2 Changes with Apache 2.5.0
4 *) event: use pre_connection hook to properly initialize connection state for
5 slave connections. use protocol_switch hook to initialize server config
6 early based on SNI selected vhost.
9 *) mod_http2: allowing link header to specify multiple "rel" values,
10 space-separated inside a quoted string. Prohibiting push when Link parameter
14 *) core: Prevent a server crash in case of an invalid CONNECT request with
15 a custom error page for status code 400 that uses server side includes.
16 PR 58929 [Ruediger Pluem]
18 *) mod_ssl: Add SSLOCSPProxyURL to add the possibility to do all queries
19 to OCSP responders through a HTTP proxy. [Ruediger Pluem]
21 *) mod_http2: idle connections are returned to async mpms. new hook
22 "pre_close_connection" used to send GOAWAY frame when not already done.
23 Setting event mpm server config "by hand" for the main connection to
24 the correct negotiated server.
27 *) core: new hook "pre_close_connection" which is run before the lingering
28 close of connections is started. This gives protocol handlers one last
29 chance to use a connection before it goes down.
32 *) mod_filter: Fix AddOutputFilterByType with non-content-level filters.
33 PR58856 [Micha Lenk <micha lenk.info>]
35 *) mod_cache: Consider Cache-Control: s-maxage in expiration
36 calculations. [Eric Covener]
38 *) mod_cache: Allow caching of responses with an Expires header
39 in the past that also has Cache-Control: max-age or s-maxage.
40 PR55156. [Eric Covener]
42 *) ap_expr: expression support for variable HTTP2=on|off
45 *) mod_status/scoreboard: showing connection protocol in new column, new
46 ap_update_child_status methods for updating server/description. mod_ssl
47 sets vhost negotiated by servername directly.
50 *) mod_http2: keep-alive blocking reads are done with 1 second timeouts to
51 check for MPM stopping. Will announce early GOAWAY and finish processing
52 open streams, then close.
55 *) mod_proxy_hcheck: Provide for dynamic background health
56 checks on reverse proxies associated with BalancerMember
57 workers. [Jim Jagielski]
59 *) mod_ssl: handle TIMEOUT on empty SSL input as non-fatal, returning
60 APR_TIMEUP and preserving connection state for later retry.
63 *) mod_http2: bytes read/written on slave connections are reported via the
64 optional mod_logio functions. Fixes PR 58871.
66 *) Added many log numbers to log statements that had none.
68 *) core: Add expression support to SetHandler.
71 *) mod_proxy_fcgi: Suppress HTTP error 503 and message 01075,
72 "Error dispatching request", when the cause appears to be
73 due to the client closing the connection.
74 PR58118. [Tobias Adolph <adolph lrz.de>]
76 *) mod_cgid: Message 02550, failure to flush a response to the client,
77 is now logged at TRACE1 level to match the underlying core output filter
78 severity. [Eric Covener]
80 *) mod_rewrite: Avoid looping on relative substitutions that
81 result in the same filename we started with. PR 58854.
84 *) mime.types: add common extension "m4a" for MPEG 4 Audio.
85 PR 57895 [Dylan Millikin <dylan.millikin gmail.com>]
87 *) mod_ssl: Save some TLS record (application data) fragmentations by
88 including the last and subsequent suitable buckets when coalescing.
91 *) mod_cache_socache: Fix a possible cached entity body corruption when it
92 is received from an origin server in multiple batches and forwarded by
93 mod_proxy. [Yann Ylavic]
95 *) mod_proxy_fdpass: Fix AH01153 error when using the default configuration.
96 In earlier version of httpd, you can explicitelly set the 'flusher' parameter
97 to 'flush' as a workaround. (i.e. flusher=flush)
98 Add documentation for the 'flusher' parameter when defining a proxy worker.
101 *) mod_ssl: For the "SSLStaplingReturnResponderErrors off" case, make sure
102 to only staple responses with certificate status "good". [Kaspar Brand]
104 *) core: Limit to ten the number of tolerated empty lines between request,
105 and consume them before the pipelining check to avoid possible response
106 delay when reading the next request without flushing. [Yann Ylavic]
108 *) mod_session: Introduce SessionExpiryUpdateInterval which allows to
109 configure the session/cookie expiry's update interval. PR 57300.
110 [Paul Spangler <paul.spangler ni.com>]
112 *) core: Extend support for asynchronous write completion from the
113 network filter to any connection or request filter. [Graham Leggett]
115 *) mpm_event: Free memory earlier when shutting down processes.
118 *) mod_ssl: Make the output filter more friendly with deferred write and
119 response pipelining. [Yann Ylavic, Joe Orton]
121 *) core/util_script: relax alphanumeric filter of environment variable names
122 on Windows to allow '(' and ')' for passing PROGRAMFILES(X86) et.al.
123 unadulterated in 64 bit versions of Windows. PR 46751.
124 [John <john leineweb de>]
126 *) mod_auth_digest: remove AuthDigestEnableQueryStringHack which is no
127 more documented since dec 2012 (r1415960). [Christophe Jaillet]
129 *) mod_charset_lite: On EBCDIC platforms, make sure mod_charset_lite runs
130 after other resource-level filters. [Eric Covener]
132 *) mod_dir: Responses that go through "FallbackResource" might appear to
133 hang due to unterminated chunked encoding. PR58292. [Eric Covener]
135 *) mod_alias: Limit Redirect expressions to directory (Location) context
136 and redirect statuses (implicit or explicit).
137 [Yann Ylavic, Ruediger Pluem]
139 *) mod_substitute: Fix configuraton merge order.
140 PR 57641 [<Marc.Stern approach.be>]
142 *) mod_ssl: When SSLVerify is disabled (NONE), don't force a renegotiation if
143 the SSLVerifyDepth applied with the default/handshaken vhost differs from
144 the one applicable with the finally selected vhost. [Yann Ylavic]
146 *) http: Don't remove the Content-Length of zero from a HEAD response if
147 it comes from an origin server, module or script. [Yann Ylavic]
149 *) http: Add support for RFC2324/RFC7168. [Graham Leggett]
151 *) mod_rewrite: Add support for starting External Rewriting Programs
152 as non-root user on UNIX systems by specifying username and group name
153 as third argument of RewriteMap directive. [Jan Kaluza]
155 *) mod_authn_core: Add expression support to AuthName and AuthType.
158 *) suexec: Filter out the HTTP_PROXY environment variable because it is
159 treated as alias for http_proxy by some programs. [Stefan Fritsch]
161 *) mod_proxy_http: Don't establish or reuse a backend connection before pre-
162 fetching the request body, so to minimize the delay between it is supposed
163 to be alive and the first bytes sent: this is a best effort to prevent the
164 backend from closing because of idle or keepalive timeout in the meantime.
165 Also, handle a new "proxy-flushall" environment variable which allows to
166 flush any forwarded body data immediately. PR 56541+37920. [Yann Ylavic]
168 *) core: Define and UnDefine are no longer permitted in
169 directory context. Previously they would always be evaulated
170 as the configuration was read without regard for the directory
171 context. [Eric Covener]
173 *) config: For directives that do not expect any arguments, enforce
174 that none are specified in the configuration file.
175 [Joachim Zobel <jzobel heute-morgen.de>, Eric Covener]
177 *) mod_rewrite: Improve 'bad flag delimeters' startup error by showing
178 how the input was tokenized. PR 56528. [Edward Lu <Chaosed0 gmail.com>]
180 *) mod_proxy: Don't put non balancer-member workers in error state by
181 default for connection or 500/503 errors, and honor status=+I for
182 any error. PR 48388. [Yann Ylavic]
184 *) mod_socache_memcache: Pass expiration time through to memcached. PR 55445.
185 [Faidon Liambotis <paravoid debian.org>, Joe Orton]
187 *) ap_expr: Add filemod function for checking file modification dates
190 *) mod_authnz_ldap: Resolve crashes with LDAP authz and non-LDAP authn since
191 r1608202. [Eric Covener]
193 *) core: Ensure that httpd exits with an error status when the MPM fails
194 to run. [Yann Ylavic]
196 *) apreq: Content-Length header should be always interpreted as a decimal.
197 Leading 0 could be erroneously considered as an octal value. PR 56598.
198 [Chris Card <ctcard hotmail com>]
200 *) mod_proxy: Now allow for 191 character worker names, with non-fatal
201 errors if name is truncated. PR53218. [Jim Jagielski]
203 *) mod_ssl: Add optional function "ssl_get_tls_cb" to allow support
204 for channel bindings. [Simo Sorce <simo redhat.com>]
206 *) mod_proxy_wstunnel: Concurrent websockets messages could be
207 lost or delayed with ProxyWebsocketAsync enabled.
208 [Edward Lu <Chaosed0 gmail.com>]
210 *) core, mod_info: Add compiled and loaded PCRE versions to version
211 number display. [Rainer Jung]
213 *) mod_authnz_ldap: Return LDAP connections to the pool before the handler
214 is run, instead of waiting until the end of the request. [Eric Covener]
216 *) mod_log_config: Add GlobalLog to allow a globally defined log to
217 be inherited by virtual hosts that define a CustomLog.
218 [Edward Lu <Chaosed0 gmail.com>]
220 *) mod_proxy_html: support automatic detection of doctype and processing
221 of FPIs. PR56285 [Micha Lenk <micha lenk info>, Nick Kew]
223 *) mod_proxy_html: skip documents shorter than 4 bytes
224 PR 56286 [Micha Lenk <micha lenk info>]
226 *) mod_proxy_fdpass: Fix computation of the size of 'struct sockaddr_un'
227 when passed to 'connect()'.
228 [Graham Dumpleton <grahamd apache org>]
230 *) core: Add ap_mpm_resume_suspended() API to allow a suspended connection
232 [Artem <artemciy gmail.com>, Edward Lu <Chaosed0 gmail.com>]
234 *) core: Add ap_mpm_register_socket_callback_timeout() API. [Eric Covener]
236 *) mod_proxy_wstunnel: Honor ProxyWebsocketIdleTimeout in asynchronous
237 processing mode. [Eric Covener]
239 *) mod_authnz_ldap: Fail explicitly when the filter is too long. Remove
240 unnecessary apr_pstrdup() and strlen(). [Graham Leggett]
242 *) Add the ldap-search option to mod_authnz_ldap, allowing authorization
243 to be based on arbitrary expressions that do not include the username.
246 *) Add the ldap function to the expression API, allowing LDAP filters and
247 distinguished names based on expressions to be escaped correctly to
248 guard against LDAP injection. [Graham Leggett]
250 *) Add module mod_ssl_ct, which provides an implementation of Certificate
251 Transparency (RFC 6962) for httpd. [Jeff Trawick]
253 *) mod_remoteip: Prevent an external proxy from presenting an internal
254 proxy. PR 55962. [Mike Rumph]
256 *) mod_ssl: Add hooks to allow other modules to perform processing at
257 several stages of initialization and connection handling. See
258 mod_ssl_openssl.h. [Jeff Trawick]
260 *) mod_proxy_wstunnel: Avoid sending error responses down an upgraded
261 websockets connection as it is being close down. [Eric Covener]
263 *) mod_proxy_wstunnel: Allow the administrator to cap the amount
264 of time a synchronous websockets connection stays idle with
265 ProxyWebsocketIdleTimeout. [Eric Covener]
267 *) mod_proxy_wstunnel: Change to opt-in for asynchronous support, adding
268 directives ProxyWebsocketAsync and ProxyWebsocketAsyncDelay.
271 *) mod_proxy_wstunnel: Stop leaking websockets backend connections under
272 event MPM (trunk-only). [Eric Covener]
274 *) mod_proxy_http: Add detach_backend hook (potentially usable
275 in other proxy scheme handlers). [Jeff Trawick]
277 *) mod_deflate: Add DeflateAlterETag to control how the ETag
278 is modified. The 'NoChange' parameter mimics 2.2.x behavior.
279 PR 45023, PR 39727. [Eric Covener]
281 *) mod_rewrite: Add 'BNF' (backreferences-no-plus) flag to RewriteRule to
282 allow spaces in backreferences to be encoded as %20 instead of '+'.
285 *) mod_rewrite: Support an optional list of characters to escape in the
286 argument for the 'B' (escape backreferences) flag. [Eric Covener]
288 *) mod_dir: Default to 2.2-like behavior and skip execution when method is
289 neither GET nor POST, such as for DAV requests. PR 54914. [Chris Darroch]
291 *) mod_rewrite: Rename the handler that does per-directory internal
292 redirects to "rewrite-redirect-handler" from "redirect-handler" so
293 it is less ambiguous and less likely to be reused. [Eric Covener]
295 *) mod_rewrite: Protect against looping with the [N] flag by enforcing a
296 default limit of 10000 iterations, and allowing each rule to change its
297 limit. [Eric Covener]
299 *) mod_ssl: Fix config merging of SSLOCSPEnable and SSLOCSPOverrideResponder.
302 *) Add HttpContentLengthHeadZero and HttpExpectStrict directives.
303 [Yehuda Sadeh <yehuda inktank com>, Justin Erenkrantz]
305 *) mod_ssl: Add -t -DDUMP_CA_CERTS option which dumps the filenames of all
306 configured SSL CA certificates to stdout the same way as DUMP_CERTS does.
309 *) mod_ssl: Don't flush when an EOS is received. Prepares mod_ssl
310 to support write completion. [Graham Leggett]
312 *) core: Add parse_errorlog_arg callback to ap_errorlog_provider
313 to allow providers to check the ErrorLog argument. [Jan Kaluza]
315 *) mod_cgid: Use the servers Timeout for each read from a CGI script,
316 allow override with new CGIDRequestTimeout directive. PR43494
317 [Eric Covener, Toshikuni Fukaya <toshikuni-fukaya cybozu co jp>]
319 *) core: ensure any abnormal exit is reported to stderr if it's a tty.
322 *) mod_lua: Let the Inter-VM get/set functions work with a global
323 shared memory pool instead of a per-process pool. [Daniel Gruno]
325 *) ldap: Support ldaps when using the Microsoft LDAP SDK.
326 PR 54626. [Jean-Frederic Clere]
328 *) mod_authnz_ldap: Change default value of AuthLDAPMaxSubGroupDepth to 0
329 to avoid performance problems when subgroups aren't in use. [Eric Covener]
331 *) mod_syslog: New module implementing syslog ap_error_log provider.
332 Previously, this code was part of core, now it's in separate module.
335 *) core: Add ap_errorlog_provider to make ErrorLog logging modular. Move
336 syslog support from core to new mod_syslog. [Jan Kaluza]
338 *) mod_status, mod_echo: Fix the display of client addresses.
339 They were truncated to 31 characters which is not enough for IPv6 addresses.
340 PR 54848 [Bernhard Schmidt <berni birkenwald de>]
342 *) mod_unique_id: Use output of the PRNG rather than IP address and
343 pid, avoiding sleep() call and possible DNS issues at startup,
344 plus improving randomness for IPv6-only hosts.
345 [Jan Kaluza <jkaluza redhat.com>]
347 *) mod_file_cache: mod_file_cache should be able to serve files that
348 haven't had a Content-Type set via e.g. mod_mime. [Eric Covener]
350 *) core: merge AllowEncodedSlashes from the base configuration into
351 virtual hosts. [Eric Covener]
353 *) AIX: Install DSO's with "cp" instead of "install" in instdso.sh
356 *) mod_ldap: Don't keep retrying if a new LDAP connection times out.
359 *) mod_deflate: permit compilation of mod_deflate against a zlib that has
360 been configured with -D Z_PREFIX, which redefines the token "deflate".
363 *) mod_auth_digest: Use the secret when generating nonces in all cases and
364 not only when AuthName is used in .htaccess files (this change may cause
365 problems if used with round robin load balancers). Don't regenerate the
366 secret on graceful restarts. PR 54637 [Stefan Fritsch]
368 *) core: Remove apr_brigade_flatten(), buffering and duplicated code
369 from the HTTP_IN filter, parse chunks in a single pass with zero copy.
370 Reduce memory usage by 48 bytes per request. [Graham Leggett]
372 *) core: Stop the HTTP_IN filter from attempting to write error buckets
373 to the output filters, which is bogus in the proxy case. Create a
374 clean mapping from APR codes to HTTP status codes, and use it where
375 needed. [Graham Leggett]
377 *) mod_proxy: Ensure network errors detected by the proxy are returned as
378 504 Gateway Timout as opposed to 502 Bad Gateway, in order to be
379 compliant with RFC2616 14.9.4 Cache Revalidation and Reload Controls.
381 *) mod_dav: mod_dav overrides dav_fs response on PUT failure. PR 35981
382 [Basant Kumar Kukreja <basant.kukreja sun.com>, Alejandro Alvarez
383 <alejandro.alvarez.ayllon cern.ch>]
385 *) mod_ldap: LDAP connections used for authentication were not respecting
386 LDAPConnectionPoolTimeout. PR 54587
388 *) core: ap_rgetline_core now pulls from r->proto_input_filters.
390 *) mod_proxy_html: process parsed comments immediately.
391 Fixes bug where parsed comments may be lost. [Nick Kew]
393 *) mod_proxy_html: introduce doctype for HTML 5 [Nick Kew]
395 *) mod_proxy_html: fix typo-bug processing "strict" vs "transitional"
396 HTML/XHTML [Nick Kew]
398 *) core: Add option to add valgrind support. Use it to reduce false positive
399 warnings in mod_ssl. [Stefan Fritsch]
401 *) mod_authn_file, mod_authn_dbd, mod_authn_dbm, mod_authn_socache:
402 Cache the result of the most recent password hash verification for every
403 keep-alive connection. This saves some expensive calculations.
406 *) http: Remove support for Request-Range header sent by Navigator 2-3 and
407 MSIE 3. [Stefan Fritsch]
409 *) core, http: Extend HttpProtocol with an option to enforce stricter HTTP
410 conformance or to only log the found problems. [Stefan Fritsch]
412 *) core: Correctly parse an IPv6 literal host specification in an absolute
413 URL in the request line. [Stefan Fritsch]
417 *) core: Add LogLevelOverride directive that allows to override the
418 loglevel for clients from certain IPs. This also works for things
419 like the SSL handshake where <If> LogLevel ... </If> is evaluated
420 too late. [Stefan Fritsch]
422 *) core: Add new directive Warning to issue warnings from a configuration
423 file. Both Warning and Error now generate a timestamped log message.
426 *) ap_expr: Add SERVER_PROTOCOL_VERSION, ..._MAJOR, and ..._MINOR
427 variables. [Stefan Fritsch]
429 *) core: New directive RegisterHttpMethod for registering non-standard
430 HTTP methods. [Stefan Fritsch]
432 *) core: New directive HttpProtocol which allows to disable HTTP/0.9
433 support. [Stefan Fritsch]
435 *) mod_allowhandlers: New module to forbid specific handlers for specific
436 directories. [Stefan Fritsch]
438 *) mod_systemd: New module, for integration with systemd on Linux.
439 [Jan Kaluza <jkaluza redhat.com>]
441 *) WinNT MPM: Store pid and generation for each thread in scoreboard
442 to allow tracking of threads from exiting children via mod_status
443 or other such mechanisms. [Jeff Trawick]
445 *) The following now respect DefaultRuntimeDir/DEFAULT_REL_RUNTIMEDIR:
446 - APIs: ap_log_pid(), ap_remove_pid, ap_read_pid()
447 - mod_cache: thundering herd lock directory
448 - mod_lbmethod_heartbeat, mod_heartmonitor: heartbeat storage file
449 - mod_ldap: shared memory cache
450 - mod_socache_shmcb, mod_socache_dbm: shared memory or dbm for cache
453 *) suexec: Add --enable-suexec-capabilites support on Linux, to use
454 setuid/setgid capability bits rather than a setuid root binary.
457 *) suexec: Add support for logging to syslog as an alternative to logging
458 to a file; configure --without-suexec-logfile --with-suexec-syslog.
461 *) mod_ssl: Add support for TLS Next Protocol Negotiation. PR 52210.
462 [Matthew Steele <mdsteele google.com>]
464 *) cross-compile: allow to provide CC_FOR_BUILD so that gen_test_char will
465 be compiled by the build compiler instead of the host compiler.
466 Also set CC_FOR_BUILD to 'cc' when cross-compilation is detected.
467 PR 51257. [Guenter Knauf]
469 *) core: In maintainer mode, replace apr_palloc with a version that
470 initializes the allocated memory with non-zero values, except if
471 AP_DEBUG_NO_ALLOC_POISON is defined. [Stefan Fritsch]
473 *) mod_policy: Add a new testing module to help server administrators
474 enforce a configurable level of protocol compliance on their
475 servers and application servers behind theirs. [Graham Leggett]
477 *) mod_firehose: Add a new debugging module able to record traffic
478 passing through the server in such a way that connections and/or
479 requests be reconstructed and replayed. [Graham Leggett]
489 [Apache 2.5.0-dev includes those bug fixes and changes with the
490 Apache 2.4.xx tree as documented below, except as noted.]
492 Changes with Apache 2.4.x and later:
494 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/CHANGES?view=markup
496 Changes with Apache 2.2.x and later:
498 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.2.x/CHANGES?view=markup
500 Changes with Apache 2.0.x and later:
502 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.0.x/CHANGES?view=markup