2 Changes with Apache 2.5.0
4 *) mod_proxy_balancer: Prevent redirect loops between workers within a
5 balancer by limiting the number of redirects to the number balancer
6 members. PR 59864 [Ruediger Pluem]
8 *) mod_proxy: Correctly consider error response codes by the backend when
9 processing failonstatus. PR 59869 [Ruediger Pluem]
11 *) mod_proxy_fcgi: avoid loops when ProxyErrorOverride is enabled
12 and the error documents are proxied. PR 55415. [Luca Toscano]
14 *) mod_proxy_fcgi: read the whole FCGI response even when the content has
15 not been modified (HTTP 304) to avoid subsequent bogus reads and
16 confusing error messages logged. [Luca Toscano]
18 *) mod_crypto: Add the all purpose crypto filters with support for HLS.
21 *) ab: Add option -I to use the Server Name Indication (SNI) extension on
22 outgoing TLS connections, according to the Host header (if any) or the
23 requested URL's hostname otherwise. [Yann Ylavic]
25 *) mod_ssl: reset client-verify state of ssl when aborting renegotiations.
26 [Erki Aring <erki@example.ee>, Stefan Eissing]
28 *) mod_proxy_{http,ajp,fcgi}: don't reuse backend connections with data
29 available before the request is sent. PR 57832. [Yann Ylavic]
31 *) mod_sed: Fix 'x' command processing. [Christophe Jaillet]
33 *) core: Drop an invalid Last-Modified header value coming
34 from a FCGI/CGI script instead of replacing it with Unix epoch.
35 Warn the users about Last-Modified header value replacements and
36 improved handling of non-GMT datestr.
37 [Yann Ylavic, Luca Toscano]
39 *) mod_dav: Allow other modules to become providers and add ACLs
41 [Jari Urpalainen <jari.urpalainen nokia.com>, Graham Leggett]
43 *) mod_dav: Add dav_begin_multistatus, dav_send_one_response,
44 dav_finish_multistatus, dav_send_multistatus, dav_handle_err,
45 dav_failed_proppatch, dav_success_proppatch to mod_dav.h.
46 [Jari Urpalainen <jari.urpalainen nokia.com>, Graham Leggett]
48 *) core: Add -DDUMP_INCLUDES configtest option to show the tree
49 of Included configuration files. [Jacob Champion <champion.pxi gmail.com>]
51 *) mod_dav: Add support for childtags to dav_error.
52 [Jari Urpalainen <jari.urpalainen nokia.com>]
54 *) mod_proxy, mod_ssl: Handle SSLProxy* directives in <Proxy> sections,
55 allowing per backend TLS configuration. [Yann Ylavic]
57 *) core: explicitly exclude 'h2' from protocols announced via an Upgrade:
58 header as commanded by http-wg. [Stefan Eissing]
60 *) http: Respond with "408 Request Timeout" when a timeout occurs while
61 reading the request body. [Yann Ylavic]
63 *) scoreboard/status: Keep workers' previous Client, VHost and Request values
64 when idle, like in 2.4.18 and earlier. [Yann Ylavic]
66 *) mod_proxy_ajp: Add "secret" parameter to proxy workers to implement legacy
67 AJP13 authentication. PR 53098. [Dmitry A. Bakshaev <dab1818 gmail com>]
69 *) mpm_event: Don't take over scoreboard slots from gracefully finishing
70 threads. [Stefan Fritsch]
72 *) mod_status: Display the process slot number in the async connection
73 overview. [Stefan Fritsch]
75 *) mpm_event, mpm_worker: Fix computation of MinSpareThreads' lower bound
76 according the number of listeners buckets. [Yann Ylavic]
78 *) mpm: Generalise the ap_mpm_register_socket functions to accept pipes
79 or sockets. [Graham Leggett]
81 *) core: Extend support for setting aside data from the network input filter
82 to any connection or request input filter. [Graham Leggett]
84 *) mod_ssl: Add "no_crl_for_cert_ok" flag to SSLCARevocationCheck directive
85 to opt-in previous behaviour (2.2) with CRLs verification when checking
86 certificate(s) with no corresponding CRL. [Yann Ylavic]
88 *) core: Split ap_create_request() from ap_read_request(). [Graham Leggett]
90 *) ab: Use caseless matching for HTTP tokens (e.g. content-length). PR 59111.
93 *) mod_auth_digest: Fix compatibility with expression-based Authname. PR59039.
96 *) mpm: Add a complete_connection hook that confirms whether an MPM is allowed
97 to leave the WRITE_COMPLETION phase. Move filter code out of the MPMs.
100 *) core: Added support for HTTP code 451. PR58985.
101 [Yehuda Katz <yehuda ymkatz.net>, Jim Jagielski]
103 *) mod_ssl: Add support for OpenSSL 1.1.0. [Rainer Jung]
105 *) mod_filter: Fix AddOutputFilterByType with non-content-level filters.
106 PR58856 [Micha Lenk <micha lenk.info>]
108 *) mod_cache: Consider Cache-Control: s-maxage in expiration
109 calculations. [Eric Covener]
111 *) mod_cache: Allow caching of responses with an Expires header
112 in the past that also has Cache-Control: max-age or s-maxage.
113 PR55156. [Eric Covener]
115 *) Added many log numbers to log statements that had none.
117 *) mod_session: Introduce SessionExpiryUpdateInterval which allows to
118 configure the session/cookie expiry's update interval. PR 57300.
119 [Paul Spangler <paul.spangler ni.com>]
121 *) core: Extend support for asynchronous write completion from the
122 network filter to any connection or request filter. [Graham Leggett]
124 *) mpm_event: Free memory earlier when shutting down processes.
127 *) mod_auth_digest: remove AuthDigestEnableQueryStringHack which is no
128 more documented since dec 2012 (r1415960). [Christophe Jaillet]
130 *) mod_charset_lite: On EBCDIC platforms, make sure mod_charset_lite runs
131 after other resource-level filters. [Eric Covener]
133 *) mod_dir: Responses that go through "FallbackResource" might appear to
134 hang due to unterminated chunked encoding. PR58292. [Eric Covener]
136 *) http: Don't remove the Content-Length of zero from a HEAD response if
137 it comes from an origin server, module or script. [Yann Ylavic]
139 *) http: Add support for RFC2324/RFC7168. [Graham Leggett]
141 *) mod_rewrite: Add support for starting External Rewriting Programs
142 as non-root user on UNIX systems by specifying username and group name
143 as third argument of RewriteMap directive. [Jan Kaluza]
145 *) mod_authn_core: Add expression support to AuthName and AuthType.
148 *) suexec: Filter out the HTTP_PROXY environment variable because it is
149 treated as alias for http_proxy by some programs. [Stefan Fritsch]
151 *) mod_proxy_http: Don't establish or reuse a backend connection before pre-
152 fetching the request body, so to minimize the delay between it is supposed
153 to be alive and the first bytes sent: this is a best effort to prevent the
154 backend from closing because of idle or keepalive timeout in the meantime.
155 Also, handle a new "proxy-flushall" environment variable which allows to
156 flush any forwarded body data immediately. PR 56541+37920. [Yann Ylavic]
158 *) core: Define and UnDefine are no longer permitted in
159 directory context. Previously they would always be evaulated
160 as the configuration was read without regard for the directory
161 context. [Eric Covener]
163 *) config: For directives that do not expect any arguments, enforce
164 that none are specified in the configuration file.
165 [Joachim Zobel <jzobel heute-morgen.de>, Eric Covener]
167 *) mod_rewrite: Improve 'bad flag delimeters' startup error by showing
168 how the input was tokenized. PR 56528. [Edward Lu <Chaosed0 gmail.com>]
170 *) mod_proxy: Don't put non balancer-member workers in error state by
171 default for connection or 500/503 errors, and honor status=+I for
172 any error. PR 48388. [Yann Ylavic]
174 *) mod_socache_memcache: Pass expiration time through to memcached. PR 55445.
175 [Faidon Liambotis <paravoid debian.org>, Joe Orton]
177 *) ap_expr: Add filemod function for checking file modification dates
180 *) mod_authnz_ldap: Resolve crashes with LDAP authz and non-LDAP authn since
181 r1608202. [Eric Covener]
183 *) apreq: Content-Length header should be always interpreted as a decimal.
184 Leading 0 could be erroneously considered as an octal value. PR 56598.
185 [Chris Card <ctcard hotmail com>]
187 *) mod_proxy: Now allow for 191 character worker names, with non-fatal
188 errors if name is truncated. PR53218. [Jim Jagielski]
190 *) mod_ssl: Add optional function "ssl_get_tls_cb" to allow support
191 for channel bindings. [Simo Sorce <simo redhat.com>]
193 *) mod_proxy_wstunnel: Concurrent websockets messages could be
194 lost or delayed with ProxyWebsocketAsync enabled.
195 [Edward Lu <Chaosed0 gmail.com>]
197 *) core, mod_info: Add compiled and loaded PCRE versions to version
198 number display. [Rainer Jung]
200 *) mod_authnz_ldap: Return LDAP connections to the pool before the handler
201 is run, instead of waiting until the end of the request. [Eric Covener]
203 *) mod_proxy_html: support automatic detection of doctype and processing
204 of FPIs. PR56285 [Micha Lenk <micha lenk info>, Nick Kew]
206 *) mod_proxy_html: skip documents shorter than 4 bytes
207 PR 56286 [Micha Lenk <micha lenk info>]
209 *) mod_proxy_fdpass: Fix computation of the size of 'struct sockaddr_un'
210 when passed to 'connect()'.
211 [Graham Dumpleton <grahamd apache org>]
213 *) core: Add ap_mpm_resume_suspended() API to allow a suspended connection
215 [Artem <artemciy gmail.com>, Edward Lu <Chaosed0 gmail.com>]
217 *) core: Add ap_mpm_register_socket_callback_timeout() API. [Eric Covener]
219 *) mod_proxy_wstunnel: Honor ProxyWebsocketIdleTimeout in asynchronous
220 processing mode. [Eric Covener]
222 *) mod_authnz_ldap: Fail explicitly when the filter is too long. Remove
223 unnecessary apr_pstrdup() and strlen(). [Graham Leggett]
225 *) Add the ldap-search option to mod_authnz_ldap, allowing authorization
226 to be based on arbitrary expressions that do not include the username.
229 *) Add the ldap function to the expression API, allowing LDAP filters and
230 distinguished names based on expressions to be escaped correctly to
231 guard against LDAP injection. [Graham Leggett]
233 *) Add module mod_ssl_ct, which provides an implementation of Certificate
234 Transparency (RFC 6962) for httpd. [Jeff Trawick]
236 *) mod_proxy_wstunnel: Avoid sending error responses down an upgraded
237 websockets connection as it is being close down. [Eric Covener]
239 *) mod_proxy_wstunnel: Allow the administrator to cap the amount
240 of time a synchronous websockets connection stays idle with
241 ProxyWebsocketIdleTimeout. [Eric Covener]
243 *) mod_proxy_wstunnel: Change to opt-in for asynchronous support, adding
244 directives ProxyWebsocketAsync and ProxyWebsocketAsyncDelay.
247 *) mod_proxy_wstunnel: Stop leaking websockets backend connections under
248 event MPM (trunk-only). [Eric Covener]
250 *) mod_proxy_http: Add detach_backend hook (potentially usable
251 in other proxy scheme handlers). [Jeff Trawick]
253 *) mod_deflate: Add DeflateAlterETag to control how the ETag
254 is modified. The 'NoChange' parameter mimics 2.2.x behavior.
255 PR 45023, PR 39727. [Eric Covener]
257 *) mod_rewrite: Add 'BNF' (backreferences-no-plus) flag to RewriteRule to
258 allow spaces in backreferences to be encoded as %20 instead of '+'.
261 *) mod_rewrite: Support an optional list of characters to escape in the
262 argument for the 'B' (escape backreferences) flag. [Eric Covener]
264 *) mod_dir: Default to 2.2-like behavior and skip execution when method is
265 neither GET nor POST, such as for DAV requests. PR 54914. [Chris Darroch]
267 *) mod_rewrite: Rename the handler that does per-directory internal
268 redirects to "rewrite-redirect-handler" from "redirect-handler" so
269 it is less ambiguous and less likely to be reused. [Eric Covener]
271 *) mod_rewrite: Protect against looping with the [N] flag by enforcing a
272 default limit of 10000 iterations, and allowing each rule to change its
273 limit. [Eric Covener]
275 *) mod_ssl: Fix config merging of SSLOCSPEnable and SSLOCSPOverrideResponder.
278 *) Add HttpContentLengthHeadZero and HttpExpectStrict directives.
279 [Yehuda Sadeh <yehuda inktank com>, Justin Erenkrantz]
281 *) mod_ssl: Add -t -DDUMP_CA_CERTS option which dumps the filenames of all
282 configured SSL CA certificates to stdout the same way as DUMP_CERTS does.
285 *) mod_ssl: Don't flush when an EOS is received. Prepares mod_ssl
286 to support write completion. [Graham Leggett]
288 *) core: Add parse_errorlog_arg callback to ap_errorlog_provider
289 to allow providers to check the ErrorLog argument. [Jan Kaluza]
291 *) mod_cgid: Use the servers Timeout for each read from a CGI script,
292 allow override with new CGIDRequestTimeout directive. PR43494
293 [Eric Covener, Toshikuni Fukaya <toshikuni-fukaya cybozu co jp>]
295 *) core: ensure any abnormal exit is reported to stderr if it's a tty.
298 *) mod_lua: Let the Inter-VM get/set functions work with a global
299 shared memory pool instead of a per-process pool. [Daniel Gruno]
301 *) ldap: Support ldaps when using the Microsoft LDAP SDK.
302 PR 54626. [Jean-Frederic Clere]
304 *) mod_authnz_ldap: Change default value of AuthLDAPMaxSubGroupDepth to 0
305 to avoid performance problems when subgroups aren't in use. [Eric Covener]
307 *) mod_syslog: New module implementing syslog ap_error_log provider.
308 Previously, this code was part of core, now it's in separate module.
311 *) core: Add ap_errorlog_provider to make ErrorLog logging modular. Move
312 syslog support from core to new mod_syslog. [Jan Kaluza]
314 *) mod_status, mod_echo: Fix the display of client addresses.
315 They were truncated to 31 characters which is not enough for IPv6 addresses.
316 PR 54848 [Bernhard Schmidt <berni birkenwald de>]
318 *) mod_unique_id: Use output of the PRNG rather than IP address and
319 pid, avoiding sleep() call and possible DNS issues at startup,
320 plus improving randomness for IPv6-only hosts.
321 [Jan Kaluza <jkaluza redhat.com>]
323 *) mod_file_cache: mod_file_cache should be able to serve files that
324 haven't had a Content-Type set via e.g. mod_mime. [Eric Covener]
326 *) core: merge AllowEncodedSlashes from the base configuration into
327 virtual hosts. [Eric Covener]
329 *) AIX: Install DSO's with "cp" instead of "install" in instdso.sh
332 *) mod_ldap: Don't keep retrying if a new LDAP connection times out.
335 *) mod_deflate: permit compilation of mod_deflate against a zlib that has
336 been configured with -D Z_PREFIX, which redefines the token "deflate".
339 *) mod_auth_digest: Use the secret when generating nonces in all cases and
340 not only when AuthName is used in .htaccess files (this change may cause
341 problems if used with round robin load balancers). Don't regenerate the
342 secret on graceful restarts. PR 54637 [Stefan Fritsch]
344 *) core: Remove apr_brigade_flatten(), buffering and duplicated code
345 from the HTTP_IN filter, parse chunks in a single pass with zero copy.
346 Reduce memory usage by 48 bytes per request. [Graham Leggett]
348 *) core: Stop the HTTP_IN filter from attempting to write error buckets
349 to the output filters, which is bogus in the proxy case. Create a
350 clean mapping from APR codes to HTTP status codes, and use it where
351 needed. [Graham Leggett]
353 *) mod_proxy: Ensure network errors detected by the proxy are returned as
354 504 Gateway Timout as opposed to 502 Bad Gateway, in order to be
355 compliant with RFC2616 14.9.4 Cache Revalidation and Reload Controls.
357 *) mod_dav: mod_dav overrides dav_fs response on PUT failure. PR 35981
358 [Basant Kumar Kukreja <basant.kukreja sun.com>, Alejandro Alvarez
359 <alejandro.alvarez.ayllon cern.ch>]
361 *) mod_ldap: LDAP connections used for authentication were not respecting
362 LDAPConnectionPoolTimeout. PR 54587
364 *) core: ap_rgetline_core now pulls from r->proto_input_filters.
366 *) mod_proxy_html: process parsed comments immediately.
367 Fixes bug where parsed comments may be lost. [Nick Kew]
369 *) mod_proxy_html: introduce doctype for HTML 5 [Nick Kew]
371 *) mod_proxy_html: fix typo-bug processing "strict" vs "transitional"
372 HTML/XHTML [Nick Kew]
374 *) core: Add option to add valgrind support. Use it to reduce false positive
375 warnings in mod_ssl. [Stefan Fritsch]
377 *) mod_authn_file, mod_authn_dbd, mod_authn_dbm, mod_authn_socache:
378 Cache the result of the most recent password hash verification for every
379 keep-alive connection. This saves some expensive calculations.
382 *) http: Remove support for Request-Range header sent by Navigator 2-3 and
383 MSIE 3. [Stefan Fritsch]
385 *) core, http: Extend HttpProtocol with an option to enforce stricter HTTP
386 conformance or to only log the found problems. [Stefan Fritsch]
388 *) core: Correctly parse an IPv6 literal host specification in an absolute
389 URL in the request line. [Stefan Fritsch]
393 *) core: Add LogLevelOverride directive that allows to override the
394 loglevel for clients from certain IPs. This also works for things
395 like the SSL handshake where <If> LogLevel ... </If> is evaluated
396 too late. [Stefan Fritsch]
398 *) core: Add new directive Warning to issue warnings from a configuration
399 file. Both Warning and Error now generate a timestamped log message.
402 *) ap_expr: Add SERVER_PROTOCOL_VERSION, ..._MAJOR, and ..._MINOR
403 variables. [Stefan Fritsch]
405 *) core: New directive RegisterHttpMethod for registering non-standard
406 HTTP methods. [Stefan Fritsch]
408 *) core: New directive HttpProtocol which allows to disable HTTP/0.9
409 support. [Stefan Fritsch]
411 *) mod_allowhandlers: New module to forbid specific handlers for specific
412 directories. [Stefan Fritsch]
414 *) mod_systemd: New module, for integration with systemd on Linux.
415 [Jan Kaluza <jkaluza redhat.com>]
417 *) WinNT MPM: Store pid and generation for each thread in scoreboard
418 to allow tracking of threads from exiting children via mod_status
419 or other such mechanisms. [Jeff Trawick]
421 *) The following now respect DefaultRuntimeDir/DEFAULT_REL_RUNTIMEDIR:
422 - APIs: ap_log_pid(), ap_remove_pid, ap_read_pid()
423 - mod_cache: thundering herd lock directory
424 - mod_lbmethod_heartbeat, mod_heartmonitor: heartbeat storage file
425 - mod_ldap: shared memory cache
426 - mod_socache_shmcb, mod_socache_dbm: shared memory or dbm for cache
429 *) suexec: Add --enable-suexec-capabilites support on Linux, to use
430 setuid/setgid capability bits rather than a setuid root binary.
433 *) suexec: Add support for logging to syslog as an alternative to logging
434 to a file; configure --without-suexec-logfile --with-suexec-syslog.
437 *) mod_ssl: Add support for TLS Next Protocol Negotiation. PR 52210.
438 [Matthew Steele <mdsteele google.com>]
440 *) cross-compile: allow to provide CC_FOR_BUILD so that gen_test_char will
441 be compiled by the build compiler instead of the host compiler.
442 Also set CC_FOR_BUILD to 'cc' when cross-compilation is detected.
443 PR 51257. [Guenter Knauf]
445 *) core: In maintainer mode, replace apr_palloc with a version that
446 initializes the allocated memory with non-zero values, except if
447 AP_DEBUG_NO_ALLOC_POISON is defined. [Stefan Fritsch]
449 *) mod_policy: Add a new testing module to help server administrators
450 enforce a configurable level of protocol compliance on their
451 servers and application servers behind theirs. [Graham Leggett]
453 *) mod_firehose: Add a new debugging module able to record traffic
454 passing through the server in such a way that connections and/or
455 requests be reconstructed and replayed. [Graham Leggett]
465 [Apache 2.5.0-dev includes those bug fixes and changes with the
466 Apache 2.4.xx tree as documented below, except as noted.]
468 Changes with Apache 2.4.x and later:
470 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/CHANGES?view=markup
472 Changes with Apache 2.2.x and later:
474 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.2.x/CHANGES?view=markup
476 Changes with Apache 2.0.x and later:
478 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.0.x/CHANGES?view=markup