-*- coding: utf-8 -*- Changes with Apache 2.5.0 *) core: fix a bug in directive processing. When used, the last 'ed variable was also withdrawn. PR 59019 [Christophe Jaillet] *) mod_http2: limiting the amount of h2 workers a HTTP/2 connection can occupy at a time to make DoS life harder. Limiting this to static 6 in honor of http/1.1 connection limits, considering implementing dynamic adjustments based on load and throughput. This does *not* limit the number of streams a client may open, rather the number of server threads a connection might use. [Stefan Eissing] *) mod_auth_digest: Fix compatibility with expression-based Authname. PR59039. [Eric Covener] *) mpm: Add a complete_connection hook that confirms whether an MPM is allowed to leave the WRITE_COMPLETION phase. Move filter code out of the MPMs. [Graham Leggett] *) mod_proxy_http2: using single connection for several requests *if* master connection uses HTTP/2 itself. Not yet hardened under load. [Stefan Eissing] *) core: Added support for HTTP code 451. PR58985. [Yehuda Katz , Jim Jagielski] *) mod_ssl: Add support for OpenSSL 1.1.0. [Rainer Jung] *) hostname: Test and log useragent_host per-request across various modules, including the scoreboard, expression and rewrite engines, setenvif, authz_host, access_compat, custom logging, ssl and REMOTE_HOST variables. PR55348 [William Rowe] *) core: Track the useragent_host per-request when mod_remoteip or similar modules track a per-request useragent_ip. Modules should be updated to inquire for ap_get_useragent_host() in place of ap_get_remote_host(). [William Rowe] *) mod_proxy: Play/restore the TLS-SNI on new backend connections which had to be issued because the remote closed the previous/reusable one during idle (keep-alive) time. [Yann Ylavic] *) mod_proxy_http2: new experimental http2 proxy module for h2: and h2c: proxy urls. Uses, so far, one connection per request, reuses connections. [Stefan Eissing] *) event: use pre_connection hook to properly initialize connection state for slave connections. use protocol_switch hook to initialize server config early based on SNI selected vhost. [Stefan Eissing] *) mod_http2: allowing link header to specify multiple "rel" values, space-separated inside a quoted string. Prohibiting push when Link parameter "nopush" is present. [Stefan Eissing] *) core: Prevent a server crash in case of an invalid CONNECT request with a custom error page for status code 400 that uses server side includes. PR 58929 [Ruediger Pluem] *) mod_ssl: Add SSLOCSPProxyURL to add the possibility to do all queries to OCSP responders through a HTTP proxy. [Ruediger Pluem] *) mod_http2: idle connections are returned to async mpms. new hook "pre_close_connection" used to send GOAWAY frame when not already done. Setting event mpm server config "by hand" for the main connection to the correct negotiated server. [Stefan Eissing] *) mod_filter: Fix AddOutputFilterByType with non-content-level filters. PR58856 [Micha Lenk ] *) mod_cache: Consider Cache-Control: s-maxage in expiration calculations. [Eric Covener] *) mod_cache: Allow caching of responses with an Expires header in the past that also has Cache-Control: max-age or s-maxage. PR55156. [Eric Covener] *) ap_expr: expression support for variable HTTP2=on|off [Stefan Eissing] *) mod_http2: keep-alive blocking reads are done with 1 second timeouts to check for MPM stopping. Will announce early GOAWAY and finish processing open streams, then close. [Stefan Eissing] *) mod_proxy_hcheck: Provide for dynamic background health checks on reverse proxies associated with BalancerMember workers. [Jim Jagielski] *) mod_ssl: handle TIMEOUT on empty SSL input as non-fatal, returning APR_TIMEUP and preserving connection state for later retry. [Stefan Eissing] *) mod_http2: bytes read/written on slave connections are reported via the optional mod_logio functions. Fixes PR 58871. *) Added many log numbers to log statements that had none. *) core: Add expression support to SetHandler. [Eric Covener] *) mod_proxy_fcgi: Suppress HTTP error 503 and message 01075, "Error dispatching request", when the cause appears to be due to the client closing the connection. PR58118. [Tobias Adolph ] *) mod_cgid: Message 02550, failure to flush a response to the client, is now logged at TRACE1 level to match the underlying core output filter severity. [Eric Covener] *) mod_rewrite: Avoid looping on relative substitutions that result in the same filename we started with. PR 58854. [Eric Covener] *) mime.types: add common extension "m4a" for MPEG 4 Audio. PR 57895 [Dylan Millikin ] *) mod_ssl: Save some TLS record (application data) fragmentations by including the last and subsequent suitable buckets when coalescing. [Yann Ylavic] *) mod_cache_socache: Fix a possible cached entity body corruption when it is received from an origin server in multiple batches and forwarded by mod_proxy. [Yann Ylavic] *) mod_proxy_fdpass: Fix AH01153 error when using the default configuration. In earlier version of httpd, you can explicitelly set the 'flusher' parameter to 'flush' as a workaround. (i.e. flusher=flush) Add documentation for the 'flusher' parameter when defining a proxy worker. [Christophe Jaillet] *) mod_ssl: For the "SSLStaplingReturnResponderErrors off" case, make sure to only staple responses with certificate status "good". [Kaspar Brand] *) core: Limit to ten the number of tolerated empty lines between request, and consume them before the pipelining check to avoid possible response delay when reading the next request without flushing. [Yann Ylavic] *) mod_session: Introduce SessionExpiryUpdateInterval which allows to configure the session/cookie expiry's update interval. PR 57300. [Paul Spangler ] *) core: Extend support for asynchronous write completion from the network filter to any connection or request filter. [Graham Leggett] *) mpm_event: Free memory earlier when shutting down processes. [Stefan Fritsch] *) mod_ssl: Make the output filter more friendly with deferred write and response pipelining. [Yann Ylavic, Joe Orton] *) core/util_script: relax alphanumeric filter of environment variable names on Windows to allow '(' and ')' for passing PROGRAMFILES(X86) et.al. unadulterated in 64 bit versions of Windows. PR 46751. [John ] *) mod_auth_digest: remove AuthDigestEnableQueryStringHack which is no more documented since dec 2012 (r1415960). [Christophe Jaillet] *) mod_charset_lite: On EBCDIC platforms, make sure mod_charset_lite runs after other resource-level filters. [Eric Covener] *) mod_dir: Responses that go through "FallbackResource" might appear to hang due to unterminated chunked encoding. PR58292. [Eric Covener] *) mod_substitute: Fix configuraton merge order. PR 57641 [] *) mod_ssl: When SSLVerify is disabled (NONE), don't force a renegotiation if the SSLVerifyDepth applied with the default/handshaken vhost differs from the one applicable with the finally selected vhost. [Yann Ylavic] *) http: Don't remove the Content-Length of zero from a HEAD response if it comes from an origin server, module or script. [Yann Ylavic] *) http: Add support for RFC2324/RFC7168. [Graham Leggett] *) mod_rewrite: Add support for starting External Rewriting Programs as non-root user on UNIX systems by specifying username and group name as third argument of RewriteMap directive. [Jan Kaluza] *) mod_authn_core: Add expression support to AuthName and AuthType. [Graham Leggett] *) suexec: Filter out the HTTP_PROXY environment variable because it is treated as alias for http_proxy by some programs. [Stefan Fritsch] *) mod_proxy_http: Don't establish or reuse a backend connection before pre- fetching the request body, so to minimize the delay between it is supposed to be alive and the first bytes sent: this is a best effort to prevent the backend from closing because of idle or keepalive timeout in the meantime. Also, handle a new "proxy-flushall" environment variable which allows to flush any forwarded body data immediately. PR 56541+37920. [Yann Ylavic] *) core: Define and UnDefine are no longer permitted in directory context. Previously they would always be evaulated as the configuration was read without regard for the directory context. [Eric Covener] *) config: For directives that do not expect any arguments, enforce that none are specified in the configuration file. [Joachim Zobel , Eric Covener] *) mod_rewrite: Improve 'bad flag delimeters' startup error by showing how the input was tokenized. PR 56528. [Edward Lu ] *) mod_proxy: Don't put non balancer-member workers in error state by default for connection or 500/503 errors, and honor status=+I for any error. PR 48388. [Yann Ylavic] *) mod_socache_memcache: Pass expiration time through to memcached. PR 55445. [Faidon Liambotis , Joe Orton] *) ap_expr: Add filemod function for checking file modification dates [Daniel Gruno] *) mod_authnz_ldap: Resolve crashes with LDAP authz and non-LDAP authn since r1608202. [Eric Covener] *) core: Ensure that httpd exits with an error status when the MPM fails to run. [Yann Ylavic] *) apreq: Content-Length header should be always interpreted as a decimal. Leading 0 could be erroneously considered as an octal value. PR 56598. [Chris Card ] *) mod_proxy: Now allow for 191 character worker names, with non-fatal errors if name is truncated. PR53218. [Jim Jagielski] *) mod_ssl: Add optional function "ssl_get_tls_cb" to allow support for channel bindings. [Simo Sorce ] *) mod_proxy_wstunnel: Concurrent websockets messages could be lost or delayed with ProxyWebsocketAsync enabled. [Edward Lu ] *) core, mod_info: Add compiled and loaded PCRE versions to version number display. [Rainer Jung] *) mod_authnz_ldap: Return LDAP connections to the pool before the handler is run, instead of waiting until the end of the request. [Eric Covener] *) mod_log_config: Add GlobalLog to allow a globally defined log to be inherited by virtual hosts that define a CustomLog. [Edward Lu ] *) mod_proxy_html: support automatic detection of doctype and processing of FPIs. PR56285 [Micha Lenk , Nick Kew] *) mod_proxy_html: skip documents shorter than 4 bytes PR 56286 [Micha Lenk ] *) mod_proxy_fdpass: Fix computation of the size of 'struct sockaddr_un' when passed to 'connect()'. [Graham Dumpleton ] *) core: Add ap_mpm_resume_suspended() API to allow a suspended connection to resume. PR56333 [Artem , Edward Lu ] *) core: Add ap_mpm_register_socket_callback_timeout() API. [Eric Covener] *) mod_proxy_wstunnel: Honor ProxyWebsocketIdleTimeout in asynchronous processing mode. [Eric Covener] *) mod_authnz_ldap: Fail explicitly when the filter is too long. Remove unnecessary apr_pstrdup() and strlen(). [Graham Leggett] *) Add the ldap-search option to mod_authnz_ldap, allowing authorization to be based on arbitrary expressions that do not include the username. [Graham Leggett] *) Add the ldap function to the expression API, allowing LDAP filters and distinguished names based on expressions to be escaped correctly to guard against LDAP injection. [Graham Leggett] *) Add module mod_ssl_ct, which provides an implementation of Certificate Transparency (RFC 6962) for httpd. [Jeff Trawick] *) mod_remoteip: Prevent an external proxy from presenting an internal proxy. PR 55962. [Mike Rumph] *) mod_ssl: Add hooks to allow other modules to perform processing at several stages of initialization and connection handling. See mod_ssl_openssl.h. [Jeff Trawick] *) mod_proxy_wstunnel: Avoid sending error responses down an upgraded websockets connection as it is being close down. [Eric Covener] *) mod_proxy_wstunnel: Allow the administrator to cap the amount of time a synchronous websockets connection stays idle with ProxyWebsocketIdleTimeout. [Eric Covener] *) mod_proxy_wstunnel: Change to opt-in for asynchronous support, adding directives ProxyWebsocketAsync and ProxyWebsocketAsyncDelay. [Eric Covener] *) mod_proxy_wstunnel: Stop leaking websockets backend connections under event MPM (trunk-only). [Eric Covener] *) mod_proxy_http: Add detach_backend hook (potentially usable in other proxy scheme handlers). [Jeff Trawick] *) mod_deflate: Add DeflateAlterETag to control how the ETag is modified. The 'NoChange' parameter mimics 2.2.x behavior. PR 45023, PR 39727. [Eric Covener] *) mod_rewrite: Add 'BNF' (backreferences-no-plus) flag to RewriteRule to allow spaces in backreferences to be encoded as %20 instead of '+'. [Eric Covener] *) mod_rewrite: Support an optional list of characters to escape in the argument for the 'B' (escape backreferences) flag. [Eric Covener] *) mod_dir: Default to 2.2-like behavior and skip execution when method is neither GET nor POST, such as for DAV requests. PR 54914. [Chris Darroch] *) mod_rewrite: Rename the handler that does per-directory internal redirects to "rewrite-redirect-handler" from "redirect-handler" so it is less ambiguous and less likely to be reused. [Eric Covener] *) mod_rewrite: Protect against looping with the [N] flag by enforcing a default limit of 10000 iterations, and allowing each rule to change its limit. [Eric Covener] *) mod_ssl: Fix config merging of SSLOCSPEnable and SSLOCSPOverrideResponder. [Jeff Trawick] *) Add HttpContentLengthHeadZero and HttpExpectStrict directives. [Yehuda Sadeh , Justin Erenkrantz] *) mod_ssl: Add -t -DDUMP_CA_CERTS option which dumps the filenames of all configured SSL CA certificates to stdout the same way as DUMP_CERTS does. [Jan Kaluza] *) mod_ssl: Don't flush when an EOS is received. Prepares mod_ssl to support write completion. [Graham Leggett] *) core: Add parse_errorlog_arg callback to ap_errorlog_provider to allow providers to check the ErrorLog argument. [Jan Kaluza] *) mod_cgid: Use the servers Timeout for each read from a CGI script, allow override with new CGIDRequestTimeout directive. PR43494 [Eric Covener, Toshikuni Fukaya ] *) core: ensure any abnormal exit is reported to stderr if it's a tty. PR 55670 [Nick Kew] *) mod_lua: Let the Inter-VM get/set functions work with a global shared memory pool instead of a per-process pool. [Daniel Gruno] *) ldap: Support ldaps when using the Microsoft LDAP SDK. PR 54626. [Jean-Frederic Clere] *) mod_authnz_ldap: Change default value of AuthLDAPMaxSubGroupDepth to 0 to avoid performance problems when subgroups aren't in use. [Eric Covener] *) mod_syslog: New module implementing syslog ap_error_log provider. Previously, this code was part of core, now it's in separate module. [Jan Kaluza] *) core: Add ap_errorlog_provider to make ErrorLog logging modular. Move syslog support from core to new mod_syslog. [Jan Kaluza] *) mod_status, mod_echo: Fix the display of client addresses. They were truncated to 31 characters which is not enough for IPv6 addresses. PR 54848 [Bernhard Schmidt ] *) mod_unique_id: Use output of the PRNG rather than IP address and pid, avoiding sleep() call and possible DNS issues at startup, plus improving randomness for IPv6-only hosts. [Jan Kaluza ] *) mod_file_cache: mod_file_cache should be able to serve files that haven't had a Content-Type set via e.g. mod_mime. [Eric Covener] *) core: merge AllowEncodedSlashes from the base configuration into virtual hosts. [Eric Covener] *) AIX: Install DSO's with "cp" instead of "install" in instdso.sh [Eric Covener] *) mod_ldap: Don't keep retrying if a new LDAP connection times out. [Eric Covener] *) mod_deflate: permit compilation of mod_deflate against a zlib that has been configured with -D Z_PREFIX, which redefines the token "deflate". [Eric Covener] *) mod_auth_digest: Use the secret when generating nonces in all cases and not only when AuthName is used in .htaccess files (this change may cause problems if used with round robin load balancers). Don't regenerate the secret on graceful restarts. PR 54637 [Stefan Fritsch] *) core: Remove apr_brigade_flatten(), buffering and duplicated code from the HTTP_IN filter, parse chunks in a single pass with zero copy. Reduce memory usage by 48 bytes per request. [Graham Leggett] *) core: Stop the HTTP_IN filter from attempting to write error buckets to the output filters, which is bogus in the proxy case. Create a clean mapping from APR codes to HTTP status codes, and use it where needed. [Graham Leggett] *) mod_proxy: Ensure network errors detected by the proxy are returned as 504 Gateway Timout as opposed to 502 Bad Gateway, in order to be compliant with RFC2616 14.9.4 Cache Revalidation and Reload Controls. *) mod_dav: mod_dav overrides dav_fs response on PUT failure. PR 35981 [Basant Kumar Kukreja , Alejandro Alvarez ] *) mod_ldap: LDAP connections used for authentication were not respecting LDAPConnectionPoolTimeout. PR 54587 *) core: ap_rgetline_core now pulls from r->proto_input_filters. *) mod_proxy_html: process parsed comments immediately. Fixes bug where parsed comments may be lost. [Nick Kew] *) mod_proxy_html: introduce doctype for HTML 5 [Nick Kew] *) mod_proxy_html: fix typo-bug processing "strict" vs "transitional" HTML/XHTML [Nick Kew] *) core: Add option to add valgrind support. Use it to reduce false positive warnings in mod_ssl. [Stefan Fritsch] *) mod_authn_file, mod_authn_dbd, mod_authn_dbm, mod_authn_socache: Cache the result of the most recent password hash verification for every keep-alive connection. This saves some expensive calculations. [Stefan Fritsch] *) http: Remove support for Request-Range header sent by Navigator 2-3 and MSIE 3. [Stefan Fritsch] *) core, http: Extend HttpProtocol with an option to enforce stricter HTTP conformance or to only log the found problems. [Stefan Fritsch] *) core: Correctly parse an IPv6 literal host specification in an absolute URL in the request line. [Stefan Fritsch] *) EventOpt MPM *) core: Add LogLevelOverride directive that allows to override the loglevel for clients from certain IPs. This also works for things like the SSL handshake where LogLevel ... is evaluated too late. [Stefan Fritsch] *) core: Add new directive Warning to issue warnings from a configuration file. Both Warning and Error now generate a timestamped log message. [Fabien Coelho] *) ap_expr: Add SERVER_PROTOCOL_VERSION, ..._MAJOR, and ..._MINOR variables. [Stefan Fritsch] *) core: New directive RegisterHttpMethod for registering non-standard HTTP methods. [Stefan Fritsch] *) core: New directive HttpProtocol which allows to disable HTTP/0.9 support. [Stefan Fritsch] *) mod_allowhandlers: New module to forbid specific handlers for specific directories. [Stefan Fritsch] *) mod_systemd: New module, for integration with systemd on Linux. [Jan Kaluza ] *) WinNT MPM: Store pid and generation for each thread in scoreboard to allow tracking of threads from exiting children via mod_status or other such mechanisms. [Jeff Trawick] *) The following now respect DefaultRuntimeDir/DEFAULT_REL_RUNTIMEDIR: - APIs: ap_log_pid(), ap_remove_pid, ap_read_pid() - mod_cache: thundering herd lock directory - mod_lbmethod_heartbeat, mod_heartmonitor: heartbeat storage file - mod_ldap: shared memory cache - mod_socache_shmcb, mod_socache_dbm: shared memory or dbm for cache [Jeff Trawick] *) suexec: Add --enable-suexec-capabilites support on Linux, to use setuid/setgid capability bits rather than a setuid root binary. [Joe Orton] *) suexec: Add support for logging to syslog as an alternative to logging to a file; configure --without-suexec-logfile --with-suexec-syslog. [Joe Orton] *) mod_ssl: Add support for TLS Next Protocol Negotiation. PR 52210. [Matthew Steele ] *) cross-compile: allow to provide CC_FOR_BUILD so that gen_test_char will be compiled by the build compiler instead of the host compiler. Also set CC_FOR_BUILD to 'cc' when cross-compilation is detected. PR 51257. [Guenter Knauf] *) core: In maintainer mode, replace apr_palloc with a version that initializes the allocated memory with non-zero values, except if AP_DEBUG_NO_ALLOC_POISON is defined. [Stefan Fritsch] *) mod_policy: Add a new testing module to help server administrators enforce a configurable level of protocol compliance on their servers and application servers behind theirs. [Graham Leggett] *) mod_firehose: Add a new debugging module able to record traffic passing through the server in such a way that connections and/or requests be reconstructed and replayed. [Graham Leggett] *) mod_noloris *) APREQ *) Simple MPM *) mod_serf [Apache 2.5.0-dev includes those bug fixes and changes with the Apache 2.4.xx tree as documented below, except as noted.] Changes with Apache 2.4.x and later: *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/CHANGES?view=markup Changes with Apache 2.2.x and later: *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.2.x/CHANGES?view=markup Changes with Apache 2.0.x and later: *) http://svn.apache.org/viewvc/httpd/httpd/branches/2.0.x/CHANGES?view=markup