
4 *) mod_rewrite: Add 'RewriteOptions LongURLOptimization' to free memory
5 from each set of unmatched rewrite conditions.
8 *) Allow the argument to <IfFile>, <IfDefine>, <IfSection>, <IfDirective>,
9 and <IfModule> to be quoted. This is primarily for the benefit of
10 <IfFile>. [Eric Covener]
12 *) Introduce request taint checking framework to prevent privilege
13 hijacking through .htaccess. [Nick Kew]
15 *) core: Disallow multiple Listen on the same IP:port when listener buckets
16 are configured (ListenCoresBucketsRatio > 0), consistently with the single
17 bucket case (default), thus avoiding the leak of the corresponding socket
18 descriptors on graceful restart. [Yann Ylavic]
20 *) Add <IfDirective> and <IfSection> directives. [Joe Orton]
22 *) mod_syslog: Support use of optional "tag" in syslog entries.
23 PR 60525. [Ben Rubson <ben.rubson gmail.com>, Jim Jagielski]
25 *) When using mod_status with the Event MPM, report the number of requests
26 associated with an active connection in the "ACC" field. Previously
27 zero was always reported with this MPM. PR60647. [Eric Covener]
29 *) mod_proxy_hcheck: Don't validate timed out responses. [Yann Ylavic]
31 *) mod_remoteip: Add support for PROXY protocol (code donated by Cloudzilla).
32 Add ability for PROXY protocol processing to be optional to donated code.
33 See also: http://www.haproxy.org/download/1.5/doc/proxy-protocol.txt
34 [Cloudzilla/roadrunner2@GitHub, Jim Jagielski, Daniel Ruggeri]
36 *) mod_remoteip: When overriding the useragent address from X-Forwarded-For,
37 zero out what had been initialized as the connection-level port. PR59931.
38 [Hank Ibell <hwibell gmail.com>]
40 *) mod_proxy_wstunnel: Reliably run before mod_proxy_http.
43 *) mod_proxy_protocol: Add server-side, front-end support for PROXY PROTOCOL
44 (http://blog.haproxy.com/haproxy/proxy-protocol/). [roadrunner2]
46 *) http: Allow unknown response status' lines returned in the form of
47 "HTTP/x.x xxx Status xxx". [Yann Ylavic]
49 *) core: Add <IfFile> configuration section to allow any file on disk to be
50 used as a conditional. [Edward Lu, Eric Covener]
52 *) event: Avoid listener periodic wake ups by using the pollset wake-ability
53 when available. PR 57399. [Yann Ylavic, Luca Toscano]
55 *) mod_crypto: Add the all purpose crypto filters with support for HLS.
58 *) core: Drop an invalid Last-Modified header value coming
59 from a FCGI/CGI script instead of replacing it with Unix epoch.
60 Warn the users about Last-Modified header value replacements
61 and violations of the RFC.
62 [Yann Ylavic, Luca Toscano, William Rowe, Jacob Champion]
64 *) mod_dav: Allow other modules to become providers and add ACLs
66 [Jari Urpalainen <jari.urpalainen nokia.com>, Graham Leggett]
68 *) mod_dav: Add dav_begin_multistatus, dav_send_one_response,
69 dav_finish_multistatus, dav_send_multistatus, dav_handle_err,
70 dav_failed_proppatch, dav_success_proppatch to mod_dav.h.
71 [Jari Urpalainen <jari.urpalainen nokia.com>, Graham Leggett]
73 *) mod_proxy, mod_ssl: Handle SSLProxy* directives in <Proxy> sections,
74 allowing per backend TLS configuration. [Yann Ylavic]
76 *) core: explicitly exclude 'h2' from protocols announced via an Upgrade:
77 header as commanded by http-wg. [Stefan Eissing]
79 *) mod_proxy_ajp: Add "secret" parameter to proxy workers to implement legacy
80 AJP13 authentication. PR 53098. [Dmitry A. Bakshaev <dab1818 gmail com>]
82 *) mpm: Generalise the ap_mpm_register_socket functions to accept pipes
83 or sockets. [Graham Leggett]
85 *) core: Extend support for setting aside data from the network input filter
86 to any connection or request input filter. [Graham Leggett]
88 *) core: Split ap_create_request() from ap_read_request(). [Graham Leggett]
90 *) mod_auth_digest: Fix compatibility with expression-based Authname. PR59039.
93 *) mpm: Add a complete_connection hook that confirms whether an MPM is allowed
94 to leave the WRITE_COMPLETION phase. Move filter code out of the MPMs.
97 *) core: Added support for HTTP code 451. PR58985.
98 [Yehuda Katz <yehuda ymkatz.net>, Jim Jagielski]
100 *) mod_filter: Fix AddOutputFilterByType with non-content-level filters.
101 PR58856 [Micha Lenk <micha lenk.info>]
103 *) mod_cache: Consider Cache-Control: s-maxage in expiration
104 calculations. [Eric Covener]
106 *) mod_cache: Allow caching of responses with an Expires header
107 in the past that also has Cache-Control: max-age or s-maxage.
108 PR55156. [Eric Covener]
110 *) Added many log numbers to log statements that had none.
112 *) mod_session: Introduce SessionExpiryUpdateInterval which allows to
113 configure the session/cookie expiry's update interval. PR 57300.
114 [Paul Spangler <paul.spangler ni.com>]
116 *) core: Extend support for asynchronous write completion from the
117 network filter to any connection or request filter. [Graham Leggett]
119 *) mod_auth_digest: remove AuthDigestEnableQueryStringHack which is no
120 more documented since dec 2012 (r1415960). [Christophe Jaillet]
122 *) mod_charset_lite: On EBCDIC platforms, make sure mod_charset_lite runs
123 after other resource-level filters. [Eric Covener]
125 *) http: Don't remove the Content-Length of zero from a HEAD response if
126 it comes from an origin server, module or script. [Yann Ylavic]
128 *) http: Add support for RFC2324/RFC7168. [Graham Leggett]
130 *) mod_rewrite: Add support for starting External Rewriting Programs
131 as non-root user on UNIX systems by specifying username and group name
132 as third argument of RewriteMap directive. [Jan Kaluza]
134 *) mod_authn_core: Add expression support to AuthName and AuthType.
137 *) suexec: Filter out the HTTP_PROXY environment variable because it is
138 treated as alias for http_proxy by some programs. [Stefan Fritsch]
140 *) mod_proxy_http: Don't establish or reuse a backend connection before pre-
141 fetching the request body, so to minimize the delay between it is supposed
142 to be alive and the first bytes sent: this is a best effort to prevent the
143 backend from closing because of idle or keepalive timeout in the meantime.
144 Also, handle a new "proxy-flushall" environment variable which allows to
145 flush any forwarded body data immediately. PR 56541+37920. [Yann Ylavic]
147 *) core: Define and UnDefine are no longer permitted in
148 directory context. Previously they would always be evaulated
149 as the configuration was read without regard for the directory
150 context. [Eric Covener]
152 *) config: For directives that do not expect any arguments, enforce
153 that none are specified in the configuration file.
154 [Joachim Zobel <jzobel heute-morgen.de>, Eric Covener]
156 *) mod_rewrite: Improve 'bad flag delimeters' startup error by showing
157 how the input was tokenized. PR 56528. [Edward Lu <Chaosed0 gmail.com>]
159 *) mod_proxy: Don't put non balancer-member workers in error state by
160 default for connection or 500/503 errors, and honor status=+I for
161 any error. PR 48388. [Yann Ylavic]
163 *) mod_socache_memcache: Pass expiration time through to memcached. PR 55445.
164 [Faidon Liambotis <paravoid debian.org>, Joe Orton]
166 *) ap_expr: Add filemod function for checking file modification dates
169 *) mod_authnz_ldap: Resolve crashes with LDAP authz and non-LDAP authn since
170 r1608202. [Eric Covener]
172 *) apreq: Content-Length header should be always interpreted as a decimal.
173 Leading 0 could be erroneously considered as an octal value. PR 56598.
174 [Chris Card <ctcard hotmail com>]
176 *) mod_proxy: Now allow for 191 character worker names, with non-fatal
177 errors if name is truncated. PR53218. [Jim Jagielski]
179 *) mod_ssl: Add optional function "ssl_get_tls_cb" to allow support
180 for channel bindings. [Simo Sorce <simo redhat.com>]
182 *) mod_proxy_wstunnel: Concurrent websockets messages could be
183 lost or delayed with ProxyWebsocketAsync enabled.
184 [Edward Lu <Chaosed0 gmail.com>]
186 *) core, mod_info: Add compiled and loaded PCRE versions to version
187 number display. [Rainer Jung]
189 *) mod_authnz_ldap: Return LDAP connections to the pool before the handler
190 is run, instead of waiting until the end of the request. [Eric Covener]
192 *) mod_proxy_html: support automatic detection of doctype and processing
193 of FPIs. PR56285 [Micha Lenk <micha lenk info>, Nick Kew]
195 *) mod_proxy_html: skip documents shorter than 4 bytes
196 PR 56286 [Micha Lenk <micha lenk info>]
198 *) mod_proxy_fdpass: Fix computation of the size of 'struct sockaddr_un'
199 when passed to 'connect()'.
200 [Graham Dumpleton <grahamd apache org>]
202 *) core: Add ap_mpm_resume_suspended() API to allow a suspended connection
204 [Artem <artemciy gmail.com>, Edward Lu <Chaosed0 gmail.com>]
206 *) core: Add ap_mpm_register_socket_callback_timeout() API. [Eric Covener]
208 *) mod_proxy_wstunnel: Honor ProxyWebsocketIdleTimeout in asynchronous
209 processing mode. [Eric Covener]
211 *) mod_authnz_ldap: Fail explicitly when the filter is too long. Remove
212 unnecessary apr_pstrdup() and strlen(). [Graham Leggett]
214 *) Add the ldap-search option to mod_authnz_ldap, allowing authorization
215 to be based on arbitrary expressions that do not include the username.
218 *) Add the ldap function to the expression API, allowing LDAP filters and
219 distinguished names based on expressions to be escaped correctly to
220 guard against LDAP injection. [Graham Leggett]
222 *) Add module mod_ssl_ct, which provides an implementation of Certificate
223 Transparency (RFC 6962) for httpd. [Jeff Trawick]
225 *) mod_proxy_wstunnel: Avoid sending error responses down an upgraded
226 websockets connection as it is being close down. [Eric Covener]
228 *) mod_proxy_wstunnel: Allow the administrator to cap the amount
229 of time a synchronous websockets connection stays idle with
230 ProxyWebsocketIdleTimeout. [Eric Covener]
232 *) mod_proxy_wstunnel: Change to opt-in for asynchronous support, adding
233 directives ProxyWebsocketAsync and ProxyWebsocketAsyncDelay.
236 *) mod_proxy_wstunnel: Stop leaking websockets backend connections under
237 event MPM (trunk-only). [Eric Covener]
239 *) mod_proxy_http: Add detach_backend hook (potentially usable
240 in other proxy scheme handlers). [Jeff Trawick]
242 *) mod_deflate: Add DeflateAlterETag to control how the ETag
243 is modified. The 'NoChange' parameter mimics 2.2.x behavior.
244 PR 45023, PR 39727. [Eric Covener]
246 *) mod_rewrite: Add 'BNF' (backreferences-no-plus) flag to RewriteRule to
247 allow spaces in backreferences to be encoded as %20 instead of '+'.
250 *) mod_rewrite: Support an optional list of characters to escape in the
251 argument for the 'B' (escape backreferences) flag. [Eric Covener]
253 *) mod_dir: Default to 2.2-like behavior and skip execution when method is
254 neither GET nor POST, such as for DAV requests. PR 54914. [Chris Darroch]
256 *) mod_rewrite: Rename the handler that does per-directory internal
257 redirects to "rewrite-redirect-handler" from "redirect-handler" so
258 it is less ambiguous and less likely to be reused. [Eric Covener]
260 *) mod_rewrite: Protect against looping with the [N] flag by enforcing a
261 default limit of 10000 iterations, and allowing each rule to change its
262 limit. [Eric Covener]
264 *) mod_ssl: Fix config merging of SSLOCSPEnable and SSLOCSPOverrideResponder.
267 *) Add HttpContentLengthHeadZero and HttpExpectStrict directives.
268 [Yehuda Sadeh <yehuda inktank com>, Justin Erenkrantz]
270 *) mod_ssl: Add -t -DDUMP_CA_CERTS option which dumps the filenames of all
271 configured SSL CA certificates to stdout the same way as DUMP_CERTS does.
274 *) mod_ssl: Don't flush when an EOS is received. Prepares mod_ssl
275 to support write completion. [Graham Leggett]
277 *) core: Add parse_errorlog_arg callback to ap_errorlog_provider
278 to allow providers to check the ErrorLog argument. [Jan Kaluza]
280 *) mod_cgid: Use the servers Timeout for each read from a CGI script,
281 allow override with new CGIDRequestTimeout directive. PR43494
282 [Eric Covener, Toshikuni Fukaya <toshikuni-fukaya cybozu co jp>]
284 *) core: ensure any abnormal exit is reported to stderr if it's a tty.
287 *) mod_lua: Let the Inter-VM get/set functions work with a global
288 shared memory pool instead of a per-process pool. [Daniel Gruno]
290 *) ldap: Support ldaps when using the Microsoft LDAP SDK.
291 PR 54626. [Jean-Frederic Clere]
293 *) mod_authnz_ldap: Change default value of AuthLDAPMaxSubGroupDepth to 0
294 to avoid performance problems when subgroups aren't in use. [Eric Covener]
296 *) mod_syslog: New module implementing syslog ap_error_log provider.
297 Previously, this code was part of core, now it's in separate module.
300 *) core: Add ap_errorlog_provider to make ErrorLog logging modular. Move
301 syslog support from core to new mod_syslog. [Jan Kaluza]
303 *) mod_status, mod_echo: Fix the display of client addresses.
304 They were truncated to 31 characters which is not enough for IPv6 addresses.
305 PR 54848 [Bernhard Schmidt <berni birkenwald de>]
307 *) mod_unique_id: Use output of the PRNG rather than IP address and
308 pid, avoiding sleep() call and possible DNS issues at startup,
309 plus improving randomness for IPv6-only hosts.
310 [Jan Kaluza <jkaluza redhat.com>]
312 *) mod_file_cache: mod_file_cache should be able to serve files that
313 haven't had a Content-Type set via e.g. mod_mime. [Eric Covener]
315 *) core: merge AllowEncodedSlashes from the base configuration into
316 virtual hosts. [Eric Covener]
318 *) AIX: Install DSO's with "cp" instead of "install" in instdso.sh
321 *) mod_ldap: Don't keep retrying if a new LDAP connection times out.
324 *) mod_deflate: permit compilation of mod_deflate against a zlib that has
325 been configured with -D Z_PREFIX, which redefines the token "deflate".
328 *) mod_auth_digest: Use the secret when generating nonces in all cases and
329 not only when AuthName is used in .htaccess files (this change may cause
330 problems if used with round robin load balancers). Don't regenerate the
331 secret on graceful restarts. PR 54637 [Stefan Fritsch]
333 *) core: Remove apr_brigade_flatten(), buffering and duplicated code
334 from the HTTP_IN filter, parse chunks in a single pass with zero copy.
335 Reduce memory usage by 48 bytes per request. [Graham Leggett]
337 *) core: Stop the HTTP_IN filter from attempting to write error buckets
338 to the output filters, which is bogus in the proxy case. Create a
339 clean mapping from APR codes to HTTP status codes, and use it where
340 needed. [Graham Leggett]
342 *) mod_proxy: Ensure network errors detected by the proxy are returned as
343 504 Gateway Timout as opposed to 502 Bad Gateway, in order to be
344 compliant with RFC2616 14.9.4 Cache Revalidation and Reload Controls.
346 *) mod_dav: mod_dav overrides dav_fs response on PUT failure. PR 35981
347 [Basant Kumar Kukreja <basant.kukreja sun.com>, Alejandro Alvarez
348 <alejandro.alvarez.ayllon cern.ch>]
350 *) mod_ldap: LDAP connections used for authentication were not respecting
351 LDAPConnectionPoolTimeout. PR 54587
353 *) core: ap_rgetline_core now pulls from r->proto_input_filters.
355 *) mod_proxy_html: process parsed comments immediately.
356 Fixes bug where parsed comments may be lost. [Nick Kew]
358 *) mod_proxy_html: introduce doctype for HTML 5 [Nick Kew]
360 *) mod_proxy_html: fix typo-bug processing "strict" vs "transitional"
361 HTML/XHTML [Nick Kew]
363 *) core: Add option to add valgrind support. Use it to reduce false positive
364 warnings in mod_ssl. [Stefan Fritsch]
366 *) mod_authn_file, mod_authn_dbd, mod_authn_dbm, mod_authn_socache:
367 Cache the result of the most recent password hash verification for every
368 keep-alive connection. This saves some expensive calculations.
371 *) http: Remove support for Request-Range header sent by Navigator 2-3 and
372 MSIE 3. [Stefan Fritsch]
374 *) core, http: Extend HttpProtocol with an option to enforce stricter HTTP
375 conformance or to only log the found problems. [Stefan Fritsch]
377 *) core: Correctly parse an IPv6 literal host specification in an absolute
378 URL in the request line. [Stefan Fritsch]
382 *) core: Add LogLevelOverride directive that allows to override the
383 loglevel for clients from certain IPs. This also works for things
384 like the SSL handshake where <If> LogLevel ... </If> is evaluated
385 too late. [Stefan Fritsch]
387 *) core: Add new directive Warning to issue warnings from a configuration
388 file. Both Warning and Error now generate a timestamped log message.
391 *) ap_expr: Add SERVER_PROTOCOL_VERSION, ..._MAJOR, and ..._MINOR
392 variables. [Stefan Fritsch]
394 *) core: New directive RegisterHttpMethod for registering non-standard
395 HTTP methods. [Stefan Fritsch]
397 *) core: New directive HttpProtocol which allows to disable HTTP/0.9
398 support. [Stefan Fritsch]
400 *) mod_allowhandlers: New module to forbid specific handlers for specific
401 directories. [Stefan Fritsch]
403 *) mod_systemd: New module, for integration with systemd on Linux.
404 [Jan Kaluza <jkaluza redhat.com>]
406 *) WinNT MPM: Store pid and generation for each thread in scoreboard
407 to allow tracking of threads from exiting children via mod_status
408 or other such mechanisms. [Jeff Trawick]
410 *) The following now respect DefaultRuntimeDir/DEFAULT_REL_RUNTIMEDIR:
411 - APIs: ap_log_pid(), ap_remove_pid, ap_read_pid()
412 - mod_cache: thundering herd lock directory
413 - mod_lbmethod_heartbeat, mod_heartmonitor: heartbeat storage file
414 - mod_ldap: shared memory cache
415 - mod_socache_shmcb, mod_socache_dbm: shared memory or dbm for cache
418 *) suexec: Add --enable-suexec-capabilites support on Linux, to use
419 setuid/setgid capability bits rather than a setuid root binary.
422 *) suexec: Add support for logging to syslog as an alternative to logging
423 to a file; configure --without-suexec-logfile --with-suexec-syslog.
426 *) mod_ssl: Add support for TLS Next Protocol Negotiation. PR 52210.
427 [Matthew Steele <mdsteele google.com>]
429 *) cross-compile: allow to provide CC_FOR_BUILD so that gen_test_char will
430 be compiled by the build compiler instead of the host compiler.
431 Also set CC_FOR_BUILD to 'cc' when cross-compilation is detected.
432 PR 51257. [Guenter Knauf]
434 *) core: In maintainer mode, replace apr_palloc with a version that
435 initializes the allocated memory with non-zero values, except if
436 AP_DEBUG_NO_ALLOC_POISON is defined. [Stefan Fritsch]
438 *) mod_policy: Add a new testing module to help server administrators
439 enforce a configurable level of protocol compliance on their
440 servers and application servers behind theirs. [Graham Leggett]
442 *) mod_firehose: Add a new debugging module able to record traffic
443 passing through the server in such a way that connections and/or
444 requests be reconstructed and replayed. [Graham Leggett]
454 [Apache 2.5.0-dev includes those bug fixes and changes with the
455 Apache 2.4.xx tree as documented below, except as noted.]
457 Changes with Apache 2.4.x and later:
459 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/CHANGES?view=markup
461 Changes with Apache 2.2.x and later:
463 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.2.x/CHANGES?view=markup
465 Changes with Apache 2.0.x and later:
467 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.0.x/CHANGES?view=markup