2 Changes with Apache 2.5.0
4 *) mod_http2: new r->subprocess_env variables HTTP2 and H2PUSH, set to "on"
5 when available for request.
8 *) mod_http2: adding new config directives and the implementation behind
9 them: H2Timeout, H2KeepAliveTimeout, H2StreamTimeout. Documentation in
13 *) mod_http2: when running in async mpm processing, mod_http2 will cease
14 processing on idle connections (e.g. no open streams) back to the mpm.
17 *) mod_http2: fixed bug in input window size calculation by moving chunked
18 request body encoding into later stage of processing.
21 *) mod_proxy_fdpass: Fix AH01153 error when using the default configuration.
22 In earlier version of httpd, you can explicitelly set the 'flusher' parameter
23 to 'flush' as a workaround. (i.e. flusher=flush)
24 Add documentation for the 'flusher' parameter when defining a proxy worker.
27 *) mod_ssl: For the "SSLStaplingReturnResponderErrors off" case, make sure
28 to only staple responses with certificate status "good". [Kaspar Brand]
30 *) core: Limit to ten the number of tolerated empty lines between request,
31 and consume them before the pipelining check to avoid possible response
32 delay when reading the next request without flushing. [Yann Ylavic]
34 *) mod_session: Introduce SessionExpiryUpdateInterval which allows to
35 configure the session/cookie expiry's update interval. PR 57300.
36 [Paul Spangler <paul.spangler ni.com>]
38 *) core: Extend support for asynchronous write completion from the
39 network filter to any connection or request filter. [Graham Leggett]
41 *) mpm_event: Free memory earlier when shutting down processes.
44 *) mod_ssl: Make the output filter more friendly with deferred write and
45 response pipelining. [Yann Ylavic, Joe Orton]
47 *) core/util_script: relax alphanumeric filter of environment variable names
48 on Windows to allow '(' and ')' for passing PROGRAMFILES(X86) et.al.
49 unadulterated in 64 bit versions of Windows. PR 46751.
50 [John <john leineweb de>]
52 *) mod_auth_digest: remove AuthDigestEnableQueryStringHack which is no
53 more documented since dec 2012 (r1415960). [Christophe Jaillet]
55 *) mod_charset_lite: On EBCDIC platforms, make sure mod_charset_lite runs
56 after other resource-level filters. [Eric Covener]
58 *) mod_dir: Responses that go through "FallbackResource" might appear to
59 hang due to unterminated chunked encoding. PR58292. [Eric Covener]
61 *) mod_alias: Limit Redirect expressions to directory (Location) context
62 and redirect statuses (implicit or explicit).
63 [Yann Ylavic, Ruediger Pluem]
65 *) mod_substitute: Fix configuraton merge order.
66 PR 57641 [<Marc.Stern approach.be>]
68 *) mod_ssl: When SSLVerify is disabled (NONE), don't force a renegotiation if
69 the SSLVerifyDepth applied with the default/handshaken vhost differs from
70 the one applicable with the finally selected vhost. [Yann Ylavic]
72 *) http: Don't remove the Content-Length of zero from a HEAD response if
73 it comes from an origin server, module or script. [Yann Ylavic]
75 *) http: Add support for RFC2324/RFC7168. [Graham Leggett]
77 *) mod_rewrite: Add support for starting External Rewriting Programs
78 as non-root user on UNIX systems by specifying username and group name
79 as third argument of RewriteMap directive. [Jan Kaluza]
81 *) mod_authn_core: Add expression support to AuthName and AuthType.
84 *) suexec: Filter out the HTTP_PROXY environment variable because it is
85 treated as alias for http_proxy by some programs. [Stefan Fritsch]
87 *) mod_proxy_http: Don't establish or reuse a backend connection before pre-
88 fetching the request body, so to minimize the delay between it is supposed
89 to be alive and the first bytes sent: this is a best effort to prevent the
90 backend from closing because of idle or keepalive timeout in the meantime.
91 Also, handle a new "proxy-flushall" environment variable which allows to
92 flush any forwarded body data immediately. PR 56541+37920. [Yann Ylavic]
94 *) core: Define and UnDefine are no longer permitted in
95 directory context. Previously they would always be evaulated
96 as the configuration was read without regard for the directory
97 context. [Eric Covener]
99 *) config: For directives that do not expect any arguments, enforce
100 that none are specified in the configuration file.
101 [Joachim Zobel <jzobel heute-morgen.de>, Eric Covener]
103 *) mod_rewrite: Improve 'bad flag delimeters' startup error by showing
104 how the input was tokenized. PR 56528. [Edward Lu <Chaosed0 gmail.com>]
106 *) mod_proxy: Don't put non balancer-member workers in error state by
107 default for connection or 500/503 errors, and honor status=+I for
108 any error. PR 48388. [Yann Ylavic]
110 *) mod_socache_memcache: Pass expiration time through to memcached. PR 55445.
111 [Faidon Liambotis <paravoid debian.org>, Joe Orton]
113 *) ap_expr: Add filemod function for checking file modification dates
116 *) mod_authnz_ldap: Resolve crashes with LDAP authz and non-LDAP authn since
117 r1608202. [Eric Covener]
119 *) core: Ensure that httpd exits with an error status when the MPM fails
120 to run. [Yann Ylavic]
122 *) apreq: Content-Length header should be always interpreted as a decimal.
123 Leading 0 could be erroneously considered as an octal value. PR 56598.
124 [Chris Card <ctcard hotmail com>]
126 *) mod_proxy: Now allow for 191 character worker names, with non-fatal
127 errors if name is truncated. PR53218. [Jim Jagielski]
129 *) mod_ssl: Add optional function "ssl_get_tls_cb" to allow support
130 for channel bindings. [Simo Sorce <simo redhat.com>]
132 *) mod_proxy_wstunnel: Concurrent websockets messages could be
133 lost or delayed with ProxyWebsocketAsync enabled.
134 [Edward Lu <Chaosed0 gmail.com>]
136 *) core, mod_info: Add compiled and loaded PCRE versions to version
137 number display. [Rainer Jung]
139 *) mod_authnz_ldap: Return LDAP connections to the pool before the handler
140 is run, instead of waiting until the end of the request. [Eric Covener]
142 *) mod_log_config: Add GlobalLog to allow a globally defined log to
143 be inherited by virtual hosts that define a CustomLog.
144 [Edward Lu <Chaosed0 gmail.com>]
146 *) mod_proxy_html: support automatic detection of doctype and processing
147 of FPIs. PR56285 [Micha Lenk <micha lenk info>, Nick Kew]
149 *) mod_proxy_html: skip documents shorter than 4 bytes
150 PR 56286 [Micha Lenk <micha lenk info>]
152 *) mod_proxy_fdpass: Fix computation of the size of 'struct sockaddr_un'
153 when passed to 'connect()'.
154 [Graham Dumpleton <grahamd apache org>]
156 *) core: Add ap_mpm_resume_suspended() API to allow a suspended connection
158 [Artem <artemciy gmail.com>, Edward Lu <Chaosed0 gmail.com>]
160 *) core: Add ap_mpm_register_socket_callback_timeout() API. [Eric Covener]
162 *) mod_proxy_wstunnel: Honor ProxyWebsocketIdleTimeout in asynchronous
163 processing mode. [Eric Covener]
165 *) mod_authnz_ldap: Fail explicitly when the filter is too long. Remove
166 unnecessary apr_pstrdup() and strlen(). [Graham Leggett]
168 *) Add the ldap-search option to mod_authnz_ldap, allowing authorization
169 to be based on arbitrary expressions that do not include the username.
172 *) Add the ldap function to the expression API, allowing LDAP filters and
173 distinguished names based on expressions to be escaped correctly to
174 guard against LDAP injection. [Graham Leggett]
176 *) Add module mod_ssl_ct, which provides an implementation of Certificate
177 Transparency (RFC 6962) for httpd. [Jeff Trawick]
179 *) mod_remoteip: Prevent an external proxy from presenting an internal
180 proxy. PR 55962. [Mike Rumph]
182 *) mod_ssl: Add hooks to allow other modules to perform processing at
183 several stages of initialization and connection handling. See
184 mod_ssl_openssl.h. [Jeff Trawick]
186 *) mod_proxy_wstunnel: Avoid sending error responses down an upgraded
187 websockets connection as it is being close down. [Eric Covener]
189 *) mod_proxy_wstunnel: Allow the administrator to cap the amount
190 of time a synchronous websockets connection stays idle with
191 ProxyWebsocketIdleTimeout. [Eric Covener]
193 *) mod_proxy_wstunnel: Change to opt-in for asynchronous support, adding
194 directives ProxyWebsocketAsync and ProxyWebsocketAsyncDelay.
197 *) mod_proxy_wstunnel: Stop leaking websockets backend connections under
198 event MPM (trunk-only). [Eric Covener]
200 *) mod_proxy_http: Add detach_backend hook (potentially usable
201 in other proxy scheme handlers). [Jeff Trawick]
203 *) mod_deflate: Add DeflateAlterETag to control how the ETag
204 is modified. The 'NoChange' parameter mimics 2.2.x behavior.
205 PR 45023, PR 39727. [Eric Covener]
207 *) mod_rewrite: Add 'BNF' (backreferences-no-plus) flag to RewriteRule to
208 allow spaces in backreferences to be encoded as %20 instead of '+'.
211 *) mod_rewrite: Support an optional list of characters to escape in the
212 argument for the 'B' (escape backreferences) flag. [Eric Covener]
214 *) mod_dir: Default to 2.2-like behavior and skip execution when method is
215 neither GET nor POST, such as for DAV requests. PR 54914. [Chris Darroch]
217 *) mod_rewrite: Rename the handler that does per-directory internal
218 redirects to "rewrite-redirect-handler" from "redirect-handler" so
219 it is less ambiguous and less likely to be reused. [Eric Covener]
221 *) mod_rewrite: Protect against looping with the [N] flag by enforcing a
222 default limit of 10000 iterations, and allowing each rule to change its
223 limit. [Eric Covener]
225 *) mod_ssl: Fix config merging of SSLOCSPEnable and SSLOCSPOverrideResponder.
228 *) Add HttpContentLengthHeadZero and HttpExpectStrict directives.
229 [Yehuda Sadeh <yehuda inktank com>, Justin Erenkrantz]
231 *) mod_ssl: Add -t -DDUMP_CA_CERTS option which dumps the filenames of all
232 configured SSL CA certificates to stdout the same way as DUMP_CERTS does.
235 *) mod_ssl: Don't flush when an EOS is received. Prepares mod_ssl
236 to support write completion. [Graham Leggett]
238 *) core: Add parse_errorlog_arg callback to ap_errorlog_provider
239 to allow providers to check the ErrorLog argument. [Jan Kaluza]
241 *) mod_cgid: Use the servers Timeout for each read from a CGI script,
242 allow override with new CGIDRequestTimeout directive. PR43494
243 [Eric Covener, Toshikuni Fukaya <toshikuni-fukaya cybozu co jp>]
245 *) core: ensure any abnormal exit is reported to stderr if it's a tty.
248 *) mod_lua: Let the Inter-VM get/set functions work with a global
249 shared memory pool instead of a per-process pool. [Daniel Gruno]
251 *) ldap: Support ldaps when using the Microsoft LDAP SDK.
252 PR 54626. [Jean-Frederic Clere]
254 *) mod_authnz_ldap: Change default value of AuthLDAPMaxSubGroupDepth to 0
255 to avoid performance problems when subgroups aren't in use. [Eric Covener]
257 *) mod_syslog: New module implementing syslog ap_error_log provider.
258 Previously, this code was part of core, now it's in separate module.
261 *) core: Add ap_errorlog_provider to make ErrorLog logging modular. Move
262 syslog support from core to new mod_syslog. [Jan Kaluza]
264 *) mod_status, mod_echo: Fix the display of client addresses.
265 They were truncated to 31 characters which is not enough for IPv6 addresses.
266 PR 54848 [Bernhard Schmidt <berni birkenwald de>]
268 *) mod_unique_id: Use output of the PRNG rather than IP address and
269 pid, avoiding sleep() call and possible DNS issues at startup,
270 plus improving randomness for IPv6-only hosts.
271 [Jan Kaluza <jkaluza redhat.com>]
273 *) mod_file_cache: mod_file_cache should be able to serve files that
274 haven't had a Content-Type set via e.g. mod_mime. [Eric Covener]
276 *) core: merge AllowEncodedSlashes from the base configuration into
277 virtual hosts. [Eric Covener]
279 *) AIX: Install DSO's with "cp" instead of "install" in instdso.sh
282 *) mod_ldap: Don't keep retrying if a new LDAP connection times out.
285 *) mod_deflate: permit compilation of mod_deflate against a zlib that has
286 been configured with -D Z_PREFIX, which redefines the token "deflate".
289 *) mod_auth_digest: Use the secret when generating nonces in all cases and
290 not only when AuthName is used in .htaccess files (this change may cause
291 problems if used with round robin load balancers). Don't regenerate the
292 secret on graceful restarts. PR 54637 [Stefan Fritsch]
294 *) core: Remove apr_brigade_flatten(), buffering and duplicated code
295 from the HTTP_IN filter, parse chunks in a single pass with zero copy.
296 Reduce memory usage by 48 bytes per request. [Graham Leggett]
298 *) core: Stop the HTTP_IN filter from attempting to write error buckets
299 to the output filters, which is bogus in the proxy case. Create a
300 clean mapping from APR codes to HTTP status codes, and use it where
301 needed. [Graham Leggett]
303 *) mod_proxy: Ensure network errors detected by the proxy are returned as
304 504 Gateway Timout as opposed to 502 Bad Gateway, in order to be
305 compliant with RFC2616 14.9.4 Cache Revalidation and Reload Controls.
307 *) mod_dav: mod_dav overrides dav_fs response on PUT failure. PR 35981
308 [Basant Kumar Kukreja <basant.kukreja sun.com>, Alejandro Alvarez
309 <alejandro.alvarez.ayllon cern.ch>]
311 *) mod_ldap: LDAP connections used for authentication were not respecting
312 LDAPConnectionPoolTimeout. PR 54587
314 *) core: ap_rgetline_core now pulls from r->proto_input_filters.
316 *) mod_proxy_html: process parsed comments immediately.
317 Fixes bug where parsed comments may be lost. [Nick Kew]
319 *) mod_proxy_html: introduce doctype for HTML 5 [Nick Kew]
321 *) mod_proxy_html: fix typo-bug processing "strict" vs "transitional"
322 HTML/XHTML [Nick Kew]
324 *) core: Add option to add valgrind support. Use it to reduce false positive
325 warnings in mod_ssl. [Stefan Fritsch]
327 *) mod_authn_file, mod_authn_dbd, mod_authn_dbm, mod_authn_socache:
328 Cache the result of the most recent password hash verification for every
329 keep-alive connection. This saves some expensive calculations.
332 *) http: Remove support for Request-Range header sent by Navigator 2-3 and
333 MSIE 3. [Stefan Fritsch]
335 *) core, http: Extend HttpProtocol with an option to enforce stricter HTTP
336 conformance or to only log the found problems. [Stefan Fritsch]
338 *) core: Correctly parse an IPv6 literal host specification in an absolute
339 URL in the request line. [Stefan Fritsch]
343 *) core: Add LogLevelOverride directive that allows to override the
344 loglevel for clients from certain IPs. This also works for things
345 like the SSL handshake where <If> LogLevel ... </If> is evaluated
346 too late. [Stefan Fritsch]
348 *) core: Add new directive Warning to issue warnings from a configuration
349 file. Both Warning and Error now generate a timestamped log message.
352 *) ap_expr: Add SERVER_PROTOCOL_VERSION, ..._MAJOR, and ..._MINOR
353 variables. [Stefan Fritsch]
355 *) core: New directive RegisterHttpMethod for registering non-standard
356 HTTP methods. [Stefan Fritsch]
358 *) core: New directive HttpProtocol which allows to disable HTTP/0.9
359 support. [Stefan Fritsch]
361 *) mod_allowhandlers: New module to forbid specific handlers for specific
362 directories. [Stefan Fritsch]
364 *) mod_systemd: New module, for integration with systemd on Linux.
365 [Jan Kaluza <jkaluza redhat.com>]
367 *) WinNT MPM: Store pid and generation for each thread in scoreboard
368 to allow tracking of threads from exiting children via mod_status
369 or other such mechanisms. [Jeff Trawick]
371 *) The following now respect DefaultRuntimeDir/DEFAULT_REL_RUNTIMEDIR:
372 - APIs: ap_log_pid(), ap_remove_pid, ap_read_pid()
373 - mod_cache: thundering herd lock directory
374 - mod_lbmethod_heartbeat, mod_heartmonitor: heartbeat storage file
375 - mod_ldap: shared memory cache
376 - mod_socache_shmcb, mod_socache_dbm: shared memory or dbm for cache
379 *) suexec: Add --enable-suexec-capabilites support on Linux, to use
380 setuid/setgid capability bits rather than a setuid root binary.
383 *) suexec: Add support for logging to syslog as an alternative to logging
384 to a file; configure --without-suexec-logfile --with-suexec-syslog.
387 *) mod_ssl: Add support for TLS Next Protocol Negotiation. PR 52210.
388 [Matthew Steele <mdsteele google.com>]
390 *) cross-compile: allow to provide CC_FOR_BUILD so that gen_test_char will
391 be compiled by the build compiler instead of the host compiler.
392 Also set CC_FOR_BUILD to 'cc' when cross-compilation is detected.
393 PR 51257. [Guenter Knauf]
395 *) core: In maintainer mode, replace apr_palloc with a version that
396 initializes the allocated memory with non-zero values, except if
397 AP_DEBUG_NO_ALLOC_POISON is defined. [Stefan Fritsch]
399 *) mod_policy: Add a new testing module to help server administrators
400 enforce a configurable level of protocol compliance on their
401 servers and application servers behind theirs. [Graham Leggett]
403 *) mod_firehose: Add a new debugging module able to record traffic
404 passing through the server in such a way that connections and/or
405 requests be reconstructed and replayed. [Graham Leggett]
415 [Apache 2.5.0-dev includes those bug fixes and changes with the
416 Apache 2.4.xx tree as documented below, except as noted.]
418 Changes with Apache 2.4.x and later:
420 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/CHANGES?view=markup
422 Changes with Apache 2.2.x and later:
424 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.2.x/CHANGES?view=markup
426 Changes with Apache 2.0.x and later:
428 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.0.x/CHANGES?view=markup