2 Changes with Apache 2.5.0
4 *) mod_ssl: Add SSLOCSPProxyURL to add the possibility to do all queries
5 to OCSP responders through a HTTP proxy. [Ruediger Pluem]
7 *) mod_http2: idle connections are returned to async mpms. new hook
8 "pre_close_connection" used to send GOAWAY frame when not already done.
9 Setting event mpm server config "by hand" for the main connection to
10 the correct negotiated server.
13 *) core: new hook "pre_close_connection" which is run before the lingering
14 close of connections is started. This gives protocol handlers one last
15 chance to use a connection before it goes down.
18 *) mod_filter: Fix AddOutputFilterByType with non-content-level filters.
19 PR58856 [Micha Lenk <micha lenk.info>]
21 *) mod_cache: Consider Cache-Control: s-maxage in expiration
22 calculations. [Eric Covener]
24 *) mod_cache: Allow caching of responses with an Expires header
25 in the past that also has Cache-Control: max-age or s-maxage.
26 PR55156. [Eric Covener]
28 *) ap_expr: expression support for variable HTTP2=on|off
31 *) mod_status/scoreboard: showing connection protocol in new column, new
32 ap_update_child_status methods for updating server/description. mod_ssl
33 sets vhost negotiated by servername directly.
36 *) mod_http2: keep-alive blocking reads are done with 1 second timeouts to
37 check for MPM stopping. Will announce early GOAWAY and finish processing
38 open streams, then close.
41 *) mod_proxy_hcheck: Provide for dynamic background health
42 checks on reverse proxies associated with BalancerMember
43 workers. [Jim Jagielski]
45 *) mod_ssl: handle TIMEOUT on empty SSL input as non-fatal, returning
46 APR_TIMEUP and preserving connection state for later retry.
49 *) mod_http2: bytes read/written on slave connections are reported via the
50 optional mod_logio functions. Fixes PR 58871.
52 *) Added many log numbers to log statements that had none.
54 *) core: Add expression support to SetHandler.
57 *) mod_proxy_fcgi: Suppress HTTP error 503 and message 01075,
58 "Error dispatching request", when the cause appears to be
59 due to the client closing the connection.
60 PR58118. [Tobias Adolph <adolph lrz.de>]
62 *) mod_cgid: Message 02550, failure to flush a response to the client,
63 is now logged at TRACE1 level to match the underlying core output filter
64 severity. [Eric Covener]
66 *) mod_rewrite: Avoid looping on relative substitutions that
67 result in the same filename we started with. PR 58854.
70 *) mime.types: add common extension "m4a" for MPEG 4 Audio.
71 PR 57895 [Dylan Millikin <dylan.millikin gmail.com>]
73 *) mod_ssl: Save some TLS record (application data) fragmentations by
74 including the last and subsequent suitable buckets when coalescing.
77 *) mod_cache_socache: Fix a possible cached entity body corruption when it
78 is received from an origin server in multiple batches and forwarded by
79 mod_proxy. [Yann Ylavic]
81 *) mod_proxy_fdpass: Fix AH01153 error when using the default configuration.
82 In earlier version of httpd, you can explicitelly set the 'flusher' parameter
83 to 'flush' as a workaround. (i.e. flusher=flush)
84 Add documentation for the 'flusher' parameter when defining a proxy worker.
87 *) mod_ssl: For the "SSLStaplingReturnResponderErrors off" case, make sure
88 to only staple responses with certificate status "good". [Kaspar Brand]
90 *) core: Limit to ten the number of tolerated empty lines between request,
91 and consume them before the pipelining check to avoid possible response
92 delay when reading the next request without flushing. [Yann Ylavic]
94 *) mod_session: Introduce SessionExpiryUpdateInterval which allows to
95 configure the session/cookie expiry's update interval. PR 57300.
96 [Paul Spangler <paul.spangler ni.com>]
98 *) core: Extend support for asynchronous write completion from the
99 network filter to any connection or request filter. [Graham Leggett]
101 *) mpm_event: Free memory earlier when shutting down processes.
104 *) mod_ssl: Make the output filter more friendly with deferred write and
105 response pipelining. [Yann Ylavic, Joe Orton]
107 *) core/util_script: relax alphanumeric filter of environment variable names
108 on Windows to allow '(' and ')' for passing PROGRAMFILES(X86) et.al.
109 unadulterated in 64 bit versions of Windows. PR 46751.
110 [John <john leineweb de>]
112 *) mod_auth_digest: remove AuthDigestEnableQueryStringHack which is no
113 more documented since dec 2012 (r1415960). [Christophe Jaillet]
115 *) mod_charset_lite: On EBCDIC platforms, make sure mod_charset_lite runs
116 after other resource-level filters. [Eric Covener]
118 *) mod_dir: Responses that go through "FallbackResource" might appear to
119 hang due to unterminated chunked encoding. PR58292. [Eric Covener]
121 *) mod_alias: Limit Redirect expressions to directory (Location) context
122 and redirect statuses (implicit or explicit).
123 [Yann Ylavic, Ruediger Pluem]
125 *) mod_substitute: Fix configuraton merge order.
126 PR 57641 [<Marc.Stern approach.be>]
128 *) mod_ssl: When SSLVerify is disabled (NONE), don't force a renegotiation if
129 the SSLVerifyDepth applied with the default/handshaken vhost differs from
130 the one applicable with the finally selected vhost. [Yann Ylavic]
132 *) http: Don't remove the Content-Length of zero from a HEAD response if
133 it comes from an origin server, module or script. [Yann Ylavic]
135 *) http: Add support for RFC2324/RFC7168. [Graham Leggett]
137 *) mod_rewrite: Add support for starting External Rewriting Programs
138 as non-root user on UNIX systems by specifying username and group name
139 as third argument of RewriteMap directive. [Jan Kaluza]
141 *) mod_authn_core: Add expression support to AuthName and AuthType.
144 *) suexec: Filter out the HTTP_PROXY environment variable because it is
145 treated as alias for http_proxy by some programs. [Stefan Fritsch]
147 *) mod_proxy_http: Don't establish or reuse a backend connection before pre-
148 fetching the request body, so to minimize the delay between it is supposed
149 to be alive and the first bytes sent: this is a best effort to prevent the
150 backend from closing because of idle or keepalive timeout in the meantime.
151 Also, handle a new "proxy-flushall" environment variable which allows to
152 flush any forwarded body data immediately. PR 56541+37920. [Yann Ylavic]
154 *) core: Define and UnDefine are no longer permitted in
155 directory context. Previously they would always be evaulated
156 as the configuration was read without regard for the directory
157 context. [Eric Covener]
159 *) config: For directives that do not expect any arguments, enforce
160 that none are specified in the configuration file.
161 [Joachim Zobel <jzobel heute-morgen.de>, Eric Covener]
163 *) mod_rewrite: Improve 'bad flag delimeters' startup error by showing
164 how the input was tokenized. PR 56528. [Edward Lu <Chaosed0 gmail.com>]
166 *) mod_proxy: Don't put non balancer-member workers in error state by
167 default for connection or 500/503 errors, and honor status=+I for
168 any error. PR 48388. [Yann Ylavic]
170 *) mod_socache_memcache: Pass expiration time through to memcached. PR 55445.
171 [Faidon Liambotis <paravoid debian.org>, Joe Orton]
173 *) ap_expr: Add filemod function for checking file modification dates
176 *) mod_authnz_ldap: Resolve crashes with LDAP authz and non-LDAP authn since
177 r1608202. [Eric Covener]
179 *) core: Ensure that httpd exits with an error status when the MPM fails
180 to run. [Yann Ylavic]
182 *) apreq: Content-Length header should be always interpreted as a decimal.
183 Leading 0 could be erroneously considered as an octal value. PR 56598.
184 [Chris Card <ctcard hotmail com>]
186 *) mod_proxy: Now allow for 191 character worker names, with non-fatal
187 errors if name is truncated. PR53218. [Jim Jagielski]
189 *) mod_ssl: Add optional function "ssl_get_tls_cb" to allow support
190 for channel bindings. [Simo Sorce <simo redhat.com>]
192 *) mod_proxy_wstunnel: Concurrent websockets messages could be
193 lost or delayed with ProxyWebsocketAsync enabled.
194 [Edward Lu <Chaosed0 gmail.com>]
196 *) core, mod_info: Add compiled and loaded PCRE versions to version
197 number display. [Rainer Jung]
199 *) mod_authnz_ldap: Return LDAP connections to the pool before the handler
200 is run, instead of waiting until the end of the request. [Eric Covener]
202 *) mod_log_config: Add GlobalLog to allow a globally defined log to
203 be inherited by virtual hosts that define a CustomLog.
204 [Edward Lu <Chaosed0 gmail.com>]
206 *) mod_proxy_html: support automatic detection of doctype and processing
207 of FPIs. PR56285 [Micha Lenk <micha lenk info>, Nick Kew]
209 *) mod_proxy_html: skip documents shorter than 4 bytes
210 PR 56286 [Micha Lenk <micha lenk info>]
212 *) mod_proxy_fdpass: Fix computation of the size of 'struct sockaddr_un'
213 when passed to 'connect()'.
214 [Graham Dumpleton <grahamd apache org>]
216 *) core: Add ap_mpm_resume_suspended() API to allow a suspended connection
218 [Artem <artemciy gmail.com>, Edward Lu <Chaosed0 gmail.com>]
220 *) core: Add ap_mpm_register_socket_callback_timeout() API. [Eric Covener]
222 *) mod_proxy_wstunnel: Honor ProxyWebsocketIdleTimeout in asynchronous
223 processing mode. [Eric Covener]
225 *) mod_authnz_ldap: Fail explicitly when the filter is too long. Remove
226 unnecessary apr_pstrdup() and strlen(). [Graham Leggett]
228 *) Add the ldap-search option to mod_authnz_ldap, allowing authorization
229 to be based on arbitrary expressions that do not include the username.
232 *) Add the ldap function to the expression API, allowing LDAP filters and
233 distinguished names based on expressions to be escaped correctly to
234 guard against LDAP injection. [Graham Leggett]
236 *) Add module mod_ssl_ct, which provides an implementation of Certificate
237 Transparency (RFC 6962) for httpd. [Jeff Trawick]
239 *) mod_remoteip: Prevent an external proxy from presenting an internal
240 proxy. PR 55962. [Mike Rumph]
242 *) mod_ssl: Add hooks to allow other modules to perform processing at
243 several stages of initialization and connection handling. See
244 mod_ssl_openssl.h. [Jeff Trawick]
246 *) mod_proxy_wstunnel: Avoid sending error responses down an upgraded
247 websockets connection as it is being close down. [Eric Covener]
249 *) mod_proxy_wstunnel: Allow the administrator to cap the amount
250 of time a synchronous websockets connection stays idle with
251 ProxyWebsocketIdleTimeout. [Eric Covener]
253 *) mod_proxy_wstunnel: Change to opt-in for asynchronous support, adding
254 directives ProxyWebsocketAsync and ProxyWebsocketAsyncDelay.
257 *) mod_proxy_wstunnel: Stop leaking websockets backend connections under
258 event MPM (trunk-only). [Eric Covener]
260 *) mod_proxy_http: Add detach_backend hook (potentially usable
261 in other proxy scheme handlers). [Jeff Trawick]
263 *) mod_deflate: Add DeflateAlterETag to control how the ETag
264 is modified. The 'NoChange' parameter mimics 2.2.x behavior.
265 PR 45023, PR 39727. [Eric Covener]
267 *) mod_rewrite: Add 'BNF' (backreferences-no-plus) flag to RewriteRule to
268 allow spaces in backreferences to be encoded as %20 instead of '+'.
271 *) mod_rewrite: Support an optional list of characters to escape in the
272 argument for the 'B' (escape backreferences) flag. [Eric Covener]
274 *) mod_dir: Default to 2.2-like behavior and skip execution when method is
275 neither GET nor POST, such as for DAV requests. PR 54914. [Chris Darroch]
277 *) mod_rewrite: Rename the handler that does per-directory internal
278 redirects to "rewrite-redirect-handler" from "redirect-handler" so
279 it is less ambiguous and less likely to be reused. [Eric Covener]
281 *) mod_rewrite: Protect against looping with the [N] flag by enforcing a
282 default limit of 10000 iterations, and allowing each rule to change its
283 limit. [Eric Covener]
285 *) mod_ssl: Fix config merging of SSLOCSPEnable and SSLOCSPOverrideResponder.
288 *) Add HttpContentLengthHeadZero and HttpExpectStrict directives.
289 [Yehuda Sadeh <yehuda inktank com>, Justin Erenkrantz]
291 *) mod_ssl: Add -t -DDUMP_CA_CERTS option which dumps the filenames of all
292 configured SSL CA certificates to stdout the same way as DUMP_CERTS does.
295 *) mod_ssl: Don't flush when an EOS is received. Prepares mod_ssl
296 to support write completion. [Graham Leggett]
298 *) core: Add parse_errorlog_arg callback to ap_errorlog_provider
299 to allow providers to check the ErrorLog argument. [Jan Kaluza]
301 *) mod_cgid: Use the servers Timeout for each read from a CGI script,
302 allow override with new CGIDRequestTimeout directive. PR43494
303 [Eric Covener, Toshikuni Fukaya <toshikuni-fukaya cybozu co jp>]
305 *) core: ensure any abnormal exit is reported to stderr if it's a tty.
308 *) mod_lua: Let the Inter-VM get/set functions work with a global
309 shared memory pool instead of a per-process pool. [Daniel Gruno]
311 *) ldap: Support ldaps when using the Microsoft LDAP SDK.
312 PR 54626. [Jean-Frederic Clere]
314 *) mod_authnz_ldap: Change default value of AuthLDAPMaxSubGroupDepth to 0
315 to avoid performance problems when subgroups aren't in use. [Eric Covener]
317 *) mod_syslog: New module implementing syslog ap_error_log provider.
318 Previously, this code was part of core, now it's in separate module.
321 *) core: Add ap_errorlog_provider to make ErrorLog logging modular. Move
322 syslog support from core to new mod_syslog. [Jan Kaluza]
324 *) mod_status, mod_echo: Fix the display of client addresses.
325 They were truncated to 31 characters which is not enough for IPv6 addresses.
326 PR 54848 [Bernhard Schmidt <berni birkenwald de>]
328 *) mod_unique_id: Use output of the PRNG rather than IP address and
329 pid, avoiding sleep() call and possible DNS issues at startup,
330 plus improving randomness for IPv6-only hosts.
331 [Jan Kaluza <jkaluza redhat.com>]
333 *) mod_file_cache: mod_file_cache should be able to serve files that
334 haven't had a Content-Type set via e.g. mod_mime. [Eric Covener]
336 *) core: merge AllowEncodedSlashes from the base configuration into
337 virtual hosts. [Eric Covener]
339 *) AIX: Install DSO's with "cp" instead of "install" in instdso.sh
342 *) mod_ldap: Don't keep retrying if a new LDAP connection times out.
345 *) mod_deflate: permit compilation of mod_deflate against a zlib that has
346 been configured with -D Z_PREFIX, which redefines the token "deflate".
349 *) mod_auth_digest: Use the secret when generating nonces in all cases and
350 not only when AuthName is used in .htaccess files (this change may cause
351 problems if used with round robin load balancers). Don't regenerate the
352 secret on graceful restarts. PR 54637 [Stefan Fritsch]
354 *) core: Remove apr_brigade_flatten(), buffering and duplicated code
355 from the HTTP_IN filter, parse chunks in a single pass with zero copy.
356 Reduce memory usage by 48 bytes per request. [Graham Leggett]
358 *) core: Stop the HTTP_IN filter from attempting to write error buckets
359 to the output filters, which is bogus in the proxy case. Create a
360 clean mapping from APR codes to HTTP status codes, and use it where
361 needed. [Graham Leggett]
363 *) mod_proxy: Ensure network errors detected by the proxy are returned as
364 504 Gateway Timout as opposed to 502 Bad Gateway, in order to be
365 compliant with RFC2616 14.9.4 Cache Revalidation and Reload Controls.
367 *) mod_dav: mod_dav overrides dav_fs response on PUT failure. PR 35981
368 [Basant Kumar Kukreja <basant.kukreja sun.com>, Alejandro Alvarez
369 <alejandro.alvarez.ayllon cern.ch>]
371 *) mod_ldap: LDAP connections used for authentication were not respecting
372 LDAPConnectionPoolTimeout. PR 54587
374 *) core: ap_rgetline_core now pulls from r->proto_input_filters.
376 *) mod_proxy_html: process parsed comments immediately.
377 Fixes bug where parsed comments may be lost. [Nick Kew]
379 *) mod_proxy_html: introduce doctype for HTML 5 [Nick Kew]
381 *) mod_proxy_html: fix typo-bug processing "strict" vs "transitional"
382 HTML/XHTML [Nick Kew]
384 *) core: Add option to add valgrind support. Use it to reduce false positive
385 warnings in mod_ssl. [Stefan Fritsch]
387 *) mod_authn_file, mod_authn_dbd, mod_authn_dbm, mod_authn_socache:
388 Cache the result of the most recent password hash verification for every
389 keep-alive connection. This saves some expensive calculations.
392 *) http: Remove support for Request-Range header sent by Navigator 2-3 and
393 MSIE 3. [Stefan Fritsch]
395 *) core, http: Extend HttpProtocol with an option to enforce stricter HTTP
396 conformance or to only log the found problems. [Stefan Fritsch]
398 *) core: Correctly parse an IPv6 literal host specification in an absolute
399 URL in the request line. [Stefan Fritsch]
403 *) core: Add LogLevelOverride directive that allows to override the
404 loglevel for clients from certain IPs. This also works for things
405 like the SSL handshake where <If> LogLevel ... </If> is evaluated
406 too late. [Stefan Fritsch]
408 *) core: Add new directive Warning to issue warnings from a configuration
409 file. Both Warning and Error now generate a timestamped log message.
412 *) ap_expr: Add SERVER_PROTOCOL_VERSION, ..._MAJOR, and ..._MINOR
413 variables. [Stefan Fritsch]
415 *) core: New directive RegisterHttpMethod for registering non-standard
416 HTTP methods. [Stefan Fritsch]
418 *) core: New directive HttpProtocol which allows to disable HTTP/0.9
419 support. [Stefan Fritsch]
421 *) mod_allowhandlers: New module to forbid specific handlers for specific
422 directories. [Stefan Fritsch]
424 *) mod_systemd: New module, for integration with systemd on Linux.
425 [Jan Kaluza <jkaluza redhat.com>]
427 *) WinNT MPM: Store pid and generation for each thread in scoreboard
428 to allow tracking of threads from exiting children via mod_status
429 or other such mechanisms. [Jeff Trawick]
431 *) The following now respect DefaultRuntimeDir/DEFAULT_REL_RUNTIMEDIR:
432 - APIs: ap_log_pid(), ap_remove_pid, ap_read_pid()
433 - mod_cache: thundering herd lock directory
434 - mod_lbmethod_heartbeat, mod_heartmonitor: heartbeat storage file
435 - mod_ldap: shared memory cache
436 - mod_socache_shmcb, mod_socache_dbm: shared memory or dbm for cache
439 *) suexec: Add --enable-suexec-capabilites support on Linux, to use
440 setuid/setgid capability bits rather than a setuid root binary.
443 *) suexec: Add support for logging to syslog as an alternative to logging
444 to a file; configure --without-suexec-logfile --with-suexec-syslog.
447 *) mod_ssl: Add support for TLS Next Protocol Negotiation. PR 52210.
448 [Matthew Steele <mdsteele google.com>]
450 *) cross-compile: allow to provide CC_FOR_BUILD so that gen_test_char will
451 be compiled by the build compiler instead of the host compiler.
452 Also set CC_FOR_BUILD to 'cc' when cross-compilation is detected.
453 PR 51257. [Guenter Knauf]
455 *) core: In maintainer mode, replace apr_palloc with a version that
456 initializes the allocated memory with non-zero values, except if
457 AP_DEBUG_NO_ALLOC_POISON is defined. [Stefan Fritsch]
459 *) mod_policy: Add a new testing module to help server administrators
460 enforce a configurable level of protocol compliance on their
461 servers and application servers behind theirs. [Graham Leggett]
463 *) mod_firehose: Add a new debugging module able to record traffic
464 passing through the server in such a way that connections and/or
465 requests be reconstructed and replayed. [Graham Leggett]
475 [Apache 2.5.0-dev includes those bug fixes and changes with the
476 Apache 2.4.xx tree as documented below, except as noted.]
478 Changes with Apache 2.4.x and later:
480 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/CHANGES?view=markup
482 Changes with Apache 2.2.x and later:
484 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.2.x/CHANGES?view=markup
486 Changes with Apache 2.0.x and later:
488 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.0.x/CHANGES?view=markup