2 Changes with Apache 2.5.0
4 *) Evaluate nested If/ElseIf/Else configuration blocks.
5 [Luca Toscano, Jacob Champion]
7 *) Introduce request taint checking framework to prevent privilege
8 hijacking through .htaccess. [Nick Kew]
10 *) mod_proxy_wstunnel: Add "upgrade" parameter to allow upgrade to other
11 protocols. [Jean-Frederic Clere]
13 *) mod_substitute: Fix spurious AH01328 (Line too long) errors on EBCDIC
14 systems. [Eric Covener]
16 *) core: Disallow multiple Listen on the same IP:port when listener buckets
17 are configured (ListenCoresBucketsRatio > 0), consistently with the single
18 bucket case (default), thus avoiding the leak of the corresponding socket
19 descriptors on graceful restart. [Yann Ylavic]
21 *) mod_autoindex: Add IndexOptions UseOldDateFormat to allow the date
22 format from 2.2 in the Last Modified column. PR60846.
23 [Hank Ibell <hwibell gmail.com>]
25 *) Add <IfDirective> and <IfSection> directives. [Joe Orton]
27 *) mod_syslog: Support use of optional "tag" in syslog entries.
28 PR 60525. [Ben Rubson <ben.rubson gmail.com>, Jim Jagielski]
30 *) MPMs unix: Place signals handlers and helpers out of DSOs to avoid
31 a possible crash if a signal is caught during (graceful) restart.
32 PR 60487. [Yann Ylavic]
34 *) mod_proxy: Allow the per-request environment variable "no-proxy" to
35 be used as an alternative to ProxyPass /path !. This is primarily
36 to set exceptions for ProxyPass specified in <Location> context.
37 Use SetEnvIf, not SetEnv. [Eric Covener]
39 *) When using mod_status with the Event MPM, report the number of requests
40 associated with an active connection in the "ACC" field. Previously
41 zero was always reported with this MPM. PR60647. [Eric Covener]
43 *) mod_proxy_hcheck: Don't validate timed out responses. [Yann Ylavic]
45 *) mod_proxy_fcgi: Return to 2.4.20-and-earlier behavior of leaving
46 a "proxy:fcgi://" prefix in the SCRIPT_FILENAME environment variable by
47 default. Add ProxyFCGIBackendType to allow the type of backend to be
48 specified so these kinds of fixups can be restored without impacting
49 FPM. PR60576 [Eric Covener, Jim Jagielski]
51 *) core: EBCDIC fixes for interim responses with additional headers.
54 *) mod_remoteip: Add support for PROXY protocol (code donated by Cloudzilla).
55 Add ability for PROXY protocol processing to be optional to donated code.
56 See also: http://www.haproxy.org/download/1.5/doc/proxy-protocol.txt
57 [Cloudzilla/roadrunner2@GitHub, Jim Jagielski, Daniel Ruggeri]
59 *) mod_rewrite: When a substitution is a fully qualified URL, and the
60 scheme/host/port matches the current virtual host, stop interpreting the
61 path component as a local path just because the first component of the
62 path exists in the filesystem. Adds RewriteOption "LegacyPrefixDocRoot"
63 to revert to previous behavior. PR60009.
64 [Hank Ibell <hwibell gmail.com>]
66 *) core: Add %{REMOTE_PORT} to the expression parser. PR59938
67 [Hank Ibell <hwibell gmail.com>]
69 *) mod_remoteip: When overriding the useragent address from X-Forwarded-For,
70 zero out what had been initialized as the connection-level port. PR59931.
71 [Hank Ibell <hwibell gmail.com>]
73 *) mod_proxy_wstunnel: Reliably run before mod_proxy_http.
76 *) mod_proxy_protocol: Add server-side, front-end support for PROXY PROTOCOL
77 (http://blog.haproxy.com/haproxy/proxy-protocol/). [roadrunner2]
79 *) mod_proxy_fcgi: Return HTTP 504 rather than 503 in case of proxy timeout.
82 *) http: Allow unknown response status' lines returned in the form of
83 "HTTP/x.x xxx Status xxx". [Yann Ylavic]
85 *) core: Add <IfFile> configuration section to allow any file on disk to be
86 used as a conditional. [Edward Lu, Eric Covener]
88 *) event: Avoid listener periodic wake ups by using the pollset wake-ability
89 when available. PR 57399. [Yann Ylavic, Luca Toscano]
91 *) mod_brotli: Add a new module for dynamic Brotli (RFC 7932) compression.
94 *) core: Permit unencoded ';' characters to appear in proxy requests and
95 Location: response headers. Corresponds to modern browser behavior.
98 *) mod_crypto: Add the all purpose crypto filters with support for HLS.
101 *) core: Drop an invalid Last-Modified header value coming
102 from a FCGI/CGI script instead of replacing it with Unix epoch.
103 Warn the users about Last-Modified header value replacements
104 and violations of the RFC.
105 [Yann Ylavic, Luca Toscano, William Rowe, Jacob Champion]
107 *) mod_dav: Allow other modules to become providers and add ACLs
109 [Jari Urpalainen <jari.urpalainen nokia.com>, Graham Leggett]
111 *) mod_dav: Add dav_begin_multistatus, dav_send_one_response,
112 dav_finish_multistatus, dav_send_multistatus, dav_handle_err,
113 dav_failed_proppatch, dav_success_proppatch to mod_dav.h.
114 [Jari Urpalainen <jari.urpalainen nokia.com>, Graham Leggett]
116 *) mod_proxy, mod_ssl: Handle SSLProxy* directives in <Proxy> sections,
117 allowing per backend TLS configuration. [Yann Ylavic]
119 *) core: explicitly exclude 'h2' from protocols announced via an Upgrade:
120 header as commanded by http-wg. [Stefan Eissing]
122 *) mod_proxy_ajp: Add "secret" parameter to proxy workers to implement legacy
123 AJP13 authentication. PR 53098. [Dmitry A. Bakshaev <dab1818 gmail com>]
125 *) mpm: Generalise the ap_mpm_register_socket functions to accept pipes
126 or sockets. [Graham Leggett]
128 *) core: Extend support for setting aside data from the network input filter
129 to any connection or request input filter. [Graham Leggett]
131 *) core: Split ap_create_request() from ap_read_request(). [Graham Leggett]
133 *) mod_auth_digest: Fix compatibility with expression-based Authname. PR59039.
136 *) mpm: Add a complete_connection hook that confirms whether an MPM is allowed
137 to leave the WRITE_COMPLETION phase. Move filter code out of the MPMs.
140 *) core: Added support for HTTP code 451. PR58985.
141 [Yehuda Katz <yehuda ymkatz.net>, Jim Jagielski]
143 *) mod_filter: Fix AddOutputFilterByType with non-content-level filters.
144 PR58856 [Micha Lenk <micha lenk.info>]
146 *) mod_cache: Consider Cache-Control: s-maxage in expiration
147 calculations. [Eric Covener]
149 *) mod_cache: Allow caching of responses with an Expires header
150 in the past that also has Cache-Control: max-age or s-maxage.
151 PR55156. [Eric Covener]
153 *) Added many log numbers to log statements that had none.
155 *) mod_session: Introduce SessionExpiryUpdateInterval which allows to
156 configure the session/cookie expiry's update interval. PR 57300.
157 [Paul Spangler <paul.spangler ni.com>]
159 *) core: Extend support for asynchronous write completion from the
160 network filter to any connection or request filter. [Graham Leggett]
162 *) mod_auth_digest: remove AuthDigestEnableQueryStringHack which is no
163 more documented since dec 2012 (r1415960). [Christophe Jaillet]
165 *) mod_charset_lite: On EBCDIC platforms, make sure mod_charset_lite runs
166 after other resource-level filters. [Eric Covener]
168 *) http: Don't remove the Content-Length of zero from a HEAD response if
169 it comes from an origin server, module or script. [Yann Ylavic]
171 *) http: Add support for RFC2324/RFC7168. [Graham Leggett]
173 *) mod_rewrite: Add support for starting External Rewriting Programs
174 as non-root user on UNIX systems by specifying username and group name
175 as third argument of RewriteMap directive. [Jan Kaluza]
177 *) mod_authn_core: Add expression support to AuthName and AuthType.
180 *) suexec: Filter out the HTTP_PROXY environment variable because it is
181 treated as alias for http_proxy by some programs. [Stefan Fritsch]
183 *) mod_proxy_http: Don't establish or reuse a backend connection before pre-
184 fetching the request body, so to minimize the delay between it is supposed
185 to be alive and the first bytes sent: this is a best effort to prevent the
186 backend from closing because of idle or keepalive timeout in the meantime.
187 Also, handle a new "proxy-flushall" environment variable which allows to
188 flush any forwarded body data immediately. PR 56541+37920. [Yann Ylavic]
190 *) core: Define and UnDefine are no longer permitted in
191 directory context. Previously they would always be evaulated
192 as the configuration was read without regard for the directory
193 context. [Eric Covener]
195 *) config: For directives that do not expect any arguments, enforce
196 that none are specified in the configuration file.
197 [Joachim Zobel <jzobel heute-morgen.de>, Eric Covener]
199 *) mod_rewrite: Improve 'bad flag delimeters' startup error by showing
200 how the input was tokenized. PR 56528. [Edward Lu <Chaosed0 gmail.com>]
202 *) mod_proxy: Don't put non balancer-member workers in error state by
203 default for connection or 500/503 errors, and honor status=+I for
204 any error. PR 48388. [Yann Ylavic]
206 *) mod_socache_memcache: Pass expiration time through to memcached. PR 55445.
207 [Faidon Liambotis <paravoid debian.org>, Joe Orton]
209 *) ap_expr: Add filemod function for checking file modification dates
212 *) mod_authnz_ldap: Resolve crashes with LDAP authz and non-LDAP authn since
213 r1608202. [Eric Covener]
215 *) apreq: Content-Length header should be always interpreted as a decimal.
216 Leading 0 could be erroneously considered as an octal value. PR 56598.
217 [Chris Card <ctcard hotmail com>]
219 *) mod_proxy: Now allow for 191 character worker names, with non-fatal
220 errors if name is truncated. PR53218. [Jim Jagielski]
222 *) mod_ssl: Add optional function "ssl_get_tls_cb" to allow support
223 for channel bindings. [Simo Sorce <simo redhat.com>]
225 *) mod_proxy_wstunnel: Concurrent websockets messages could be
226 lost or delayed with ProxyWebsocketAsync enabled.
227 [Edward Lu <Chaosed0 gmail.com>]
229 *) core, mod_info: Add compiled and loaded PCRE versions to version
230 number display. [Rainer Jung]
232 *) mod_authnz_ldap: Return LDAP connections to the pool before the handler
233 is run, instead of waiting until the end of the request. [Eric Covener]
235 *) mod_proxy_html: support automatic detection of doctype and processing
236 of FPIs. PR56285 [Micha Lenk <micha lenk info>, Nick Kew]
238 *) mod_proxy_html: skip documents shorter than 4 bytes
239 PR 56286 [Micha Lenk <micha lenk info>]
241 *) mod_proxy_fdpass: Fix computation of the size of 'struct sockaddr_un'
242 when passed to 'connect()'.
243 [Graham Dumpleton <grahamd apache org>]
245 *) core: Add ap_mpm_resume_suspended() API to allow a suspended connection
247 [Artem <artemciy gmail.com>, Edward Lu <Chaosed0 gmail.com>]
249 *) core: Add ap_mpm_register_socket_callback_timeout() API. [Eric Covener]
251 *) mod_proxy_wstunnel: Honor ProxyWebsocketIdleTimeout in asynchronous
252 processing mode. [Eric Covener]
254 *) mod_authnz_ldap: Fail explicitly when the filter is too long. Remove
255 unnecessary apr_pstrdup() and strlen(). [Graham Leggett]
257 *) Add the ldap-search option to mod_authnz_ldap, allowing authorization
258 to be based on arbitrary expressions that do not include the username.
261 *) Add the ldap function to the expression API, allowing LDAP filters and
262 distinguished names based on expressions to be escaped correctly to
263 guard against LDAP injection. [Graham Leggett]
265 *) Add module mod_ssl_ct, which provides an implementation of Certificate
266 Transparency (RFC 6962) for httpd. [Jeff Trawick]
268 *) mod_proxy_wstunnel: Avoid sending error responses down an upgraded
269 websockets connection as it is being close down. [Eric Covener]
271 *) mod_proxy_wstunnel: Allow the administrator to cap the amount
272 of time a synchronous websockets connection stays idle with
273 ProxyWebsocketIdleTimeout. [Eric Covener]
275 *) mod_proxy_wstunnel: Change to opt-in for asynchronous support, adding
276 directives ProxyWebsocketAsync and ProxyWebsocketAsyncDelay.
279 *) mod_proxy_wstunnel: Stop leaking websockets backend connections under
280 event MPM (trunk-only). [Eric Covener]
282 *) mod_proxy_http: Add detach_backend hook (potentially usable
283 in other proxy scheme handlers). [Jeff Trawick]
285 *) mod_deflate: Add DeflateAlterETag to control how the ETag
286 is modified. The 'NoChange' parameter mimics 2.2.x behavior.
287 PR 45023, PR 39727. [Eric Covener]
289 *) mod_rewrite: Add 'BNF' (backreferences-no-plus) flag to RewriteRule to
290 allow spaces in backreferences to be encoded as %20 instead of '+'.
293 *) mod_rewrite: Support an optional list of characters to escape in the
294 argument for the 'B' (escape backreferences) flag. [Eric Covener]
296 *) mod_dir: Default to 2.2-like behavior and skip execution when method is
297 neither GET nor POST, such as for DAV requests. PR 54914. [Chris Darroch]
299 *) mod_rewrite: Rename the handler that does per-directory internal
300 redirects to "rewrite-redirect-handler" from "redirect-handler" so
301 it is less ambiguous and less likely to be reused. [Eric Covener]
303 *) mod_rewrite: Protect against looping with the [N] flag by enforcing a
304 default limit of 10000 iterations, and allowing each rule to change its
305 limit. [Eric Covener]
307 *) mod_ssl: Fix config merging of SSLOCSPEnable and SSLOCSPOverrideResponder.
310 *) Add HttpContentLengthHeadZero and HttpExpectStrict directives.
311 [Yehuda Sadeh <yehuda inktank com>, Justin Erenkrantz]
313 *) mod_ssl: Add -t -DDUMP_CA_CERTS option which dumps the filenames of all
314 configured SSL CA certificates to stdout the same way as DUMP_CERTS does.
317 *) mod_ssl: Don't flush when an EOS is received. Prepares mod_ssl
318 to support write completion. [Graham Leggett]
320 *) core: Add parse_errorlog_arg callback to ap_errorlog_provider
321 to allow providers to check the ErrorLog argument. [Jan Kaluza]
323 *) mod_cgid: Use the servers Timeout for each read from a CGI script,
324 allow override with new CGIDRequestTimeout directive. PR43494
325 [Eric Covener, Toshikuni Fukaya <toshikuni-fukaya cybozu co jp>]
327 *) core: ensure any abnormal exit is reported to stderr if it's a tty.
330 *) mod_lua: Let the Inter-VM get/set functions work with a global
331 shared memory pool instead of a per-process pool. [Daniel Gruno]
333 *) ldap: Support ldaps when using the Microsoft LDAP SDK.
334 PR 54626. [Jean-Frederic Clere]
336 *) mod_authnz_ldap: Change default value of AuthLDAPMaxSubGroupDepth to 0
337 to avoid performance problems when subgroups aren't in use. [Eric Covener]
339 *) mod_syslog: New module implementing syslog ap_error_log provider.
340 Previously, this code was part of core, now it's in separate module.
343 *) core: Add ap_errorlog_provider to make ErrorLog logging modular. Move
344 syslog support from core to new mod_syslog. [Jan Kaluza]
346 *) mod_status, mod_echo: Fix the display of client addresses.
347 They were truncated to 31 characters which is not enough for IPv6 addresses.
348 PR 54848 [Bernhard Schmidt <berni birkenwald de>]
350 *) mod_unique_id: Use output of the PRNG rather than IP address and
351 pid, avoiding sleep() call and possible DNS issues at startup,
352 plus improving randomness for IPv6-only hosts.
353 [Jan Kaluza <jkaluza redhat.com>]
355 *) mod_file_cache: mod_file_cache should be able to serve files that
356 haven't had a Content-Type set via e.g. mod_mime. [Eric Covener]
358 *) core: merge AllowEncodedSlashes from the base configuration into
359 virtual hosts. [Eric Covener]
361 *) AIX: Install DSO's with "cp" instead of "install" in instdso.sh
364 *) mod_ldap: Don't keep retrying if a new LDAP connection times out.
367 *) mod_deflate: permit compilation of mod_deflate against a zlib that has
368 been configured with -D Z_PREFIX, which redefines the token "deflate".
371 *) mod_auth_digest: Use the secret when generating nonces in all cases and
372 not only when AuthName is used in .htaccess files (this change may cause
373 problems if used with round robin load balancers). Don't regenerate the
374 secret on graceful restarts. PR 54637 [Stefan Fritsch]
376 *) core: Remove apr_brigade_flatten(), buffering and duplicated code
377 from the HTTP_IN filter, parse chunks in a single pass with zero copy.
378 Reduce memory usage by 48 bytes per request. [Graham Leggett]
380 *) core: Stop the HTTP_IN filter from attempting to write error buckets
381 to the output filters, which is bogus in the proxy case. Create a
382 clean mapping from APR codes to HTTP status codes, and use it where
383 needed. [Graham Leggett]
385 *) mod_proxy: Ensure network errors detected by the proxy are returned as
386 504 Gateway Timout as opposed to 502 Bad Gateway, in order to be
387 compliant with RFC2616 14.9.4 Cache Revalidation and Reload Controls.
389 *) mod_dav: mod_dav overrides dav_fs response on PUT failure. PR 35981
390 [Basant Kumar Kukreja <basant.kukreja sun.com>, Alejandro Alvarez
391 <alejandro.alvarez.ayllon cern.ch>]
393 *) mod_ldap: LDAP connections used for authentication were not respecting
394 LDAPConnectionPoolTimeout. PR 54587
396 *) core: ap_rgetline_core now pulls from r->proto_input_filters.
398 *) mod_proxy_html: process parsed comments immediately.
399 Fixes bug where parsed comments may be lost. [Nick Kew]
401 *) mod_proxy_html: introduce doctype for HTML 5 [Nick Kew]
403 *) mod_proxy_html: fix typo-bug processing "strict" vs "transitional"
404 HTML/XHTML [Nick Kew]
406 *) core: Add option to add valgrind support. Use it to reduce false positive
407 warnings in mod_ssl. [Stefan Fritsch]
409 *) mod_authn_file, mod_authn_dbd, mod_authn_dbm, mod_authn_socache:
410 Cache the result of the most recent password hash verification for every
411 keep-alive connection. This saves some expensive calculations.
414 *) http: Remove support for Request-Range header sent by Navigator 2-3 and
415 MSIE 3. [Stefan Fritsch]
417 *) core, http: Extend HttpProtocol with an option to enforce stricter HTTP
418 conformance or to only log the found problems. [Stefan Fritsch]
420 *) core: Correctly parse an IPv6 literal host specification in an absolute
421 URL in the request line. [Stefan Fritsch]
425 *) core: Add LogLevelOverride directive that allows to override the
426 loglevel for clients from certain IPs. This also works for things
427 like the SSL handshake where <If> LogLevel ... </If> is evaluated
428 too late. [Stefan Fritsch]
430 *) core: Add new directive Warning to issue warnings from a configuration
431 file. Both Warning and Error now generate a timestamped log message.
434 *) ap_expr: Add SERVER_PROTOCOL_VERSION, ..._MAJOR, and ..._MINOR
435 variables. [Stefan Fritsch]
437 *) core: New directive RegisterHttpMethod for registering non-standard
438 HTTP methods. [Stefan Fritsch]
440 *) core: New directive HttpProtocol which allows to disable HTTP/0.9
441 support. [Stefan Fritsch]
443 *) mod_allowhandlers: New module to forbid specific handlers for specific
444 directories. [Stefan Fritsch]
446 *) mod_systemd: New module, for integration with systemd on Linux.
447 [Jan Kaluza <jkaluza redhat.com>]
449 *) WinNT MPM: Store pid and generation for each thread in scoreboard
450 to allow tracking of threads from exiting children via mod_status
451 or other such mechanisms. [Jeff Trawick]
453 *) The following now respect DefaultRuntimeDir/DEFAULT_REL_RUNTIMEDIR:
454 - APIs: ap_log_pid(), ap_remove_pid, ap_read_pid()
455 - mod_cache: thundering herd lock directory
456 - mod_lbmethod_heartbeat, mod_heartmonitor: heartbeat storage file
457 - mod_ldap: shared memory cache
458 - mod_socache_shmcb, mod_socache_dbm: shared memory or dbm for cache
461 *) suexec: Add --enable-suexec-capabilites support on Linux, to use
462 setuid/setgid capability bits rather than a setuid root binary.
465 *) suexec: Add support for logging to syslog as an alternative to logging
466 to a file; configure --without-suexec-logfile --with-suexec-syslog.
469 *) mod_ssl: Add support for TLS Next Protocol Negotiation. PR 52210.
470 [Matthew Steele <mdsteele google.com>]
472 *) cross-compile: allow to provide CC_FOR_BUILD so that gen_test_char will
473 be compiled by the build compiler instead of the host compiler.
474 Also set CC_FOR_BUILD to 'cc' when cross-compilation is detected.
475 PR 51257. [Guenter Knauf]
477 *) core: In maintainer mode, replace apr_palloc with a version that
478 initializes the allocated memory with non-zero values, except if
479 AP_DEBUG_NO_ALLOC_POISON is defined. [Stefan Fritsch]
481 *) mod_policy: Add a new testing module to help server administrators
482 enforce a configurable level of protocol compliance on their
483 servers and application servers behind theirs. [Graham Leggett]
485 *) mod_firehose: Add a new debugging module able to record traffic
486 passing through the server in such a way that connections and/or
487 requests be reconstructed and replayed. [Graham Leggett]
497 [Apache 2.5.0-dev includes those bug fixes and changes with the
498 Apache 2.4.xx tree as documented below, except as noted.]
500 Changes with Apache 2.4.x and later:
502 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/CHANGES?view=markup
504 Changes with Apache 2.2.x and later:
506 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.2.x/CHANGES?view=markup
508 Changes with Apache 2.0.x and later:
510 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.0.x/CHANGES?view=markup