2 Changes with Apache 2.5.0
4 *) mod_cache: Accept HT (Horizontal Tab) when parsing cache related header
5 fields as described in RFC2616. [Christophe Jaillet]
7 *) htpasswd/htdigest: Disable support for bcrypt on EBCDIC platforms.
8 apr-util's bcrypt implementation doesn't tolerate EBCDIC.
10 *) core: Make PR57785 REDIRECT_URL fix opt-in with directive
11 QualifyRedirectURL. [Eric Covener]
13 *) core: add ap_get_protocol_upgrades() to retrieve the list of protocols
14 that a client could possibly upgrade to. Use in first request on a
15 connection to announce protocol choices.
18 *) mod_http2: reworked deallocation on connection shutdown and worker
19 abort. Separate parent pool for all workers. worker threads are joined
20 on planned worker shutdown.
21 [Yann Ylavic, Stefan Eissing]
23 *) mod_ssl: when receiving requests for other virtual hosts than the handshake
24 server, the SSL parameters are checked for equality. With equal
25 configuration, requests are passed for processing. Any change will trigger
26 the old behaviour of "421 Misdirected Request".
27 SSL now remembers the cipher suite that was used for the last handshake.
28 This is compared against for any vhost/directory cipher specification.
29 Detailed examination of renegotiation is only done when these do not
31 Renegotiation is 403ed when a master connection is present. Exact reason
32 is given additionally in a request note.
35 *) core: Limit to ten the number of tolerated empty lines between request,
36 and consume them before the pipelining check to avoid possible response
37 delay when reading the next request without flushing. [Yann Ylavic]
39 *) mod_session: Introduce SessionExpiryUpdateInterval which allows to
40 configure the session/cookie expiry's update interval. PR 57300.
41 [Paul Spangler <paul.spangler ni.com>]
43 *) core: Extend support for asynchronous write completion from the
44 network filter to any connection or request filter. [Graham Leggett]
46 *) mpm_event: Free memory earlier when shutting down processes.
49 *) mod_ssl: Make the output filter more friendly with deferred write and
50 response pipelining. [Yann Ylavic, Joe Orton]
52 *) core/util_script: relax alphanumeric filter of environment variable names
53 on Windows to allow '(' and ')' for passing PROGRAMFILES(X86) et.al.
54 unadulterated in 64 bit versions of Windows. PR 46751.
55 [John <john leineweb de>]
57 *) mod_auth_digest: remove AuthDigestEnableQueryStringHack which is no
58 more documented since dec 2012 (r1415960). [Christophe Jaillet]
60 *) mod_charset_lite: On EBCDIC platforms, make sure mod_charset_lite runs
61 after other resource-level filters. [Eric Covener]
63 *) mod_dir: Responses that go through "FallbackResource" might appear to
64 hang due to unterminated chunked encoding. PR58292. [Eric Covener]
66 *) mod_alias: Limit Redirect expressions to directory (Location) context
67 and redirect statuses (implicit or explicit).
68 [Yann Ylavic, Ruediger Pluem]
70 *) mod_substitute: Fix configuraton merge order.
71 PR 57641 [<Marc.Stern approach.be>]
73 *) mod_ssl: When SSLVerify is disabled (NONE), don't force a renegotiation if
74 the SSLVerifyDepth applied with the default/handshaken vhost differs from
75 the one applicable with the finally selected vhost. [Yann Ylavic]
77 *) mod_ssl: add ALPN support by allowing other modules to register callbacks
78 for negotiation of the application layer protocol. PR 52210.
79 [Matthew Steele <mdsteele google com>, Joe Orton, Jim Jagielski,
80 Stefan Eissing <stefan eissing org>, Rainer Jung, Ruediger Pluem,
83 *) http: Don't remove the Content-Length of zero from a HEAD response if
84 it comes from an origin server, module or script. [Yann Ylavic]
86 *) http: Add support for RFC2324/RFC7168. [Graham Leggett]
88 *) mod_rewrite: Add support for starting External Rewriting Programs
89 as non-root user on UNIX systems by specifying username and group name
90 as third argument of RewriteMap directive. [Jan Kaluza]
92 *) mod_authn_core: Add expression support to AuthName and AuthType.
95 *) suexec: Filter out the HTTP_PROXY environment variable because it is
96 treated as alias for http_proxy by some programs. [Stefan Fritsch]
98 *) mod_proxy_http: Don't establish or reuse a backend connection before pre-
99 fetching the request body, so to minimize the delay between it is supposed
100 to be alive and the first bytes sent: this is a best effort to prevent the
101 backend from closing because of idle or keepalive timeout in the meantime.
102 Also, handle a new "proxy-flushall" environment variable which allows to
103 flush any forwarded body data immediately. PR 56541+37920. [Yann Ylavic]
105 *) core: Define and UnDefine are no longer permitted in
106 directory context. Previously they would always be evaulated
107 as the configuration was read without regard for the directory
108 context. [Eric Covener]
110 *) config: For directives that do not expect any arguments, enforce
111 that none are specified in the configuration file.
112 [Joachim Zobel <jzobel heute-morgen.de>, Eric Covener]
114 *) mod_rewrite: Improve 'bad flag delimeters' startup error by showing
115 how the input was tokenized. PR 56528. [Edward Lu <Chaosed0 gmail.com>]
117 *) mod_proxy: Don't put non balancer-member workers in error state by
118 default for connection or 500/503 errors, and honor status=+I for
119 any error. PR 48388. [Yann Ylavic]
121 *) mod_socache_memcache: Pass expiration time through to memcached. PR 55445.
122 [Faidon Liambotis <paravoid debian.org>, Joe Orton]
124 *) ap_expr: Add filemod function for checking file modification dates
127 *) mod_authnz_ldap: Resolve crashes with LDAP authz and non-LDAP authn since
128 r1608202. [Eric Covener]
130 *) core: Ensure that httpd exits with an error status when the MPM fails
131 to run. [Yann Ylavic]
133 *) apreq: Content-Length header should be always interpreted as a decimal.
134 Leading 0 could be erroneously considered as an octal value. PR 56598.
135 [Chris Card <ctcard hotmail com>]
137 *) mod_proxy: Now allow for 191 character worker names, with non-fatal
138 errors if name is truncated. PR53218. [Jim Jagielski]
140 *) mod_ssl: Add optional function "ssl_get_tls_cb" to allow support
141 for channel bindings. [Simo Sorce <simo redhat.com>]
143 *) mod_proxy_wstunnel: Concurrent websockets messages could be
144 lost or delayed with ProxyWebsocketAsync enabled.
145 [Edward Lu <Chaosed0 gmail.com>]
147 *) core, mod_info: Add compiled and loaded PCRE versions to version
148 number display. [Rainer Jung]
150 *) mod_authnz_ldap: Return LDAP connections to the pool before the handler
151 is run, instead of waiting until the end of the request. [Eric Covener]
153 *) mod_log_config: Add GlobalLog to allow a globally defined log to
154 be inherited by virtual hosts that define a CustomLog.
155 [Edward Lu <Chaosed0 gmail.com>]
157 *) mod_proxy_html: support automatic detection of doctype and processing
158 of FPIs. PR56285 [Micha Lenk <micha lenk info>, Nick Kew]
160 *) mod_proxy_html: skip documents shorter than 4 bytes
161 PR 56286 [Micha Lenk <micha lenk info>]
163 *) mod_proxy_fdpass: Fix computation of the size of 'struct sockaddr_un'
164 when passed to 'connect()'.
165 [Graham Dumpleton <grahamd apache org>]
167 *) core: Add ap_mpm_resume_suspended() API to allow a suspended connection
169 [Artem <artemciy gmail.com>, Edward Lu <Chaosed0 gmail.com>]
171 *) core: Add ap_mpm_register_socket_callback_timeout() API. [Eric Covener]
173 *) mod_proxy_wstunnel: Honor ProxyWebsocketIdleTimeout in asynchronous
174 processing mode. [Eric Covener]
176 *) mod_authnz_ldap: Fail explicitly when the filter is too long. Remove
177 unnecessary apr_pstrdup() and strlen(). [Graham Leggett]
179 *) Add the ldap-search option to mod_authnz_ldap, allowing authorization
180 to be based on arbitrary expressions that do not include the username.
183 *) Add the ldap function to the expression API, allowing LDAP filters and
184 distinguished names based on expressions to be escaped correctly to
185 guard against LDAP injection. [Graham Leggett]
187 *) Add module mod_ssl_ct, which provides an implementation of Certificate
188 Transparency (RFC 6962) for httpd. [Jeff Trawick]
190 *) mod_remoteip: Prevent an external proxy from presenting an internal
191 proxy. PR 55962. [Mike Rumph]
193 *) mod_ssl: Add hooks to allow other modules to perform processing at
194 several stages of initialization and connection handling. See
195 mod_ssl_openssl.h. [Jeff Trawick]
197 *) mod_proxy_wstunnel: Avoid sending error responses down an upgraded
198 websockets connection as it is being close down. [Eric Covener]
200 *) mod_proxy_wstunnel: Allow the administrator to cap the amount
201 of time a synchronous websockets connection stays idle with
202 ProxyWebsocketIdleTimeout. [Eric Covener]
204 *) mod_proxy_wstunnel: Change to opt-in for asynchronous support, adding
205 directives ProxyWebsocketAsync and ProxyWebsocketAsyncDelay.
208 *) mod_proxy_wstunnel: Stop leaking websockets backend connections under
209 event MPM (trunk-only). [Eric Covener]
211 *) mod_proxy_http: Add detach_backend hook (potentially usable
212 in other proxy scheme handlers). [Jeff Trawick]
214 *) mod_deflate: Add DeflateAlterETag to control how the ETag
215 is modified. The 'NoChange' parameter mimics 2.2.x behavior.
216 PR 45023, PR 39727. [Eric Covener]
218 *) mod_rewrite: Add 'BNF' (backreferences-no-plus) flag to RewriteRule to
219 allow spaces in backreferences to be encoded as %20 instead of '+'.
222 *) mod_rewrite: Support an optional list of characters to escape in the
223 argument for the 'B' (escape backreferences) flag. [Eric Covener]
225 *) mod_dir: Default to 2.2-like behavior and skip execution when method is
226 neither GET nor POST, such as for DAV requests. PR 54914. [Chris Darroch]
228 *) mod_rewrite: Rename the handler that does per-directory internal
229 redirects to "rewrite-redirect-handler" from "redirect-handler" so
230 it is less ambiguous and less likely to be reused. [Eric Covener]
232 *) mod_rewrite: Protect against looping with the [N] flag by enforcing a
233 default limit of 10000 iterations, and allowing each rule to change its
234 limit. [Eric Covener]
236 *) mod_ssl: Fix config merging of SSLOCSPEnable and SSLOCSPOverrideResponder.
239 *) Add HttpContentLengthHeadZero and HttpExpectStrict directives.
240 [Yehuda Sadeh <yehuda inktank com>, Justin Erenkrantz]
242 *) mod_ssl: Add -t -DDUMP_CA_CERTS option which dumps the filenames of all
243 configured SSL CA certificates to stdout the same way as DUMP_CERTS does.
246 *) mod_ssl: Don't flush when an EOS is received. Prepares mod_ssl
247 to support write completion. [Graham Leggett]
249 *) core: Add parse_errorlog_arg callback to ap_errorlog_provider
250 to allow providers to check the ErrorLog argument. [Jan Kaluza]
252 *) mod_cgid: Use the servers Timeout for each read from a CGI script,
253 allow override with new CGIDRequestTimeout directive. PR43494
254 [Eric Covener, Toshikuni Fukaya <toshikuni-fukaya cybozu co jp>]
256 *) core: ensure any abnormal exit is reported to stderr if it's a tty.
259 *) mod_lua: Let the Inter-VM get/set functions work with a global
260 shared memory pool instead of a per-process pool. [Daniel Gruno]
262 *) ldap: Support ldaps when using the Microsoft LDAP SDK.
263 PR 54626. [Jean-Frederic Clere]
265 *) mod_authnz_ldap: Change default value of AuthLDAPMaxSubGroupDepth to 0
266 to avoid performance problems when subgroups aren't in use. [Eric Covener]
268 *) mod_syslog: New module implementing syslog ap_error_log provider.
269 Previously, this code was part of core, now it's in separate module.
272 *) core: Add ap_errorlog_provider to make ErrorLog logging modular. Move
273 syslog support from core to new mod_syslog. [Jan Kaluza]
275 *) mod_status, mod_echo: Fix the display of client addresses.
276 They were truncated to 31 characters which is not enough for IPv6 addresses.
277 PR 54848 [Bernhard Schmidt <berni birkenwald de>]
279 *) mod_unique_id: Use output of the PRNG rather than IP address and
280 pid, avoiding sleep() call and possible DNS issues at startup,
281 plus improving randomness for IPv6-only hosts.
282 [Jan Kaluza <jkaluza redhat.com>]
284 *) mod_file_cache: mod_file_cache should be able to serve files that
285 haven't had a Content-Type set via e.g. mod_mime. [Eric Covener]
287 *) core: merge AllowEncodedSlashes from the base configuration into
288 virtual hosts. [Eric Covener]
290 *) AIX: Install DSO's with "cp" instead of "install" in instdso.sh
293 *) mod_ldap: Don't keep retrying if a new LDAP connection times out.
296 *) mod_deflate: permit compilation of mod_deflate against a zlib that has
297 been configured with -D Z_PREFIX, which redefines the token "deflate".
300 *) mod_auth_digest: Use the secret when generating nonces in all cases and
301 not only when AuthName is used in .htaccess files (this change may cause
302 problems if used with round robin load balancers). Don't regenerate the
303 secret on graceful restarts. PR 54637 [Stefan Fritsch]
305 *) core: Remove apr_brigade_flatten(), buffering and duplicated code
306 from the HTTP_IN filter, parse chunks in a single pass with zero copy.
307 Reduce memory usage by 48 bytes per request. [Graham Leggett]
309 *) core: Stop the HTTP_IN filter from attempting to write error buckets
310 to the output filters, which is bogus in the proxy case. Create a
311 clean mapping from APR codes to HTTP status codes, and use it where
312 needed. [Graham Leggett]
314 *) mod_proxy: Ensure network errors detected by the proxy are returned as
315 504 Gateway Timout as opposed to 502 Bad Gateway, in order to be
316 compliant with RFC2616 14.9.4 Cache Revalidation and Reload Controls.
318 *) mod_dav: mod_dav overrides dav_fs response on PUT failure. PR 35981
319 [Basant Kumar Kukreja <basant.kukreja sun.com>, Alejandro Alvarez
320 <alejandro.alvarez.ayllon cern.ch>]
322 *) mod_ldap: LDAP connections used for authentication were not respecting
323 LDAPConnectionPoolTimeout. PR 54587
325 *) core: ap_rgetline_core now pulls from r->proto_input_filters.
327 *) mod_proxy_html: process parsed comments immediately.
328 Fixes bug where parsed comments may be lost. [Nick Kew]
330 *) mod_proxy_html: introduce doctype for HTML 5 [Nick Kew]
332 *) mod_proxy_html: fix typo-bug processing "strict" vs "transitional"
333 HTML/XHTML [Nick Kew]
335 *) core: Add option to add valgrind support. Use it to reduce false positive
336 warnings in mod_ssl. [Stefan Fritsch]
338 *) mod_authn_file, mod_authn_dbd, mod_authn_dbm, mod_authn_socache:
339 Cache the result of the most recent password hash verification for every
340 keep-alive connection. This saves some expensive calculations.
343 *) http: Remove support for Request-Range header sent by Navigator 2-3 and
344 MSIE 3. [Stefan Fritsch]
346 *) core, http: Extend HttpProtocol with an option to enforce stricter HTTP
347 conformance or to only log the found problems. [Stefan Fritsch]
349 *) core: Correctly parse an IPv6 literal host specification in an absolute
350 URL in the request line. [Stefan Fritsch]
354 *) core: Add LogLevelOverride directive that allows to override the
355 loglevel for clients from certain IPs. This also works for things
356 like the SSL handshake where <If> LogLevel ... </If> is evaluated
357 too late. [Stefan Fritsch]
359 *) core: Add new directive Warning to issue warnings from a configuration
360 file. Both Warning and Error now generate a timestamped log message.
363 *) ap_expr: Add SERVER_PROTOCOL_VERSION, ..._MAJOR, and ..._MINOR
364 variables. [Stefan Fritsch]
366 *) core: New directive RegisterHttpMethod for registering non-standard
367 HTTP methods. [Stefan Fritsch]
369 *) core: New directive HttpProtocol which allows to disable HTTP/0.9
370 support. [Stefan Fritsch]
372 *) mod_allowhandlers: New module to forbid specific handlers for specific
373 directories. [Stefan Fritsch]
375 *) mod_systemd: New module, for integration with systemd on Linux.
376 [Jan Kaluza <jkaluza redhat.com>]
378 *) WinNT MPM: Store pid and generation for each thread in scoreboard
379 to allow tracking of threads from exiting children via mod_status
380 or other such mechanisms. [Jeff Trawick]
382 *) The following now respect DefaultRuntimeDir/DEFAULT_REL_RUNTIMEDIR:
383 - APIs: ap_log_pid(), ap_remove_pid, ap_read_pid()
384 - mod_cache: thundering herd lock directory
385 - mod_lbmethod_heartbeat, mod_heartmonitor: heartbeat storage file
386 - mod_ldap: shared memory cache
387 - mod_socache_shmcb, mod_socache_dbm: shared memory or dbm for cache
390 *) suexec: Add --enable-suexec-capabilites support on Linux, to use
391 setuid/setgid capability bits rather than a setuid root binary.
394 *) suexec: Add support for logging to syslog as an alternative to logging
395 to a file; configure --without-suexec-logfile --with-suexec-syslog.
398 *) mod_ssl: Add support for TLS Next Protocol Negotiation. PR 52210.
399 [Matthew Steele <mdsteele google.com>]
401 *) cross-compile: allow to provide CC_FOR_BUILD so that gen_test_char will
402 be compiled by the build compiler instead of the host compiler.
403 Also set CC_FOR_BUILD to 'cc' when cross-compilation is detected.
404 PR 51257. [Guenter Knauf]
406 *) core: In maintainer mode, replace apr_palloc with a version that
407 initializes the allocated memory with non-zero values, except if
408 AP_DEBUG_NO_ALLOC_POISON is defined. [Stefan Fritsch]
410 *) mod_policy: Add a new testing module to help server administrators
411 enforce a configurable level of protocol compliance on their
412 servers and application servers behind theirs. [Graham Leggett]
414 *) mod_firehose: Add a new debugging module able to record traffic
415 passing through the server in such a way that connections and/or
416 requests be reconstructed and replayed. [Graham Leggett]
426 [Apache 2.5.0-dev includes those bug fixes and changes with the
427 Apache 2.4.xx tree as documented below, except as noted.]
429 Changes with Apache 2.4.x and later:
431 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/CHANGES?view=markup
433 Changes with Apache 2.2.x and later:
435 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.2.x/CHANGES?view=markup
437 Changes with Apache 2.0.x and later:
439 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.0.x/CHANGES?view=markup