2 Changes with Apache 2.5.0
4 *) mod_http2: Fix async write issue that led to selection of wrong timeout
5 vs. keepalive timeout selection for idle sessions.
7 *) mod_http2: checking LimitRequestLine, LimitRequestFields and
8 LimitRequestFieldSize configurated values for incoming streams. Returning
9 HTTP status 431 for too long/many headers fields and 414 for a too long
10 pseudo header. [Stefan Eissing]
12 *) mod_http2: tracking conn_rec->current_thread on slave connections, so
13 that mod_lua finds the correct one. Fixes PR 59542. [Stefan Eissing]
15 *) mod_proxy, mod_ssl: Handle SSLProxy* directives in <Proxy> sections,
16 allowing per backend TLS configuration. [Yann Ylavic]
18 *) core: explicitly exclude 'h2' from protocols announced via an Upgrade:
19 header as commanded by http-wg. [Stefan Eissing]
21 *) http: Respond with "408 Request Timeout" when a timeout occurs while
22 reading the request body. [Yann Ylavic]
24 *) scoreboard/status: Keep workers' previous Client, VHost and Request values
25 when idle, like in 2.4.18 and earlier. [Yann Ylavic]
27 *) mod_proxy_ajp: Add "secret" parameter to proxy workers to implement legacy
28 AJP13 authentication. PR 53098. [Dmitry A. Bakshaev <dab1818 gmail com>]
30 *) mpm_event: Don't take over scoreboard slots from gracefully finishing
31 threads. [Stefan Fritsch]
33 *) mod_status: Display the process slot number in the async connection
34 overview. [Stefan Fritsch]
36 *) mod_include: add the <!--#comment ...> syntax in order to include comments
37 in a SSI file. [Christophe Jaillet based on a suggestion from Rob]
39 *) mpm_event, mpm_worker: Fix computation of MinSpareThreads' lower bound
40 according the number of listeners buckets. [Yann Ylavic]
42 *) mpm: Generalise the ap_mpm_register_socket functions to accept pipes
43 or sockets. [Graham Leggett]
45 *) core: Extend support for setting aside data from the network input filter
46 to any connection or request input filter. [Graham Leggett]
48 *) mod_ssl: Add "no_crl_for_cert_ok" flag to SSLCARevocationCheck directive
49 to opt-in previous behaviour (2.2) with CRLs verification when checking
50 certificate(s) with no corresponding CRL. [Yann Ylavic]
52 *) core: Split ap_create_request() from ap_read_request(). [Graham Leggett]
54 *) ab: Use caseless matching for HTTP tokens (e.g. content-length). PR 59111.
57 *) mod_auth_digest: Fix compatibility with expression-based Authname. PR59039.
60 *) mpm: Add a complete_connection hook that confirms whether an MPM is allowed
61 to leave the WRITE_COMPLETION phase. Move filter code out of the MPMs.
64 *) core: Added support for HTTP code 451. PR58985.
65 [Yehuda Katz <yehuda ymkatz.net>, Jim Jagielski]
67 *) mod_ssl: Add support for OpenSSL 1.1.0. [Rainer Jung]
69 *) mod_filter: Fix AddOutputFilterByType with non-content-level filters.
70 PR58856 [Micha Lenk <micha lenk.info>]
72 *) mod_cache: Consider Cache-Control: s-maxage in expiration
73 calculations. [Eric Covener]
75 *) mod_cache: Allow caching of responses with an Expires header
76 in the past that also has Cache-Control: max-age or s-maxage.
77 PR55156. [Eric Covener]
79 *) mod_proxy_hcheck: Provide for dynamic background health
80 checks on reverse proxies associated with BalancerMember
81 workers. [Jim Jagielski]
83 *) Added many log numbers to log statements that had none.
85 *) mod_session: Introduce SessionExpiryUpdateInterval which allows to
86 configure the session/cookie expiry's update interval. PR 57300.
87 [Paul Spangler <paul.spangler ni.com>]
89 *) core: Extend support for asynchronous write completion from the
90 network filter to any connection or request filter. [Graham Leggett]
92 *) mpm_event: Free memory earlier when shutting down processes.
95 *) mod_auth_digest: remove AuthDigestEnableQueryStringHack which is no
96 more documented since dec 2012 (r1415960). [Christophe Jaillet]
98 *) mod_charset_lite: On EBCDIC platforms, make sure mod_charset_lite runs
99 after other resource-level filters. [Eric Covener]
101 *) mod_dir: Responses that go through "FallbackResource" might appear to
102 hang due to unterminated chunked encoding. PR58292. [Eric Covener]
104 *) http: Don't remove the Content-Length of zero from a HEAD response if
105 it comes from an origin server, module or script. [Yann Ylavic]
107 *) http: Add support for RFC2324/RFC7168. [Graham Leggett]
109 *) mod_rewrite: Add support for starting External Rewriting Programs
110 as non-root user on UNIX systems by specifying username and group name
111 as third argument of RewriteMap directive. [Jan Kaluza]
113 *) mod_authn_core: Add expression support to AuthName and AuthType.
116 *) suexec: Filter out the HTTP_PROXY environment variable because it is
117 treated as alias for http_proxy by some programs. [Stefan Fritsch]
119 *) mod_proxy_http: Don't establish or reuse a backend connection before pre-
120 fetching the request body, so to minimize the delay between it is supposed
121 to be alive and the first bytes sent: this is a best effort to prevent the
122 backend from closing because of idle or keepalive timeout in the meantime.
123 Also, handle a new "proxy-flushall" environment variable which allows to
124 flush any forwarded body data immediately. PR 56541+37920. [Yann Ylavic]
126 *) core: Define and UnDefine are no longer permitted in
127 directory context. Previously they would always be evaulated
128 as the configuration was read without regard for the directory
129 context. [Eric Covener]
131 *) config: For directives that do not expect any arguments, enforce
132 that none are specified in the configuration file.
133 [Joachim Zobel <jzobel heute-morgen.de>, Eric Covener]
135 *) mod_rewrite: Improve 'bad flag delimeters' startup error by showing
136 how the input was tokenized. PR 56528. [Edward Lu <Chaosed0 gmail.com>]
138 *) mod_proxy: Don't put non balancer-member workers in error state by
139 default for connection or 500/503 errors, and honor status=+I for
140 any error. PR 48388. [Yann Ylavic]
142 *) mod_socache_memcache: Pass expiration time through to memcached. PR 55445.
143 [Faidon Liambotis <paravoid debian.org>, Joe Orton]
145 *) ap_expr: Add filemod function for checking file modification dates
148 *) mod_authnz_ldap: Resolve crashes with LDAP authz and non-LDAP authn since
149 r1608202. [Eric Covener]
151 *) apreq: Content-Length header should be always interpreted as a decimal.
152 Leading 0 could be erroneously considered as an octal value. PR 56598.
153 [Chris Card <ctcard hotmail com>]
155 *) mod_proxy: Now allow for 191 character worker names, with non-fatal
156 errors if name is truncated. PR53218. [Jim Jagielski]
158 *) mod_ssl: Add optional function "ssl_get_tls_cb" to allow support
159 for channel bindings. [Simo Sorce <simo redhat.com>]
161 *) mod_proxy_wstunnel: Concurrent websockets messages could be
162 lost or delayed with ProxyWebsocketAsync enabled.
163 [Edward Lu <Chaosed0 gmail.com>]
165 *) core, mod_info: Add compiled and loaded PCRE versions to version
166 number display. [Rainer Jung]
168 *) mod_authnz_ldap: Return LDAP connections to the pool before the handler
169 is run, instead of waiting until the end of the request. [Eric Covener]
171 *) mod_proxy_html: support automatic detection of doctype and processing
172 of FPIs. PR56285 [Micha Lenk <micha lenk info>, Nick Kew]
174 *) mod_proxy_html: skip documents shorter than 4 bytes
175 PR 56286 [Micha Lenk <micha lenk info>]
177 *) mod_proxy_fdpass: Fix computation of the size of 'struct sockaddr_un'
178 when passed to 'connect()'.
179 [Graham Dumpleton <grahamd apache org>]
181 *) core: Add ap_mpm_resume_suspended() API to allow a suspended connection
183 [Artem <artemciy gmail.com>, Edward Lu <Chaosed0 gmail.com>]
185 *) core: Add ap_mpm_register_socket_callback_timeout() API. [Eric Covener]
187 *) mod_proxy_wstunnel: Honor ProxyWebsocketIdleTimeout in asynchronous
188 processing mode. [Eric Covener]
190 *) mod_authnz_ldap: Fail explicitly when the filter is too long. Remove
191 unnecessary apr_pstrdup() and strlen(). [Graham Leggett]
193 *) Add the ldap-search option to mod_authnz_ldap, allowing authorization
194 to be based on arbitrary expressions that do not include the username.
197 *) Add the ldap function to the expression API, allowing LDAP filters and
198 distinguished names based on expressions to be escaped correctly to
199 guard against LDAP injection. [Graham Leggett]
201 *) Add module mod_ssl_ct, which provides an implementation of Certificate
202 Transparency (RFC 6962) for httpd. [Jeff Trawick]
204 *) mod_proxy_wstunnel: Avoid sending error responses down an upgraded
205 websockets connection as it is being close down. [Eric Covener]
207 *) mod_proxy_wstunnel: Allow the administrator to cap the amount
208 of time a synchronous websockets connection stays idle with
209 ProxyWebsocketIdleTimeout. [Eric Covener]
211 *) mod_proxy_wstunnel: Change to opt-in for asynchronous support, adding
212 directives ProxyWebsocketAsync and ProxyWebsocketAsyncDelay.
215 *) mod_proxy_wstunnel: Stop leaking websockets backend connections under
216 event MPM (trunk-only). [Eric Covener]
218 *) mod_proxy_http: Add detach_backend hook (potentially usable
219 in other proxy scheme handlers). [Jeff Trawick]
221 *) mod_deflate: Add DeflateAlterETag to control how the ETag
222 is modified. The 'NoChange' parameter mimics 2.2.x behavior.
223 PR 45023, PR 39727. [Eric Covener]
225 *) mod_rewrite: Add 'BNF' (backreferences-no-plus) flag to RewriteRule to
226 allow spaces in backreferences to be encoded as %20 instead of '+'.
229 *) mod_rewrite: Support an optional list of characters to escape in the
230 argument for the 'B' (escape backreferences) flag. [Eric Covener]
232 *) mod_dir: Default to 2.2-like behavior and skip execution when method is
233 neither GET nor POST, such as for DAV requests. PR 54914. [Chris Darroch]
235 *) mod_rewrite: Rename the handler that does per-directory internal
236 redirects to "rewrite-redirect-handler" from "redirect-handler" so
237 it is less ambiguous and less likely to be reused. [Eric Covener]
239 *) mod_rewrite: Protect against looping with the [N] flag by enforcing a
240 default limit of 10000 iterations, and allowing each rule to change its
241 limit. [Eric Covener]
243 *) mod_ssl: Fix config merging of SSLOCSPEnable and SSLOCSPOverrideResponder.
246 *) Add HttpContentLengthHeadZero and HttpExpectStrict directives.
247 [Yehuda Sadeh <yehuda inktank com>, Justin Erenkrantz]
249 *) mod_ssl: Add -t -DDUMP_CA_CERTS option which dumps the filenames of all
250 configured SSL CA certificates to stdout the same way as DUMP_CERTS does.
253 *) mod_ssl: Don't flush when an EOS is received. Prepares mod_ssl
254 to support write completion. [Graham Leggett]
256 *) core: Add parse_errorlog_arg callback to ap_errorlog_provider
257 to allow providers to check the ErrorLog argument. [Jan Kaluza]
259 *) mod_cgid: Use the servers Timeout for each read from a CGI script,
260 allow override with new CGIDRequestTimeout directive. PR43494
261 [Eric Covener, Toshikuni Fukaya <toshikuni-fukaya cybozu co jp>]
263 *) core: ensure any abnormal exit is reported to stderr if it's a tty.
266 *) mod_lua: Let the Inter-VM get/set functions work with a global
267 shared memory pool instead of a per-process pool. [Daniel Gruno]
269 *) ldap: Support ldaps when using the Microsoft LDAP SDK.
270 PR 54626. [Jean-Frederic Clere]
272 *) mod_authnz_ldap: Change default value of AuthLDAPMaxSubGroupDepth to 0
273 to avoid performance problems when subgroups aren't in use. [Eric Covener]
275 *) mod_syslog: New module implementing syslog ap_error_log provider.
276 Previously, this code was part of core, now it's in separate module.
279 *) core: Add ap_errorlog_provider to make ErrorLog logging modular. Move
280 syslog support from core to new mod_syslog. [Jan Kaluza]
282 *) mod_status, mod_echo: Fix the display of client addresses.
283 They were truncated to 31 characters which is not enough for IPv6 addresses.
284 PR 54848 [Bernhard Schmidt <berni birkenwald de>]
286 *) mod_unique_id: Use output of the PRNG rather than IP address and
287 pid, avoiding sleep() call and possible DNS issues at startup,
288 plus improving randomness for IPv6-only hosts.
289 [Jan Kaluza <jkaluza redhat.com>]
291 *) mod_file_cache: mod_file_cache should be able to serve files that
292 haven't had a Content-Type set via e.g. mod_mime. [Eric Covener]
294 *) core: merge AllowEncodedSlashes from the base configuration into
295 virtual hosts. [Eric Covener]
297 *) AIX: Install DSO's with "cp" instead of "install" in instdso.sh
300 *) mod_ldap: Don't keep retrying if a new LDAP connection times out.
303 *) mod_deflate: permit compilation of mod_deflate against a zlib that has
304 been configured with -D Z_PREFIX, which redefines the token "deflate".
307 *) mod_auth_digest: Use the secret when generating nonces in all cases and
308 not only when AuthName is used in .htaccess files (this change may cause
309 problems if used with round robin load balancers). Don't regenerate the
310 secret on graceful restarts. PR 54637 [Stefan Fritsch]
312 *) core: Remove apr_brigade_flatten(), buffering and duplicated code
313 from the HTTP_IN filter, parse chunks in a single pass with zero copy.
314 Reduce memory usage by 48 bytes per request. [Graham Leggett]
316 *) core: Stop the HTTP_IN filter from attempting to write error buckets
317 to the output filters, which is bogus in the proxy case. Create a
318 clean mapping from APR codes to HTTP status codes, and use it where
319 needed. [Graham Leggett]
321 *) mod_proxy: Ensure network errors detected by the proxy are returned as
322 504 Gateway Timout as opposed to 502 Bad Gateway, in order to be
323 compliant with RFC2616 14.9.4 Cache Revalidation and Reload Controls.
325 *) mod_dav: mod_dav overrides dav_fs response on PUT failure. PR 35981
326 [Basant Kumar Kukreja <basant.kukreja sun.com>, Alejandro Alvarez
327 <alejandro.alvarez.ayllon cern.ch>]
329 *) mod_ldap: LDAP connections used for authentication were not respecting
330 LDAPConnectionPoolTimeout. PR 54587
332 *) core: ap_rgetline_core now pulls from r->proto_input_filters.
334 *) mod_proxy_html: process parsed comments immediately.
335 Fixes bug where parsed comments may be lost. [Nick Kew]
337 *) mod_proxy_html: introduce doctype for HTML 5 [Nick Kew]
339 *) mod_proxy_html: fix typo-bug processing "strict" vs "transitional"
340 HTML/XHTML [Nick Kew]
342 *) core: Add option to add valgrind support. Use it to reduce false positive
343 warnings in mod_ssl. [Stefan Fritsch]
345 *) mod_authn_file, mod_authn_dbd, mod_authn_dbm, mod_authn_socache:
346 Cache the result of the most recent password hash verification for every
347 keep-alive connection. This saves some expensive calculations.
350 *) http: Remove support for Request-Range header sent by Navigator 2-3 and
351 MSIE 3. [Stefan Fritsch]
353 *) core, http: Extend HttpProtocol with an option to enforce stricter HTTP
354 conformance or to only log the found problems. [Stefan Fritsch]
356 *) core: Correctly parse an IPv6 literal host specification in an absolute
357 URL in the request line. [Stefan Fritsch]
361 *) core: Add LogLevelOverride directive that allows to override the
362 loglevel for clients from certain IPs. This also works for things
363 like the SSL handshake where <If> LogLevel ... </If> is evaluated
364 too late. [Stefan Fritsch]
366 *) core: Add new directive Warning to issue warnings from a configuration
367 file. Both Warning and Error now generate a timestamped log message.
370 *) ap_expr: Add SERVER_PROTOCOL_VERSION, ..._MAJOR, and ..._MINOR
371 variables. [Stefan Fritsch]
373 *) core: New directive RegisterHttpMethod for registering non-standard
374 HTTP methods. [Stefan Fritsch]
376 *) core: New directive HttpProtocol which allows to disable HTTP/0.9
377 support. [Stefan Fritsch]
379 *) mod_allowhandlers: New module to forbid specific handlers for specific
380 directories. [Stefan Fritsch]
382 *) mod_systemd: New module, for integration with systemd on Linux.
383 [Jan Kaluza <jkaluza redhat.com>]
385 *) WinNT MPM: Store pid and generation for each thread in scoreboard
386 to allow tracking of threads from exiting children via mod_status
387 or other such mechanisms. [Jeff Trawick]
389 *) The following now respect DefaultRuntimeDir/DEFAULT_REL_RUNTIMEDIR:
390 - APIs: ap_log_pid(), ap_remove_pid, ap_read_pid()
391 - mod_cache: thundering herd lock directory
392 - mod_lbmethod_heartbeat, mod_heartmonitor: heartbeat storage file
393 - mod_ldap: shared memory cache
394 - mod_socache_shmcb, mod_socache_dbm: shared memory or dbm for cache
397 *) suexec: Add --enable-suexec-capabilites support on Linux, to use
398 setuid/setgid capability bits rather than a setuid root binary.
401 *) suexec: Add support for logging to syslog as an alternative to logging
402 to a file; configure --without-suexec-logfile --with-suexec-syslog.
405 *) mod_ssl: Add support for TLS Next Protocol Negotiation. PR 52210.
406 [Matthew Steele <mdsteele google.com>]
408 *) cross-compile: allow to provide CC_FOR_BUILD so that gen_test_char will
409 be compiled by the build compiler instead of the host compiler.
410 Also set CC_FOR_BUILD to 'cc' when cross-compilation is detected.
411 PR 51257. [Guenter Knauf]
413 *) core: In maintainer mode, replace apr_palloc with a version that
414 initializes the allocated memory with non-zero values, except if
415 AP_DEBUG_NO_ALLOC_POISON is defined. [Stefan Fritsch]
417 *) mod_policy: Add a new testing module to help server administrators
418 enforce a configurable level of protocol compliance on their
419 servers and application servers behind theirs. [Graham Leggett]
421 *) mod_firehose: Add a new debugging module able to record traffic
422 passing through the server in such a way that connections and/or
423 requests be reconstructed and replayed. [Graham Leggett]
433 [Apache 2.5.0-dev includes those bug fixes and changes with the
434 Apache 2.4.xx tree as documented below, except as noted.]
436 Changes with Apache 2.4.x and later:
438 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/CHANGES?view=markup
440 Changes with Apache 2.2.x and later:
442 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.2.x/CHANGES?view=markup
444 Changes with Apache 2.0.x and later:
446 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.0.x/CHANGES?view=markup