2 Changes with Apache 2.5.0
4 *) core: EBCDIC fixes for interim responses with additional headers.
7 *) mod_http2: fix for possible page fault when stream is resumed during
8 session shutdown. [sidney-j-r-m (github)]
10 *) mod_http2: fix for h2 session ignoring new responses while already
11 open streams continue to have data available. [Stefan Eissing]
13 *) mod_remoteip: Add support for PROXY protocol (code donated by Cloudzilla).
14 Add ability for PROXY protocol processing to be optional to donated code.
15 See also: http://www.haproxy.org/download/1.5/doc/proxy-protocol.txt
16 [Cloudzilla/roadrunner2@GitHub, Jim Jagielski, Daniel Ruggeri]
18 *) mod_rewrite: When a substitution is a fully qualified URL, and the
19 scheme/host/port matches the current virtual host, stop interpreting the
20 path component as a local path just because the first component of the
21 path exists in the filesystem. Adds RewriteOption "LegacyPrefixDocRoot"
22 to revert to previous behavior. PR60009.
23 [Hank Ibell <hwibell gmail.com>]
25 *) core: Add %{REMOTE_PORT} to the expression parser. PR59938
26 [Hank Ibell <hwibell gmail.com>]
28 *) mod_remoteip: When overriding the useragent address from X-Forwarded-For,
29 zero out what had been initialized as the connection-level port. PR59931.
30 [Hank Ibell <hwibell gmail.com>]
32 *) mod_proxy_wstunnel: Reliably run before mod_proxy_http.
35 *) mod_proxy_protocol: Add server-side, front-end support for PROXY PROTOCOL
36 (http://blog.haproxy.com/haproxy/proxy-protocol/). [roadrunner2]
38 *) mod_proxy_fcgi: Return HTTP 504 rather than 503 in case of proxy timeout.
41 *) mod_proxy_{ajp,fcgi}: Fix a possible crash when reusing an established
42 backend connection, happening with LogLevel trace2 or higher configured,
43 or at any log level with compilers not detected as C99 compliant (e.g.
44 MSVC on Windows). [Yann Ylavic]
46 *) mod_ext_filter: Don't interfere with "error buckets" issued by other
47 modules. PR60375. [Eric Covener, Lubos Uhliarik]
49 *) mod_proxy_fcgi, mod_fcgid: Fix crashes in ap_fcgi_encoded_env_len() when
50 modules add empty environment variables to the request. PR60275.
51 [<alex2grad AT gmail.com>]
53 *) http: Allow unknown response status' lines returned in the form of
54 "HTTP/x.x xxx Status xxx". [Yann Ylavic]
56 *) core: Add <IfFile> configuration section to allow any file on disk to be
57 used as a conditional. [Edward Lu, Eric Covener]
59 *) event: Avoid listener periodic wake ups by using the pollset wake-ability
60 when available. PR 57399. [Yann Ylavic, Luca Toscano]
62 *) mod_brotli: Add a new module for dynamic Brotli (RFC 7932) compression.
65 *) core: Permit unencoded ';' characters to appear in proxy requests and
66 Location: response headers. Corresponds to modern browser behavior.
69 *) mod_crypto: Add the all purpose crypto filters with support for HLS.
72 *) core: Drop an invalid Last-Modified header value coming
73 from a FCGI/CGI script instead of replacing it with Unix epoch.
74 Warn the users about Last-Modified header value replacements
75 and violations of the RFC.
76 [Yann Ylavic, Luca Toscano, William Rowe, Jacob Champion]
78 *) mod_dav: Allow other modules to become providers and add ACLs
80 [Jari Urpalainen <jari.urpalainen nokia.com>, Graham Leggett]
82 *) mod_dav: Add dav_begin_multistatus, dav_send_one_response,
83 dav_finish_multistatus, dav_send_multistatus, dav_handle_err,
84 dav_failed_proppatch, dav_success_proppatch to mod_dav.h.
85 [Jari Urpalainen <jari.urpalainen nokia.com>, Graham Leggett]
87 *) mod_proxy, mod_ssl: Handle SSLProxy* directives in <Proxy> sections,
88 allowing per backend TLS configuration. [Yann Ylavic]
90 *) core: explicitly exclude 'h2' from protocols announced via an Upgrade:
91 header as commanded by http-wg. [Stefan Eissing]
93 *) mod_proxy_ajp: Add "secret" parameter to proxy workers to implement legacy
94 AJP13 authentication. PR 53098. [Dmitry A. Bakshaev <dab1818 gmail com>]
96 *) mpm: Generalise the ap_mpm_register_socket functions to accept pipes
97 or sockets. [Graham Leggett]
99 *) core: Extend support for setting aside data from the network input filter
100 to any connection or request input filter. [Graham Leggett]
102 *) core: Split ap_create_request() from ap_read_request(). [Graham Leggett]
104 *) mod_auth_digest: Fix compatibility with expression-based Authname. PR59039.
107 *) mpm: Add a complete_connection hook that confirms whether an MPM is allowed
108 to leave the WRITE_COMPLETION phase. Move filter code out of the MPMs.
111 *) core: Added support for HTTP code 451. PR58985.
112 [Yehuda Katz <yehuda ymkatz.net>, Jim Jagielski]
114 *) mod_ssl: Add support for OpenSSL 1.1.0. [Rainer Jung]
116 *) mod_filter: Fix AddOutputFilterByType with non-content-level filters.
117 PR58856 [Micha Lenk <micha lenk.info>]
119 *) mod_cache: Consider Cache-Control: s-maxage in expiration
120 calculations. [Eric Covener]
122 *) mod_cache: Allow caching of responses with an Expires header
123 in the past that also has Cache-Control: max-age or s-maxage.
124 PR55156. [Eric Covener]
126 *) Added many log numbers to log statements that had none.
128 *) mod_session: Introduce SessionExpiryUpdateInterval which allows to
129 configure the session/cookie expiry's update interval. PR 57300.
130 [Paul Spangler <paul.spangler ni.com>]
132 *) core: Extend support for asynchronous write completion from the
133 network filter to any connection or request filter. [Graham Leggett]
135 *) mod_auth_digest: remove AuthDigestEnableQueryStringHack which is no
136 more documented since dec 2012 (r1415960). [Christophe Jaillet]
138 *) mod_charset_lite: On EBCDIC platforms, make sure mod_charset_lite runs
139 after other resource-level filters. [Eric Covener]
141 *) http: Don't remove the Content-Length of zero from a HEAD response if
142 it comes from an origin server, module or script. [Yann Ylavic]
144 *) http: Add support for RFC2324/RFC7168. [Graham Leggett]
146 *) mod_rewrite: Add support for starting External Rewriting Programs
147 as non-root user on UNIX systems by specifying username and group name
148 as third argument of RewriteMap directive. [Jan Kaluza]
150 *) mod_authn_core: Add expression support to AuthName and AuthType.
153 *) suexec: Filter out the HTTP_PROXY environment variable because it is
154 treated as alias for http_proxy by some programs. [Stefan Fritsch]
156 *) mod_proxy_http: Don't establish or reuse a backend connection before pre-
157 fetching the request body, so to minimize the delay between it is supposed
158 to be alive and the first bytes sent: this is a best effort to prevent the
159 backend from closing because of idle or keepalive timeout in the meantime.
160 Also, handle a new "proxy-flushall" environment variable which allows to
161 flush any forwarded body data immediately. PR 56541+37920. [Yann Ylavic]
163 *) core: Define and UnDefine are no longer permitted in
164 directory context. Previously they would always be evaulated
165 as the configuration was read without regard for the directory
166 context. [Eric Covener]
168 *) config: For directives that do not expect any arguments, enforce
169 that none are specified in the configuration file.
170 [Joachim Zobel <jzobel heute-morgen.de>, Eric Covener]
172 *) mod_rewrite: Improve 'bad flag delimeters' startup error by showing
173 how the input was tokenized. PR 56528. [Edward Lu <Chaosed0 gmail.com>]
175 *) mod_proxy: Don't put non balancer-member workers in error state by
176 default for connection or 500/503 errors, and honor status=+I for
177 any error. PR 48388. [Yann Ylavic]
179 *) mod_socache_memcache: Pass expiration time through to memcached. PR 55445.
180 [Faidon Liambotis <paravoid debian.org>, Joe Orton]
182 *) ap_expr: Add filemod function for checking file modification dates
185 *) mod_authnz_ldap: Resolve crashes with LDAP authz and non-LDAP authn since
186 r1608202. [Eric Covener]
188 *) apreq: Content-Length header should be always interpreted as a decimal.
189 Leading 0 could be erroneously considered as an octal value. PR 56598.
190 [Chris Card <ctcard hotmail com>]
192 *) mod_proxy: Now allow for 191 character worker names, with non-fatal
193 errors if name is truncated. PR53218. [Jim Jagielski]
195 *) mod_ssl: Add optional function "ssl_get_tls_cb" to allow support
196 for channel bindings. [Simo Sorce <simo redhat.com>]
198 *) mod_proxy_wstunnel: Concurrent websockets messages could be
199 lost or delayed with ProxyWebsocketAsync enabled.
200 [Edward Lu <Chaosed0 gmail.com>]
202 *) core, mod_info: Add compiled and loaded PCRE versions to version
203 number display. [Rainer Jung]
205 *) mod_authnz_ldap: Return LDAP connections to the pool before the handler
206 is run, instead of waiting until the end of the request. [Eric Covener]
208 *) mod_proxy_html: support automatic detection of doctype and processing
209 of FPIs. PR56285 [Micha Lenk <micha lenk info>, Nick Kew]
211 *) mod_proxy_html: skip documents shorter than 4 bytes
212 PR 56286 [Micha Lenk <micha lenk info>]
214 *) mod_proxy_fdpass: Fix computation of the size of 'struct sockaddr_un'
215 when passed to 'connect()'.
216 [Graham Dumpleton <grahamd apache org>]
218 *) core: Add ap_mpm_resume_suspended() API to allow a suspended connection
220 [Artem <artemciy gmail.com>, Edward Lu <Chaosed0 gmail.com>]
222 *) core: Add ap_mpm_register_socket_callback_timeout() API. [Eric Covener]
224 *) mod_proxy_wstunnel: Honor ProxyWebsocketIdleTimeout in asynchronous
225 processing mode. [Eric Covener]
227 *) mod_authnz_ldap: Fail explicitly when the filter is too long. Remove
228 unnecessary apr_pstrdup() and strlen(). [Graham Leggett]
230 *) Add the ldap-search option to mod_authnz_ldap, allowing authorization
231 to be based on arbitrary expressions that do not include the username.
234 *) Add the ldap function to the expression API, allowing LDAP filters and
235 distinguished names based on expressions to be escaped correctly to
236 guard against LDAP injection. [Graham Leggett]
238 *) Add module mod_ssl_ct, which provides an implementation of Certificate
239 Transparency (RFC 6962) for httpd. [Jeff Trawick]
241 *) mod_proxy_wstunnel: Avoid sending error responses down an upgraded
242 websockets connection as it is being close down. [Eric Covener]
244 *) mod_proxy_wstunnel: Allow the administrator to cap the amount
245 of time a synchronous websockets connection stays idle with
246 ProxyWebsocketIdleTimeout. [Eric Covener]
248 *) mod_proxy_wstunnel: Change to opt-in for asynchronous support, adding
249 directives ProxyWebsocketAsync and ProxyWebsocketAsyncDelay.
252 *) mod_proxy_wstunnel: Stop leaking websockets backend connections under
253 event MPM (trunk-only). [Eric Covener]
255 *) mod_proxy_http: Add detach_backend hook (potentially usable
256 in other proxy scheme handlers). [Jeff Trawick]
258 *) mod_deflate: Add DeflateAlterETag to control how the ETag
259 is modified. The 'NoChange' parameter mimics 2.2.x behavior.
260 PR 45023, PR 39727. [Eric Covener]
262 *) mod_rewrite: Add 'BNF' (backreferences-no-plus) flag to RewriteRule to
263 allow spaces in backreferences to be encoded as %20 instead of '+'.
266 *) mod_rewrite: Support an optional list of characters to escape in the
267 argument for the 'B' (escape backreferences) flag. [Eric Covener]
269 *) mod_dir: Default to 2.2-like behavior and skip execution when method is
270 neither GET nor POST, such as for DAV requests. PR 54914. [Chris Darroch]
272 *) mod_rewrite: Rename the handler that does per-directory internal
273 redirects to "rewrite-redirect-handler" from "redirect-handler" so
274 it is less ambiguous and less likely to be reused. [Eric Covener]
276 *) mod_rewrite: Protect against looping with the [N] flag by enforcing a
277 default limit of 10000 iterations, and allowing each rule to change its
278 limit. [Eric Covener]
280 *) mod_ssl: Fix config merging of SSLOCSPEnable and SSLOCSPOverrideResponder.
283 *) Add HttpContentLengthHeadZero and HttpExpectStrict directives.
284 [Yehuda Sadeh <yehuda inktank com>, Justin Erenkrantz]
286 *) mod_ssl: Add -t -DDUMP_CA_CERTS option which dumps the filenames of all
287 configured SSL CA certificates to stdout the same way as DUMP_CERTS does.
290 *) mod_ssl: Don't flush when an EOS is received. Prepares mod_ssl
291 to support write completion. [Graham Leggett]
293 *) core: Add parse_errorlog_arg callback to ap_errorlog_provider
294 to allow providers to check the ErrorLog argument. [Jan Kaluza]
296 *) mod_cgid: Use the servers Timeout for each read from a CGI script,
297 allow override with new CGIDRequestTimeout directive. PR43494
298 [Eric Covener, Toshikuni Fukaya <toshikuni-fukaya cybozu co jp>]
300 *) core: ensure any abnormal exit is reported to stderr if it's a tty.
303 *) mod_lua: Let the Inter-VM get/set functions work with a global
304 shared memory pool instead of a per-process pool. [Daniel Gruno]
306 *) ldap: Support ldaps when using the Microsoft LDAP SDK.
307 PR 54626. [Jean-Frederic Clere]
309 *) mod_authnz_ldap: Change default value of AuthLDAPMaxSubGroupDepth to 0
310 to avoid performance problems when subgroups aren't in use. [Eric Covener]
312 *) mod_syslog: New module implementing syslog ap_error_log provider.
313 Previously, this code was part of core, now it's in separate module.
316 *) core: Add ap_errorlog_provider to make ErrorLog logging modular. Move
317 syslog support from core to new mod_syslog. [Jan Kaluza]
319 *) mod_status, mod_echo: Fix the display of client addresses.
320 They were truncated to 31 characters which is not enough for IPv6 addresses.
321 PR 54848 [Bernhard Schmidt <berni birkenwald de>]
323 *) mod_unique_id: Use output of the PRNG rather than IP address and
324 pid, avoiding sleep() call and possible DNS issues at startup,
325 plus improving randomness for IPv6-only hosts.
326 [Jan Kaluza <jkaluza redhat.com>]
328 *) mod_file_cache: mod_file_cache should be able to serve files that
329 haven't had a Content-Type set via e.g. mod_mime. [Eric Covener]
331 *) core: merge AllowEncodedSlashes from the base configuration into
332 virtual hosts. [Eric Covener]
334 *) AIX: Install DSO's with "cp" instead of "install" in instdso.sh
337 *) mod_ldap: Don't keep retrying if a new LDAP connection times out.
340 *) mod_deflate: permit compilation of mod_deflate against a zlib that has
341 been configured with -D Z_PREFIX, which redefines the token "deflate".
344 *) mod_auth_digest: Use the secret when generating nonces in all cases and
345 not only when AuthName is used in .htaccess files (this change may cause
346 problems if used with round robin load balancers). Don't regenerate the
347 secret on graceful restarts. PR 54637 [Stefan Fritsch]
349 *) core: Remove apr_brigade_flatten(), buffering and duplicated code
350 from the HTTP_IN filter, parse chunks in a single pass with zero copy.
351 Reduce memory usage by 48 bytes per request. [Graham Leggett]
353 *) core: Stop the HTTP_IN filter from attempting to write error buckets
354 to the output filters, which is bogus in the proxy case. Create a
355 clean mapping from APR codes to HTTP status codes, and use it where
356 needed. [Graham Leggett]
358 *) mod_proxy: Ensure network errors detected by the proxy are returned as
359 504 Gateway Timout as opposed to 502 Bad Gateway, in order to be
360 compliant with RFC2616 14.9.4 Cache Revalidation and Reload Controls.
362 *) mod_dav: mod_dav overrides dav_fs response on PUT failure. PR 35981
363 [Basant Kumar Kukreja <basant.kukreja sun.com>, Alejandro Alvarez
364 <alejandro.alvarez.ayllon cern.ch>]
366 *) mod_ldap: LDAP connections used for authentication were not respecting
367 LDAPConnectionPoolTimeout. PR 54587
369 *) core: ap_rgetline_core now pulls from r->proto_input_filters.
371 *) mod_proxy_html: process parsed comments immediately.
372 Fixes bug where parsed comments may be lost. [Nick Kew]
374 *) mod_proxy_html: introduce doctype for HTML 5 [Nick Kew]
376 *) mod_proxy_html: fix typo-bug processing "strict" vs "transitional"
377 HTML/XHTML [Nick Kew]
379 *) core: Add option to add valgrind support. Use it to reduce false positive
380 warnings in mod_ssl. [Stefan Fritsch]
382 *) mod_authn_file, mod_authn_dbd, mod_authn_dbm, mod_authn_socache:
383 Cache the result of the most recent password hash verification for every
384 keep-alive connection. This saves some expensive calculations.
387 *) http: Remove support for Request-Range header sent by Navigator 2-3 and
388 MSIE 3. [Stefan Fritsch]
390 *) core, http: Extend HttpProtocol with an option to enforce stricter HTTP
391 conformance or to only log the found problems. [Stefan Fritsch]
393 *) core: Correctly parse an IPv6 literal host specification in an absolute
394 URL in the request line. [Stefan Fritsch]
398 *) core: Add LogLevelOverride directive that allows to override the
399 loglevel for clients from certain IPs. This also works for things
400 like the SSL handshake where <If> LogLevel ... </If> is evaluated
401 too late. [Stefan Fritsch]
403 *) core: Add new directive Warning to issue warnings from a configuration
404 file. Both Warning and Error now generate a timestamped log message.
407 *) ap_expr: Add SERVER_PROTOCOL_VERSION, ..._MAJOR, and ..._MINOR
408 variables. [Stefan Fritsch]
410 *) core: New directive RegisterHttpMethod for registering non-standard
411 HTTP methods. [Stefan Fritsch]
413 *) core: New directive HttpProtocol which allows to disable HTTP/0.9
414 support. [Stefan Fritsch]
416 *) mod_allowhandlers: New module to forbid specific handlers for specific
417 directories. [Stefan Fritsch]
419 *) mod_systemd: New module, for integration with systemd on Linux.
420 [Jan Kaluza <jkaluza redhat.com>]
422 *) WinNT MPM: Store pid and generation for each thread in scoreboard
423 to allow tracking of threads from exiting children via mod_status
424 or other such mechanisms. [Jeff Trawick]
426 *) The following now respect DefaultRuntimeDir/DEFAULT_REL_RUNTIMEDIR:
427 - APIs: ap_log_pid(), ap_remove_pid, ap_read_pid()
428 - mod_cache: thundering herd lock directory
429 - mod_lbmethod_heartbeat, mod_heartmonitor: heartbeat storage file
430 - mod_ldap: shared memory cache
431 - mod_socache_shmcb, mod_socache_dbm: shared memory or dbm for cache
434 *) suexec: Add --enable-suexec-capabilites support on Linux, to use
435 setuid/setgid capability bits rather than a setuid root binary.
438 *) suexec: Add support for logging to syslog as an alternative to logging
439 to a file; configure --without-suexec-logfile --with-suexec-syslog.
442 *) mod_ssl: Add support for TLS Next Protocol Negotiation. PR 52210.
443 [Matthew Steele <mdsteele google.com>]
445 *) cross-compile: allow to provide CC_FOR_BUILD so that gen_test_char will
446 be compiled by the build compiler instead of the host compiler.
447 Also set CC_FOR_BUILD to 'cc' when cross-compilation is detected.
448 PR 51257. [Guenter Knauf]
450 *) core: In maintainer mode, replace apr_palloc with a version that
451 initializes the allocated memory with non-zero values, except if
452 AP_DEBUG_NO_ALLOC_POISON is defined. [Stefan Fritsch]
454 *) mod_policy: Add a new testing module to help server administrators
455 enforce a configurable level of protocol compliance on their
456 servers and application servers behind theirs. [Graham Leggett]
458 *) mod_firehose: Add a new debugging module able to record traffic
459 passing through the server in such a way that connections and/or
460 requests be reconstructed and replayed. [Graham Leggett]
470 [Apache 2.5.0-dev includes those bug fixes and changes with the
471 Apache 2.4.xx tree as documented below, except as noted.]
473 Changes with Apache 2.4.x and later:
475 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/CHANGES?view=markup
477 Changes with Apache 2.2.x and later:
479 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.2.x/CHANGES?view=markup
481 Changes with Apache 2.0.x and later:
483 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.0.x/CHANGES?view=markup