Strange mod_perl2/Apache2 behavior -- I think
Here's a little snippet from a sample script:
package MyApache::MyPackage;
use strict;
use warnings;
use Apache::RequestRec ();
use Apache::RequestIO ();
use Apache::DBI;
use APR::Table;
use Apache::Const qw(OK REDIRECT DECLINED);
use Apache::RequestUtil ();
sub handler {
my $r = shift;
my $current_uri = $r-uri;
my $content_type = $r-content_type;
my @fields = split(/\//, $current_uri);
# Let's see if the file exists first
return Apache::DECLINED unless !-e $r-filename;
# other stuff happens past this point but this is enough to document the
problem.
}
Here's my the relevant settings in my config file:
Location /b
PerlSendHeader On
SetHandler perl-script
PerlHandler MyApache::MyPackage
/Location
OK, so this is set up as a PerlResponseHandler on a virtual server. When the
handler is invoked, it loads the page (a php page) but doesn't parse it in
PHP before displaying to the browser. I just get back the raw php code.
Actually, this is somewhat misleading. On Opera it displays the code. In IE
it asks me whether or not I want to download it or open it. When I remove
the handler config in the conf files Apache handles it just as it should (it
parses the php correctly) but with the handler in there when I go to
http://localhost/b/b.php I get.
?php
print Hello World;
?
instead of the actual printing out of Hello World. Here's the results
from a telnet session:
GET /b/b.php HTTP/1.1
Host: localhost
HTTP/1.1 200 OK
Date: Wed, 20 Aug 2003 19:54:02 GMT
Server: Apache/2.0.47 (Unix) mod_perl/1.99_09 Perl/v5.8.0 mod_ssl/2.0.47
OpenSSL/0.9.7a DAV/2 PHP/4.3.2
Last-Modified: Wed, 20 Aug 2003 10:45:31 GMT
ETag: 21c229-3f-ef2ea8c0
Accept-Ranges: bytes
Content-Length: 63
Content-Type: application/x-httpd-php
?php
print Hello World;
?
Connection closed by foreign host.
When I've telneted into the the machine and called the file directly it
seems that the proper content type is being set but in the browser (as
mentioned above) IE reports the content-type as blank (there's a null value
in the popup box for content-type when it asks me to download or open the
file). No errors appear in the log files.
Now, I know it's executing because it actually processes the code below that
line which ends in a redirect. But if I try to exit the handler because
it's not the correct type of request it seems to mess up the proper handling
of php and html files. Image files seem to appear correctly but that may be
the browser compensating or reading the encoding type.
Of course, if anybody has an easier suggestion on what I'm trying to do:
I want the document root directory to be handled by the PerlResponseHandler
(i.e. Location /). For specific types of requests I would like the above
handler to look up some information in the database and return the info
dynamically. The only time I don't want that to happen is if the file
already exists OR it's pointing to a directory that exists that has a
default document type in it (ie index.html or index.php). Everything else I
want the handler to do something special with.
So, for instance, if I have the following files:
/index.html
/somefile.html
/somedir/index.html
/somedir/somefile2.html
Any request to:
http://localhost/
http://localhost/index.html
http://localhost/somefile.html
http://localhost/somedir/
http://localhost/somedir/index.html
http://localhost/somedir/somefile2.html
Should all just be handled normally. But if I get a request for:
http://localhost/abc/def/
or
http://localhost/somedir/abcdef
I want the above perl handler to parse the uri and do
something different (directories /abc/def and /abcdef/ would not
actually exist).
TIA for any help on this.
Bill
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Re: Strange mod_perl2/Apache2 behavior -- I think
Hi Stas, Thanks for the help. Changing it to the PerlTransHandler did the trick. The weird part about it (to me) is that I was basically extending some code I had written about 2 years ago for a client and just changing the functionality around some. The meat of the program was pretty much the same except my datastructures are a little different and instead of delegating errors to my own custom code I just wanted them to default to the what was configured in the server settings. Obviously that was on mp1 and Apache 1.x but it worked perfectly under that and the only mods I had made to the mp2 version was the headers_out stuff and some minor compatibility tweaks. Oh well. I guess I'll be a little more careful reading the mod_perl docs this time around :-) Thanks, Bill DISCLAIMER: The views expressed by the author of this email may or may not be his/her views, the views of any company s/he represents, or the views of any persons living, dead, or undead.This email message, including any attachments, is for the sole use of the intended recipient(s). If you have received this e-mail in error do not open it. Any errors in facts, spelling, or tact are transmission errors caused by your email client. http://www.windowsix.com From: Stas Bekman [EMAIL PROTECTED] To: [EMAIL PROTECTED] CC: [EMAIL PROTECTED] Subject: Re: Strange mod_perl2/Apache2 behavior -- I think Date: Wed, 20 Aug 2003 14:21:54 -0700 [...] Location /b PerlSendHeader On SetHandler perl-script PerlHandler MyApache::MyPackage /Location [...] I want the document root directory to be handled by the PerlResponseHandler (i.e. Location /). For specific types of requests I would like the above handler to look up some information in the database and return the info dynamically. The only time I don't want that to happen is if the file already exists OR it's pointing to a directory that exists that has a default document type in it (ie index.html or index.php). Everything else I want the handler to do something special with. You probably want to write a PerlTransHandler, not a response handler if you are after dispatching. There are plenty examples in the books, perl.apache.org. If you meant something else, please give us some more meat, your example lacks the logic that you may have the problem with. __ Stas BekmanJAm_pH -- Just Another mod_perl Hacker http://stason.org/ mod_perl Guide --- http://perl.apache.org mailto:[EMAIL PROTECTED] http://use.perl.org http://apacheweek.com http://modperlbook.org http://apache.org http://ticketmaster.com -- Reporting bugs: http://perl.apache.org/bugs/ Mail list info: http://perl.apache.org/maillist/modperl.html _ bGet MSN 8/b and enjoy automatic e-mail virus protection. http://join.msn.com/?page=features/virus -- Reporting bugs: http://perl.apache.org/bugs/ Mail list info: http://perl.apache.org/maillist/modperl.html
Re: [mp2 Patch] BUG with mod_deflate and $|=1 (20014:Error string not specified)
Try this patch: [...] Feel free to submit this bug report and the fix to httpd-dev. Please let me know if you do that, so I won't duplicate it. But I'd prefer that you do it so you can make sure that it gets fixed in the next release, since you need it working. I've just verified that your patch fixes my problem. I've never submitted a but report and fix to httpd-dev, but I'm willing to do it. How do I do it? -bill
Apache:DBI in /perl-status?
I must be missing something obvious, but I can't get the friendly
Apache::DBI status item to show up in /perl-status like I read about.
I can see the module loaded at:
/perl-status/?Apache::DBI
and other modules, e.g. HTML::Mason, have installed their status pages,
so I'm assuming Apache::Status is OK.
I have in my perl.conf, at the top now:
-
PerlModule Apache::Status
PerlModule Apache::DBI
PerlRequire conf/startup.pl
-
then later:
-
Location /perl-status
SetHandler perl-script
PerlHandler Apache::Status
/Location
-
and in my startup.pl:
-
BEGIN {
use Apache;
}
use Apache::Status;
use Apache::DBI;
-
This is on: Embedded Perl version v5.8.1 for Apache/1.3.28 (Unix)
mod_perl/1.28
From what I've read on the list archives and the Apache::DBI man page,
this setup is about right.
I've run Apache::DBI in debug mode, and it's certainly doing its job.
Does anybody see what I did wrong?
Thanks,
-Bill
Re: [mp2 Patch] BUG with mod_deflate and $|=1 (20014:Error string not specified)
Please report to the list the bug id so we can document this issue for those who have the same problem with older httpds. Thanks. OK, I've posted it. http://nagoya.apache.org/bugzilla/show_bug.cgi?id=22259 Thanks for the fix! -bill
Re: [Fwd: Call for Participation for ApacheCon US 2003]
At 04:14 AM 7/22/2003, Stas Bekman wrote: If you would like to be a speaker at the ApacheCon US 2003 event, please go to the ApacheCon Web site, log in, and choose the 'Submit a CFP' option from the list there: I went through the process of creating an account only to find that the Submit a CFP option isn't there. Until they get that fixed, you can select Contact Us from the bottom menu, then under the cfp@ address there's a link to the online submission form. --Bill --- Bill Weinman http://bw.org/ Music http://music.bw.org/ Whois Client http://whois.bw.org/ Music Database http://www.webmusicdb.com/ --+
Re: Apache 1.3.27 configure error with mod_perl 1.28, perl 5.8.0, gcc 3.3 on Solaris 2.8
At 03:50 PM 7/22/2003, Chris Fabri wrote: helpers/dummy.c -lsocket -lnsl -lpthread -W1,-E -L/usr/local/lib/gcc-lib/sparc- ..^^^ I think your problem is with the stray comma in the command line there ... I think if you check all your configurations and make files and get that fixed, it will work (at least get beyond that error). --Bill --- Bill Weinman http://bw.org/ Music http://music.bw.org/ Whois Client http://whois.bw.org/ Music Database http://www.webmusicdb.com/ --+
Re: Apache 1.3.27 configure error with mod_perl 1.28, perl 5.8.0, gcc 3.3 on Solaris 2.8
At 04:45 PM 7/22/2003, Chris Fabri wrote: I'm not even getting as far as the make when I get the error.If I build mod_perl separately, and remove all references to these flags from the makefiles, and the run apache's config, I still get this error during configuration. Where do you find those flags in the makefiles? I don't see them anywhere in my copy. --Bill --- Bill Weinman http://bw.org/ Music http://music.bw.org/ Whois Client http://whois.bw.org/ Music Database http://www.webmusicdb.com/ --+
Re: [mp2 Patch] BUG with mod_deflate and $|=1 (20014:Error string not specified)
I can measure it myself if you can provide me with URLs to your resources and identify them in terms of which one is mod_CGI and which is mod_perl. This is the mod_cgi one that works fine, no errors: http://shevek.kenyonhill.com/cgi/test.pl This is the mod_perl one (same script) that generates the 20014:Error in the error_log. Also, the page doesn't display correctly (it seems to erase itself): http://shevek.kenyonhill.com/perl/test.pl This is the contents of test.pl: --- #!/usr/bin/perl $|=1; print Content-Type: text/html\n\n; print hello worldP; # This line causes the error print ; --- Let me know if you need anything more.
Re: [mp2 Patch] BUG with mod_deflate and $|=1 (20014:Error string not specified)
We can see that mod_cgi bufferizes the output and sends it with Content-Length HTTP header (to mod_deflate). Indeed mod_perl generates chunked response. Finally we have the same result. I don't see any problem at this moment. Well, the problem is that I get this error in my error_log: [Mon Jul 21 14:18:55 2003] [error] 4297: ModPerl::RegistryBB: 20014:Error string not specified yet at /var/www/perl/test.pl line 6. Also, more important, the script seems to be terminating and/or any output following the 'print ' is not sent to the client as far as I can tell. You would probably wish to append your script with additional output after the empty string? Something like: #!/usr/bin/perl $|=1; print Content-Type: text/html\n\n; print hello worldP; # This line causes the error (?) print ; print hello againP; --- When I do this, the mod_perl variant of the script fails to print hello againP. mod_cgi prints everything just fine and gets no errors. I changed my test script to print a bunch of `date`'s http://shevek.kenyonhill.com/cgi/test.pl http://shevek.kenyonhill.com/perl/test.pl It may cause a problem for chunked output if mod_deflate does not care to keep internal buffer and check its size when flushing... I may not be understanding the output you sent or what you're saying, but I still don't follow why this would be a mod_deflate bug if mod_cgi with the same script has no problem.
Re: [mp2 Patch] BUG with mod_deflate and $|=1 (20014:Error string not specified)
At 04:24 AM 7/15/2003, Stas Bekman wrote: Philippe M. Chiasson wrote: On Thu, 2003-07-03 at 01:24, Bill Marrs wrote: This fixed the bug for me. Great! Will commit it in the near future. (Can't seem to access the cvs server right now, crappy internet cafe) -1, this is a wrong solution. print ; should flush just like it did in mod_perl 1.0 if $| == 1; Consider this script: print Content-type: text/plain\n\n; local $| = 0; print start\n\n; local $| = 1; print ; sleep 5; local $| = 0; print end\n; print , must immediately flush the buffered data, since $| has changed from 0 to 1. This may be naive, but might it not flush the output buffer at the 4th line (local $| = 1;)? ...or does the flush only happen when print is called. Having to call print seems cumbersome to do a flush, but maybe that's just the way Perl works? One thing that could help is if someone could take the time to write a test for this bug. Unfortunately I don't seem to be able to reproduce the problem, so I can't debug the problem. It could be a bug on the mod_deflate's behalf as well. Philippe, were you able to reproduce the problem with Bill's setup? I was writing a test, but couldn't get it to fail... may be because i was using 2.0.47. Bill, do you have the problem with the latest apache version? Did you see my note in the original post about this working fine under mod_cgi, but causing the 20014:Error only under mod_perl? This seemed to point the finger squarely at mod_perl. I could upgrade to 2.0.47, but it seems unlikely that it would fix this. Are you sure you're running a mod_perl without Philippe's fix (in Apache__RequestIO.h), I assumed he eventually checked it in. Also Bill, why do you have this setup: Location /perl AddOutputFilterByType DEFLATE text/* SetOutputFilter DEFLATE /Location why adding it twice? You need only the latter inside Location, or alternatively only the former outside Location if you want it to be set globally: http://httpd.apache.org/docs-2.0/mod/core.html#addoutputfilterbytype Ah, I misunderstood the mod_deflate docs. I think at the time, it didn't seem to work with just one of them in-place, so I added the other. *SHRUG* I can't say I'm a pro at Apache config files, I just tinker until it works. I assume this is irrelevant to the bug, though. -bill
Re: [mp2 Patch] BUG with mod_deflate and $|=1 (20014:Error string not specified)
I could upgrade to 2.0.47, but it seems unlikely that it would fix
this. Are you sure you're running a mod_perl without Philippe's fix (in
Apache__RequestIO.h), I assumed he eventually checked it in.
No, Philippe hasn't committed it, neither I have used it. If you can test
with 2.9.47 that will help. Otherwise I'll later try with .46 as well.
I just upgraded to Apache 2.0.47 and the latest CVS of mp2 and I'm
reproducing it, same as I originally reported.
I tried a few variations to see if I could find other factors, but didn't
have much luck. The server I'm testing on is live (runs a small site), so
I'm somewhat limited in what I can do. But, I tried removing mod_rewrite,
and mod_ssl from my server config and I still got the error in my tests.
I also tried varying the mod_deflate config (as you pointed out it was
redundant/wrong)...
Also Bill, why do you have this setup:
Location /perl
AddOutputFilterByType DEFLATE text/*
SetOutputFilter DEFLATE
/Location
why adding it twice? You need only the latter inside Location, or
alternatively only the former outside Location if you want it to be
set globally:
http://httpd.apache.org/docs-2.0/mod/core.html#addoutputfilterbytype
Ah, I misunderstood the mod_deflate docs. I think at the time, it didn't
seem to work with just one of them in-place, so I added the
other. *SHRUG* I can't say I'm a pro at Apache config files, I just
tinker until it works. I assume this is irrelevant to the bug, though.
I'm not sure if your config doesn't insert the filter twice. Need to check
whether SetOutputFilter overrides AddOutputFilterByType as well.
In my config, I have a deflate log:
DeflateFilterNote Input instream
DeflateFilterNote Output outstream
DeflateFilterNote Ratio ratio
LogFormat '%r %{outstream}n/%{instream}n (%{ratio}n%%) %{User-agent}i'
deflate
CustomLog /var/log/httpd/deflate_log deflate
I was using this to verify that deflate was active or not. What I found
was that using AddOutputFilterByType DEFLATE text/* doesn't seem to
activate deflate, no matter where I put it (in a Location or at the
top-level of the config). My deflate log shows that no compression is
occurring. SetOutputFilter DEFLATE does activate deflate globally (for
all locations), no matter where I put it. I'm afraid I don't find the
mod_deflate docs very clear on placement.
When you were trying to reproduce, I don't know if you used my (redundant)
config before, but if you only used AddOutputFilterByType DEFLATE text/*,
and not SetOutputFilter DEFLATE, that might explain why you were not able
to reproduce this, I don't think that activates deflate (at least that's
what my deflate_log shows for me).
Otherwise, if you're still not reproducing this, I would assume there's
some difference in the way we are building apache or our apache config
files or perl?
Here's my Apache Configure line:
./configure --enable-modules=all --enable-mods-shared=all --enable-deflate
--with-mpm=prefork --enable-rewrite --enable-ssl
Here are the Modules I load:
LoadModule cgi_module modules/mod_cgi.so
LoadModule access_module modules/mod_access.so
LoadModule log_config_module modules/mod_log_config.so
LoadModule env_module modules/mod_env.so
LoadModule expires_module modules/mod_expires.so
LoadModule headers_module modules/mod_headers.so
LoadModule setenvif_module modules/mod_setenvif.so
LoadModule mime_module modules/mod_mime.so
LoadModule autoindex_module modules/mod_autoindex.so
LoadModule asis_module modules/mod_asis.so
LoadModule info_module modules/mod_info.so
LoadModule vhost_alias_module modules/mod_vhost_alias.so
LoadModule dir_module modules/mod_dir.so
LoadModule alias_module modules/mod_alias.so
LoadModule rewrite_module modules/mod_rewrite.so
LoadModule perl_module modules/mod_perl.so
LoadModule ssl_module modules/mod_ssl.so
mod_cgi, mod_ssl and mod_rewrite seem to be innocent (when I removed them,
it still failed), but maybe you're using a module that I'm not and this is
causing your config to work better? I think that I'm loading less modules
than what is typical, I removed as many as I could to reduce memory usage a
while ago.
*SHRUG*
One thing that may be relevant is tracking down where the 20014:Error is
coming from. Web searching seems to associate it with Berkeley DB code,
which seems odd to me, is Apache using Berkeley DB code somewhere (via a
filter?)?
This isn't a very important issue for me. I have a decent workaround
(print instead of ), plus I'm not really able to use mod_deflate that
much anyway because it puts too much load on my server (mod_gzip with
Apache 1.3 worked better for me).
Thanks
-bill
Re: Memoize.pm and mod_perl
I don't know anything about Memoize, but perhap db-level caching would work for you? If you user MySQL, Mysql 4.0.1 and beyond has Query Caching capabilities built into it. http://www.mysql.com/documentation/mysql/bychapter/manual_Reference.html#Query_Cache -=bill
[mp2] BUG with mod_deflate and $|=1 (20014:Error string not specified)
When I use Apache 2.0.46, mod_deflate with mod_perl-1.99_09 (or the latest mod_perl-2.0 CVS), perl buffering is off ($|=1), and my perl script prints nothing (e.g. 'print ;'), I get the following error: [Wed Jul 02 10:10:00 2003] [error] 19513: ModPerl::RegistryBB: 20014:Error string not specified yet at /var/www/perl/test.pl line 6. If I switch to running the script under mod_cgi or if I remove the $|=1; line, I do not get an error. Here is my script: #!/usr/bin/perl $|=1; print Content-Type: text/html\n\n; print hello worldP; # This line causes the error print ; httpd.conf snipit: Alias /perl/ /var/www/perl/ Location /perl AddOutputFilterByType DEFLATE text/* SetOutputFilter DEFLATE AllowOverride None SetHandler perl-script PerlHandlerModPerl::RegistryBB PerlSendHeader On Options+ExecCGI /Location I've worked-around this problem by changing my print to print . It's not a major issue for me, I'm just letting you know. Let me know if you need any more info. -bill
Re: [mp2 Patch] BUG with mod_deflate and $|=1 (20014:Error string not specified)
This fixed the bug for me.
At 10:48 AM 7/2/2003, you wrote:
#define mpxs_output_flush(r, rcfg) \
/* if ($|) */ \
-if (IoFLUSH(PL_defoutgv)) { \
+if (bytes 0 IoFLUSH(PL_defoutgv)) { \
MP_FAILURE_CROAK(modperl_wbucket_flush(rcfg-wbucket, TRUE)); \
}
Best compression for mod_perl application?
I used to use mod_gzip under Apache 1.3, and it worked great, saving my over 50% of my bandwidth for my mod_perl generated pages. But, it appears that mod_gzip doesn't work with Apache 2. Apache 2 has a built-in mod_deflate, but I've had some trouble with it (seemed to cause a load spike on my server + errors if I print ). I recall there used to be alternatives to mod_gzip out there, but I'm not sure if they apply to Apache 2. Are any of you use compression on your mod_perl pages? Do you recommend any compression schemes for the Apache 2/mp2 environment? TIA, -=bill
Re: Best compression for mod_perl application?
That would be of my real interest to know as many details of Bill's
experience with mod_deflate as he can provide.
Since I posted my first message, I've been snooping around the 'net to find
more info on mod_gzip and mod_deflate. Here's what I came up with:
The general recommendation seems to be migration from mod_gzip to
mod_deflate when you switch to Apache 2.0. mod_gzip seems to have lost
most of its support going forward while mod_deflate is part of the Apache
source code and has active development.
There is a Apache 2.0 compatible version of mod_gzip, here:
http://www.gknw.de/development/apache/httpd-2.0/unix/modules/
When I tried it, it didn't work for me. It caused my site to spit out
blank pages and garbage. I had used my old Apache 1.3 mod_gzip config with
it. I read that there's some odd timing issues where the Apache 2.0
version of mod_gzip branched a long time ago and thus doesn't have some of
the modern mod_gzip 1.3.x features. I didn't get config errors, though,
just blanks and garbage. So, I decided to back away slowly for mod_gzip on
Apache 2.0. There is more discussion of it here:
http://freshmeat.net/projects/mod_gzip/?topic_id=90
There a good mod_gzip info page here, though little is said about a 2.0
version:
http://www.schroepl.net/projekte/mod_gzip/index.htm
The mod_gzip mailing list has some good info. Here's a 26 Jun 2003 post by
someone who seems to know well what's going on (I think the author of the
above page):
Subject: [Mod_gzip] gzip vs deflate on Apache
http://lists.over.net/pipermail/mod_gzip/2003-June/007130.html
So, I decided to try harder to move ahead with mod_deflate. I'm using a
built from scratch, Apache/2.0.46 mod_perl_1.99_09. Work is being done on
mod_deflate, some recent directives has been added (I hear). One of which
is DeflateCompressionLevel. Along with this addition in 2.0.44 came a
better default for this compression level. It's now 6, the same thing that
gzip and zlib uses by default. Apparently, it had been 1 before that,
which is fast but doesn't compress very well. There's some discussion of
this here:
http://www.webcompression.org/deflate-compress.html
My own personal experience with mod_deflate (in Apache/2.0.46) is that it
tends to spike my server's load. My server (gametz.com) is dual 800Mhz,
1.5GB ram, Linux, doing about 70K pages/day. Last night, I happened to be
watching it while the load jumped up a few points during my site's prime
time, so I pulled mod_deflate out of the config file and that fixed it.
So, today, I'm trying a lower DeflateCompressionLevel. I'm using 4 now
(instead of the default 6). This seems better, though the load is still a
little higher than it should be and I'm not quote at prime time
yet. Still, I am getting decent compression. I'm going to keep an eye on
it, I suspect I'll be at 3 later this evening.
I never had any trouble with load when I used mod_gzip and Apache 1.3.
The other odd problem I got was that if anywhere in my perl code I printed
nothing (e.g. print or $foo=;print $foo), I'd get this error:
error: 20014:Error string not specified yet at /my/perl/code.pl line 123
This error was both blurted to the error_log and to the web page (screwing
up the page and truncating further output).
I changed my code to print instead of (HTML ignores extra
white-space, so no biggie), and the errors all went away. So, I see this
as an annoyance more than a serious bug.
I really should try to tell the author of mod_deflate about these problems.
Here's the config I'm using for mod_deflate:
#
## Deflate
#
LoadModule deflate_module modules/mod_deflate.so
AddOutputFilterByType DEFLATE text/*
SetOutputFilter DEFLATE
# Make sure proxies don't deliver the wrong content
Header append Vary User-Agent env=!dont-vary
DeflateBufferSize 8096
# DeflateCompressionLevel 6
DeflateCompressionLevel 4
DeflateMemLevel 9
DeflateWindowSize 15
DeflateFilterNote Input instream
DeflateFilterNote Output outstream
DeflateFilterNote Ratio ratio
LogFormat '%r %{outstream}n/%{instream}n (%{ratio}n%%) %{User-agent}i'
defl\
ate
CustomLog /var/log/httpd/deflate_log deflate
All of which I cribbed from the Apache 2.0 manual:
http://httpd.apache.org/docs-2.0/mod/mod_deflate.html
I sort of got forced into upgrading to Apache 2.0/mp2/etc. by RedHat. They
announced they would pull support for old releases (all that used Apache
1.3) by the end of the year. Apparently, this may be an intentional
(evil?) business move by them to motivate more customers to move to their
Enterprise OS (which is very expensive, but has more stable software like
good old Apache 1.3 mp1).
I did try to go back at one point, builing Apache 1.3 from source, but it
had some other problem (maybe, because I used Perl 5.8.0?). But, then I
waffled and decided there's also a lot of value in staying current. So,
I'm back to 2.0 land, and I'm surviving so far.
-=bill
Re: Best compression for mod_perl application?
1. Are you using any Cascaded Stile Sheets and/of JavaScript libraries linked to your main web pages? I'm not, but... I think mod_defalte's hook is after all that is processed, so it's not especially relevant. 2. If yes, how do you turn compression off for those files in case of Netscape-4 originated request? http://httpd.apache.org/docs-2.0/mod/mod_deflate.html says to use this sort of thing: # Netscape 4.x has some problems... BrowserMatch ^Mozilla/4 gzip-only-text/html # Netscape 4.06-4.08 have some more problems BrowserMatch ^Mozilla/4\.0[678] no-gzip # MSIE masquerades as Netscape, but it is fine BrowserMatch \bMSIE !no-gzip !gzip-only-text/html # Don't compress images SetEnvIfNoCase Request_URI \.(?:gif|jpe?g|png)$ no-gzip dont-vary # Make sure proxies don't deliver the wrong content Header append Vary User-Agent env=!dont-vary
submit input truncation
I recently moved to Apache 2 + mod_perl2 and things have been working fairly well. But, I'm getting an intermittent problem with POSTs where the input data is being truncated. This causes havoc, especially in my forum system. I use CGI.pm, mod_perl 2, Apache 2, and the standard RH9 Perl (which is threaded) - I think that's all the relevant stuff. Has anyone else seen this? Is there some fix for it? I'm not even sure where the problem is yet. Thanks in Advance. -bill
Re: submit input truncation
At 04:48 PM 6/25/2003, Haroon Rafique wrote: I think you should take a look at the list archives for this thread: http://mathforum.org/epigone/modperl/bindondrei Thank You! This is very likely the problem I'm having. Secondly, you should also post the version numbers for all of the above-mentioned packages. As mentioned in one of the emails this was fixed in mod_perl 1.99_09. I'm using what comes with RH9: httpd-2.0.40-21.3 mod_perl-1.99_07-5 perl-5.8.0-88 plus, this which is the latest from cpan: CGI.pm-2.97 Clearly, the first thing I should try is mod_perl 1.99_09. Now, I'm wondering if someone has made a RH9 friendly mod_perl-1.99_09 rpm... As always, I'm trying desperately to avoid rebuilding apache/perl/mod_perl/etc. on my systems. -bill
mod_perl-1.99_09 for Redhat 9
I'm looking for a Redhat 9 compatible mod_perl-1.99_09 rpm. If anyone has one or knows where I can get one, let me know. Thanks, -bill p.s. I did find a Rawhide (bleeding edge Red Hat release, I think) mod_perl-1.99_09, but it doesn't seem to be compatible (I got an error from Apache).
2nd perl install?
If I can't find the mod_perl rpm I need, it's looking like I might need to build it from source. I believe this would mean also building Perl and Apache from source. Now, I have a redhat-installed Perl already. From past discussions, the best idea seemed to be to create a 2nd perl installation for Apache/mod_perl to use, perhaps located in /usr/local. The thing I'm fuzzy on is how to tell my mod_perl programs to use this mod_perl. Is it enough to have the LoadModule line point to my build-from-scratch mod_perl.so? Also, if I want to use this 2nd perl for scripts, is it as simple as changing the top line to #!/usr/local/bin/perl. Do I have to worry about library pathes or environment variables? I assume I'll need to keep separate lib/perl5 trees as well and I'll need to install the various cpan modules I use twice. Any tips would be appreciated. -bill
Re: MaxRequestsPerChild; which request am I?
On Fri, 4 Apr 2003, Brian Reichert wrote: In messing with Apache 1.x, is there a way, via mod-perl, of a request knowing how many requests have been served by the current child? $request++; That's what I do in some handler, and then I log it along with the PID. Eh? I'm confused. What is '$request' in that example? If you mean it's the request object, then that doesn't do what I expect. No, it's a simple counter. It's just a variable in some module that counts requests. -- Bill Moseley [EMAIL PROTECTED]
Re: MaxRequestsPerChild; which request am I?
On Fri, 4 Apr 2003, Brian Reichert wrote: Dunno if someone has a good answer, or a suggestion of a better forum for this: Apache has a configuration directive: MaxRequestsPerChild http://httpd.apache.org/docs/mod/core.html#maxrequestsperchild In messing with Apache 1.x, is there a way, via mod-perl, of a request knowing how many requests have been served by the current child? $request++; That's what I do in some handler, and then I log it along with the PID. -- Bill Moseley [EMAIL PROTECTED]
Re: Basic Auth logout
On Fri, 7 Mar 2003, Francesc Guasch wrote: this has been asked before, and I've found in the archives there is no way I could have a logout page for the Basic Auth in apache. Is there nothing I can do ? This is required only for the development team, so we need to let mozilla or IE forget about the username and password. It all depends on the browser and version. I have been able to logout some versions of IE by having a link to another protected resource of the same auth name but different username and password (in the link). You are just better maintaining a session on the server. -- Bill Moseley [EMAIL PROTECTED]
Re: Authorization question
On Thu, 27 Feb 2003, Perrin Harkins wrote: Jean-Michel Hiver wrote: Yes, but you're then making the authorization layer inseparable from your applicative layer, and hence you loose the interest of using separate handlers. It's pretty hard to truly separate these things. Nobody wants to use basic auth, which means there is a need for forms and handlers. Then you have to keep that information in either cookies or URLs, and there is usually a need to talk to an external data database with a site-specific schema. The result is that plug and play auth schemes only work (unmodified) for the simplest sites. Anyone using PubCookie? http://www.washington.edu/pubcookie/ -- Bill Moseley [EMAIL PROTECTED]
Is Sys::Signal still needed?
Searching the archives I don't see much discusson of Sys::Signal. Is it still needed to restore sig handlers? Thanks, -- Bill Moseley [EMAIL PROTECTED]
Re: web link broken when access cgi-bin
On Sunday 22 December 2002 03:49, Ged Haywood wrote: Hi there, On Sat, 21 Dec 2002, eric lin wrote: The image file:///home/enduser/mytest.jpg cannot be displayed, because it contains errors I think I understand your question but I am not sure of it. It seems that you have sent a request to Apache, received a response, And sent messages about using Windows to a Linux list, and CGI questions to mod_perl list and seems to ignore the many requests to read some basic CGI tutorials. I'd guess troll if he wasn't so clueless. ;)
Re: web link broken when access cgi-bin
On Sun, 22 Dec 2002, Richard Clarke wrote: And sent messages about using Windows to a Linux list, and CGI questions to mod_perl list and seems to ignore the many requests to read some basic CGI tutorials. I'd guess troll if he wasn't so clueless. ;) Since when did mod_perl becomes Linux only? oops, I meant to write: And sent messages about using Windows to a Linux list -- Bill Moseley [EMAIL PROTECTED]
Re: Fw: OT - Santa uses PERL
At 11:17 AM 12/20/02 +0200, Issac Goldstand wrote: >>>> http://www.perl.com/pub/a/2002/12/18/hohoho.html>http://www.perl.com/pub/a/2002/12/18/hohoho.html That sounds a lot like Perrin's story. Didn't he save Christmas one year? -- Bill Moseley mailto:[EMAIL PROTECTED]
Can't get nested files to work in Perl section
mod_perl 1.27 / httpd 1.3.27
In the perl httpd.conf below test.cgi is returned as the default type,
text/plain, where test2.cgi is run as a CGI script.
Do I have this setup incorrectly?
In a standard httpd.conf file it's allowable to have files nested within
directory, of course.
Perl
#!perl
$User = 'nobody';
$Group = 'users';
$ServerRoot = '/home/moseley/test';
$TypesConfig = '/dev/null';
$Listen = '*:8000';
$VirtualHost{'*:8000'} = {
ServerName = 'foo',
DocumentRoot = '/home/moseley/test',
ErrorLog = 'logs/error_log.8000',
TransferLog = 'logs/error_log.8000',
Files = {
'test2.cgi' = {
Options = '+ExecCGI',
SetHandler = 'cgi-script',
},
},
Directory = {
'/home/moseley/test' = {
Allow = 'from all',
Files = {
'test.cgi' = {
Options = '+ExecCGI',
SetHandler = 'cgi-script',
},
},
},
},
};
__END__
--
Bill Moseley
mailto:[EMAIL PROTECTED]
[OT] Ideas for limiting form submissions
I've got a mod_perl feed-back form that sends mail to a specific address.. Spammers have their bots hitting the form now. The tricks I know of are: - generate a random image of numbers and make the user type in the numbers on the form. Painful for the user and spammers probably have OCR! - require an email and send a confirmation email (like a list subscription) and whitelist some email addresses. But we want to allow anonymous submissions. - limit submissions by IP number to one every X minutes. AOL users may get blocked. - md5 the submission and block duplicates (should do this anyway). BTW -- what would you recommend for caching the md5 strings. Cache::Cache or DBM? I suppose a Cache::Cache file cache would be the easiest. Any other ideas on the easy to implement side? -- Bill Moseley [EMAIL PROTECTED]
Re: [OT] Ideas for limiting form submissions
At 02:51 PM 12/18/02 -0500, Daniel Koch wrote: Check out Gimpy, which I believe is what Yahoo uses: http://www.captcha.net/captchas/gimpy/ I'm thinking of something along those lines. This problem is this is on Solaris 2.6 w/o root, and I'll bet it would take some time to get The Gimp and GTK and whatever libs installed. So, I'm thinking about creating a directory of say 20 images of words. On the initial request the form creates a random key, and makes that a symlink to one of the images selected at random. That will be the img src link. Then md5 the symlink with a secret word to create a hidden field. The submitter will have to type in the word displayed in the image. On submit md5 all the symlinks with the secret word until a match is found -- match the submitted word text with the real image name, then unlink the symlink and accept the request. Cron can remove old symlinks. If the spammers put in the work to figure out the word by check-summing the images I can use imagemagic to modify the images -- that could be a nice mod_perl handler. See any glaring holes? -- Bill Moseley mailto:[EMAIL PROTECTED]
You can also use ps ...
In linux: ps -axl | grep http ... will show you process sizes. Doing it without the grep will show you the column headers in the first line.
RE: Cookie-free authentication
On Sat, 14 Dec 2002, Ron Savage wrote: Under Apache V 1/Perl 5.6.0 I could not get the Apache::AuthCookieURL option working which munged URLs without requiring cookies. I thought the problem was that Apache::AuthCookie was redirecting to your login scrip on logout instead of displaying your logout page. -- Bill Moseley [EMAIL PROTECTED]
[mp2]: Problem running scripts with Apache::compat and PerlRun.
-8-- Start Bug Report 8-- 1. Problem Description: I've been getting a consistent error attempting to run scripts with PerlRun and the Apache::compat layer. It may just be a configuration error, but I'd appreciate anything you could tell me. The error: [Fri Dec 06 01:47:27 2002] [error] [client 127.0.0.1] Use of uninitialized value in concatenation (.) or string at /usr/lib/perl5/site_perl/5.8.0/i386-linux-thread-multi/Apache2/Apache/compat.pm line 257. The httpd.conf: LoadModule perl_module modules/mod_perl.so PerlModule Apache2 PerlModule Apache::compat PerlModule Apache::Status Location /perl-status SetHandler perl-script PerlHandler Apache::Status Order Allow,Deny Allow from All /Location ... later in a VirtualHost: Alias /perl-bin/ /home/category/cgi/ Location /perl-bin/ SetHandler perl-script PerlHandler Apache::PerlRun Options +ExecCGI PerlSendHeader on /Location ... now I can get the perl-status page, so I know it's at least working in a minimal way. But whenever I try to run one of the .cgi scripts in /home/category/cgi, I get that error above. I'm running the CVS version, version 1.99_07 gave me the same error, but on line 250 of compat.pm rather than line 257. Am I doing something wrong? 2. Used Components and their Configuration: *** using lib/Apache/BuildConfig.pm *** Makefile.PL options: MP_AP_PREFIX= /home/httpd MP_GENERATE_XS = 1 MP_INST_APACHE2 = 1 MP_LIBNAME = mod_perl MP_USE_DSO = 1 MP_USE_STATIC = 1 *** /home/httpd/bin/httpd -V Server version: Apache/2.0.40 Server built: Sep 20 2002 15:43:46 Server's Module Magic Number: 20020628:0 Architecture: 32-bit Server compiled with -D APACHE_MPM_DIR=server/mpm/prefork -D APR_HAS_SENDFILE -D APR_HAS_MMAP -D APR_HAVE_IPV6 -D APR_USE_SYSVSEM_SERIALIZE -D APR_USE_PTHREAD_SERIALIZE -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT -D APR_HAS_OTHER_CHILD -D AP_HAVE_RELIABLE_PIPED_LOGS -D HTTPD_ROOT=/home/httpd -D SUEXEC_BIN=/home/httpd/bin/suexec -D DEFAULT_PIDLOG=logs/httpd.pid -D DEFAULT_SCOREBOARD=logs/apache_runtime_status -D DEFAULT_LOCKFILE=logs/accept.lock -D DEFAULT_ERRORLOG=logs/error_log -D AP_TYPES_CONFIG_FILE=conf/mime.types -D SERVER_CONFIG_FILE=conf/httpd.conf *** /usr/bin/perl -V Summary of my perl5 (revision 5.0 version 8 subversion 0) configuration: Platform: osname=linux, osvers=2.4.19-2mdkenterprise, archname=i386-linux-thread-multi uname='linux no.mandrakesoft.com 2.4.19-2mdkenterprise #1 smp tue aug 13 00:17:42 cest 2002 i686 unknown unknown gnulinux ' config_args='-des -Darchname=i386-linux -Dcc=gcc -Doptimize=-O3 -fomit-frame-pointer -pipe -mcpu=pentiumpro -march=i586 -ffast-math -fno-strength-reduce -Dprefix=/usr -Dvendorprefix=/usr -Dsiteprefix=/usr -Dman3ext=3pm -Dcf_by=MandrakeSoft -Dmyhostname=localhost -Dperladmin=root@localhost -Dd_dosuid -Ud_csh -Duseshrplib -Dusethreads' hint=recommended, useposix=true, d_sigaction=define usethreads=define use5005threads=undef useithreads=define usemultiplicity=define useperlio=define d_sfio=undef uselargefiles=define usesocks=undef use64bitint=undef use64bitall=undef uselongdouble=undef usemymalloc=n, bincompat5005=undef Compiler: cc='gcc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm', optimize='-O3 -fomit-frame-pointer -pipe -mcpu=pentiumpro -march=i586 -ffast-math -fno-strength-reduce', cppflags='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -I/usr/include/gdbm' ccversion='', gccversion='3.2 (Mandrake Linux 9.0 3.2-1mdk)', gccosandvers='' intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234 d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12 ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8 alignbytes=4, prototype=define Linker and Libraries: ld='gcc', ldflags =' -L/usr/local/lib' libpth=/usr/local/lib /lib /usr/lib libs=-lnsl -lndbm -lgdbm -ldl -lm -lpthread -lc -lcrypt -lutil perllibs=-lnsl -ldl -lm -lpthread -lc -lcrypt -lutil libc=/lib/libc-2.2.5.so, so=so, useshrplib=true, libperl=libperl.so gnulibc_version='2.2.5' Dynamic Linking: dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-rdynamic -Wl,-rpath,/usr/lib/perl5/5.8.0/i386-linux-thread-multi/CORE' cccdlflags='-fpic', lddlflags='-shared -L/usr/local/lib' Characteristics of this binary (from libperl): Compile-time options: MULTIPLICITY USE_ITHREADS USE_LARGE_FILES PERL_IMPLICIT_CONTEXT Built under linux Compiled at Sep 6 2002 23:24:44 %ENV: PERLLIB=/home/category/lib/perl5/site_perl/5.8.0/i386-linux-thread-multi:/home/category/lib/perl5/site_perl/5.8.0 PERL_LWP_USE_HTTP_10=1 @INC:
Re: Yahoo is moving to PHP ??
At 02:50 PM 10/30/02 -0500, Perrin Harkins wrote: Mithun Bhattacharya wrote: No it is not being removed but this could have been a very big thing for mod_perl. Can someone find out more details as to why PHP was preferred over mod_perl it cant be just on a whim. Think about what they are using it for. Yahoo is the most extreme example of a performance-driven situation. I also wonder if it's cheaper/easier to hire and train PHP programmers that Perl programmers. -- Bill Moseley mailto:moseley;hank.org
RE: [OTish] Version Control?
At 04:47 PM 10/30/02 -0500, Jesse Erlbaum wrote: Web development projects can map very nicely into CVS. We have a very mature layout for all web projects. In a nutshell, it boils down to this: project/ + apache/ + bin/ That requires binary compatibility, though. I have a similar setup, but the perl and Apache are built separately on the target machine since my machines are linux and the production machine is Solaris. I only work on single servers, so things are a bit easier. I always cvs co to a new directory on the production machine and start up a second set of servers on high ports. That lets me (and the client) test on the final platform before going live. Then it's apache stop mv live old mv new live apache start kind of thing, which is a fast way to update. I'd love to have the Perl modules in cvs, though. Especially mod_perl modules. It makes me nervous upgrading mod_perl on the live machine's perl library. Should make more use of PREFIX, I suppose. Speaking of cvs, here's a thread branch: I have some client admin features that they update via web forms -- some small amount of content, templates, and text-based config settings. I currently log a history of changes, but it doesn't have all the features of cvs. Is anyone using cvs to manage updates made with web-based forms? -- Bill Moseley mailto:moseley;hank.org
Re: [OTish] Version Control?
At 03:21 PM 10/30/02 -0800, [EMAIL PROTECTED] wrote: We check in all of our perl modules into CVS and its a _MAJOR_ life saver. Keeps everyone on the same path so to speak. I think I confused two different things: perl module source vs. installed modules. Do you check in the source or the installed modules? I keep the source of my perl modules under cvs, but not the perl library i.e. the files generated from make install, which might include binary components. I use a PREFIX for my own modules, but I tend to install CPAN modules in the main perl library. My own modules get installed in the application directory tree so that there's still a top level directory for the entire application/site. It does worry me that I'll update a CPAN module (or Apache::*) in the main Perl library and break something some day. (Although on things like updating mod_perl I have copied /usr/local/lib/perl5 before make install.) -- Bill Moseley mailto:moseley;hank.org
Re: libapreq-1.0 Seg Faults
Sorry, this bounced from my Mac.com acct :P On Friday, September 6, 2002, at 12:50 PM, William C (Bill) Jones wrote: This is a USELARGEFILES support issue. On Friday, September 6, 2002, at 12:16 PM, ODELL, TODD E (SWBT) wrote: ... Apache::Request it gives a 'segmentation fault (11)' in the error_log. Here, in Perl, it is defined: useperlio=3Dundef d_sfio=3Dundef uselargefiles=3Ddefine = usesocks=3Dundef And here: Characteristics of this binary (from libperl): Compile-time options: USE_LARGE_FILES To avoid this issue please try the following: Leave PERL alone! Rebuild mod_perl -- for example: perl Makefile.PL \ USE_APXS=3D1 \ WITH_APXS=3D/usr/local/apache/bin/apxs \ EVERYTHING=3D1 \ USE_DSO=3D1 # build mod_php - ./configure --with-apxs=3D/usr/local/apache/bin/apxs \ =A0 --enable-force-cgi-redirect \ =A0 --enable-discard-path \ =A0 --with-pear \ =A0 --enable-safe-mode \ =A0 --with-openssl \ =A0 --enable-bcmath \ =A0 --with-bz2 \ =A0 --with-gdbm \ =A0 --with-ndbm \ =A0 --enable-dio \ =A0 --enable-ftp \ =A0 --with-ldap \ =A0 --with-mysql=3D/usr/local/ \ =A0 --with-pgsql \ =A0 --enable-memory-limit # You may wish to remove those options which you might not already have=20= installed - like maybe pgsql, openssl, or ldap... Please correct for your filesys layout. Also, you may wish to see http://www.apachetoolbox.com/ HTH/Sx :]
mod_perl-based registration programs?
Before I start rewriting... Anyone know of a mod_perl based program for registering people for events? The existing system allows people to sign up and cancel for classes and workshops that are offered at various locations and also for on-line classes. We have a collection of training workshops that are each offered a number of times a year, and are taught by a pool of instructors. Typically a few classes a week. It mails reminders a few days before the classes, sends class lists to the assigned instructor before their class, and normal database stuff for displaying, searching and reporting. Currently, billing is by invoice, but we would like an on-line payment option. Anyone know of something similar? Thanks, Bill Moseley mailto:[EMAIL PROTECTED]
FreeBSD Apache/mod_perl/OpenSRS/expat problem + solution
(Apologies if you see this twice -- I sent it from an unsubscribed email address first.) Hi folks, I just ran down a problem that was somewhat hard to find, and I didn't see any mention of anything like it in the archives anywhere. I thought it might be helpful to mention the details in case someone else is ever in the same situation. I'm running FreeBSD 4.5, with perl 5.6.1 and Apache 1.3.24. I had a working installation of the regular OpenSRS perl code via cgi-bin, but I thought I'd get it running under Apache::Registry in mod_perl. To my surprise, the Apache daemons would dump core whenever I tried to log in with manage.cgi. It turns out that the current FreeBSD port of Apache uses it's own internal version of expat, which is an XML library of some kind. This internal version doesn't connect up well with the version that XML::Parser is expecting to find. Turning this off in the Apache build fixed the problem, and the OpenSRS code runs very nicely under mod_perl now. At this point, I don't understand what functionality I've lost by not having the expat code built into the Apache binary. The configure option to leave out expat is --disable-rule=EXPAT. In the FreeBSD port, that's easily added to the CONFIGURE_ARGS variable in the Makefile. I don't know if this applies to any other platform. My guess is that it could, since I think the default for Apache is to use the internal version of expat. Hope this helps someone! -- Bill O'Hanlon [EMAIL PROTECTED] Professional Network Services, Inc. 612-379-3958 http://www.pro-ns.net
Re: Logging under CGI
At 10:30 PM 06/10/02 -0400, Sam Tregar wrote: On Tue, 11 Jun 2002, Sergey Rusakov wrote: open(ERRORLOG, '/var/log/my_log'); print ERRORLOG some text\n; close ERRORLOG; This bit of code runs in every apache child. I worry abount concurent access to this log file under heavy apache load. Is there any problems on my way? You are correct to worry. You should use flock() to prevent your log file from becoming corrupted. See perldoc -f flock() for more details. Maybe it's a matter of volume. Or size of string written to the log. But I don't flock, and I keep the log file open between requests and only reopen if stat() shows that the file was renamed. So far been lucky. -- Bill Moseley mailto:[EMAIL PROTECTED]
FreeBSD Apache/mod_perl/OpenSRS/expat problem + solution
Hi folks, I just ran down a problem that was somewhat hard to find, and I didn't see any mention of anything like it in the archives anywhere. I thought it might be helpful to mention the details in case someone else is ever in the same situation. I'm running FreeBSD 4.5, with perl 5.6.1 and Apache 1.3.24. I had a working installation of the regular OpenSRS perl code via cgi-bin, but I thought I'd get it running under Apache::Registry in mod_perl. To my surprise, the Apache daemons would dump core whenever I tried to log in with manage.cgi. It turns out that the current FreeBSD port of Apache uses it's own internal version of expat, which is an XML library of some kind. This internal version doesn't connect up well with the version that XML::Parser is expecting to find. Turning this off in the Apache build fixed the problem, and the OpenSRS code runs very nicely under mod_perl now. At this point, I don't understand what functionality I've lost by not having the expat code built into the Apache binary. The configure option to leave out expat is --disable-rule=EXPAT. In the FreeBSD port, that's easily added to the CONFIGURE_ARGS variable in the Makefile. I don't know if this applies to any other platform. My guess is that it could, since I think the default for Apache is to use the internal version of expat. Hope this helps someone! -Bill -- Bill O'Hanlon [EMAIL PROTECTED] Professional Network Services, Inc. 612-379-3958 http://www.pro-ns.net
Re: FreeBSD Apache/mod_perl/OpenSRS/expat problem + solution
On Sun, Jun 09, 2002 at 12:43:38PM -0400, Perrin Harkins wrote: I just ran down a problem that was somewhat hard to find, and I didn't see any mention of anything like it in the archives anywhere. The expat issue has been discussed quite a bit on this list, and is documented here: http://perl.apache.org/guide/troubleshooting.html#Segfaults_when_using_X ML_Parser Sorry to hear you had trouble finding it. That section of the guide is the first place you should look when you're having segfault problems. - Perrin Eeek! Thanks the for the pointer to the warnings and errors guide. I guess when I first tried to find out what was going on by STFW, I thought it was something OpenSRS specific. Later, when I'd found something that seemed to work, I didn't go back and search for expat or XML_Parse. It's reassuring to see that the fix that I'd guessed at is the right one to use, though. Thanks again, -Bill -- Bill O'Hanlon [EMAIL PROTECTED] Professional Network Services, Inc. 612-379-3958 http://www.pro-ns.net
RE: [OT] MVC soup (was: separating C from V in MVC)
At 12:13 PM 06/08/02 +0100, Jeff wrote: The responsibility of the Controller is to take all the supplied user input, translate it into the correct format, and pass it to the Model, and watch what happens. The Model will decide if the instruction can be realised, or if the system should explode. I'd like to ask a bit more specific question about this. Really two questions. One about abstracting input, and, a bit mundane, building links from data set in the model. I've gone full circle on handling user input. I used to try to abstract CGI input data into some type of request object that was then passed onto the models. But then the code to create the request object ended up needing to know too much about the model. For example, say for a database query the controller can see that there's a query parameter and thus knows to pass the request to the code that knows how to query the database. That code passes back a results object which then the controller can look at to decide if it should display the results, a no results page and/or the query form again. Now, what happens is that features are added to the query code. Let's say we get a brilliant idea that search results should be shown a page at a time (or did Amazon patent that?). So now we want to pass in the query, starting result, and the page size. What I didn't like about this is I then had to adjust the so-called controller code that decoded the user input for my request object to include these new features. But really that data was of only interest to the model. So a change in the model forced a change in the controller. So now I just have been passing in an object which has a param() method (which, lately I've been using a CGI object instead of an Apache::Request) so the model can have full access to all the user input. It bugs me a bit because it feels like the model now has intimate access to the user input. And for things like cron I just emulate the CGI environment. So my question is: Is that a reasonable approach? My second, reasonably unrelated question is this: I often need to make links back to a page, such as a link for page next. I like to build links in the view, keeping the HTML out of the model if possible. But for something like a page next link that might contain a bunch of parameters it would seem best to build href in the model that knows about all those parameters. Anyone have a good way of dealing with this? Thanks, P.S. and thanks for the discussion so far. It's been very interesting. -- Bill Moseley mailto:[EMAIL PROTECTED]
[OT] MVC soup (was: separating C from V in MVC)
I, like many, find these discussion really interesting. I always wish there was some write up for the mod_perl site when all was said and done. But I guess one of the reasons it's so interesting is that there's more than one correct point of view. My MVC efforts often fall apart in the C an M separation. My M parts end up knowing too much about each other -- typically because of error conditions e.g. data that's passed to an M that does not validate. And I don't want to validate too much data in the C as the C ends up doing M's work. Anyone have links to examples of MVC Perl code (mostly controller code) that does a good job of M and C separation, and good ways to propagate errors back to the C? -- Bill Moseley mailto:[EMAIL PROTECTED]
Re: Scope of Perl Special Variables
Stas Bekman wrote: This explains why by default %ENV is set for each request afresh. http://perl.apache.org/guide/performance.html#PerlSetupEnv_Off Great. Thank you Stas. Now I know /how/ that happens, but I don't know /why/ the existing inctances' ENV is not clobbered. My guess is that a localized copy of the %ENV variable is created by the above referenced process, thus no clobbering of existing instances' %ENV occurs. Would that be correct? -Bill
Re: Scope of Perl Special Variables
I thought that using 'local' would successfully scope those globals to
within a sub, so you could,k for example, slurp an entire file by doing:
local $/ = undef;
my $file = FH;
Or am I wrong in that? I use it frequently, and don't seem to have any
troubles.
--Jon R.
It is my understanding that that is correct. I am a novice at mod_perl, but
your experience would seem to match up with my understanding of the Guide.
Local would scope it to within the enclosing block; so you could scope a
variable within a bare block so that it would be local to you package, but
shareable between subs.
# $/ equals default, global value
{
local $/ = undef;
sub { ... # $/ equals undef }
sub { ... # $/ equals undef }
sub { local $/ = \n\n; # localized value for sub }
# $/ back to undef
}
# $/ back to default, global value
-Bill
Throttling, once again
Hi, Wasn't there just a thread on throttling a few weeks ago? I had a machine hit hard yesterday with a spider that ignored robots.txt. Load average was over 90 on a dual CPU Enterprise 3500 running Solaris 2.6. It's a mod_perl server, but has a few CGI scripts that it handles, and the spider was hitting one of the CGI scripts over and over. They were valid requests, but coming in faster than they were going out. Under normal usage the CGI scripts are only accessed a few times a day, so it's not much of a problem have them served by mod_perl. And under normal peak loads RAM is not a problem. The machine also has bandwidth limitation (packet shaper is used to share the bandwidth). That combined with the spider didn't help things. Luckily there's 4GB so even at a load average of 90 it wasn't really swapping much. (Well not when I caught it, anyway). This spider was using the same IP for all requests. Anyway, I remember Randal's Stonehenge::Throttle discussed not too long ago. That seems to address this kind of problem. Is there anything else to look into? Since the front-end is mod_perl, it mean I can use mod_perl throttling solution, too, which is cool. I realize there's some fundamental hardware issues to solve, but if I can just keep the spiders from flooding the machine then the machine is getting by ok. Also, does anyone have suggestions for testing once throttling is in place? I don't want to start cutting off the good customers, but I do want to get an idea how it acts under load. ab to the rescue, I suppose. Thanks much, -- Bill Moseley mailto:[EMAIL PROTECTED]
Re: mod_perl and DB2
On 4/11/02 at 9:54 AM, [EMAIL PROTECTED] (David Shrewsbury) wrote: Hey gang. Couldn't find an answer to this in the archives. We have a DB2 database that we access via mod_perl scripts. We have been getting errors in the Apache log files every morning whenever we first try to access the database. The error is: [Thu Apr 11 09:09:49 2002] null: DBD::DB2::db selectall_arrayref failed: [IBM][C LI Driver] CLI0108E Communication link failure. SQLSTATE=40003 at /usr/local/ap achessl/perl/reports/trans_history.pl line 90 It takes a restart of the web server to eliminate this problem. Is this the Morning Bug that I am encountering? I looked at the DB2.pm module and it appears that the ping() method has been implemented so I would think that this would prevent the Morning Bug from showing up. Should I reimplement the ping() method according to the Apache::DBI manpage? -David I have many internal systems which use Apache::DBI and DBD::DB2. They're often up for months without being restarted, and I don't use ping(). So, it is possible. Are you the DBA too? A possibility is that the DB is being brought down into offline mode during the night for backups. That'd kill your cached connections. I'll send a fuller answer when I have a chance to reexamine our set up. Bill
RE: mod_perl Cook Book
At 09:59 AM 04/06/02 +0100, Phil Dobbin wrote: It's definitely the book to buy _before_ the Eagle book. No, buy both at the same time. I think the Eagle gives a really good foundation, and it's very enjoyable reading (regardless of what my wife says!). I still think the Eagle book is one of the best books on my bookshelf. I have a couple of Apache-specific books and I learned a lot more about Apache from the Eagle than those. The cook book has been a great addition. -- Bill Moseley mailto:[EMAIL PROTECTED]
Re: Apache::VMonitor not showing requests (might be Apache::Scoreboard problem)
Maybe adding this to your httpd.conf will help: ExtendedStatus On ?
RE: PDF generation
On 4/4/02 at 1:07 PM, [EMAIL PROTECTED] (Wilson, Allen) wrote: In reference to PDF::Create... Has anyone found any good documentation behind the module... I would like to print the results of a query to PDF and I not exactly sure whether I can use an array or a concatenate the results in a string. Allen AFAIK, the only docs are what comes with the distribution. For tabluar reports, I retrieve all my results as array's which get fed to a function that calculates x,y pixel offsets and print each item to its position. If you want to make a string out of each row, you'll have to use a fixed width font and calculate the needed spaces to pad each column and you'll still need to track vertical pixel position for each row, so it didn't seem to be much less work to me to go that route. Anyway, as I pointed out in my initial question, though PDF::Create has worked flawlessly for me for the last two years, it definitely seems to have been orphaned by its creator. If you're just getting started with perl-PDF generation, why not choose one of those recommended in this thread? My inclination would be use Matt Sergeant's PDFlib which seems well designed, but I have a (probably unjustifiable) knee-jerk reaction against having to license products. So, I'll give PDF::API2 a whack. Bill
PDF generation
Hi All I have a large number of mod_perl modules that connect to various databases and generate workflow performance reports for my organization. I give the users 3 output options: HTML, Excel (Spreadsheet::WriteExcel), and PDF. For PDF output I've been using PDF::Create, which has been at version .01 since 1999. It has worked flawlessly for my purposes for a couple of years, but is very limited. In fine form-follows-function fashion, the end users would now like the PDF output gussied up with graphics, etc. Does anyone have any strong (positive or negative) recommendations for which module(s) I should migrate to? TIA, Bill
Re: 'Pinning' the root apache process in memory with mlockall
At 10:53 PM 3/22/2002, Stas Bekman wrote: top and libgtop use the same source of information, so it has nothing to do with these tools. 'top' has the ability to display SWAP on a per-process basis (you have to change the defaults to see it, but it's there). I didn't find this per-process SWAP value in Gtop.pm anywhere. If GTop.pm had it, I could fix GTopLimit's bug. -bill
Re: 'Pinning' the root apache process in memory with mlockall
Stas, Thanks for tracking that down. So, the problem is our tools. For me, that's GTopLimit (but also SizeLimit). I would think it must be possible to cajole these two into realizing their error. top seems to know how much a process has swapped. If GTopLimit could know that, the number could be subtracted from the total used in calculating the amount of sharing (and the new unshared), then this bug would be resolved, right? I looked, but didn't see anything in Gtop.pm that gives swap per process, though. So, it's not going to be easy. I guess I'll turn of me deswapper... ...and GTopLimit as well. for now... hmm, maybe I could just avoid using the share-related trigger values in GTopLimit, and just use the SIZE one. That would be an acceptable compromise, though not the best. -bill
Re: Non-web use for Apache/mod_perl
Over the last year I've been slowly working on a similar system in my spare time (of which I have none). To do systems monitoring and reporting I'm using mod_perl on the front end and communicating with remote systems via XML::RPC. The XML::RPC server on the remote system runs local command via perl wrappers. These wrappers are now returning raw command output, but my next step is to have them convert it first to XML and then return it, where it can be stored in a DB (I use DB2) and/or processed by AxKit. I decided to go this way so I could delegate the customization of the local wrappers to other admins, because our site uses so many different platforms (AIX, Sun, linux, BSD, all stripes of Windows, OS/2, AS/400, OS/390, MacOS 9, MacOS X, etc etc). So far I've only been monitoring and reporting disk usage, just to get up and running. Bill
RE: loss of shared memory in parent httpd
The reason turning off swap works is because it forces the memory from the parent process that was swapped out to be swapped back in. It will not fix those processes that have been sired after the shared memory loss, as of Linux 2.2.15 and Solaris 2.6. (I have not checked since then for behavior in this regard, nor have I checked on other OSes.) In my case, I'm using Linux 2.4.17, when I turn off swap and turn it back on again, it restores the shared memory of both the parent and the children Apache processes. This seems counter-intuitive, as it would seem the kernel memory manager would have to bend over backwards to accomplish this re-binding of the swapped-out shared memory pages. Thus, it leads ones to wonder if some of our assumptions or tools used to monitor memory are inaccurate or we're misinterpreting them. -bill
Re: Creating a proxy using mod_perl
At 05:11 PM 3/15/2002 +0300, Igor Sysoev wrote: On Fri, 15 Mar 2002, Marius Kjeldahl wrote: I guess these all suffer from the fact that the parameters have to be specified in httpd.conf, which makes it impossible to pass a url to fetch from in a parameter, right? So mod_rewite with mod_proxy or mod_accel: RewriteRule /proxy_url=http://(.+)$http://$1 [L,P] Note that 'proxy?url=' is changed to 'proxy_url='. Any concern about being an open proxy there? I'd want to only proxy the sites I'm working with. I'd rather cache the images locally, just in case you are working with a slow site or if they do something silly like check referer on requests. Bill Moseley mailto:[EMAIL PROTECTED]
Re: [ANNOUNCE] The New mod_perl logo - results now in...
At 04:33 PM 03/15/02 -0500, Georgy Vladimirov wrote: I actually like the logo without the underscore. I don't think an underscore is very collaborative with art. The _ has always been irritating me a little. I know that there is history and nostalgia involved here but dropping an underscore at least in the logo is a nice evolution IMHO. I also agree with this, and is one of the reasons (I think) I voted for that design. It's a graphic design so I don't see that it needs to follow the Apache module naming convention exactly. Nor perl identifier names, either. Many of the designs offered didn't use the underscore as well. And the design that won didn't use one. It's a design -- it doesn't have to be accurate to the name. Besides, if it changes does it mean that the winning design received no votes? ;) -- Bill Moseley mailto:[EMAIL PROTECTED]
RE: loss of shared memory in parent httpd
It's copy-on-write. The swap is a write-to-disk. There's no such thing as sharing memory between one process on disk(/swap) and another in memory. agreed. What's interesting is that if I turn swap off and back on again, the sharing is restored! So, now I'm tempted to run a crontab every 30 minutes that turns the swap off and on again, just to keep the httpds shared. No Apache restart required! Seems like a crazy thing to do, though. You'll also want to look into tuning your paging algorithm. Yeah... I'll look into it. If I had a way to tell the kernel to never swap out any httpd process, that would be a great solution. The kernel is making a bad choice here. By swapping, it triggers more memory usage because sharing removed on the httpd process group (thus multiplied)... I've got MaxClients down to 8 now and it's still happening. I think my best course of action may be a crontab swap flusher. -bill
Re: Apache and Perl with Virtual Host
At 04:02 AM 3/14/2002, Matt Phelps wrote: Forgive me if I'm posting to the wrong group. Ive got apache 1.3.22 running several virtual webs. I can get perl scripts to run under the default web but not in the others. All the webs point to the same script folder. If I try to run the script under a virtual web, all I get is text display. Any help would be great. Well, I use mod_perl with VituralHosts... My config looks something like: VirtualHost gametz.com ServerAdmin [EMAIL PROTECTED] DocumentRoot /home/tz/html ServerName gametz.com DirectoryIndex /perl/gametz.pl # The live area Alias /perl/ /home/tz/perl/ Location /perl AllowOverride None SetHandler perl-script PerlHandler Apache::RegistryBB PerlSendHeader On Options+ExecCGI /Location /VirtualHost VirtualHost surveycentral.org ServerAdmin [EMAIL PROTECTED] DocumentRoot /projects/web/survey-central ServerName surveycentral.org DirectoryIndex /perl/survey.pl Alias /perl/ /projects/web/survey-central/perl/ Location /perl SetHandler perl-script PerlHandlerApache::RegistryBB PerlSendHeader On Options+ExecCGI /Location /VirtualHost
Re: [OT]RE: loss of shared memory in parent httpd
How is it even remotely possible that turning off swap restores memory shared between processes? Is the Linux kernel going from process to process comparing pages of memory as they re-enter RAM? Oh, those two look identical, they'll get shared? This is a good point. I really have no clue how the kernel deals with swapping/sharing, so I can only speculate. I could imagine that it's possible for it to do this, if the pages are marked properly, they could be restored. But, I'll admit, it seems unlikely. ...and, I had this thought before. Maybe this apparent loss of shared memory is an illusion. It appears to make the amount of memory that the httpds use grow very high, but perhaps it is a kind of shared-swap, and thus the calculation I'm using to determine overall memory usage would need to also factor out swap. ...in which case, there's no problem at all. But, I do see an albeit qualitative performance increase and CPU load lowering when I get the httpds to stay shared (and unswapped). So, I think it does matter. Though, if you think about it, it sort of makes sense. Some portion of the shared part of the httpd is also not being used much, so it gets swapped out to disk. But, if those pages really aren't being used, then there shouldn't be a performance hit. If they are being used, then they'd get swapped back in. ...which sort of disproves my qualitative reasoning that swap/unshared is bad. my head hurts, maybe I should join a kernel mailing list and see is someone there can help me (and if I can understand them). -bill
Re: loss of shared memory in parent httpd
I just wanted to mention that the theory that my loss of shared memory in the parent is related to swapping seems to be correct. When the lack of sharing occurs, it is correlated with my httpd processes showing a SWAP (from top/ps) of 7.5MB, which is roughly equal to the amount of sharing that I lose. I've been lowering my MaxClients setting (from 25 to 10, so far) in hopes of finding a new balance where SWAP is not used, and more RAM is on order. Thanks -bill
loss of shared memory in parent httpd
I'm a heavy mod_perl user, running 3 sites as virtual servers, all with lots of custom Perl code. My httpd's are huge(~50mb), but with the help of a startup file I'm able to get them sharing most of their memory(~43). With the help of GTopLimit, I'm able to keep the memory usage under control. But... recently, something happened, and things have changed. After some random amount of time (1 to 40 minutes or so, under load), the parent httpd suddenly loses about 7-10mb of share between it and any new child it spawns. As you can imagine, the memory footprint of my httpds skyrockets and the delicate balance I set up is disturbed. Also, GTopLimit is no help in this case - it actually causes flailing because each new child starts with memory sharing that is out of bounds and is thus killed very quickly. Restarting Apache resets the memory usage and restores the server to smooth operation. Until, it happens again. Using GTop() to get the shared memory of each child before and after running my perl for each page load showed that it wasn't my code causing the jump, but suddenly the child, after having a good amount of shared memory in use, loses a 10MB chunk and from then on the other children follow suit. So, something I did on the server (I'm always doing stuff!) has caused this change to happen, but I've been pulling my hair out for days trying to track it down. I am now getting desperate. One of the recent things I did was to run tux (another web server) to serve my images, but I don't see how that could have any effect on this. If anyone has any ideas what might cause the httpd parent (and new children) to lose a big chunk of shared memory between them, please let me know. Thanks in advance, -bill
Re: loss of shared memory in parent httpd
Thanks for all the great advice. A number of you indicated that it's likely due to my apache processes being partially swapped to disk. That seems likely to me. I haven't had a chance to prove that point, but when it does it again and I'm around, I plan to test it with free/top (top has a SWAP column which should show if my apaches are swapped out at all). I am in the process of getting a memory upgrade, so that should ease this problem. Meanwhile, I can set MaxClients lower and see if that keeps me out of trouble as well. I suspect adding the tux server disrupted the balance I had (apparently, I was tuned pretty close to my memory limits!) Yes, I am running on Linux... One more piece of advice: I find it easier to tune memory control with a single parameter. Setting up a maximum size and a minumum shared size is not as effective as setting up a maximum *UNSHARED* size. After all, it's the amount of real memory being used by each child that you care about, right? Apache::SizeLimit has this now, and it would be easy to add to GTopLimit (it's just $SIZE - $SHARED). Doing it this way helps avoid unnecessary process turnover. I agree. For me, with my ever more bloated Perl code, I find this unshared number to be easier to keep a lid on. I keep my apache children under 10MB each unshared as you say. That number is more stable that the SIZE/SHARED numbers that GTopLimmit offers. But, I have the GTopLimit sources, so I plan to tweak them to allow for an unshared setting. I think I bugged Stas about this a year ago and he had a reason why I was wrong to think this way, but I never understood it. -bill
trouble with GTop and
When I install the recent Redhat 7.2 updates for glibc: glibc-2.2.4-19.3.i386.rpm glibc-common-2.2.4-19.3.i386.rpm glibc-devel-2.2.4-19.3.i386.rpm It breaks my Apache GTop-based Perl modules, in a way that I don't understand. Here is are the error messages from my httpd/error_log: [Tue Mar 12 15:44:37 2002] [error] Can't load '/usr/lib/perl5/site_perl/5.6.0/i386-linux/auto/GTop/GTop.so' for module GTop: /usr/lib/libgdbm.so.2: undefined symbol: gdbm_errno at /usr/lib/perl5/5.6.1/i386-linux/DynaLoader.pm line 206. at /usr/lib/perl5/site_perl/5.6.0/i386-linux/GTop.pm line 12 Compilation failed in require at /usr/lib/perl5/site_perl/5.6.0/Apache/GTopLimit.pm line 144. BEGIN failed--compilation aborted at /usr/lib/perl5/site_perl/5.6.0/Apache/GTopLimit.pm line 144. Compilation failed in require at /home/httpd/startup.pl line 32. BEGIN failed--compilation aborted at /home/httpd/startup.pl line 32. Compilation failed in require at (eval 1) line 1. Syntax error on line 1017 of /etc/httpd/conf/httpd.conf: Can't load '/usr/lib/perl5/site_perl/5.6.0/i386-linux/auto/GTop/GTop.so' for module GTop: /usr/lib/libgdbm.so.2: undefined symbol: gdbm_errno at /usr/lib/perl5/5.6.1/i386-linux/DynaLoader.pm line 206. at /usr/lib/perl5/site_perl/5.6.0/i386-linux/GTop.pm line 12 Compilation failed in require at /usr/lib/perl5/site_perl/5.6.0/Apache/GTopLimit.pm line 144. BEGIN failed--compilation aborted at /usr/lib/perl5/site_perl/5.6.0/Apache/GTopLimit.pm line 144. Compilation failed in require at /home/httpd/startup.pl line 32. BEGIN failed--compilation aborted at /home/httpd/startup.pl line 32. Compilation failed in require at (eval 1) line 1. Anyone have a clue about what I'd need to do to get this working? I am able to force the old glibc rpms back on to fix the problem. The previous versions that work for me are: glibc-common-2.2.4-13 glibc-devel-2.2.4-13 glibc-2.2.4-13 -bill
[WOT] Google Programming Contest.
Sorry for the Way Off Topic, and sorry if I missed this on the list already: http://www.google.com/programming-contest/ They say C++ or Java. What, no Perl? -- Bill Moseley mailto:[EMAIL PROTECTED]
Re: New mod_perl Logo
At 07:29 PM 01/29/02 -0500, Chris Thompson wrote: Well, I'd like to just throw one idea into the mix. It's something that's bugged me for a long time, no better time than the present. mod_perl is a lousy name. I don't know about lousy, but I do agree. I brought this up on the docs-dev list: http://search.apache.org/archives/docs-dev/0236.html During the week I posted that I had run into PHP programmers at a computer show, more PHP programmers at a pub (2 in the afternoon -- more out of work programmers), and ended up talking with a couple of Java programmers one day. The amazing thing was they all had a completely weird idea about what mod_perl is or what it does. And all thought it was slow, old, dead, not scalable, technology. And that was from programmers, not managers. We all know there is a lot of misinformation out there. Marketing is not everything, but it's a lot! What we know of mod_perl is more than just perl+Apache, really. It's a development platform, or development suite. It can be anything our marketing department says it is. ;) In these tough economic times, repackaging might be helpful. Who knows? And for some of us we know that mod_perl is also something that makes up a chunk of our livelihood. So, the promotion of mod_perl is quite important, unless we want to start spending more afternoons with those PHP programmers down at the corner pub. So how would a group like the mod_perl community promote itself in new ways? Well, other professionals often have professional organizations or associations to represent and promote their members. I wonder if there are there enough mod_perl programmers to support something like that. Even if there were, what could be done? Run a few print ads in magazines that system admins read? Hire an ad firm for help in developing our brand? mod_perl coffee mugs? (Tired of that old cup of Java?) Free mod_perl clinics? Hard to imagine any of that actually happening, really. So what's a group of programmers to do? The new web site should help, to some degree, but I'm not sure it will change any manager's mind on the technology they pick to run their applications. Of course, most people here have access to big pipes. So, there's always bulk mail ads. I got mail just today saying that it's an effective way to advertise. In fact I got about ten of those today! -- Bill Moseley mailto:[EMAIL PROTECTED]
Re: META tags added as HTTP headers
At 01:20 AM 01/19/02 +0100, Markus Wichitill wrote: which part of an Apache/mod_perl setup is responsible for extracting META tags from generated HTML and adding them as HTTP headers (even with PerlSendHeaders Off)? That's lwp doing that, not Apache or mod_perl. HEAD http://www.apache.org 200 OK Cache-Control: max-age=86400 Connection: close Date: Sat, 19 Jan 2002 00:27:10 GMT Accept-Ranges: bytes Server: Apache/2.0.28 (Unix) Content-Length: 7810 Content-Type: text/html Expires: Sun, 20 Jan 2002 00:27:10 GMT Client-Date: Sat, 19 Jan 2002 00:27:17 GMT Client-Request-Num: 1 Client-Warning: LWP HTTP/1.1 support is experimental -- Bill Moseley mailto:[EMAIL PROTECTED]
Re: META tags added as HTTP headers
At 04:46 PM 01/18/02 -0800, ___cliff rayman___ wrote: hmmm - you are still using lwp. Right. But lwp-request sends a GET request where HEAD sends, well, a HEAD request. So, even though LWP's default is to parse the head section, there's no content to parse in a HEAD request, and thus the meta headers don't show up. -- Bill Moseley mailto:[EMAIL PROTECTED]
Re: Alarms?
At 06:56 PM 01/10/02 +0300, [EMAIL PROTECTED] wrote: Hello! I'm getting lots of errors in log: [Thu Jan 10 18:54:33 2002] [notice] child pid 8532 exit signal Alarm clock (14) I hope I remember this correctly: What's happening is you are setting a SIGALRM handler in perl, but perl is not correctly restoring Apache's handler when yours goes out of scope. So then a non-mod_perl request times out there's not handler and the process is killed. Check: http://thingy.kcilink.com/modperlguide/debug/Debugging_Signal_Handlers_SIG_.html http://thingy.kcilink.com/modperlguide/debug/Handling_Server_Timeout_Cases_an.html -- Bill Moseley mailto:[EMAIL PROTECTED]
Re: Template-Toolkit performance tuning
At 05:17 PM 12/30/01 -0600, Ryan Thompson wrote:
use Template;
my %vars;
$var{foo} = bar; # About 30 scalars like this
.
.
my $tt = new Template({INTERPOLATE = 1});
Cache your template object between requests.
--
Bill Moseley
mailto:[EMAIL PROTECTED]
Searchable archives (was: [modperl site design challenge] and the winner is...)
At 02:13 PM 12/24/01 +0800, Stas Bekman wrote: FWIW, we are having what seems to be a very productive discussion at docs-dev mailing list. Unfortunately no mail archiver seem to pick this list up, so only the mbox files are available: http://perl.apache.org/mail/docs-dev/ Is anyone up to make the searchable archives available? We have a bunch of lists that aren't browsable/searchable :( http://perl.apache.org/#maillists Hi Stas, Any reason to not use hypermail? Do you have mbox files for all the lists in question? I could setup searchable archives like this example, if you like. http://search.apache.org/docs-dev/ (this URL is temporary!) Bill Moseley mailto:[EMAIL PROTECTED]
Re: Can I use mod_perl to pass authentication details to apache from an HTML form?
At 08:49 AM 12/24/2001 -, Chris Thompson wrote: I would like to set up a password-protected area within my website where my web design clients can preview changes to their sites before they go live. Although I know how to password protect directories using .htaccess files, I would prefer to bypass the standard grey Authorization pop-up screen and instead let users enter their username / password details through an HTML form (which I think would look more professional). Take a look at Apache::AuthCookie. If possible, the system for authenticating / authorizing the user would also redirect them to the appropriate directory for their site. You can do that, or you can just have them go directly to their area, and have the authentication system intercept the request. This is what Apache::AuthCookie does. You might also look at Apache::AuthCookieURL if there's a chance that your users might not have cookies enabled. Bill Moseley mailto:[EMAIL PROTECTED]
Re: [modperl site design challenge] and the winner is...
I'm throwing in my two cents a bit late, so it's a bit depreciated now (one cent?). But something to think about for the site. I've worked with php a little lately -- not programming, but making minor changes to a site. I've used the php site http://www.php.net/ a few times, and I've found it reasonably functional, but also quite easy for someone new to php. Maybe it seems that way because I know nothing about php and it's geared toward my level. But that's good. How often to the mod_perl pros need to read the mod_perl home page? I'm sure all these elements will be added to the new mod_perl site in some way, but I just wanted to note what I liked about the php site. And I'm not comparing mod_perl to php! What the php site shows in a real obvious way is: 1) what is php (for someone that is brand new) with a link to some basic examples. It demystifies php in a hurry. Makes someone think Oh, I can do that. 2) currently, it's showing Netcraft's usage stats, so I see that people are using it in growing numbers -- it's not a dead-end for a new person to try out. 3) it shows upcoming events. That shows that there's a real support group of real people to work with. Links to discussion lists archives would be good there. All that makes it really easy for someone new to feel comfortable. It would be nice to see license info, too, as someone new might want to be clear on that right away, too. You can also quickly see a list of supported modules. This shows that it's easy to extend, but also allows someone to see that it can do the thing *they* might be interested in. Sure, perl has CPAN, but I think it would be good to show a list of commonly used modules for mod_perl, and what they do, in a simple list. If someone is just learning about mod_perl (or php) the list doesn't need to be that big, as their needs will be reasonably basic. Existing mod_perl (or php?) programmers might not like all that basic, first-time user stuff right on the home page, and would rather have a more functional site. I don't know about anyone else, but I've got the links I need bookmarked, and if not I go to perl.apache.org and ^F right to where I want to go. BTW -- At first I liked David's idea of using the ASF look. That ties mod_perl to apache well. But, if the site is intended to bring in new users, it might be good to be a bit more flashy. crazy idea Maybe as a community (of programmers not designers) we could hire a professional designer to help develop our brand. Cool web site. Some print ads in the trades. What's a small amount in dues to the Association of Mod_perl Programmers compared to increase of mod_perl work overall? /crazy idea Bill Moseley mailto:[EMAIL PROTECTED]
Re: Comparison of different caching schemes
Ok, I'm a bit slow... At 03:05 PM 12/12/01 +1100, Rob Mueller (fastmail) wrote: >>>> Just thought people might be interested... Seems like they were! Thanks again. I didn't see anyone comment about this, but I was a bit surprised by MySQLs good performance. I suppose caching is key. I wonder if things would change with 50 or 100 thousand rows in the table. I always assumed something like Cache::FileCache would have less overhead than a RDMS. It's impressive. >>>> Now to the results, here they are. Package C0 - In process hash Sets per sec = 147116 Gets per sec = 81597 Mixes per sec = 124120 Package C1 - Storable freeze/thaw Sets per sec = 2665 Gets per sec = 6653 Mixes per sec = 3880 Package C2 - Cache::Mmap Sets per sec = 809 Gets per sec = 3235 Mixes per sec = 1261 Package C3 - Cache::FileCache Sets per sec = 393 Gets per sec = 831 Mixes per sec = 401 Package C4 - DBI with freeze/thaw Sets per sec = 651 Gets per sec = 1648 Mixes per sec = 816 Package C5 - DBI (use updates with dup) with freeze/thaw Sets per sec = 657 Gets per sec = 1994 Mixes per sec = 944 Package C6 - MLDBM::Sync::SDBM_File Sets per sec = 334 Gets per sec = 1279 Mixes per sec = 524 Package C7 - Cache::SharedMemoryCache Sets per sec = 42 Gets per sec = 29 Mixes per sec = 32 Bill Moseley mailto:[EMAIL PROTECTED]
Re: [RFC] Apache::CacheContent - Caching PerlFixupHandler
At 08:19 AM 12/06/01 -0800, Paul Lindner wrote: Ok, hit me over the head. Why wouldn't you want to use a caching proxy? BTW -- I think where the docs are cached should be configurable. I don't like the idea of the document root writable by the web process. Bill Moseley mailto:[EMAIL PROTECTED]
Re: [RFC] Apache::CacheContent - Caching PerlFixupHandler
At 10:33 AM 12/06/01 -0800, Paul Lindner wrote: On Thu, Dec 06, 2001 at 10:04:26AM -0800, Bill Moseley wrote: At 08:19 AM 12/06/01 -0800, Paul Lindner wrote: Ok, hit me over the head. Why wouldn't you want to use a caching proxy? Apache::CacheContent gives you more control over the caching process and keeps the expiration headers from leaking to the browser. Ok, I see. Or maybe you want to dynamically control the TTL? Would you still use it with a front-end lightweight server? Even with caching, a mod_perl server is still used to send the cached file (possibly over 56K modem), right? Bill Moseley mailto:[EMAIL PROTECTED]
Re: Hi
At 05:13 PM 12/04/01 -0500, Robert Landrum wrote: If this guy is going to be sending us shit all night, I suggest we deactivate his account. Now that would be fun! Oh, you mean by unsubscribing him. I was thinking of something more sporting. What's the collective bandwidth of the people on this list? Just kidding. Bill Moseley mailto:[EMAIL PROTECTED]
Re: [OT] log analyzing programs
At 10:09 AM 12/2/2001 +, Matt Sergeant wrote: PID USERNAME THR PRI NICE SIZE RES STATE TIMECPU COMMAND 17223 operator 1 442 747M 745M cpu14 19.2H 45.24% wusage Ouch. Try analog. PID USERNAME THR PRI NICE SIZE RES STATE TIMECPU COMMAND 17223 operator 1 02 747M 745M cpu14 27.1H 47.57% wusage Well at least after another 8 hours of CPU it's not leaking ;) Bill Moseley mailto:[EMAIL PROTECTED]
[OT] log analyzing programs
Any suggestions for favorite ones? wusage seems to require a lot of resources -- maybe that's not unusual? It runs once a week. Here's a about six days worth of requests. Doesn't see like that many. %wc -l access_log 1185619 access_log PID USERNAME THR PRI NICE SIZE RES STATE TIMECPU COMMAND 17223 operator 1 442 747M 745M cpu14 19.2H 45.24% wusage Bill Moseley mailto:[EMAIL PROTECTED]
Re: [OT] Re: search.cpan.org
At 12:55 PM 11/27/01 -0800, Nick Tonkin wrote: Because it does a full text search of all the contents of the DB. Perhaps, but it's just overloaded. I'm sure he's working on it, but anyone want of offer Graham free hosting? A few mirrors would be nice, too. (Plus, all my CPAN.pm setups are now failing to work, too) Bill Moseley mailto:[EMAIL PROTECTED]
Re: [OT] Re: search.cpan.org
At 09:02 PM 11/27/01 +, Mark Maunder wrote: I'm using it on our site and searching fulltext indexes on three fields (including a large text field) in under 3 seconds on over 70,000 records on a p550 with 490 megs of ram. Hi Mark, plug Some day if you are bored, try indexing with swish-e (the development version). http://swish-e.org The big problem with it right now is it doesn't do incremental indexing. One of the developers is trying to get that working with in a few weeks. But for most small sets of files it's not an issue since indexing is so fast. My favorite feature is it can run an external program, such as a perl mbox or html parser or perl spider, or DBI program or whatever to get the source to index. Use it with Cache::Cache and mod_perl and it's nice and fast from page to page of results. Here's indexing only 24,000 files: ./swish-e -c u -i /usr/doc Indexing Data Source: File-System Indexing /usr/doc 270279 unique words indexed. 4 properties sorted. 23840 files indexed. 177638538 total bytes. Elapsed time: 00:03:50 CPU time: 00:03:16 Indexing done! Here's searching: ./swish-e -w install -m 1 # SWISH format: 2.1-dev-24 # Search words: install # Number of hits: 2202 # Search time: 0.006 seconds # Run time: 0.011 seconds A phrase: ./swish-e -w 'public license' -m 1 # SWISH format: 2.1-dev-24 # Search words: public license # Number of hits: 348 # Search time: 0.007 seconds # Run time: 0.012 seconds 998 /usr/doc/packages/ijb/gpl.html gpl.html 26002 A wild card and boolean search: ./swish-e -w 'sa* or java' -m 1 # SWISH format: 2.1-dev-24 # Search words: sa* or java # Number of hits: 7476 # Search time: 0.082 seconds # Run time: 0.087 seconds Or a good number of results: ./swish-e -w 'is or und or run' -m 1 # SWISH format: 2.1-dev-24 # Search words: is or und or run # Number of hits: 14477 # Search time: 0.084 seconds # Run time: 0.089 seconds Or everything: ./swish-e -w 'not dksksks' -m 1 # SWISH format: 2.1-dev-24 # Search words: not dksksks # Number of hits: 23840 # Search time: 0.069 seconds # Run time: 0.074 seconds This is pushing the limit for little old swish, but here's indexing a few more very small xml files (~150 bytes each) 3830016 files indexed. 582898349 total bytes. Elapsed time: 00:48:22 CPU time: 00:44:01 /plug Bill Moseley mailto:[EMAIL PROTECTED]
Re: [modperl-site design challenge]
At 11:14 AM 11/26/01 -0500, John Saylor wrote: * While the design might not be to cool from the designers point of view, I like it because it is simple, doesn't use HTML-tables, is small and fast (/very/ little HTML-overhead) and accessible to disabled people. But that *is* cool. I think it's very well designed. To me, usability is the main design goal. Keep up the good work! Does it need to render well in old browsers? (e.g. netscape 4.08) There's a lot of old browsers out there, but maybe anyone looking at mod_perl would be a bit more up to date... Bill Moseley mailto:[EMAIL PROTECTED]
Re: Apache::Registry HEAD request also return document body
At 11:43 AM 11/23/2001 +, Jean-Michel Hiver wrote: PROBLEM HERE A head request should * NOT * return the body of the document You should check $r-header_only in your handler. http://thingy.kcilink.com/modperlguide/correct_headers/3_1_HEAD.html Bill Moseley mailto:[EMAIL PROTECTED]
Re: Apache::AuthCookie login faliure reason
At 04:09 PM 11/23/2001 +1100, simran wrote: Hi All, I am having some trouble getting Apache::AuthCookie (version 3 which i believe is the latest version) to do what want: What i want is: * To be able to give the user a reson if login fails - eg reason: * No such username * Your password was incorrect Has anyone else come across the same requirement/issue, and how have you solved it? Apache::AuthCookieURL does that. IIRC, it sets a cookie with the failure reason that's returned from authen_cred call. Bill Moseley mailto:[EMAIL PROTECTED]
Re: Apache::Registry HEAD request also return document body
At 02:53 PM 11/23/01 +, Jean-Michel Hiver wrote:
My only concern is that I thought that Apache::Registry was designed
to act as a CGI emulator, allowing not so badly written CGIs to have
mod_perl benefits without having to change them.
Right, sorry I completely missed the Registry part!
Try HEAD on this script.
#!/usr/local/bin/perl -w
use CGI;
my $q = CGI-new;
print $q-header, $q-start_html,
join( BR\n, map { $_ : $ENV{$_} } keys %ENV),
$q-end_html;
If I have to use the $r object (and therefore the Apache module), then
it means that the scripts won't be able to run as standalone CGIs...
Am I right?
Right, maybe that's a good thing ;) (I acutally mix mod_perl code in
applicatins that will run under both.)
Bill Moseley
mailto:[EMAIL PROTECTED]
Re: Apache::Registry HEAD request also return document body
At 03:21 PM 11/23/01 +, Jean-Michel Hiver wrote: Duh... That's a lot of info for a head request :-) Yes, and that's what I get for using HEAD to test! Yesterday's holliday doesn't help todays thinking. How about patching Apache::Registry? Oh, Stas, of course, just posted a better solution. Maybe I'll have better luck repairing my car today. Bill Moseley mailto:[EMAIL PROTECTED]
[OT] Re: Seeking Legal help
At 03:21 PM 11/21/01 -0800, Medi Montaseri wrote: I did some work (about $25000 worth) for a customer and I'm having problem collecting. This has been beaten to death on the list, but... (and I'm not a lawyer, but I drink beer with one), If you think they are going Chapter 11, then you may want to try to bargain down to some amount to get something, so you are not on their list of creditors. When they do file, if that's the case, they have to notify the court of their creditors and then the court is suppose to notify you. You must then file a proof of claim, and get in line with everyone else. If you think they might fail to list you as a creditor when they file, contact the court every few weeks and check if they have already filed, and file your proof of claim. Then at least you might get a penny on the dollar... $25K is a bad number, in that it's too big for small claims court, and it's too little to get much help from lawyers in a law suit, I'd guess. Ask them if they want to pay partially in hardware and you might get a good idea of their direction ;). Good luck, Bill Moseley mailto:[EMAIL PROTECTED]
Re: Cookie authentication
At 02:02 PM 11/15/01 -0600, John Michael wrote: >>>> This may seem off subject but, If you bare with me, I don't think it is. I am interested in using the cookie based system referred to in the programming the apache api book but oftend wonder this. Can you count on everyone to use cookies. Sometime back I wrote a module based on Apache::AuthCookie called Apache::AuthCookieURL that uses cookies, or falls back to munged URLs if cookies were not enabled. It's on CPAN. I wrote it for a site where people come in from public libraries. The requirement was that it had to do sessions even if cookies were disabled (as it was common for the public libraries to have cookies disabled). It's been a while since I looked at it. I had added a way to disable the authen requirement for areas of the site (or everywhere), so it could be used just for dealing with sessions. Do be careful about session hijacking. Bill Moseley mailto:[EMAIL PROTECTED]
Re: Cookie authentication
At 05:20 PM 11/15/01 -0600, John Michael wrote: Thanks. I did not know that you could verify that someone has cookies turned on. Can you point me to where i can find out how to do this? Is there a variable that you can check? You set a cookie and do a redirect (if you need the cookie right away). If it comes back with a cookie then they are enabled. Bill Moseley mailto:[EMAIL PROTECTED]
Re: how to install the XML::LibXSLT along with libxslt?
At 08:03 PM 11/14/01 -0800, SubbaReddy M wrote: Maybe a question for the libxml2 list instead of mod_perl? So, while installing libxslt-1.0.6 i am getting error atlast, that is " checking for libxml libraries >= 2.4.7... ./configure: xml2-config: command not found " Did you make install libxml2? > which xml2-config /usr/local/bin/xml2-config >>>> Bill Moseley mailto:[EMAIL PROTECTED]
[OT] Data store options
Hi, verbose I'm looking for a little discussion on selecting a data storage method, and I'm posting here because Cache::Cache often is discussed here (along with Apache::Session). And people here are smart, of course ;). Basically, I'm trying to understand when to use Cache::Cache, vs. Berkeley DB, and locking issues. (Perrin, I've been curious why at etoys you used Berkeley DB over other caching options, such as Cache::Cache). I think RDBMS is not required as I'm only reading/writing and not doing any kind of selects on the data -- also I could end up doing thousands of selects for a request. So far, performance has been good with the file system store. My specifics are that I have a need to permanently store tens of thousands of smallish (5K) items. I'm currently using a simple file system store, one file per record, all in the same directory. Clearly, I need to move into a directory tree for better performance as the number of files increases. The data is accessed in a few ways: 1) Read/write a single record 2) Read anywhere from a few to thousands of records in a request. This is the typical mod_perl-based request. I know the record IDs that I need to read from another source. I basically need a way to get some subset of records fast, by record ID. 3) Traverse the data store and read every record. I don't need features to automatically expire the records. They are permanent. When reading (item 2) I have to create a perl data structure from the data, which doesn't change. So, I want to store this in my record, using Storable.pm. That can work with any data store, of course. It's not a complicated design. My choices are something like: 1) use Storable and write the files out myself. 2) use Cache::FileCache and have the work done (but can I traverse?) 3) use Berkeley DB (I understand the issues discussed in The Guide) So, what kind of questions and answers would help be weigh the options? With regard to locking, IIRC, Cache::Cache doesn't lock, rather writes go to a temp file, then there's an atomic rename. Last in wins. If updates to a record are not based on previous content (such as a counter file) is there any reason this is not a perfectly good method -- as opposed to flock? Again, I'm really looking more for discussion, not an answer to my specific needs. What issues would you use when selecting a data store method, and why? /verbose Thanks very much, Bill Moseley mailto:[EMAIL PROTECTED]
Re: Cache::* and MD5 collisions [was: [OT] Data store options]
At 10:54 AM 11/08/01 -0800, Andrew Ho wrote: For example, say your keys are e-mail addresses and you just want to use an MD5 hash to spread your data files over directories so that no one directory has too many files in it. Say your original key is [EMAIL PROTECTED] (hex encoded MD5 hash of this is RfbmPiuRLyPGGt3oHBagt). Instead of just storing the key in the file R/Rf/Rfb/Rfbm/RfbmPiuRLyPGGt3oHBagt.dat, store the key in the file [EMAIL PROTECTED] Presto... collisions are impossible. That has the nice side effect that I can run through the directory tree and get the key for every file. I do need a way to read every key in the store. Order is not important. Bill Moseley mailto:[EMAIL PROTECTED]
Re: [OT] search engine module?
At 02:04 PM 10/16/2001 +0100, Ged Haywood wrote: Plus lots of other stuff like Glimpse and Swish which interface to C-based engines. I've had good luck with http://swish-e.org/2.2/ Please make sure that it's possible to do a plain ordinary literal text string search. Nothing fancy, no case-folding, no automatic removal of puctuation, nothing like that. Just a literal string. Last night I tried to find perl -V on all the search engines mentioned on the mod_perl home page and they all failed in various interesting ways. I assume it's how the search engine is configured. Swish, for example, you can define what chars make up a word. Not sure what you mean by literal string. For performance reasons you can't just grep words (or parts of words), so you have to extract out words from the text during indexing. You might define that a dash is ok at the start of a word, but not at the end and to ignore trailing dots, so you could find -V and -V. (at the end of a sentence). Some search engines let you define a set of buzzwords that should be indexed as-is, but that's more helpful for technical writing instead of indexing code. Finally, in swish, if you put something like perl -V in quotes to use a phrase search it will find what you are looking for most likely, even if the dash is not indexed. Bill Moseley mailto:[EMAIL PROTECTED]
Re: Mod_perl component based architecture
I've been looking at OpenInteract, too. I've got a project where about 100 people need to edit records in a database via a web-based interface. And I'd like history tracking of changes (something like CVS provides, where it's easy to see diffs and to back out changes). And I need access control for the 100 people, along with tracking per user of how many changes they make, email notification of changes, administrative and super-user type of user levels, and bla, bla bla, and so on. Normal stuff. I'm just bored with html forms. Seems like I do this kind of project too often -- read a record, post, validate, update... Even with good templating and code reuse between projects I still feel like I spend a lot of time re-inventing the (my) wheel. Will an application framework bring me bliss? I'm sure this is common type of project for many people. What solutions have you found to make this easy and portable from project to project? Bill Moseley mailto:[EMAIL PROTECTED]
Re: [request] modperl mailing lists searchable archives wanted
Hi Stas, I just updated the search site for Apache.org with a newer version of swish. The context highlighting is a bit silly, but that can be fixed. I'm only caching the first 15K of text from each page for context highlighting. http://search.apache.org It seems reasonably fast (it's not running under mod_perl currently, but could -- if mod_perl was in that server ;). It takes about eight or nine minutes to reindex ~35,000 docs on *.apache.org so the mod_perl list (and others) shouldn't too much trouble, I'd think, with smaller numbers and smaller content. It doesn't do incremental indexing at this point, which is a draw back, but indexing is so fast it normally doesn't matter (and there's an easy work-around for something like a mailing list to pickup new messages as they come in during the day). Swish-e can also call a perl program which feeds docs to swish. That makes it easy to parse the email into fields for something like: http://swish-e.org/Discussion/search/swish.cgi which looks a lot like the Apache search site... But, what would be needed is a good threaded mail archiver, which there are many to pick from, I'd expect. Some archives are browsable, but their search engines simply suck. e.g. marc.theaimsgroup.com I think is the only one that archives [EMAIL PROTECTED], but if you try to seach for perl string like APR::Table::FETCH it won't find anything. If you search for get_dir_config it will split it into 'get', 'dir', 'config' and give you a zillion matches when you know that there are just a few. On swish you could say : and _ are part of words and those would index as full words. Or, just simply search for phrase: get_dir_config and it would search for the phrase get dir config which would probably find what you want. Maybe : and _ are ok in words, but you have to think carefully about others. It's more flexible to split the words and use phrases in many cases. Bill Moseley mailto:[EMAIL PROTECTED]
Phase for controlling network input?
I'm hoping this is possible with mod_perl, since I'm already familiar with it and fairly allergic to c, but can't seem to figure out the right phase. I've been seeing log files recently that point to a certain DDOS attack brewing on apache servers. I want to write a module that keeps a timer for the interval from when the apache child gets a network connection to when the client request has been sent. I need a trigger when a network connection is established and a trigger when apache thinks it has received the request (before the response). PerlChildInitHandler seems too early, since the child may be a pre-forked child without a connection. PerlPostReadRequest seems too late since I can't be guaranteed of being called if the request isn't complete, which is the problem I'm trying to solve. I could clear a flag in PerlPostReadRequest, but that would imply something is persisting from before that would be able to read the flag. Maybe I'm think about this all wrong. Any suggestions? Thanks, -Bill
