Re: [OT] ApacheCon BOF
Jonathan Gardner wrote: On Thu, 22 Mar 2001, Gunther Birznieks wrote: So apart from the Native American thread which I believe everyone has worked out... what do you want to do about T-Shirts? For me, three ideas stand out... 1) I did like the ModDonalds idea... What about this? (this would have to appear on the back or in small text on the front) If McDonalds used mod_perl... ... a burger that was referred to like a box of fries would turn into some strange numeric concoction that didn't make any sense, but was occasionally useful. ... the recipes would be available to the public. ... their menus would become enormous, available from a CMAN, and full of a mixture of completely bizarre experiments and staggeringly good food, all mixed up together. ... every time you bit into a burger, it would rebuild itself on-the-fly just in time for you to taste it. ... some wit would probably put hash cakes and oysters on the menu. ... if you weren't careful, ordering one thing would cause a bunch of other "pre-requisites" to also get ordered. Ultimately, you might find them refurbishing the whole building in response to your order. (But Trademark Difficulties(tm) probably take out this idea; there are better legal fights to be had). -- Tim Sweetman A L Digital "Life in a box is better than no life at all, I expect. You'd have a chance, at least. You could lie there thinking, 'Well. At least I'm not dead.'" --- Rosencrantz
Re: [OT] ApacheCon BOF
"Tim" == Tim Sweetman [EMAIL PROTECTED] writes: Tim (But Trademark Difficulties(tm) probably take out this idea; there are Tim better legal fights to be had). But in the US, we have safe harbor because of the 2 live crew supreme court case. This is a parody, remember!? Of course, you're own your own if you export the shirt to international waters... :) If you just stick with the original idea, there's not a helluva lot they can claim about TM dilution or confusion of services offered. I actually thought about both of those issues when I came up with the idea. That's why it was a serious idea. -- Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095 [EMAIL PROTECTED] URL:http://www.stonehenge.com/merlyn/ Perl/Unix/security consulting, Technical writing, Comedy, etc. etc. See PerlTraining.Stonehenge.com for onsite and open-enrollment Perl training!
RE: dbm locking info in the guide
Stas, Sounds like you agree with me that downgrading locks from exclusive to shared is not a problem with the method I described in the last e-mail. Now you have a concern with upgrading locks from shared to exclusive: David, please consider this scenario: ... At some point in time, processes A and B both read from the dbm via SH lock. 1. A completes its reading and unlocks the DBM, while still having the first 4k cached. (A still has the dbm tie()'d. 2. B wants to write, so it requests an EX lock and gets it granted. This will not happen. When B requests the EX lock it will block until all of the other shared locks have been released. Process A has to release the SH lock somehow for B to get the EX lock. Either A simply finishes and releases the lock, or A requests an upgrade, is denied, and handles this by releasing the lock. When the EX lock is granted (whether from an upgrade or not), by definition no other processes can have a SH lock and be reading the database. No other processes can have a first 4k cached because no other processes can have the file open. From the flock manpage: "A single file may not simultaneously have both shared and exclusive locks." 3. B modifies the data in the first 4k, syncs it and releases the lock. 4. A asks for SH or EX lock, gets it, but its cache is invalid. = we have a data corruption (especially in the case A does writing into the first 4k) David Harris President, DRH Internet Inc. [EMAIL PROTECTED] http://www.drh.net/ -Original Message- From: Stas Bekman [mailto:[EMAIL PROTECTED]] Sent: Thursday, March 22, 2001 10:22 PM To: David Harris Cc: mod_perl list Subject: RE: dbm locking info in the guide On Thu, 22 Mar 2001, David Harris wrote: Two points about switching from exclusive mode to shared mode: (1) When downgrading from EX to SH, no other processes need to have cached data invalidated because no one else can have the database open. There is no cache in other processes, therefore none to be invalidated. Explanation: Lets say the method for downgrading a lock from EX to SH is like this: write data, sync(), flock(FLOCK_SH), read data. Until the flock(FLOCK_SH) nobody else can have the database open because of the exclusive lock. Therefore, there will not be any other processes with the database open and the first 4k cached in memory when the sync() happens. David, please consider this scenario: ... At some point in time, processes A and B both read from the dbm via SH lock. 1. A completes its reading and unlocks the DBM, while still having the first 4k cached. (A still has the dbm tie()'d. 2. B wants to write, so it requests an EX lock and gets it granted. 3. B modifies the data in the first 4k, syncs it and releases the lock. 4. A asks for SH or EX lock, gets it, but its cache is invalid. = we have a data corruption (especially in the case A does writing into the first 4k) (2) When downgrading from EX to SH, our processes does not need to invalidate cached data because its cached data is correct at the sync() and the data on disk will not be changed until the database is closed. Explanation: Again we downgrade form EX to SH by doing this: write data, sync(), flock(FLOCK_SH), read data. Our cache remains valid the entire time here. With the sync(), data in our cache is written to disk, so at that point we are good. Then after the flock(FLOCK_SH) we are still good because the shared lock prevents anyone else from writing to the database and changing the data on disk. There is no need to do a re-tie(). That's correct. _ Stas Bekman JAm_pH -- Just Another mod_perl Hacker http://stason.org/ mod_perl Guide http://perl.apache.org/guide mailto:[EMAIL PROTECTED] http://apachetoday.com http://eXtropia.com/ http://singlesheaven.com http://perl.apache.org http://perlmonth.com/
RE: dbm locking info in the guide
On Fri, 23 Mar 2001, David Harris wrote: Stas, Sounds like you agree with me that downgrading locks from exclusive to shared is not a problem with the method I described in the last e-mail. That's correct. Now you have a concern with upgrading locks from shared to exclusive: David, please consider this scenario: ... At some point in time, processes A and B both read from the dbm via SH lock. 1. A completes its reading and unlocks the DBM, while still having the first 4k cached. (A still has the dbm tie()'d. 2. B wants to write, so it requests an EX lock and gets it granted. This will not happen. When B requests the EX lock it will block until all of the other shared locks have been released. Process A has to release the SH lock somehow for B to get the EX lock. Either A simply finishes and releases the lock, or A requests an upgrade, is denied, and handles this by releasing the lock. That's if you code it that way. Nothing prevents you from unlocking A, and then asking for some lock later. You always want to make the critical section as short as possible. So if you need to access the dbm file twice through the request. You may go through this scenario: A: flock SH B: flock SH A: flock UN B: flock EX B: flock SH A: flock SH 'A' still have the data cached and possibly invalid. Your proposed system is clean only in this case: You can never explicitly unlock dbm and then relock it without calling untie(). You can safely upgrade the lock from SH to EX and downgrade from EX to SH though, without using UN (sort of semi-atomically). When the EX lock is granted (whether from an upgrade or not), by definition no other processes can have a SH lock and be reading the database. No other processes can have a first 4k cached because no other processes can have the file open. They can, if there weren't untie()d per my above explanation. _ Stas Bekman JAm_pH -- Just Another mod_perl Hacker http://stason.org/ mod_perl Guide http://perl.apache.org/guide mailto:[EMAIL PROTECTED] http://apachetoday.com http://logilune.com/ http://singlesheaven.com http://perl.apache.org http://perlmonth.com/
(new idea) RE: [OT] ApacheCon BOF
theme How about a picture of a card game; on the table are a 9 of diamonds, Jack of Clubs, and King of spades. The dealer is about to play the Ace of perl. The caption reads, "mod_perl does the trick". Also in the dealer's hand are cards that say, IIS iPlanet Servertec Xitami ... /theme The cards on the table are arbitrary. Perhaps some clever individual can code a secret message into the card selection. I'm also not sure what the 'Ace of perl' should look like, but we all know what the 'A' stands for. You can also pick your favorite competition, for cards still in the dealer's hand.
Charset?
Is there a mod_perl way to set the character set besides doing:
$r-content_type('text/html; charset=foo');
???
That'd be handy for a future version. I can't find anything in the
Apache.pm docs (1.24) or the guide for this.
-dave
/*==
www.urth.org
We await the New Sun
==*/
Re: Getting MAC address
On Wed, 21 Mar 2001, John Whitnack wrote: Is there a way to get a person MAC address using apache, mod_perl or javascript. I have yet to find a way to do this? I need a way to uniquely identify the computer a person is using (i.e. not ip address). John Whitnack If I'm correct, MAC address is a means of identifying some communication devices sharing a commun physical link, like Ethernet. For instance, SLIP and PPP do not use any. They do not need to since they are used in peer to peer communication. So let's suppose your client is hooked on an Ethernet segment. According to TCP/IP operation (TCP/IP Illustrated by Stevens is a good reference), getting at the client PC MAC address would require your Apache server to have one NIC share the client Ethernet segment. In such a case, it would be possible to perform an ARP request, or scan the Apache server ARP cache with a command like (Linux) # /sbin/arp -a | grep 'clientIP''| cut -d' ' -f4 to fetch the MAC address. Otherwise, the best bet would be to have Javascript deliver it to your Apache server as a mere data. But I do not see in the Javascript specs any provision for doing that. Good luck Franck --- | A fashion rules each age, without most people | | being able to see the tyrants that rule them. | | [Albert Einstein]| ---
Problem with mod_perl 1.25 as a DSO with Apache 1.3.19 on Digital Unix 4.0F
I am trying to use mod_perl 1.25 with Apache 1.3.19 on Digital Unix version 4.0F. When I build the DSO and try to load it into Apache, I get: Syntax error on line 486 of /usr/local/www/apache/1.3.19/conf/httpd.conf: Cannot load /usr/local/www/apache/1.3.19/libexec/libperl.so into server: Unresolved symbol in /usr/local/www/apache/1.3.19/libexec/libperl.so: PL_tmps_ix This is with perl 5.6.0 (I tried first with 5.005_03). When building perl on Digital Unix, the default is to build libperl as a shared library instead of a static library. This is called libperl.so. I thought that mod_perl being libperl.so might be a problem, so I renamed it to libmodperl.so, but that didn't seem to help. It appears that Apache is not loaded the perl library when loading the mod_perl DSO for some reason. I would prefer to keep mod_perl as a DSO (I have several instances of Apache on this server, and I only want mod_perl available in one of them, and it makes upgrading MUCH easier if there is only one Apache binary). Any ideas? Anyone else using mod_perl as a DSO with libperl as a shared library? -- Chris Adams [EMAIL PROTECTED] Systems and Network Administrator - HiWAAY Internet Services I don't speak for anybody but myself - that's enough trouble.
using Apache:DBI
Hello everyone, I'm new to Apache mod_perl and this list. Please forgive me if the answer to this question has already been discussed. Using "PerlRequire startup.pl" to preload Apache::DBI, I get the following error from Apache: Had to create DBD::mysql::dr::imp_data_size unexpectedly at /usr/local/lib/perl5/site_perl/5.005/i386-freebsd/DBI.pm line 687. This started happening after the system administer rebooted our server running FreeBSD. Before that, everything worked fine. Any suggestions? __ Do You Yahoo!? Get email at your own domain with Yahoo! Mail. http://personal.mail.yahoo.com/
Apache::ASP - Server-CreateObject
I have a problem - I'm trying to convert my ASP code to Perl code for use
with Apache::ASP on Win98. Currently I make Server.CreateObject calls fra
within my asp page that generates an html page for me.
The code is as below:
%
Dim ASPLightningclogin
Set ASPLightningclogin = Server.CreateObject("WPRS303_CWP.clogin")
ASPLightningclogin.Execclogin
%
Is below conversion the correct for Perl?
%
my $ASPLightningclogin = $Server-CreateObject("WPRS303_CWP.clogin");
$ASPLightningclogin-Execclogin;
%
This only generates a blank html page in my browser?
The ".htm" examples from site/eg directory works fine, but all ".asp" files
does not execute. I get an "Internal Server Error". Any idea what's wrong?
By the way I'm not a member of any discussion board - how do I get that? Do
I have to check in the discussion groups every day for any responds to my
question or do I recieve an e-mail?
I hope you are able to help me:)
Best Regards,
Jakob Vedel
Re: Charset?
On Fri, 23 Mar 2001, Dave Rolsky wrote:
Is there a mod_perl way to set the character set besides doing:
$r-content_type('text/html; charset=foo');
???
No, that's the way you have to do it.
--
Matt/
/||** Founder and CTO ** ** http://axkit.com/ **
//||** AxKit.com Ltd ** ** XML Application Serving **
// ||** http://axkit.org ** ** XSLT, XPathScript, XSP **
// \\| // ** mod_perl news and resources: http://take23.org **
\\//
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Re: Apache::ASP - Server-CreateObject
Jakob Adeltoft wrote:
I have a problem - I'm trying to convert my ASP code to Perl code for use
with Apache::ASP on Win98. Currently I make Server.CreateObject calls fra
within my asp page that generates an html page for me.
The code is as below:
%
Dim ASPLightningclogin
Set ASPLightningclogin = Server.CreateObject("WPRS303_CWP.clogin")
ASPLightningclogin.Execclogin
%
Is below conversion the correct for Perl?
%
my $ASPLightningclogin = $Server-CreateObject("WPRS303_CWP.clogin");
$ASPLightningclogin-Execclogin;
%
This looks about right, but to get more help on that, you might
try asking at: [EMAIL PROTECTED]
This only generates a blank html page in my browser?
The ".htm" examples from site/eg directory works fine, but all ".asp" files
does not execute. I get an "Internal Server Error". Any idea what's wrong?
What's in your error_log for a bad request?
Make sure the .htaccess in site/eg has Debug set to -2 or -3.
By the way I'm not a member of any discussion board - how do I get that? Do
I have to check in the discussion groups every day for any responds to my
question or do I recieve an e-mail?
Check out: http://perl.apache.org/#maillists
To develop in Apache::ASP, its necessary to know how to develop
in mod_perl generally.
-- Josh
_
Joshua Chamas Chamas Enterprises Inc.
NodeWorks free web link monitoring Huntington Beach, CA USA
http://www.nodeworks.com1-714-625-4051
Chromium
Did anyone try the Chromium Apache-based web server? More specifically (and topically), does it work with mod_perl? http://www.chromium.com/ -- "I've run DOOM more in the last few days than I have the last few months. I just love debugging ;-)" -- Linus Torvalds
RE: dbm locking info in the guide
Perhaps we have a misunderstanding here. I would NEVER flock(UN) without having just previously untie()d the database. And I would ALWAYS acquire a lock immediately before tie()ing the database. That's the point. We have to write down all the assumptions or people will do the wrong thing. I'll try to summarize our discussion later. Thanks David! _ Stas Bekman JAm_pH -- Just Another mod_perl Hacker http://stason.org/ mod_perl Guide http://perl.apache.org/guide mailto:[EMAIL PROTECTED] http://apachetoday.com http://logilune.com/ http://singlesheaven.com http://perl.apache.org http://perlmonth.com/
