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STATUS
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APACHE 2.1 STATUS: -*-text-*-
Last modified at [$Date$]
The current version of this file can be found at:
http://svn.apache.org/repos/asf/httpd/httpd/trunk/STATUS
Release history:
[NOTE that only Alpha/Beta releases occur in 2.1 development]
2.1.4 : in development
2.1.3 : Released on 2/22/2005 as alpha.
2.1.2 : Released on 12/08/2004 as alpha.
2.1.1 : Released on 11/19/2004 as alpha.
2.1.0 : not released.
Please consult the following STATUS files for information on related projects:
* http://svn.apache.org/repos/asf/apr/apr/trunk/STATUS
* http://svn.apache.org/repos/asf/apr/apr-util/trunk/STATUS
* http://svn.apache.org/repos/asf/httpd/httpd/trunk/docs/STATUS
Contributors looking for a mission:
* Just do an egrep on "TODO" or "XXX" in the source.
* Review the bug database at: http://issues.apache.org/bugzilla/
* Review the "PatchAvailable" bugs in the bug database:
http://issues.apache.org/bugzilla/buglist.cgi?bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&product=Apache+httpd-2.0&keywords=PatchAvailable
After testing, you can append a comment saying "Reviewed and tested".
* Open bugs in the bug database.
CURRENT RELEASE NOTES:
RELEASE SHOWSTOPPERS:
* Handling of non-trailing / config by non-default handler is broken
http://marc.theaimsgroup.com/?l=apache-httpd-dev&m=105451701628081&w=2
jerenkrantz asks: Why should this block a release?
* the edge connection filter cannot be removed
http://marc.theaimsgroup.com/?l=apache-httpd-dev&m=105366252619530&w=2
jerenkrantz asks: Why should this block a release?
stas replies: because it requires a rewrite of the filters stack
implementation (you have suggested that) and once 2.2 is
released you can't do that anymore.
CURRENT VOTES:
* httpd-std.conf and friends
a) httpd-std.conf should be tailored by install (from src or
binbuild) even if user has existing httpd.conf
+1: trawick, slive, gregames, ianh, Ken, wrowe, jwoolley, jim, nd,
erikabele
wrowe - prefer httpd.default.conf to avoid ambiguity with cvs
b) tailored httpd-std.conf should be copied by install to
sysconfdir/examples
-0: striker
c) tailored httpd-std.conf should be installed to
sysconfdir/examples or manualdir/exampleconf/
+1: slive, trawick, Ken, nd (prefer the latter), erikabele
d) Installing a set of default config files when upgrading a server
doesn't make ANY sense at all.
+1: ianh - medium/big sites don't use 'standard config' anyway, as it
usually needs major customizations
-1: Ken, wrowe, jwoolley, jim, nd, erikabele
wrowe - diff is wonderful when comparing old/new default configs,
even for customized sites that ianh mentions
jim - ... assuming that the default configs have been updated
with the required inline docs to explain the
changes
* If the parent process dies, should the remaining child processes
"gracefully" self-terminate. Or maybe we should make it a runtime
option, or have a concept of 2 parent processes (one being a
"hot spare").
See: Message-ID: <3C58232C.FE91F19F@Golux.Com>
Self-destruct: Ken, Martin, Lars
Not self-destruct: BrianP, Ian, Cliff, BillS
Make it runtime configurable: Aaron, jim, Justin, wrowe, rederpj, nd
/* The below was a concept on *how* to handle the problem */
Have 2 parents: +1: jim
-1: Justin, wrowe, rederpj, nd
+0: Lars, Martin (while standing by, could it do
something useful?)
* Make the worker MPM the default MPM for threaded Unix boxes.
+1: Justin, Ian, Cliff, BillS, striker, wrowe, nd
+0: BrianP, Aaron (mutex contention is looking better with the
latest code, let's continue tuning and testing), rederpj, jim
-0: Lars
pquerna: Do we want to change this for 2.2?
RELEASE NON-SHOWSTOPPERS BUT WOULD BE REAL NICE TO WRAP THESE UP:
* Patches submitted to the bug database:
http://issues.apache.org/bugzilla/buglist.cgi?bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&product=Apache+httpd-2.0&keywords=PatchAvailable
* The Event MPM does not work on Solaris 10. Solaris 10 does support the
Threadsafe Pollsets required by the Event MPM, but it does not support
multiple threads calling accept() at the same time. The current
structure of the Event MPM makes adding accept() locking difficult.
* Filter stacks and subrequests, redirects and fast redirects.
There's at least one PR that suffers from the current unclean behaviour
(which lets the server send garbage): PR 17629
nd says: Every subrequest should get its own filter stack with the
subreq_core filter as bottom-most. That filter does two things:
- swallow EOS buckets
- redirect the data stream to the upper request's (rr->main)
filter chain directly after the subrequest's starting
point.
Once we have a clean solution, we can try to optimize
it, so that the server won't be slow down too much.
* RFC 2616 violations.
Closed PRs: 15857.
Open PRs: 15852, 15859, 15861, 15864, 15865, 15866, 15868, 15869,
15870, 16120, 16125, 16126, 16133, 16135, 16136, 16137,
16138, 16139, 16140, 16142, 16518, 16520, 16521,
jerenkrantz says: need to decide how many we need to backport and/or
if these rise to showstopper status.
wrowe suggests: it would be nice to see "MUST" v.s. "SHOULD" v.s. "MAY"
out of this list, without reviewing them individually.
* There is a bug in how we sort some hooks, at least the pre-config
hook. The first time we call the hooks, they are in the correct
order, but the second time, we don't sort them correctly. Currently,
the modules/http/config.m4 file has been renamed to
modules/http/config2.m4 to work around this problem, it should moved
back when this is fixed.
OtherBill offers that this is a SERIOUS problem. We do not sort
correctly by the ordering arguments passed to the register hook
functions. This was proven when I reordered the open_logs hook
to attempt to open the error logs prior to the access logs. Possibly
the entire sorting code needs to be refactored.
* pipes deadlock on all platforms with limited pipe buffers (e.g. both
Linux and Win32, as opposed to only Win32 on 1.3). The right solution
is either GStein's proposal for a "CGI Brigade", or OtherBill's proposal
for "Poll Buckets" for "Polling Filter Chains". Or maybe both :-)
* All handlers should always send content down even if r->header_only
is set. If not, it means that the HEAD requests don't generate the
same headers as a GET which is wrong.
* exec cmd and suexec arg-passing enhancements
Status: Patches proposed
Message-ID: <20020526041748.A29148@prodigy.Redbrick.DCU.IE>
(see the "proc.patch" and "suexec-shell.patch" links in this message)
* The 2.0.36 worker MPM graceless shutdown changes work but are
a bit clunky on some platforms; eg, on Linux, the loop to
join each worker thread seems to hang, and the parent ends up
killing off the child with SIGKILL. But at least it shuts down.
* --enable-mods-shared="foo1 foo2" is busted on Darwin. Pier
posted a patch (Message-ID: <B8DBBE8D.575A%pier@betaversion.org>).
* We do not properly substitute the prefix-variables in the configuration
scripts or generated-configs. (i.e. if sysconfdir is etc,
httpd-std.conf points to conf.)
* If any request gets through ap_process_request_internal() and is
scheduled to be served by the core handler, without a flag that this
r->filename was tested by dir/file_walk, we need to 500 at the very
end of the ap_process_request_internal() processing so sub_req-esters
know this request cannot be run. This provides authors of older
modules better compatibility, while still improving the security and
robustness of 2.0.
Status: still need to decide where this goes, OtherBill comments...
Message-ID: <065701c14526$495203b0$96c0b0d0@roweclan.net>
[Deleted comments regarding the ap_run_handler phase, as irrelevant
as BillS points out that "common case will be caught in
default_handler already (with the r->finfo.filetype == 0 check)"
and the issue is detecting this -before- we try to run the req.]
gregames says: can this happen somehow without a broken module
being involved? If not, why waste cycles trying to defend against
potential broken modules? It seems futile.
wrowe counters: no, it shouldn't happen unless the module is broken.
But the right answer is to fail the request up-front in dir/file
walk if the path was entirely invalid; and we can't do that either
UNTIL 2.1 or we break modules that haven't hooked map_to_storage.
* With AP_MODE_EXHAUSTIVE in the core, it is finally clear to me
how the Perchild MPM should be re-written. It hasn't worked
correctly since filters were added because it wasn't possible to
get the content that had already been written and the socket at
the same time. This mode lets us do that, so the MPM can be
fixed.
* Can a static httpd be built reliably?
Message-ID: <20020207142751.T31582@clove.org>
* Usage of APR_BRIGADE_NORMALIZE in core_input_filter should be
removed if possible.
Message-ID: <Pine.LNX.4.33.0201202232430.318-100000@deepthought.cs.virginia.edu>
Jeff wonders if we still care about this. It is no longer an
API issue but simply an extra trip through the brigade.
* Get perchild to work on platforms other than Linux. This
will require a portable mechanism to pass data and file/socket
descriptors between vhost child groups. An API was proposed
on dev@apr:
Message-ID: <20020111115006.K1529@clove.org>
* Try to get libtool inter-library dependency code working on AIX.
Message-ID: <cm3n10lx555.fsf@rdu163-40-092.nc.rr.com>
Justin says: If we get it working on AIX, we can enable this
on all platforms and clean up our build system
somewhat.
Jeff says: I thought I tested a patch for you sometime in
January that you were going to commit within a few
days.
* Handling of %2f in URIs. Currently both 1.3 and 2.0
completely disallow %2f in the request URI path (see
ap_unescape_url() in util.c). It's permitted and passed
through in the query string, however. Roy says the
original reason for disallowing it, from five years ago,
was to protect CGI scripts that applied PATH_INFO to
a filesystem location and which might be tricked by
..%2f..%2f(...). We *should* allow path-info of the
form 'http://foo.com/index.cgi/path/to/path%2finfo'.
Since we've revamped a lot of our processing of path
segments, it would be nice to allow this, or at least
allow it conditionally with a directive.
OtherBill adds that %2f as the SECOND character of a multibyte
sequence causes the request to fail! This happens notably in
the ja-jis encoding.
* FreeBSD, threads, and worker MPM. All seems to work fine
if you only have one worker process with many threads. Add
a second worker process and the accept lock seems to be
lost. This might be an APR issue with how it deals with
the child_init hook (i.e. the fcntl lock needs to be resynced).
More examination and analysis is required.
Status: Works with FreeBSD 5.3. Does not work in previous versions.
This has also been reported on Cygwin.
* There is increasing demand from module writers for an API
that will allow them to control the server à la apachectl.
Reasons include sole-function servers that need to die if
an external dependency (e.g., a database) fails, et cetera.
Perhaps something in the (ever more abused) scoreboard?
On the other hand, we already have a pipe that goes between parent
and child for graceful shutdown events, along with an API that
can be used to send a message down that pipe. In threaded MPMs,
it is easy enough to make that one pipe be used for graceful
and graceless events, and it is also easy to open that pipe
to both parent and child for writing. Then we just need to
figure out how to do graceless on non-threaded MPMs.
* Allow the DocumentRoot directive within <Location > scopes? This
allows the beloved (crusty) Alias /foo/ /somepath/foo/ followed
by a <Directory /somepath/foo> to become simply
<Location /foo/> DocumentRoot /somefile/foo (IMHO a bit more legible
and in-your-face.) DocumentRoot unset would be accepted [and would
not permit content to be served, only virtual resources such as
server-info or server-status.
This proposed change would _not_ depricate Alias.
striker: See the thread starting with Message-ID:
JLEGKKNELMHCJPNMOKHOGEEJFBAA.striker@apache.org.
* Win32: Rotatelogs sometimes is not terminated when Apache
goes down hard. FirstBill was looking at possibly tracking the
child's-child processes in the parent process.
stoddard: Shared scoreboard might offer a good way for the parent
to keep track of 'other child' processes and whack them if the child
goes down.
Other thoughts on walking the process chain using the NT kernel
have also been proposed on APR.
* Eliminate unnecessary creation of pipes in mod_cgid
* Combine log_child and piped_log_spawn. Clean up http_log.c.
Common logging API.
* Platforms that do not support fork (primarily Win32 and AS/400)
Architect start-up code that avoids initializing all the modules
in the parent process on platforms that do not support fork.
* There are still a number of places in the code where we are
losing error status (i.e. throwing away the error returned by a
system call and replacing it with a generic error code)
* Mass vhosting version of suEXEC.
* All DBMs suffer from confusion in support/dbmmanage (perl script) since
the dbmmanage employs the first-matched dbm format. This is not
necessarily the library that Apache was built with. Aught to
rewrite dbmmanage upon installation to bin/ with the proper library
for predictable mod_auth_dbm administration.
Questions; htdbm exists, time to kill dbmmanage, or does it remain
useful as a perl dbm management example? If we keep it,
do we address the issue above?
* Integrate mod_dav.
Some additional items remaining:
- case_preserved_filename stuff
(use the new canonical name stuff?)
- find a new home for ap_text(_header)
- is it possible to remove the DAV: namespace stuff from util_xml?
* ap_core_translate() and its use by mod_mmap_static and mod_file_cache
are a bit wonky. The function should probably be exposed as a utility
function (such as ap_translate_url2fs() or ap_validate_fs_url() or
something). Another approach would be a new hook phase after
"translate" which would allow the module to munge what the
translation has decided to do.
Status: Greg +1 (volunteers)
* Explore use of a post-config hook for the code in http_main.c which
calls ap_fixup_virutal_hosts(), ap_fini_vhost_config(), and
ap_sort_hooks() [to reduce the logic in main()]
* read the config tree just once, and process N times (as necessary)
* (possibly) use UUIDs in mod_unique_id and/or mod_usertrack
* (possibly) port the bug fix for PR 6942 (segv when LoadModule is put
into a VirtualHost container) to 2.0.
* shift stuff to mod_core.h
* callers of ap_run_create_request() should check the return value
for failure (Doug volunteers)
* Win32: Get Apache working on Windows 95/98. The following work
(at least) needs to be done:
- Document warning that OSR2 is required (for Crypt functions, in
rand.c, at least.) This could be resolved with an SSL library, or
randomization in APR itself.
- Bring the Win9xConHook.dll from 1.3 into 2.0 (no sense till it
actually works) and add in a splash of Win9x service code.
* Fix the worker MPM to use POD to kill child processes instead
of ap_os_killpg, regardless of how they should die.
* Scoreboard structures could be changed in the future such that
proper alignment is not maintained, leading to segfaults on
some systems. Cliff posted a patch to deal with this issue but
later recanted. See this message to dev@apr.apache.org:
Message-ID: <Pine.LNX.4.44.0203011354090.16457-200000@deepthought
.cs.virginia.edu>
* When sufficiently tested, the AllowEncodedSlashes/%2f patch
needs to be backported to 2.0 and 1.3.
* APXS either needs to be fixed completely for use when apr is out of tree,
or it should drop query mode altogether, and we just grow an
httpd-config or similar arrangement.
To quote a discussion in STATUS earlier:
thommay: this doesn't fix all the problems with apxs and out of
tree apr/apr-util, but it's a good start. There's still the
query cases; but I'm beginning to think that in these cases
the app should be querying ap{r,u}-config directly
gstein: agreed. apxs should deprecate the -q flag
TODO ISSUES REMAINING IN MOD_SSL:
* In order to use a DSO version of mod_ssl we have to link with
-lssl and -lcrypto. A workaround is in place right now where the
entire EXTRA_LIBS macro is being appended to the objects list, but
this is a hack. We should either revamp the APACHE_CHECK_SSL_TOOLKIT
autoconf function or come up with some other autoconf checks to
search for libssl and libcrypto and properly add them to mod_ssl's
link flags.
* SSL renegotiations in combination with POST request
* Port or dispose all code inside #if 0...#endif blocks that remain
from the porting effort.
* Do we need SSL_set_read_ahead()?
* the ssl_expr api is NOT THREAD SAFE. race conditions exist:
-in ssl_expr_comp() if SSLRequire is used in .htaccess
(ssl_expr_info is global)
-is ssl_expr_eval() if there is an error
(ssl_expr_error is global)
* SSLRequire directive (parsing of) leaks memory
* Diffie-Hellman-Parameters for temporary keys are hardcoded in
ssl_engine_dh.c, while the comment in ssl_engine_kernel.c says:
"it is suggested that keys be changed daily or every 500
transactions, and more often if possible."
* ssl_var_lookup could be rewritten to be MUCH faster
* CRL callback should be pluggable
* session cache store should be pluggable
* init functions should return status code rather than ssl_die()
* ssl_engine_pphrase.c needs to be reworked so it is generic enough
to also decrypt proxy keys
* the shmcb code should just align its memory segment rather than
jumping through all the "safe" memcpy and memset hoops
WISH LIST
* mod_proxy: Ability to run SSL over proxy gateway connections,
encrypting (or reencrypting) at the proxy.
* mod_cache: Handle ESI tags.
* mod_cache: Resolve issue of how to cache page fragements (or perhaps
-if- we want to cache page fragements). Today, mod_cache/mod_mem_cache
will cache #include 'virtual' requests (but not #include 'file'
requests). This was accomplished by making CACHE_IN a
CONTENT_SET-1 filter to force it to run before the SUBREQ_CORE
filter. But now responses cannot be cached that include the
effects of having been run through CONTENT_SET filters
(mod_deflate, mod_expires, etc). We could rerun all the
CONTENT_SET filters on the cached response, but this will not
work in all cases. For example, mod_expires relies on installing
the EXPIRATION filter during fixups. Contents served out of
mod_cache (out of the quick_handler) bypass -all- the request
line server hooks (Ryan really hated this. It is great for
performance, but bad because of the complications listed above).
mod_cache/mod_mem_cache/mod_disk_cache:
* mod_mem_cache: Consider adding a RevalidateTimeout directive to
specify time at which local cached content is to be revalidated
(ie, underlying file stat'ed to see if it has changed).
* mod_cache: CacheEnable/CacheDisable should accept regular expressions.
jerenkrantz says: Too slow. Get regexs away from speedy caches by
default. Introduce a new CacheEnableRegex if you want.
* mod_mem_cache/mod_disk_cache: Need to be able to query cache
status (num of entries, cache object properties, etc.).
mod_status could be extended to query optional hooks defined
by modules for the purpose of reporting module status.
mod_cache (et. al.) could define optional hooks that are called
to collect status. Status should be queryable by
HTTP or SNMP?
jerenkrantz says: Yawn. Who cares.
EXPERIMENTAL MODULES:
Experimental modules should eventually be be promoted to fully supported
status or removed from the repository entirely (ie, the
'experiment' failed). This section tracks what needs to happen to
get the modules promoted to fully supported status.
Other bugs that need fixing:
* MaxRequestsPerChild measures connections, not requests.
Until someone has a better way, we'll probably just rename it
"MaxConnectionsPerChild".
* Regex containers don't work in an intutive way
Status: No one has come up with an efficient way to fix this
behavior. Dean has suggested getting rid of regex containers
completely.
OtherBill suggests: We at least seem to agree on eliminating
the <Container ~ foo> forms, and using only
<ContainerMatch foo> semantics.
* orig_ct in the byterange/multipart handling may not be
needed. Apache 1.3 just never stashed "multipart" into
r->content_type. We should probably follow suit since the
byterange stuff doesn't want the rest of the code to see the
multipart content-type; the other code should still think it is
dealing with the <orig_ct> stuff.
Status: Greg volunteers to investigate (esp. since he was most
likely the one to break it :-)
Binaries (probably not till beta):
Platform Avail. Volunteer
------------------------------------------------------------------
AIX 4.3.3 no Bill Stoddard
Mandrake 8.1 no open
FreeBSD 4.1 no open
hppa2.0w-hp-hpux11.00 no Cliff Woolley
i386-pc-solaris2.8 no Aaron Bannert
i386-unknown-freebsd4.5 no
i386-unknown-freebsd4.6 no Cliff Woolley
i686-pc-linux-gnu-slackware81 no Cliff Woolley
i686-pc-linux-gnu-rh70 no Aaron Bannert
i686-pc-linux-gnu-rh73 no Cliff Woolley
ia64-hp-hpux11.20 no
powerpc-apple-darwin5.5 no Aaron Bannert
powerpc-unknown-linux-gnu no Graham Leggett
s390-ibm-linux no Greg Ames
sparc-sun-solaris2.8 no Jim Jagielski
NetWare no Brad Nicholes
OS/2 no Brian Havard
OS/390 no Greg Ames
Win32-x86 no William Rowe