2 Changes with Apache 2.5.0
4 *) mod_http2: slave connections have conn_rec->aborted flag set when a stream
5 has been reset by the client.
7 *) mod_http2: merge of some 2.4.x adaptions re filters on slave connections.
8 Small fixes in bucket beams when forwarding file buckets. Output handling
9 on master connection uses less FLUSH and passes automatically when more
10 than half of H2StreamMaxMemSize bytes have accumulated.
11 Workaround for http: when forwarding partial file buckets to keep the
12 output filter from closing these too early.
14 *) mod_http2: elimination of fixed master connectin buffer for TLS
15 connections. New scratch bucket handling optimized for TLS write sizes.
16 File bucket data read directly into scratch buffers, avoiding one
17 copy. Non-TLS connections continue to pass buckets unchanged to the core
18 filters to allow sendfile() usage.
20 *) mod_http2/mod_proxy_http2: h2_request.c is no longer shared between these
21 modules. This simplifies building on platforms such as Windows, as module
22 reference used in logging is now clear.
24 *) mod_proxy, mod_ssl: Handle SSLProxy* directives in <Proxy> sections,
25 allowing per backend TLS configuration. [Yann Ylavic]
27 *) core: explicitly exclude 'h2' from protocols announced via an Upgrade:
28 header as commanded by http-wg. [Stefan Eissing]
30 *) http: Respond with "408 Request Timeout" when a timeout occurs while
31 reading the request body. [Yann Ylavic]
33 *) scoreboard/status: Keep workers' previous Client, VHost and Request values
34 when idle, like in 2.4.18 and earlier. [Yann Ylavic]
36 *) mod_proxy_ajp: Add "secret" parameter to proxy workers to implement legacy
37 AJP13 authentication. PR 53098. [Dmitry A. Bakshaev <dab1818 gmail com>]
39 *) mpm_event: Don't take over scoreboard slots from gracefully finishing
40 threads. [Stefan Fritsch]
42 *) mod_status: Display the process slot number in the async connection
43 overview. [Stefan Fritsch]
45 *) mod_include: add the <!--#comment ...> syntax in order to include comments
46 in a SSI file. [Christophe Jaillet based on a suggestion from Rob]
48 *) mpm_event, mpm_worker: Fix computation of MinSpareThreads' lower bound
49 according the number of listeners buckets. [Yann Ylavic]
51 *) mod_proxy_http2: using HTTP/2 flow control for backend streams by
52 observing data actually send out on the frontend h2 connection.
55 *) mpm: Generalise the ap_mpm_register_socket functions to accept pipes
56 or sockets. [Graham Leggett]
58 *) core: Extend support for setting aside data from the network input filter
59 to any connection or request input filter. [Graham Leggett]
61 *) mod_ssl: Add "no_crl_for_cert_ok" flag to SSLCARevocationCheck directive
62 to opt-in previous behaviour (2.2) with CRLs verification when checking
63 certificate(s) with no corresponding CRL. [Yann Ylavic]
65 *) mod_proxy_http2: rescheduling of requests that have not been processed
66 by the backend when receiving a GOAWAY frame before done.
69 *) core: Split ap_create_request() from ap_read_request(). [Graham Leggett]
71 *) ab: Use caseless matching for HTTP tokens (e.g. content-length). PR 59111.
74 *) mod_auth_digest: Fix compatibility with expression-based Authname. PR59039.
77 *) mpm: Add a complete_connection hook that confirms whether an MPM is allowed
78 to leave the WRITE_COMPLETION phase. Move filter code out of the MPMs.
81 *) mod_proxy_http2: using single connection for several requests *if*
82 master connection uses HTTP/2 itself. Not yet hardened under load.
85 *) core: Added support for HTTP code 451. PR58985.
86 [Yehuda Katz <yehuda ymkatz.net>, Jim Jagielski]
88 *) mod_ssl: Add support for OpenSSL 1.1.0. [Rainer Jung]
90 *) mod_proxy_http2: new experimental http2 proxy module for h2: and h2c: proxy
91 urls. Uses, so far, one connection per request, reuses connections.
94 *) mod_filter: Fix AddOutputFilterByType with non-content-level filters.
95 PR58856 [Micha Lenk <micha lenk.info>]
97 *) mod_cache: Consider Cache-Control: s-maxage in expiration
98 calculations. [Eric Covener]
100 *) mod_cache: Allow caching of responses with an Expires header
101 in the past that also has Cache-Control: max-age or s-maxage.
102 PR55156. [Eric Covener]
104 *) mod_proxy_hcheck: Provide for dynamic background health
105 checks on reverse proxies associated with BalancerMember
106 workers. [Jim Jagielski]
108 *) Added many log numbers to log statements that had none.
110 *) mod_session: Introduce SessionExpiryUpdateInterval which allows to
111 configure the session/cookie expiry's update interval. PR 57300.
112 [Paul Spangler <paul.spangler ni.com>]
114 *) core: Extend support for asynchronous write completion from the
115 network filter to any connection or request filter. [Graham Leggett]
117 *) mpm_event: Free memory earlier when shutting down processes.
120 *) mod_auth_digest: remove AuthDigestEnableQueryStringHack which is no
121 more documented since dec 2012 (r1415960). [Christophe Jaillet]
123 *) mod_charset_lite: On EBCDIC platforms, make sure mod_charset_lite runs
124 after other resource-level filters. [Eric Covener]
126 *) mod_dir: Responses that go through "FallbackResource" might appear to
127 hang due to unterminated chunked encoding. PR58292. [Eric Covener]
129 *) http: Don't remove the Content-Length of zero from a HEAD response if
130 it comes from an origin server, module or script. [Yann Ylavic]
132 *) http: Add support for RFC2324/RFC7168. [Graham Leggett]
134 *) mod_rewrite: Add support for starting External Rewriting Programs
135 as non-root user on UNIX systems by specifying username and group name
136 as third argument of RewriteMap directive. [Jan Kaluza]
138 *) mod_authn_core: Add expression support to AuthName and AuthType.
141 *) suexec: Filter out the HTTP_PROXY environment variable because it is
142 treated as alias for http_proxy by some programs. [Stefan Fritsch]
144 *) mod_proxy_http: Don't establish or reuse a backend connection before pre-
145 fetching the request body, so to minimize the delay between it is supposed
146 to be alive and the first bytes sent: this is a best effort to prevent the
147 backend from closing because of idle or keepalive timeout in the meantime.
148 Also, handle a new "proxy-flushall" environment variable which allows to
149 flush any forwarded body data immediately. PR 56541+37920. [Yann Ylavic]
151 *) core: Define and UnDefine are no longer permitted in
152 directory context. Previously they would always be evaulated
153 as the configuration was read without regard for the directory
154 context. [Eric Covener]
156 *) config: For directives that do not expect any arguments, enforce
157 that none are specified in the configuration file.
158 [Joachim Zobel <jzobel heute-morgen.de>, Eric Covener]
160 *) mod_rewrite: Improve 'bad flag delimeters' startup error by showing
161 how the input was tokenized. PR 56528. [Edward Lu <Chaosed0 gmail.com>]
163 *) mod_proxy: Don't put non balancer-member workers in error state by
164 default for connection or 500/503 errors, and honor status=+I for
165 any error. PR 48388. [Yann Ylavic]
167 *) mod_socache_memcache: Pass expiration time through to memcached. PR 55445.
168 [Faidon Liambotis <paravoid debian.org>, Joe Orton]
170 *) ap_expr: Add filemod function for checking file modification dates
173 *) mod_authnz_ldap: Resolve crashes with LDAP authz and non-LDAP authn since
174 r1608202. [Eric Covener]
176 *) apreq: Content-Length header should be always interpreted as a decimal.
177 Leading 0 could be erroneously considered as an octal value. PR 56598.
178 [Chris Card <ctcard hotmail com>]
180 *) mod_proxy: Now allow for 191 character worker names, with non-fatal
181 errors if name is truncated. PR53218. [Jim Jagielski]
183 *) mod_ssl: Add optional function "ssl_get_tls_cb" to allow support
184 for channel bindings. [Simo Sorce <simo redhat.com>]
186 *) mod_proxy_wstunnel: Concurrent websockets messages could be
187 lost or delayed with ProxyWebsocketAsync enabled.
188 [Edward Lu <Chaosed0 gmail.com>]
190 *) core, mod_info: Add compiled and loaded PCRE versions to version
191 number display. [Rainer Jung]
193 *) mod_authnz_ldap: Return LDAP connections to the pool before the handler
194 is run, instead of waiting until the end of the request. [Eric Covener]
196 *) mod_proxy_html: support automatic detection of doctype and processing
197 of FPIs. PR56285 [Micha Lenk <micha lenk info>, Nick Kew]
199 *) mod_proxy_html: skip documents shorter than 4 bytes
200 PR 56286 [Micha Lenk <micha lenk info>]
202 *) mod_proxy_fdpass: Fix computation of the size of 'struct sockaddr_un'
203 when passed to 'connect()'.
204 [Graham Dumpleton <grahamd apache org>]
206 *) core: Add ap_mpm_resume_suspended() API to allow a suspended connection
208 [Artem <artemciy gmail.com>, Edward Lu <Chaosed0 gmail.com>]
210 *) core: Add ap_mpm_register_socket_callback_timeout() API. [Eric Covener]
212 *) mod_proxy_wstunnel: Honor ProxyWebsocketIdleTimeout in asynchronous
213 processing mode. [Eric Covener]
215 *) mod_authnz_ldap: Fail explicitly when the filter is too long. Remove
216 unnecessary apr_pstrdup() and strlen(). [Graham Leggett]
218 *) Add the ldap-search option to mod_authnz_ldap, allowing authorization
219 to be based on arbitrary expressions that do not include the username.
222 *) Add the ldap function to the expression API, allowing LDAP filters and
223 distinguished names based on expressions to be escaped correctly to
224 guard against LDAP injection. [Graham Leggett]
226 *) Add module mod_ssl_ct, which provides an implementation of Certificate
227 Transparency (RFC 6962) for httpd. [Jeff Trawick]
229 *) mod_proxy_wstunnel: Avoid sending error responses down an upgraded
230 websockets connection as it is being close down. [Eric Covener]
232 *) mod_proxy_wstunnel: Allow the administrator to cap the amount
233 of time a synchronous websockets connection stays idle with
234 ProxyWebsocketIdleTimeout. [Eric Covener]
236 *) mod_proxy_wstunnel: Change to opt-in for asynchronous support, adding
237 directives ProxyWebsocketAsync and ProxyWebsocketAsyncDelay.
240 *) mod_proxy_wstunnel: Stop leaking websockets backend connections under
241 event MPM (trunk-only). [Eric Covener]
243 *) mod_proxy_http: Add detach_backend hook (potentially usable
244 in other proxy scheme handlers). [Jeff Trawick]
246 *) mod_deflate: Add DeflateAlterETag to control how the ETag
247 is modified. The 'NoChange' parameter mimics 2.2.x behavior.
248 PR 45023, PR 39727. [Eric Covener]
250 *) mod_rewrite: Add 'BNF' (backreferences-no-plus) flag to RewriteRule to
251 allow spaces in backreferences to be encoded as %20 instead of '+'.
254 *) mod_rewrite: Support an optional list of characters to escape in the
255 argument for the 'B' (escape backreferences) flag. [Eric Covener]
257 *) mod_dir: Default to 2.2-like behavior and skip execution when method is
258 neither GET nor POST, such as for DAV requests. PR 54914. [Chris Darroch]
260 *) mod_rewrite: Rename the handler that does per-directory internal
261 redirects to "rewrite-redirect-handler" from "redirect-handler" so
262 it is less ambiguous and less likely to be reused. [Eric Covener]
264 *) mod_rewrite: Protect against looping with the [N] flag by enforcing a
265 default limit of 10000 iterations, and allowing each rule to change its
266 limit. [Eric Covener]
268 *) mod_ssl: Fix config merging of SSLOCSPEnable and SSLOCSPOverrideResponder.
271 *) Add HttpContentLengthHeadZero and HttpExpectStrict directives.
272 [Yehuda Sadeh <yehuda inktank com>, Justin Erenkrantz]
274 *) mod_ssl: Add -t -DDUMP_CA_CERTS option which dumps the filenames of all
275 configured SSL CA certificates to stdout the same way as DUMP_CERTS does.
278 *) mod_ssl: Don't flush when an EOS is received. Prepares mod_ssl
279 to support write completion. [Graham Leggett]
281 *) core: Add parse_errorlog_arg callback to ap_errorlog_provider
282 to allow providers to check the ErrorLog argument. [Jan Kaluza]
284 *) mod_cgid: Use the servers Timeout for each read from a CGI script,
285 allow override with new CGIDRequestTimeout directive. PR43494
286 [Eric Covener, Toshikuni Fukaya <toshikuni-fukaya cybozu co jp>]
288 *) core: ensure any abnormal exit is reported to stderr if it's a tty.
291 *) mod_lua: Let the Inter-VM get/set functions work with a global
292 shared memory pool instead of a per-process pool. [Daniel Gruno]
294 *) ldap: Support ldaps when using the Microsoft LDAP SDK.
295 PR 54626. [Jean-Frederic Clere]
297 *) mod_authnz_ldap: Change default value of AuthLDAPMaxSubGroupDepth to 0
298 to avoid performance problems when subgroups aren't in use. [Eric Covener]
300 *) mod_syslog: New module implementing syslog ap_error_log provider.
301 Previously, this code was part of core, now it's in separate module.
304 *) core: Add ap_errorlog_provider to make ErrorLog logging modular. Move
305 syslog support from core to new mod_syslog. [Jan Kaluza]
307 *) mod_status, mod_echo: Fix the display of client addresses.
308 They were truncated to 31 characters which is not enough for IPv6 addresses.
309 PR 54848 [Bernhard Schmidt <berni birkenwald de>]
311 *) mod_unique_id: Use output of the PRNG rather than IP address and
312 pid, avoiding sleep() call and possible DNS issues at startup,
313 plus improving randomness for IPv6-only hosts.
314 [Jan Kaluza <jkaluza redhat.com>]
316 *) mod_file_cache: mod_file_cache should be able to serve files that
317 haven't had a Content-Type set via e.g. mod_mime. [Eric Covener]
319 *) core: merge AllowEncodedSlashes from the base configuration into
320 virtual hosts. [Eric Covener]
322 *) AIX: Install DSO's with "cp" instead of "install" in instdso.sh
325 *) mod_ldap: Don't keep retrying if a new LDAP connection times out.
328 *) mod_deflate: permit compilation of mod_deflate against a zlib that has
329 been configured with -D Z_PREFIX, which redefines the token "deflate".
332 *) mod_auth_digest: Use the secret when generating nonces in all cases and
333 not only when AuthName is used in .htaccess files (this change may cause
334 problems if used with round robin load balancers). Don't regenerate the
335 secret on graceful restarts. PR 54637 [Stefan Fritsch]
337 *) core: Remove apr_brigade_flatten(), buffering and duplicated code
338 from the HTTP_IN filter, parse chunks in a single pass with zero copy.
339 Reduce memory usage by 48 bytes per request. [Graham Leggett]
341 *) core: Stop the HTTP_IN filter from attempting to write error buckets
342 to the output filters, which is bogus in the proxy case. Create a
343 clean mapping from APR codes to HTTP status codes, and use it where
344 needed. [Graham Leggett]
346 *) mod_proxy: Ensure network errors detected by the proxy are returned as
347 504 Gateway Timout as opposed to 502 Bad Gateway, in order to be
348 compliant with RFC2616 14.9.4 Cache Revalidation and Reload Controls.
350 *) mod_dav: mod_dav overrides dav_fs response on PUT failure. PR 35981
351 [Basant Kumar Kukreja <basant.kukreja sun.com>, Alejandro Alvarez
352 <alejandro.alvarez.ayllon cern.ch>]
354 *) mod_ldap: LDAP connections used for authentication were not respecting
355 LDAPConnectionPoolTimeout. PR 54587
357 *) core: ap_rgetline_core now pulls from r->proto_input_filters.
359 *) mod_proxy_html: process parsed comments immediately.
360 Fixes bug where parsed comments may be lost. [Nick Kew]
362 *) mod_proxy_html: introduce doctype for HTML 5 [Nick Kew]
364 *) mod_proxy_html: fix typo-bug processing "strict" vs "transitional"
365 HTML/XHTML [Nick Kew]
367 *) core: Add option to add valgrind support. Use it to reduce false positive
368 warnings in mod_ssl. [Stefan Fritsch]
370 *) mod_authn_file, mod_authn_dbd, mod_authn_dbm, mod_authn_socache:
371 Cache the result of the most recent password hash verification for every
372 keep-alive connection. This saves some expensive calculations.
375 *) http: Remove support for Request-Range header sent by Navigator 2-3 and
376 MSIE 3. [Stefan Fritsch]
378 *) core, http: Extend HttpProtocol with an option to enforce stricter HTTP
379 conformance or to only log the found problems. [Stefan Fritsch]
381 *) core: Correctly parse an IPv6 literal host specification in an absolute
382 URL in the request line. [Stefan Fritsch]
386 *) core: Add LogLevelOverride directive that allows to override the
387 loglevel for clients from certain IPs. This also works for things
388 like the SSL handshake where <If> LogLevel ... </If> is evaluated
389 too late. [Stefan Fritsch]
391 *) core: Add new directive Warning to issue warnings from a configuration
392 file. Both Warning and Error now generate a timestamped log message.
395 *) ap_expr: Add SERVER_PROTOCOL_VERSION, ..._MAJOR, and ..._MINOR
396 variables. [Stefan Fritsch]
398 *) core: New directive RegisterHttpMethod for registering non-standard
399 HTTP methods. [Stefan Fritsch]
401 *) core: New directive HttpProtocol which allows to disable HTTP/0.9
402 support. [Stefan Fritsch]
404 *) mod_allowhandlers: New module to forbid specific handlers for specific
405 directories. [Stefan Fritsch]
407 *) mod_systemd: New module, for integration with systemd on Linux.
408 [Jan Kaluza <jkaluza redhat.com>]
410 *) WinNT MPM: Store pid and generation for each thread in scoreboard
411 to allow tracking of threads from exiting children via mod_status
412 or other such mechanisms. [Jeff Trawick]
414 *) The following now respect DefaultRuntimeDir/DEFAULT_REL_RUNTIMEDIR:
415 - APIs: ap_log_pid(), ap_remove_pid, ap_read_pid()
416 - mod_cache: thundering herd lock directory
417 - mod_lbmethod_heartbeat, mod_heartmonitor: heartbeat storage file
418 - mod_ldap: shared memory cache
419 - mod_socache_shmcb, mod_socache_dbm: shared memory or dbm for cache
422 *) suexec: Add --enable-suexec-capabilites support on Linux, to use
423 setuid/setgid capability bits rather than a setuid root binary.
426 *) suexec: Add support for logging to syslog as an alternative to logging
427 to a file; configure --without-suexec-logfile --with-suexec-syslog.
430 *) mod_ssl: Add support for TLS Next Protocol Negotiation. PR 52210.
431 [Matthew Steele <mdsteele google.com>]
433 *) cross-compile: allow to provide CC_FOR_BUILD so that gen_test_char will
434 be compiled by the build compiler instead of the host compiler.
435 Also set CC_FOR_BUILD to 'cc' when cross-compilation is detected.
436 PR 51257. [Guenter Knauf]
438 *) core: In maintainer mode, replace apr_palloc with a version that
439 initializes the allocated memory with non-zero values, except if
440 AP_DEBUG_NO_ALLOC_POISON is defined. [Stefan Fritsch]
442 *) mod_policy: Add a new testing module to help server administrators
443 enforce a configurable level of protocol compliance on their
444 servers and application servers behind theirs. [Graham Leggett]
446 *) mod_firehose: Add a new debugging module able to record traffic
447 passing through the server in such a way that connections and/or
448 requests be reconstructed and replayed. [Graham Leggett]
458 [Apache 2.5.0-dev includes those bug fixes and changes with the
459 Apache 2.4.xx tree as documented below, except as noted.]
461 Changes with Apache 2.4.x and later:
463 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/CHANGES?view=markup
465 Changes with Apache 2.2.x and later:
467 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.2.x/CHANGES?view=markup
469 Changes with Apache 2.0.x and later:
471 *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.0.x/CHANGES?view=markup