Newer
Older
*) Fix a bug which would cause the response headers to be omitted
when sending a negotiated ErrorDocument because the required
filters were attached to the wrong request_rec.
*) Remove commas from the end of the macros that define
directives that are used by MPMs. Prior to this patch,
you would use these macros without commas, which was unlike
the macros for any other directives. Now, the caller provides
the comma rather than the macro providing it. This makes
the macros look more like the rest of the directives.
[Ryan Bloom and Cliff Woolley]
*) Add 'redirect-carefully' environment option to disable sending
redirects under special circumstances. This is helpful for
Microsoft's WebFolders when accessing a directory resource via
DAV methods. [Justin Erenkrantz]
*) Begin to abstract out the underlying transport layer.
The first step is to remove the socket from the conn_rec,
the server now lives in a context that is passed to the
core's input and output filters. This forces us to be very
careful when adding calls that use the socket directly,
because the socket isn't available in most locations.
[Ryan Bloom]
*) Really reset the MaxClients value in worker and threaded
when the configured value is not a multiple of the number
of threads per child. We said we did previously but we
forgot to. [Jeff Trawick]
*) If shared modules are requested and mod_so is not available,
produce a fatal config-time error. [Justin Erenkrantz]
*) Improve http2env's performance by cutting the work it has to
*) use new 'apr_hash_merge' function in mod_mime (performance fix)
Changes with Apache 2.0.28
*) Fix infinite loop in mod_cgid.c.
[Dale Ghent <daleg elemental.org>, Brian Pane <bpane pacbell.net>]
*) When no port is given in a "ServerName host" directive, the
server_rec->port is now set to zero, not 80. That allows for
run-time deduction of the correct server port (depending on
SSL/plain, and depending also on the current setting of
UseCanonicalName). This change makes redirections
work, even with https:// connections. As in Apache-1.3, the
connection's actual port number is never used, only the ServerName
setting or the client's Host: setting. Documentation updated
to reflect the change. [Martin Kraemer]
*) Add a '%{note-name}e' argument to mod-headers, which works in
the same way as mod_log_confg. [Ian Holsman]
*) Fix the spelling of the AP_MPMQ_MIN_SPARE_DAEMONS and
AP_MPMQ_MAX_REQUESTS_DAEMON macros in ap_mpm.h and all standard
MPMs. [Cliff Woolley]
*) Introduce htdbm, a user management utility for db/dbm authorization
*) Optimize usage of strlen and strcat in ap_directory_walk.
Changes with Apache 2.0.27
*) Introduce an Apache mod_ssl initial configuration template
(ssl.conf, generated from ssl-std.conf). [Ralf S. Engelschall]
*) Fixed a memory leak in the getline parsing code that could
be triggered by arbitrarily large header lines. Requests
from the core input filter for single lines are now limited
to HUGE_STRING_LEN (8192 bytes). [Aaron Bannert]
*) Fix a truncation bug in how we print the port on the Via: header.
The routine that prints the Via: header now takes a length for
*) Some syntax errors in mod_mime_magic's magic file can result
in a 500 error, which previously was unlogged. Now we log the
error. [Jeff Trawick]
*) Add the support/checkgid helper app, which checks the run-time
validity of group identifiers usable in the Group directive.
[Ken Coar]
*) Various --enable-so options have been fixed: --enable-so is
treated as "static"; explicit --enable-so=shared issues an error;
and explicit --enable-so fails with error on systems without
APR_HAS_DSO. [Aaron Bannert]
*) Fix a segfault in the core input filter when the client socket
gets disconnected unexpectedly. [Cliff Woolley]
*) Fix the reporting for child processes that die. This removes
all of the non-portable W* macros from Apache.
[Jeff Trawick and Ryan Bloom]
*) Win32: Track and display "Parent Server Generation:" in
mod_status output. The generation will be bumped at
server graceful restart, when the child process exits
by hitting MaxRequestsPerChild or if the child
process exits abnormally. [Bill Stoddard]
*) Win32: Fix problem where MaxRequestsPerChild directive was
not being picked up in favor of the default. Enable
the parent to start up a new child process immediately upon
the old child starting shutdown.
[Bill Stoddard]
*) Fix some bungling of the remote port in rfc1413.c so that
IdentityCheck retrieves the proper user id instead of failing
and thus always returning "nobody."
*) Simplified mod_env's directives to behave as most directives are
expected, in that UnsetEnv will not unset a SetEnv and PassEnv
directive following that UnsetEnv within the same container.
Also provides a runtime startup warning if a PassEnv configured
environment value is undefined. [William Rowe]
*) The worker MPM is now completely ported to APR's new lock API. It
uses native APR types for thread mutexes, cross-process mutexes,
and condition variables. [Aaron Bannert]
*) Sync up documentation to remove all references to the now deprecated
Port directive. [Justin Erenkrantz]
*) Moved all ldap modules from the core to httpd-ldap sub-project
[Ryan Bloom]
*) Exit when we can't listen on any of the configured ports. This
is the same behavior as 1.3, and it avoids having the MPMs to
deal with bogus ap_listen_rec structures. [Jeff Trawick]
*) Cleanup the proxy code that creates a request to the origin
server. This change adds an optional hook, which allows modules
to gain control while the request is created if the proxy module
is loaded. The purpose of this hook is to allow modules to add
input and/or output filters to the request to the origin. While
I was at it, I made the core use this hook, so that proxy request
creation uses some of the code from the core. This can still be
greatly improved, but this is a good start. [Ryan Bloom]
*) Port the MaxClients changes from the worker MPM to the threaded
MPM. [Ryan Bloom]
*) Fix mod_proxy so that it handles chunked transfer-encoding and works
with the new input filtering system. [Justin Erenkrantz]
*) Introduce the MultiviewsMatch directive, to allow the operator
to be flexible in recognizing Handlers and Filters filename
extensions as part of the Multiviews matching logic, strict with
MultiviewsMatch NegotiatedOnly to accept only filename extentions
that designate negotiated parameters, (content type, charset, etc.)
or MultiviewsAll for the 1.3 behavior of matching any files, even
if they have unregistered extensions. [William Rowe]
*) Fixed the configure script to add a LoadModule directive to
the default httpd.conf for any module that was compiled
*) rewrite mod_ssl input filtering to work with the new input filtering
system. [Justin Erenkrantz]
*) prefork: Don't segfault when we are able to listen on some but
not all of the configured ports. [Jeff Trawick]
*) Build mod_so even if no core modules are built shared.
*) Introduce ap_directory_walk rewrite (with further optimizations
required) to adapt to the ap_process_request_internal() changes.
Optimized so subrequests and redirects now reuse previous section
merges, until we mismatch with the original directory_walk, and
precomputed r->finfo results will cause directory_walk to skip
the most expensive phases of the function. [William Rowe]
*) Remove the Port directive. In it's place, the Listen directive
is now a required directive, which tells Apache what port to
listen on. The ServerName directive has also been extended
to accept an optional port. If the port is specified to the
ServerName, the server will report that port whenever it
reports the port that it is listening on. This change was
made to ease configuration errors that stem from having a Port
directive, and a Listen directive. In that situation, the server
would only listen to the port specified by the Listen command,
which caused a lot of confusion to users. [Ryan Bloom]
*) Added mod_mime_magic, mod_unique_id and mod_vhost_alias to the Win32
build, as loadable modules. [William Rowe]
*) Fix --enable-mods-shared processing. If most is specified,
then all modules that can be compiled as shared modules are.
*) Update the mime.types file to map video/vnd.mpegurl to mxu
and add commonly used audio/x-mpegurl for m3u extensions.
*) Eliminate the depreciated r->content_language, in favor of the array
r->content_languages introduced many years ago. Module authors must
substantially overhaul their modules, so this needs to be upgraded
if the module still relied on backwards-brokeness. [William Rowe]
*) Allow configure help strings to work with autoconf 2.50+ and 2.13.
[Justin Erenkrantz]
*) Rewrite the input filtering mechanisms to consolidate and reorganize
code. In short, core_input_filter does something now and
ap_http_filter is now only concerned with HTTP. [Justin Erenkrantz]
*) Update the Win32 build to re-absorb mod_proxy and family.
[William Rowe]
*) Resolved the build failure on Win32 using MSVC 5.0 (without the
current SDK.) [William Rowe]
*) Some style changes to the code that does ProxyErrorOverride. Fixed
config merge behaviour. [Graham Leggett]
*) Allow support programs to be compiled against a static version
of libapr. This allows the smaller support programs to be
*) Update the mime.types file to the registered media types as
of 2001-09-25, and add mapping for xsl extension [Mark Cox]
*) Fix MaxClients in the Worker MPM, so that it specifies the maximum
number of clients that can connect at the same time, instead of
specifying the maximum number of child processes.
*) Switch proc_pthread AcceptMutex configuration directive to pthread to
be consistent with 1.3. [Justin Erenkrantz]
Justin Erenkrantz
committed
*) Cache apr_explode_localtime() value for 15 seconds.
Justin Erenkrantz
committed
*) Fix mod_include to not return ETag or Last-Modified headers.
*) Fix worker MPM's scoreboard logic. [Aaron Bannert <aaron clove.org>]
Justin Erenkrantz
committed
*) Eliminate the wasteful run-time conversion of method names from strings
to numbers in places where the methods are known at compile time.
Justin Erenkrantz
committed
*) Turn the worker MPM's queue into a LIFO. This may
improve cache-hit performance under some conditions.
*) Switch back to SIGUSR1 for graceful restarts on all platforms that
support it. [Justin Erenkrantz]
*) Cleanup the worker MPM. We no longer re-use transaction
pools. This incurs less overhead than shuffling the pools
around so that they can be re-used. Remove one of the
queue's condition variables. We just redefined the API to
state that you can't try to add more stuff than you allocated
*) Fixed persistent connections when a request contains a body.
[Greg Stein]
*) mod_dav uses a new API to speak to the backend provider for dead
property management. [Greg Stein]
*) Remove the Win32 script-processing exception from mod_cgi, and
roll build_command_line/build_argv_list into a unified, overrideable
ap_cgi_build_command optional function. [William Rowe]
*) Rewrite find_start_sequence to use a better search algorithm
to find the start tag. [Justin Erenkrantz]
*) Fix a seg fault in mod_include. When we are generating an
internal redirect, we must set r->uri to "", not a bogus
string, and not NULL. [Ryan Bloom]
*) Optimized location_walk, so subrequests, redirects and second passes
now reuse previous section merges on a <Location > by <Location >
basis, until we mismatch with the original location_walk.
[William Rowe]
*) Back out the 1.45 change to util_script.c. This change made
us set the environment variable REQUEST_URI to the redirected
URI, instead of the originally requested URI.
*) Make mod_include do lazy evaluation of potentially expensive to
*) Fix logging of bytes sent for HEAD requests. %b and %B should
log either - or 0, before this patch, they were both logging
*) Make mod_include check for BYTE_CHECK_THRESHOLD per bucket rather
*) Normalize the primary request, redirects and sub-requests to
run the same ap_process_request_internal for consistency in
robustness, behavior and security. [William Rowe]
*) Fix a segfault with mod_include when r->path_info is not set
*) Add -X functionality back. This indicates to all MPMs and any other
part of Apache that it should run in "debug" mode. [Justin Erenkrantz]
*) Some initial support for the cygwin platform [prefork only].
This is not to be confused with support for the WinNT/Win32
platform, which is the recommended configuration for native
Win32 users. The cygwin platform support is recommended for
*) Changed syntax of Set{Input|Output}Filter. The list of filters
must be semicolon delimited (if more than one filter is given.)
The Set{Input|Output}Filter directive now overrides a parent
container's directive (e.g. SetInputFilter in <Directory /web/foo>
will override any SetInputFilter directive in <Directory /web>.)
This new syntax is more consistent with Add{Input|Output}Filter
directives defined in mod_mime. Also cures a bug in prior releases
where the Set{Input|Output}Filter directive would corrupt the
global configuration if the multiple directives were nested.
[William Rowe]
*) Cured what's ailed mime for quite some time. If an AddSomething
was given in the configuration (Language, Charset, Handler or
Encoding) Apache would set the content type as given by AddType,
but refused to check the mime.types file if AddType wasn't given
for that specific extension. Setting the AddHandler for .html
without setting the AddType text/html html would cause Apache to
use the default content type. [William Rowe]
*) Added some bulletproofing to memory allocation in the LDAP cache
code. [Graham Leggett]
Changes with Apache 2.0.25
*) Move the installed /manual directory out of the /htdocs/ tree, so
that it can be kept more independently from the remaining document
root. The "Alias /manual ..." already allowed for easy projection
into existing private document trees. [Martin Kraemer]
*) Add specified user attributes to the environment when using
mod_auth_ldap. This allows you to use mod_include to embed specified
user attributes in a page like so:
Hello <!--#echo var="AUTHENTICATE_CN"-->, how are you?
[Graham Leggett]
*) Fix a performance problem with the worker MPM. We now create
transaction pools once, and re-use them for each connection.
*) Modfied mod_mime to prevent mod_negotation from serving a multiview
of a 'handler' or 'filter', so that any filename extension that does
not contribute to the negotiated metadata can't be served without
an explicit request. E.g., if the .Z extension is associated with
an unzip filter, the user request somefile.Z.html, mod_negotiation
won't serve it. It can serve somefile.Z.html when somefile.Z is
requested, since the .Z extension is explictly requested, if the
.html extension is associated with ContentType text/html.
[William Rowe]
*) Introduce the AddInputFilter filter[;filter...] ext [ext...]
and corresponding AddOutputFilter syntax, to insert one or more
filters by mod_mime filename extension processing.
[William Rowe]
*) Fix a growing connection pool in core_output_filter() for
keepalive requests. [Jeff Trawick]
*) Moved split_and_pass_pretag_buckets back to being a
macro at Ryans's request. Removed the return from it
by setting and returning a return code instead. Updated
the code to check the return code from the macro and
*) Fix a segfault when a numeric value was received for Host:.
[Jeff Trawick]
*) Add a function ap_remove_input_filter. This is to match
up with ap_remove_output_filter. [Ryan Bloom]
*) Clean up location_walk, so that this step performs a minimum
amount of redundant effort (it must be run twice, but it will no
longer reparse all <Location > blocks when the request uri
hadn't changed.) [William Rowe]
*) Eliminate proxy: (and all other 'special') processing from the
ap_directory_walk() phase. Modules that want to use special
walk logic should refer to the mod_proxy map_to_location example,
with it's proxy_walk and proxysection implementation. This makes
either directory_walk flavor much more legible, since that phase
only runs against real <Directory > blocks.
[William Rowe]
*) SECURITY: Fix a security problem in mod_include which would allow
an SSI document to be passed to the client unparsed.
[Cliff Woolley, Brian Pane]
*) Introduce the map_to_storage hook, which allows modules to bypass
the directory_walk and file_walk for non-file requests. TRACE
shortcut moved to http_protocol.c as APR_HOOK_MIDDLE, and the
directory_walk/file_walk happen as APR_HOOK_VERY_LAST in core.c.
[William Rowe]
*) Add the ability for mod_include to add the INCLUDES filter
if the file is configured for the server-parsed handler.
This makes the configuration for .shtml files much easier
to understand, and allows mod_include to honor Apache 1.3
config files. Based on Doug MacEachern's patch to PHP
to do the same thing. [Ryan Bloom]
*) force OpenSSL to ignore process local-caching and to always
get/set/delete sessions using mod_ssl's callbacks
[Madhusudan Mathihalli <madhusudan_mathihalli hp.com>,
Geoff Thorpe <geoff geoffthorpe.net>]
*) Make the worker MPM shutdown and restart cleanly. This also
cleans up some race conditions, and gets the worker using
*) Implement CRYPTO_set_locking_callback() in terms of apr_lock
for mod_ssl
*) Fix for mod_include. Ryan's patch to check error
codes put a return in the wrong place. Also, the
include handler return code wasn't being checked.
I don't like macros with returns, so I converted
SPLIT_AND_PASS_PRETAG_BUCKETS into a function.
*) fix segv in mod_mime if no AddTypes are configured
*) Enable ssl client authentication at SSL_accept time
*) Fix a segfault in mod_include when the original request has no
associated filename (e.g., we're filtering the error document for
a bad URI). [Jeff Trawick]
*) Fix a storage leak (a strdup() call) in mod_mime_magic. [Jeff Trawick]
*) The prefork and OS/2 MPMs are overwriting the pid file when a second copy
of httpd is started and shuts down due to socket conflict. Moving the
call to ap_log_pid solves the problem.
*) Changed the late-1.3 log_config substitution %c to %X, to log the
status of the closed connection, as it conflicts with the far more
common, historical ssl logging directive %...{var}c. [William Rowe]
*) Added the common error/ tree to the build/install targets
(similar to the common icons/ tree) for the multi-language error
messages that Lars committed earlier. [William Rowe]
*) Added a multi process, multi threaded OS/2 MPM mpmt_os2. [Brian Havard]
*) Added a default commented-out mod_ldap and mod_auth_ldap
configuration to httpd-std.conf and httpd-win.conf
[Graham Leggett]
*) Added documentation for mod_ldap and mod_auth_ldap.
[Graham Leggett]
*) Enabled negative caching on attribute comparisons in the LDAP cache.
Fixed a problem where the default cache TTL was set in milliseconds
not microseconds causing the cache to time out almost immediately.
[Graham Leggett]
*) Fixed all the #if APR_HAS_SHARED_MEMORY checks within the LDAP
module code to follow APR. [Graham Leggett]
*) Fixed LDAP cleanup on graceful restarts. LDAP connections are now
cleaned up when the connection pool pool is cleaned up.
[Graham Leggett]
*) Fix a minor issue with Jeff Trawick's mod_include
patch. Without this patch, the code will just allocate
more bytes in get_combined_directive than are needed.
[Paul Reder]
*) Added the LDAP authentication module mod_auth_ldap.
*) Added the LDAP cache and connection pooling module mod_ldap.
*) Fix --enable-modules=all breakage with mod_auth_db and mod_auth_digest
by allowing a module to disable itself if its prerequisites are not
met. [Justin Erenkrantz]
*) Fix a couple of issues in mod_include when the tag appeared at
offsets near 8192 in the file being parsed. [Jeff Trawick]
*) Fix an assertion failure in mod_ssl when the keepalive timeout is
reached. [Jeff Trawick]
*) Numerous improvements to the Win32 build system. Introduced command line
builds without requiring .mak files for MSVC 6.0 and later versions.
Improved .dsp file compatibility for both Visual Studio 5.0 and 6.0 users.
[William Rowe]
*) Assorted corrections and improvements to the winnt_mpm startup code. Better
reporting of uninstalled services and other error conditions, and changed the
default service name to Apache2. [William Rowe]
*) Numerous improvements to the Win32 ApacheMonitor utility, including winnt_mpm
compatibility with existing Apache 1.3 Win32 Apache management utilites.
*) Fixed the segfaults in mod_mime introduced by hash tables in 2.0.20.
[William Rowe, Greg Ames]
*) Rounded out the mod_mime Add/Remove pairs by adding RemoveLanguage
and RemoveCharset directives. [William Rowe]
*) The Unix MPMs other than perchild now allow child server
processes to use the accept mutex when starting as root and
using SysV sems for the accept mutex. Previously, this
combination would lead to fatal errors in the child server
processes. perchild can't use SysV sems because of security
issues. [Jeff Trawick, Greg Ames]
*) Added Win32 revision stamp resources to all http binaries
(including modules/ and support/ tools.) PR7322 [William Rowe]
*) Fix ap_rvprintf to support more than 4K of data at one time.
*) We have always used the obsolete/deprecated Netscape syntax
for our tracking cookies; now the CookieStyle directive
allows the Webmaster to choose the Netscape, RFC2109, or
RFC2965 format. The new CookieDomain directive allows the
setting of the cookie's Domain= attribute, too. PR #s 5006,
5023, 5920, 6140 [Ken Coar]
*) Tweak server/Makefile so that the rules for generating exports.c
are compatible with make utilities which don't expand wildcards
in a dependency list (e.g., OS/390 make, certain levels of GNU
make). [Jeff Trawick]
*) Install the SSL headers. [John Sterling <sterling covalent.net>]
*) Begin to sanitize the MPM configuration directives. Now, all
MPMs use the same functions for all common MPM directives. This
should make it easier to catch all bugs in these directives once.
*) Close a major resource leak. Every time we had issued a
graceful restart, we leaked a socket descriptor.
[Ryan Bloom]
*) Fix a problem with the new method code. We need to cast
the 1 to an apr_int64_t or it will be treated as a 32-bit
integer, and it will wrap after being shifted 32 times.
[Cody Sherr <csherr covalent.net> and Ryan Morgan <rmorgan covalent.net>]
*) Fix a bug in mod_expires. Previous to this patch, if you
told mod_expires to add 604800 seconds to the last-modified
time, it actually added 604800 usec's to the last-modified time,
so that when looking at the response it looked like nothing
had been done. The root of the problem was that we always compute
time in usec's, but we ask users to input sec's. This means we
need to convert to usec's before using those values.
[Ryan Bloom]
*) The worker MPM now handles shutdown and restart requests. It
definitely isn't perfect, but we do stop the servers correctly.
The biggest problem right now is that SIGHUP causes the server to
just die. [Ryan Bloom]
*) Use the prefork MPM by default on Unix. [various]
*) Added a systray icon monitor application for Win32.
*) mod_rewrite: Fix the line ending on some non-Unix systems for
messages written to the rewrite log.
*) All mod_autoindex query parsing is now quietly quashed with the
IndexOption IgnoreClient. The IndexOption SuppressColumnSorting
still drops the column sort <a href>'s for the column headers, but
IgnoreClient is required to ignore these Query options entirely.
[William Rowe]
*) Introduced new mod_autoindex query argument parsing for F=[0|1|2]
to allow the client to select plain, FancyIndexing or HTMLTable
formatting, V=[0|1] to inhibit or enable version sorting, and
P=pattern to return only specific files. The old Query Arguments
were reorganized as C=f for sorting column 'f' (same N, D, S, or M
as before), and O=A|D for ordering ascending or descending.
[William Rowe]
*) Fixed an error in mod_include's directive parsing routines which
caused #if, #elif, and #else expressions containing backslashes
to be improperly evaluated. [Cliff Woolley]
*) Introduced new mod_autoindex IndexOptions flags: SuppressIcon to
drop the icon column, SuppressRules to drop the <hr> elements,
and HTMLTable to create rudimentary HTML table listings (implies
FancyIndexing). [William Rowe]
*) Re-introduced the mod_autoindex IndexOptions flag TrackModified
from Apache 1.3.15. This is needed for two reasons, first, given
multiple machines within a server farm, ETags and Last-Modified
stamps won't correspond from machine to machine, and second, many
Unixes don't capture changes to the date or time stamp of existing
files, since these don't modify the dirent itself. [William Rowe]
*) Re-introduced the mod_autoindex IndexOptions flag FoldersFirst
and DirectoryWidth options from Apache 1.3.10.
[William Rowe, Ken Coar]
*) Eliminated FancyIndexing directive, deprecated early in Apache
1.3 by the IndexOptions FancyIndexing syntax. [William Rowe]
an error, other than a success or redirect. Also optimized
the parent directory, always included except in the URI '/'.
[William Rowe]
*) Refactored mod_negotiation and mod_mime to help mod_dir accept
negotiated index pages, and prevent the server from defaulting
to an autoindex of the directory. mod_negotiation will now die
with a 500 Internal Error if it could match some filenames
(e.g. for mod_dir) but none can be served. mod_negotation now
refuses to serve any file with an extention that mod_mime doesn't
recognize, and wasn't part of the request. [William Rowe]
*) Eliminate mod_cgi's handling of .exe files without the .exe file
extension. This is already handled by multiviews, if the admin
wishes to AddHandler .exe or define a content type handler and
associate .exe files with that content type. Multiviews must be
enabled to allow these to be served. [William Rowe]
*) Speed up the server's response to a spike in incoming workload
or restarts by assigning empty scoreboard slots to new processes
when they are available. [Greg Ames]
*) Add a handler to mod_includes.c. This handler is designed to
implement the XbitHack directive. This can't be done with a
fixup, because we need to check the content-type, which is
only available in the handler phase. [Ryan Bloom]
*) Make the includes filter check return codes from filters lower in
the filter chain. If a lower level filter returns an error, then
the request needs to stop immediately. This allows mod_include to
stop parsing data once a lower filter recognizes an error.
[Ryan Bloom]
*) Add the ability to extend the methods that Apache understands
and have those methods <limit>able in the httpd.conf. It uses
the same bit mask/shifted offset as the original HTTP methods
such as M_GET or M_POST, but expands the total bits from an int to
an ap_int64_t to handle more bits for new request methods than
*) Fix broken mod_mime behavior in merging its arguments. Possible
cause of unexplicable crashes introduced in 2.0.20. [William Rowe]
*) Solve many mod_ssl porting issues (too many to detail) with
help from the whole team, but most notably [Ralf S. Engelschall,
*) More stall fixes for the threaded & worker mpm's.
Make mod_status output more accurate. Don't
count workers in processes which aren't actively
serving requests. [Greg Ames]
*) Win32: Get SSI exec cgi tag working. [Bill Stoddard]
*) Add a single listener/multiple worker MPM. This MPM is
definately not fully correct, but it allows us to solve many
of the problems that exist in the threaded MPM. This is a
modified version of the threaded MPM. [Ryan Bloom]
*) Improve content generation throughout Apache, providing closer
compliance with HTML 3.2, HTML 4.01 Transitional and XHTML 1.0
Transitional specifications. [William Rowe]
*) Fix a problem where the threaded MPM stalls after restarts or
segfaults. Also prevent multiple active processes from using
the same scoreboard slot. [Greg Ames]
*) Apache/Win32 now fills in the service description with Apache's
server version string, including loaded and advertised modules.
[William Rowe]
*) Improved support for the Win32 build, to recover gracefully from
missing apr or apr-util directories or the awk interpreter,
create the proper cgi-bin examples, including a test-cgi.bat, and
fix the perl shebang line for printenv.pl, when installing from
the build environment. [William Rowe]
*) Fix a segfault in threaded.c caused by passing uninitialized
apr_thread_t * to apr_thread_join(). [Jeff Trawick]
*) Use new APR number conversion functions to reduce CPU consumption
when setting the content length, and in mod_log_config.
[Brian Pane]
where HEAD response headers were being repeated twice for
files greater than 32K bytes (4*AP_MIN_BYTES_TO_WRITE). This
problem in the http_header filter was exposed by the recent rewrite
of the content_length filter. [Taketo Kabe, Bill Stoddard]
*) Fix seg faults in mod_status with ExtendedStatus enabled, after
restarts. A garbage pointer to a vhost's server_rec from the
previous generation was being left around under certain
conditions. [Greg Ames]
*) Fix a cosmetic problem with mod_include. Non-existant SSI vars
used to appear as '(none', without the closing paren.
[Günter Knauf <eflash gmx.net>]
*) Improve the exports generating awk script. In the past, we had
work around problems in the awk script by avoiding some #if and
#ifdefs. This has bitten us many times in generating the exports.c
file. This improvement allows corrects the header file parsing.
Changes with Apache 2.0.21
*) Resolve the Win32 htpasswd bug, where a file that existed would be
overwritten, regardless of the -c flag.
*) Introduce connection sub-pools into ab. Truncating the lifetime
of these allocations means that ab no longer perpetually grows
its working set, running out of memory on large request attempts.
[William Rowe]
*) Make scoreboard creation a hook. This allows management
modules to have access to the scoreboard at the time that it is
created, and at every restart request.
*) Changed AP_MPMQ_MAX_DAEMONS to refer to MaxClients and
added an AP_MPMQ_MAX_DAEMON_USED to refer to the highest
daemon index actually used in the scoreboard. I also
updated the pertinent calls. [Paul J. Reder]
*) Win32: Prevent listening sockets from being inherited by
the Apache child process, CGI scripts, rotatelog process
etc. If the Apache child process segfaults, any processes
that the child started are not reaped. Prior to this fix,
these processes inherited the listening sockets which sometimes
prevented the restarted Apache child process from accepting
connections (ie, the server would hang).
[Bill Stoddard]
*) Provide vhost and request strings when ExtendedStatus is on.
[Greg Ames]
*) Fix some issues with the pod and prefork: check the pod *after*
processing a connection so that a server processing a time-
consuming request bails out as soon as practical; when the
parent process wakes up a server process via connect(), use an
APR timeout on the connect() so that we don't hang for a long
time if there aren't server processes around to do accept().
[Jeff Trawick, Greg Ames]
*) Performance improvement to mod_mime.c. find_ct() in mod_mime,
spends a lot of time in apr_table_get calls. Using the default
httpd.conf, the tables for languages and charsets are somewhat
large, so the time spent scanning them on each request is
significant. Replacing the tables with hash tables provides
*) Add two functions to allow modules to access random parts of the
scoreboard. This allows modules compiled for one MPM to access the
scoreboard, even if it the server was compiled for another MPM.
*) Fix problem in content-length filter where the filter would
buffer all the output from a CGI before sending any bytes
down the filter stack to the network. This problem would cause
significant memory consumption if the CGIs generated
lots of bytes. [Bill Stoddard]
*) Get non-blocking CGI pipe reads working with the bucket brigades.
[Bill Stoddard]
*) Fix seg fault on Windows when serving files cached with mod_file_cache.
[Bill Stoddard]
*) Fix a bug in the threaded MPM that would cause it to kill off all
workers immediately after starting if the number of workers started
was above a certain threshold. [Ryan Bloom, Bill Stoddard]
*) Fix problem with threaded MPM. The problem was that if each child
process was busy serving a single long-lived request and the server
was sent a graceful restart signal, the server would stop serving
requests. This would happen because each child process would wait to
die until the last thread was done, and the parent wouldn't spawn any
new children until a process died. Now, the parent looks at the fact
that the children are dying gracefully, and starts new children.
Those new children only start enough threads to compliment the number
of threads in the other child process that shares the same spot in
the scoreboard. In this way, we make sure to never go over
MaxClients. [Ryan Bloom]
*) modified mod_negotiation and mod_autoindex to speed up by almost a
factor of two on apr_dir_read()-enhanced platforms, such as Win32
and OS2, by calling ap_sub_request_lookup_dirent() with the results
already provided by apr_dir_read(). [William Rowe]
*) mod_file_cache is now more robust to filtering and serves requests
slightly more efficiently. [Cliff Woolley]
*) Fix problem handling FLUSH bucket in the chunked encoding filter.
Module was calling ap_rwrite() followed by ap_rflush() but the
served content was not being displayed in the browser. Inspection
of the output stream revealed that the first data chunk was
missing the trailing CRLF required by the RFC. [Bill Stoddard]
*) apxs no longer generates ap_send_http_header() in the example handler
*) Fix an ab problem which could cause a divide-by-zero exception
with certain invocations (e.g., ab -k -c 6 -n 100 localhost/).
*) Solve case-insensitive platforms' confusion about negotiated
filenames, allowing files of differnt case to match in choosing
the document to serve. [William Rowe]
*) Fix brokenness when ThreadsPerChild is higher than the built-in
limit. We left ap_threads_per_child at the higher value which
led to segfaults when doing certain scoreboard operations.
[Jeff Trawick]
*) Fix seg faults and/or missing output from mod_include. The
default_handler was using the subrequest pool for files and
MMAPs, even though the associated APR structures typically
live longer than the subrequest. [Greg Ames]
*) Extend mod_setenvif to support specifying regular expressions
on the SetEnvIf (and SetEnvIfNoCase) directive attribute field.
Example: SetEnvIf ^TS* [a-z].* HAVE_TS
will cause HAVE_TS to be set if any of the request headers begins
with "TS" and has a value that begins with any character in the
set [a-z]. [Bill Stoddard]
*) httpd children now re-bind themselves to a random CPU on
multiprocessor systems on AIX via bindprocessor() in 2.0.
[Victor J. Orlikowski]
*) Fix htdigest. It would go into a loop in getline when adding
a second user. [Bill Stoddard]
*) Win32 platforms now fully support mod_userdir options. [Will Rowe]
*) Automatically generate httpd.exp for AIX.
*) Add a new request hook, error_log. This phase allows modules
to act on the error log string _after_ it has been written
to the error log. The goal for this hook is to allow monitoring
modules to send the error string to the monitoring agent.
[Ryan Bloom]
*) Modify mod_echo to make it use filters for input and output.
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*) Extend mod_headers to support conditional driven Header
add, append and set. Use SetEnvIf to set an envar and conditionally
add/append/set headers based on this envar thusly:
SetEnvIf TSMyHeader value HAVE_TSMyHeader
Header add MyHeader "%t %D" env=HAVE_TSMyHeader
If the request contains header "TSMyHeader: value" then header
MyHeader: "t=xxxxxxxxxx D=yyyy" will be sent on the response.
[Bill Stoddard]
*) Extend mod_headers to support using format specifiers on Header
add, append and set header values. Two format specifiers are supported:
%t - reports, in UTC microseconds since the epoch, when the
request was received.
%D - reports the time, in microseconds, between when the request was
received and the response sent.
Examples:
Header add MyHeader "This request served in %D microseconds. %t"
results in a header being added to the response that looks like this:
MyHeader: This request served in D=5438 microseconds. t=991424704447256
[Bill Stoddard]
*) Fix reset_filter(). We need to be careful how we remove filters.
If we set r->output_filters to NULL, we also have to reset the
connection's filters. [John Sterling]
*) Optimise reset_filter() in http_protocol.c. [Greg Stein]
*) Add a check to ap_die() to make sure the filter stack is sane and
contains the correct basic filters when an error occurs. This fixes
a problem where headers are not being sent on error. [John Sterling]
*) New Header directive 'echo' option. "Header echo regex" will
cause any headers received on the request that match regex to be
echoed to (included in) the response headers.
[Bill Stoddard]
*) include/ap_compat.h tested and set APR_COMPAT_H instead of AP_COMPAT_H.
This prevented the inclusion of apr_compat.h. PR #7773
*) Moved util_uri to the apr-util library. This required a bunch of
apr_name changes for the uri utility functions. [Justin Erenkrantz]
*) Move the addition of default AP_HTTP_HTTP_HEADER filters to the
insert_filter phase so that other filters are not bypassed by default.
[Graham Leggett]
*) Reimplement mod_headers as an output filter. mod_headers can now
add custom headers to inbound requests using the RequestHeader directive
and to responses using the same old Header directive. [Graham Leggett]
Changes with Apache 2.0.18
*) Fix command-line processing so that if a bad argument is specified
Apache will exit. [Jeff Trawick]
*) Change the make targets and rules to be consistent in all of the
Apache-owned source trees. [Roy Fielding]
*) Fix processing of the TRACE method. Previously we passed bogus
parms to form_header_field() and it overlaid some vhost structures,
resulting in a segfault in check_hostalias().
[Greg Ames, Jeff Trawick]
*) Win32: Add support for reliable piped logs. If the logging process
goes down, Apache will automatically restart it. This function has
been part of Apache on Unix/Linux/BSD since the early v1.3 releases.
[Bill Stoddard]
*) Do not start piped log processes during the config file
preflight. This change also circumvents a problem on
Windows where the rotatelog processes created during preflight
was not getting cleaned up properly.
[Bill Stoddard]
*) add "Request Phase Participation" info to mod_info
[Doug MacEachern]
*) Make first phase changes to the scoreboard data structures in
preparation for the rewriting of the scoreboard per my posted
design notes. [Paul J. Reder]
*) Fix httpd's definition of LTFLAGS to be consistent with that of apr
and apr-util, allow it to be overridden by the configure command-line
(default="--silent") and introduce LT_LDFLAGS to replace what we were
formerly abusing as LTFLAGS. [Roy Fielding]
*) Clean up the reporting of incorrect closing container tags.
*) Simplify the configure process by moving all libtool stuff to APR
and moving hints.m4 inline. [Roy Fielding]
*) Add the AP_DECLARE()/AP_CORE_DECLARE macros on the return types
of functions used by mod_proxy for export in the DLL