RE: mod_perl2: nmake test crashes apache
Greetings. [...] Apache builds and installs fine, mod_perl2 builds fine but running `nmake test` crashes the instance of apache2 created by the TEST script. [...] I have exactly the same behavior with May 6 snapshots (Visual Studio 6SP3, WinNT SP6) - quoting myself from a different thread: [RE: mod_perl failing on win32 (CVS snapshots)] [...] Yup. My 'nmake test' now segfaults at conftree.t, with an access violation somewhere in perl56.dll By running restricted test suites, I found out that the culprit appears to hide somewhere in compat2.t, i.e the sequence: perl -Mblib t\test t/apache/compat2.t t/apache/conftree.t wedges, whereas: perl -Mblib t\test t/apache/cgihandler.t t/apache/compat.t t/apache/conftree.t perl -Mblib t\test t/apache/cgihandler.t t/apache/conftree.t perl -Mblib t\test t/apache/compat.t t/apache/conftree.t are clean. (But note that for instance: perl -Mblib t\test t/apache/compat2.t t/apache/post.t also works. Combinatorial explosion, anyone?) [...] My test output is exactly the same as yours down to the memory addresses in the segfault dialog box. From hints in the above mentioned thread, looks like people running XP are experiencing fewer or different problems in the test suite. Cheers, alf
Re: mod_perl2: nmake test crashes apache
By running restricted test suites, I found out that the culprit appears to hide somewhere in compat2.t, i.e the sequence: perl -Mblib t\test t/apache/compat2.t t/apache/conftree.t wedges, whereas: perl -Mblib t\test t/apache/cgihandler.t t/apache/compat.t t/apache/conftree.t perl -Mblib t\test t/apache/cgihandler.t t/apache/conftree.t perl -Mblib t\test t/apache/compat.t t/apache/conftree.t are clean. (But note that for instance: perl -Mblib t\test t/apache/compat2.t t/apache/post.t also works. Combinatorial explosion, anyone?) [...] My test output is exactly the same as yours down to the memory addresses in the segfault dialog box. From hints in the above mentioned thread, looks like people running XP are experiencing fewer or different problems in the test suite. Hi about combinatorial I think not only compat2 is involved here in test suites I have ran on win2k (i have the same problem mentionned) with apache 2.035 or 2.036 modeperl.1.99-02-dev here is a resume of previous post with perl t/test dirtest : dirtest=api: api/access :ok api/aplog : apache segfault dirtest=apr apr/base34 :ok apr/constants : ok apr/date apache segfault dirtest=apache apache/cgihandler : ok apache/compat: ok apache/compat2:ok apache/conftree : apache segfault dirtest=directive directive/env failed 1-3, 4 ok directive/prelmodule : ok directive/perlrequire : ok directive/setupenv : apache segfault dirtest=filter all tests succesfull dirtest=hooks hooks/access : ok hooks/authen : ok 2/4 and 3 segfault dirtest=modperl modperl/dirconfig : failed tests 6-12 failed 7/12 tests (this reminds me my previous post about dir_config not working) and apache segfaults dirtest=protocol protocol/echo ok protocol/filter ok protocol/eliza skipped dirtest=module modules/cgi ok 2/5 and apache segfaults... - also running tests with perl t\test -start-httpd perl -Mblib t\test t/apache/conftree.t perl -Mblib t\test t/apache/compat2.t segfaults at compat2 perl t\test -start-httpd perl -Mblib t\test t/apache/conftree.t perl -Mblib t\test t/apache/compat.t segfaults at compat perl t\test -start-httpd perl -Mblib t\test t/apache/write.t perl -Mblib t\test t/apache/compat.t perl -Mblib t\test t/apache/compat2.t perl -Mblib t\test t/apache/conftree.t segfault at conftree perl t\test -start-httpd perl -Mblib t\test t/apache/compat.t perl -Mblib t\test t/apache/conftree.t perl -Mblib t\test t/apache/compat2.t segfault at compat2 perl t\test -start-httpd perl -Mblib t\test t/apache/compat2.t perl -Mblib t\test t/apache/conftree.t segfault at conftree --- also all test run individually perl t/test some_test_alone pass EXCEPT : modules/cgi produces apache segfault modperl/dir_config fails with message : error examine t\logs\error_log, which log says the well known error with dir_config : [Mon May 06 21:38:18 2002] [error] [client 62.147.163.25] Attempt to free unreferenced scalar at C:\modperl-2.0\t\response/TestModperl/dir_config.pm line 71. best regards pascal
Re: [RFC] Dynamic image generator handler
On Wed, 8 May 2002, Michael A Nachbaur wrote: With regard to dynamic image creation The most basic uses of this application will to dynamically generate TTF text for titles, buttons, sidebars, etc. The current version of this code does this, and quite well. Foreground and background colors, font name (with bold/italic support), font size, image size (or automatically detected based on the size of the text), and rotation. I've been working on something like this using GD. Mainly I've been thinking about the interface which (as always) seems to the hardest thing to do properly. It's not an Apache module (though it is designed with mod_perl in mind.) Some form of wrapping module would have to go around it. Hmm. How about I upload the POD so you can see what I mean. htpp://2shortplanks.com/temp/gdti/ Note that this is a work in progress. This code doesn't work yet (though previous hacky versions did.) Yours sounds much more advanced. The basic text support could be extended to allow for images to be overlayed on the text (or placed under the text), or stretch images similarly to how Enlightenment displays window manager themes. Hmm, yes. I have it so the image can be aligned in various ways. It's not quite up to stretching it yet, but we shall see. Other uses planned would be to manipulate existing images. For instance, if an image on a website needs a thumbnail, medium size and full-size view, normally a person must make all versions by hand. If any formatting needs to be done, like borders or drop-shadows, this increases complexity. If a person could just drop an image in a directory, and link to that image, the image could automatically be resized, borders added, drop shadows put in place. The resulting image would then be cached, and outputted. Hmm, getting a little complicated here. My program outputs a GD::Image object when done. The idea is that you can then use GD to implement any of the things you're missing. Also, the stages where it draws the background, the border, the text, and so on are all different methods. This allows you to override these methods with your own ones in subclasses, so you can intercept the image creation at various stages and step in to do things first (e.g. draw to the background before the bg image is drawn) *) URI Arguments Information about what is to be done is passed through the URI. This works for simple tasks like text display, but if anything more complicated is to be done, external configuration files must be used. We'll get to that in a bit. I was working on several different encoding schemes that you could use on the URL. Primarily these were: * Base64 alike encoding * A scheme where was replaced with _ and entities could be used Primely I'm only concerned about the text that you want rendered. Everything else was going to be read from a config file/set in the httpd.conf. I was also planning to implement Template Toolkit plugins to allow you to easily create these images. Essentially, arguments are passed using the PATH_INFO HTTP header. We want the browser to think this is an actual file, instead of a dynamically generated image, so that the browser is more inclined to cache the content. So, a typical query would be: http://localhost/genText/font=ArialBold;size=24;fgcolor=#ff; bgcolor=#00;rotate=90;text=This+Is+The+Text This is indeed a key concept. More importantly I designed my schemes so that they could actually be saved to disk with that filename. One possible idea would be to place the image creation in an ErrorHandler which returns the image and writes it to the correct location on disk. Thus the next time the image is called the perl code is skipped all together and the image is simply sucked off of the disk. I think Randal did a column on something like this a while back. *) Configuration Files I was thinking of using a system accessible in the httpd.conf for the apache module. The real important part here, is the name attribute of any element, as this identifies where input can be indicated. In my scheme each location was a different font. So: http://twoshortplanks.com/f/xmason/1st.jpg Is the image 1st in the xmason style. (yes, that link works) An important aspect is that styles in my system can be created from other styles using the -clone() method. So for example, to create heading2 you could use: my $heading2 = $heading1-clone(text_size = ($heading1-text_size() * 0.8)); All the other attributes would stay the same (colour, background image etc, etc.) The configuration file should reflect that. *) Caching Schemes I hadn't really considered caching systems. Sounds good. Note: To prevent the filesystem from filling up, due to DoS attacks, it may be prudent to have a cron job periodically cull files that have the oldest access time. Or have the handler do it itself after it's returned an image. You'd also want the handler
RE: mod_perl2: nmake test crashes apache
Greetings, [...] Hi about combinatorial I think not only compat2 is involved here in test suites I have ran [...] Wow. this is great detective work you have done Pascal. I have tried to go deeper and actually debug the thing. However, while I can get a debug version of apache I am stumped on a few counts: o) mod_perl does not compile with MP_DEBUG=1 (complains about an undefined _MP_debug_level) - and I doubt it is doing THE RIGHT THING anyways, because it adds a truely gcc-ish '-g' flag to the command line... o) mod_perl does not build against 5.007003 bleadperl (I wanted to test whether bleadperl had the same problem) o) the crash erases the call stack so all I can do is staring at mov edi,dword ptr [esi] Not very useful. And for the Curioser and curioser! department: I happened to run the test suite with a shell anvironment containing DEBUG=0 and TRACE=0 (ask not why...). Under these circumstances the test suite spins endlessly on conftree.t (rather than crashing). Folklore, perhaps, and hardly an improvement, but I am wondering who is checking those two variables? If I remove them from my environment, I get my old friend the crash back. Cheers, alf
Re: mod_perl2: nmake test crashes apache
Alessandro Forghieri wrote: about combinatorial I think not only compat2 is involved here in test suites I have ran Wow. this is great detective work you have done Pascal. Actually you didn't have to do the detective work. Apache::Test comes with a detective of its own. Just run t/SMOKE and it'll find all the combinations that fail. Though I cannot help you on WinFU :( Hopefully Randy or Doug will hear you. __ 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
Re: [RFC] Dynamic image generator handler
Michael == Michael A Nachbaur [EMAIL PROTECTED] writes: Michael This is a mod_perl handler, not directly tied in with my Michael content management system, but is/will be used extensively by Michael it. The premise is to dynamically generate images, cache Michael them, and present them to browser clients. The URI, as well Michael as Apache configuration directives, is used to determine what Michael is to be generated. Like http://www.stonehenge.com/merlyn/LinuxMag/col33.html perhaps? Been there, Done that. Feel free to steal the code. -- 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: mod_perl2: nmake test crashes apache
On Fri, 10 May 2002, Stas Bekman wrote: Alessandro Forghieri wrote: about combinatorial I think not only compat2 is involved here in test suites I have ran Wow. this is great detective work you have done Pascal. Actually you didn't have to do the detective work. Apache::Test comes with a detective of its own. Just run t/SMOKE and it'll find all the combinations that fail. Though I cannot help you on WinFU :( Hopefully Randy or Doug will hear you. I haven't been able to come up with much more either ... Running individual tests as, eg, perl -Mblib t/TEST t/apache/post.t shows most pass (some, like dir_config.t, partially fail, but the error log, or running in verbose mode, shows why). However, when running groups of tests, like nmake test or perl -Mblib t/TEST t/apache things hang, or crash, after about the 2nd or 3rd test in the group. It's hard to see which particular one's at fault, though, as running the tests randomly: perl -Mblib t/TEST t/apache -order=random still hangs after about the 2nd or 3rd test, whichever one that happens to be. Running in verbose mode shows that, when a test hangs, it doesn't even get to the 1st subtest. I tried running the tests by, rather than using Win32::Process, having Apache-Test install and start a service, but there was no difference in the results. As well, this seems to be a problem particular to the mod_perl tests, as such behaviour doesn't arise with the httpd-test suite in testing pure httpd-2. However, in some limited random manual testing, I haven't seen an analogous problem outside of the Apache-Test framework - does anyone have such an example? best regards, randy
RE: [modperl2] Note on the win32 docs
On Wed, 8 May 2002, Alessandro Forghieri wrote: The script that follows *DOES* in fact send a header (so my previous msg. is partly wrong; I am used to read/write print $q-header(-content_type=text/html) rather than simply print header, but then I am rather long winded. OTOH the script coming *before* the section does not send the content-type header). I still think that PerlSendheader On is needed in the conf: when I omit it, I see an extra content-type header in the page content itself, that disappears after I insert the above directive. You're right - PerlSendHeader On should be there ... I'll modify the draft accordingly. Thanks. best regards, randy
Problems with mod_perl installation(HELP!!!)
People : I had spent more than 2 months trying to make mode_perl on my RH 72. First I tried with the RPMSbut it didn't works. Then I tryied with the tar.gz and I can't neither. It prompts the following compilation error:util.c: In function `ap_find_token': util.c:1410: `test_char_table' undeclared (first use in this function) util.c:1410: (Each undeclared identifier is reported only once util.c:1410: for each function it appears in.) util.c:1410: `T_HTTP_TOKEN_STOP' undeclared (first use in this function) util.c: In function `ap_escape_shell_cmd': util.c:1469: `test_char_table' undeclared (first use in this function) util.c:1469: `T_ESCAPE_SHELL_CMD' undeclared (first use in this function) util.c: In function `ap_escape_path_segment': util.c:1596: `test_char_table' undeclared (first use in this function) util.c:1596: `T_ESCAPE_PATH_SEGMENT' undeclared (first use in this function) util.c: In function `ap_os_escape_path': util.c:1625: `test_char_table' undeclared (first use in this function) util.c:1625: `T_OS_ESCAPE_PATH' undeclared (first use in this function) make[4]: *** [util.o] Error 1 and some times it says that can't open the shared file libperl.so -- Jose R. Ortiz Ubarri Cs. Student Programmer
Re: [RFC] Dynamic image generator handler
On Fri, 10 May 2002 08:32:55 +0200 Robert [EMAIL PROTECTED] wrote: Take a look at Apache::ImageMagick In my benchmarks I ran, ImageMagick was way slower than GD. I wrote a little test, rendering a little text image of 120x30. With ImageMagick, I was getting 0.3 rps, and under GD with similar circumstances I was getting 1.5rps. I'm sure I could've optimized the ImageMagick one a bit further, but that quick test settled it for me. I looked at Apache::ImageMagick last night however, and although it seems pretty usefull, it doesn't really address what I want to do with my module. -- -man Michael A Nachbaur PGP Public Key at http://www.nachbaur.com/pgpkey.asc PGP Key fingerprint = 83DC 7C3A 3084 6A21 9A3F 801E D974 AFB4 BFD7 2B6F
RE: [modperl2] Note on the win32 docs
On Fri, 10 May 2002, Randy Kobes wrote: You're right - PerlSendHeader On should be there ... I'll modify the draft accordingly. Thanks. actually, the 2.0 config is: PerlOptions +ParseHeaders PerlSendHeader On is just alias of that for backwards compat.
Re: [RFC] Dynamic image generator handler
On Fri, 10 May 2002 10:52:31 +0100 (BST) Mark Fowler [EMAIL PROTECTED] wrote: The basic text support could be extended to allow for images to be overlayed on the text (or placed under the text), or stretch images similarly to how Enlightenment displays window manager themes. Hmm, yes. I have it so the image can be aligned in various ways. It's not quite up to stretching it yet, but we shall see. I'm not either, all my module supports currently is text. Essentially, arguments are passed using the PATH_INFO HTTP header. We want the browser to think this is an actual file, instead of a dynamically generated image, so that the browser is more inclined to cache the content. So, a typical query would be: http://localhost/genText/font=ArialBold;size=24;fgcolor=#ff; bgcolor=#00;rotate=90;text=This+Is+The+Text This is indeed a key concept. More importantly I designed my schemes so that they could actually be saved to disk with that filename. One possible idea would be to place the image creation in an ErrorHandler which returns the image and writes it to the correct location on disk. Thus the next time the image is called the perl code is skipped all together and the image is simply sucked off of the disk. I think Randal did a column on something like this a while back. Yes, like I say in my caching section, I sort the arguments and then MD5 them, and thats the name of the file on disk. So /tmp/Imagecache/0/1/A/098FAD9 etc. I actually do this process in the URI Transformation phase. I intercept a request, check to see if the given arguments already has a cache entry on disk, and if so, I change $r-filename() to that location on disk. Otherwise, I generate it, and again point to that filename...I then let Apache serve the file. *) Configuration Files I was thinking of using a system accessible in the httpd.conf for the apache module. I want to stay away from httpd.conf-based config files. Although great for most things, the configuration of different image styles can be very site-specific, so I wouldn't want to have to reboot every time someone makes a change. In addition to this, I would like image styles to be editable through my Content Management System; if it's based in the httpd.conf (or even an .htaccess file), that means I'm giving a customer access to the control of the webserver, and that makes the hair stand up on the back of my neck. Rather, I could define an XML configuration file, and use a directive in the httpd.conf (or .htaccess) to point to the relevant configuration file for that site/location. *) Caching Schemes I hadn't really considered caching systems. Sounds good. Note: To prevent the filesystem from filling up, due to DoS attacks, it may be prudent to have a cron job periodically cull files that have the oldest access time. Or have the handler do it itself after it's returned an image. You'd also want the handler to keep a scoreboard of how many images have been generated in the last x minutes to stop generating for things like runaway spiders (though OTOH, this could probably be better handled by another module somewhere else in the chain) I'm trying to keep from tying up the httpd processes unnecessarily. I just want to generate an image, and then pass it off to apache as fast as possible. If I have to disk scan (or even maintain a scoreboard in memory), I'm not sure how that would affect performance. It might not be a bad idea to add a scoreboard, but I don't want it to have to do too much. Looking forward, I would like to be able to use this for more than just text. I'd like my customers to be able to select an image, set the maximum size, check a few boxes or radio buttons to say what formatting options they'd like, and the image is automagically resized without wasting disk space or taking a long time to download. Disk space cheap, CPU cycles expensive. Disk space cheap, CPU cycles expensive, web developer time *really* expensive. So, auto-generate, and load from disk cache. I'm sure there are plenty of other uses for this, but I'll leave it at this. I'm warey of creating a all too powerful module. It's taken me an age to come up with an interface that I think (IMHO) that has a sensible user interface. I wouldn't want to create something too powerful. Unfortunately for me, I need to add these fancy-dancy features. The reason I'm coming back to this module of mine is because I need to have background images behind text, semi-transparency of multi-layered images, and resizing/scaling of images with borders and shadows, etc. -- -man Michael A Nachbaur PGP Public Key at http://www.nachbaur.com/pgpkey.asc PGP Key fingerprint = 83DC 7C3A 3084 6A21 9A3F 801E D974 AFB4 BFD7 2B6F
Re: mod_perl2: nmake test crashes apache
the issue with all segfaults on win32 is related to the use of the internal perl variable PL_sv_no. not sure what the real problem is, but avoiding use of PL_sv_no has cured all segfaults on win32. the fixes have been checked into cvs. there are still a few tests that fail, but none that trigger a segfault.
Re: Problems with mod_perl installation(HELP!!!)
[Please make sure to reply back to the list! Thanks] Jose Ortiz wrote: People : I had spent more than 2 months trying to make mode_perl on my RH 72. First I tried with the RPMS but it didn't works. Then I tryied with the tar.gz and I can't neither. very unlikely that it doesn't work, try following the steps as explained in the guide: perl.apache.org/guide/install.html make sure that you get the latest apache-1.3.24 and mod_perl_1.24 when reporting bugs/problems, please follow the instructions here: http://perl.apache.org/preview/modperl-docs/dst_html/docs/1.0/guide/help.html#How_to_Report_Problems __ 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
PerlVINC and Can't locate Foo.pm in @INC ...
Banging my head against the wall a bit, 'cause this is just so simple, but still not working: Versions: Apache 1.3.22, mod_perl 1.26, perl 5.6.1 relevant lines from httpd.conf: PerlWarn On PerlModule Apache::PerlVINC Location /dat-ajm6q SetHandler perl-script PerlHandler DAT::Client::WWW PerlINC /home/ajm6q/cvs/dat-head/lib PerlFixupHandlerApache::PerlVINC PerlVersion DAT/Client/WWW.pm /Location Error log when access is attempted (other standard directories edited out for brevity): [Fri May 10 13:39:39 2002] [error] Can't locate DAT/Client/WWW.pm in INC (INC contains: /home/ajm6q/cvs/dat-head/lib [... edited out ...]) at /usr/lib/perl5/site_perl/5.6.1/i386-linux/Apache/PerlVINC.pm line 55. The file is, of course, actually there: % ls -l /home/ajm6q/cvs/dat-head/lib/DAT/Client/WWW.pm -rwxrwxr-x1 ajm6qwebwork 394 May 10 12:40 /home/ajm6q/cvs/dat-head/lib/DAT/Client/WWW.pm What am I missing? thanks for any help, -Aaron
Re: Problems with mod_perl installation(HELP!!!)
Stas Bekman wrote: [Please make sure to reply back to the list! Thanks] Jose Ortiz wrote: People : I had spent more than 2 months trying to make mode_perl on my RH 72. First I tried with the RPMS but it didn't works. Then I tryied with the tar.gz and I can't neither. very unlikely that it doesn't work, try following the steps as explained in the guide: perl.apache.org/guide/install.html there's also recipe 1.4 from the cookbook, which details a unix install from source (in addition to various binary installations): http://www.modperlcookbook.org/chapters/ch01.pdf we geeks tend to forget how frustrating a process it is doing this for the first time :) my first install was on RedHat 5.2 and it was a pain - I was missing so many libraries and dependencies that I had to reinstall RedHat to satisfy all the RPM crud. keep in mind that you typically need the 'developer' libraries (the ones that contain the header and other source files, as opposed to just the binaries) for redhat in order to compile stuff from source - glibc-devel in particular comes to mind. make sure that you get the latest apache-1.3.24 and mod_perl_1.24 also, start by making sure you can get Apache to compile by itself before moving to a mod_perl-enabled Apache. all this seems a bit daunting, dave harris and I wrote this part of the guide: http://perl.apache.org/guide/install.html#using_RPM_and_other_packages_to_ which explains how to go about using mod_perl from an RPM. it's rather dated now, but the basic steps are still the same. when reporting bugs/problems, please follow the instructions here: http://perl.apache.org/preview/modperl-docs/dst_html/docs/1.0/guide/help.html#How_to_Report_Problems yes, good advice :) good luck, and don't give up... --Geoff
Re: [RFC] Dynamic image generator handler
On Fri, May 10, 2002 at 10:46:11AM -0700, Michael A Nachbaur wrote: On Fri, 10 May 2002 08:32:55 +0200 Robert [EMAIL PROTECTED] wrote: Take a look at Apache::ImageMagick In my benchmarks I ran, ImageMagick was way slower than GD. I wrote a little test, rendering a little text image of 120x30. With ImageMagick, I was getting 0.3 rps, and under GD with similar circumstances I was getting 1.5rps. I'm sure I could've optimized the ImageMagick one a bit further, but that quick test settled it for me. I looked at Apache::ImageMagick last night however, and although it seems pretty usefull, it doesn't really address what I want to do with my module. I'm using Imlib2 w/ the c interface (http://freshmeat.net/projects/imlib2perl/) I needed antialias lines, alpha's etc. I modified my app to use a 'dbi' like interface for potentially any media driver. The diferent 'media drivers', gd, imlib2, *pdf/*tex etc all have different ideas how to draw a line, circle, polygon, text, add colors etc. Now all I have to do to use diffent libraries such as Media-new(Driver = 'imlib2'), or Media-new(Driver = 'gd'), Media-new(Driver = 'svg'), Media-new(Driver = 'pdflib') etc. There are may libraries out there, gd, imlib, imlib2, libart, povray, gdk, flash, pdfAPI2, pdflib, tex, latex, svg, imager, imagemagic, ... There are may good reasons to be able to 'just drop in' a driver ... just look at why the unified interface 'DBI' was developed for RDBM's . Ed
Re: [RFC] Dynamic image generator handler
On Wed, May 08, 2002 at 01:42:42AM -0700, Michael A Nachbaur wrote: This is an request for comments. If you don't care about dynamic image generation with mod_perl, or don't care about offering or reading about suggestions, you can safely ignore this. Also, be forewarned, this was written in StarOffice, and then copied/pasted into my email program, and hand tweaked, so some things may not have made the transition properly. Dynamic Image Manipulator - *) Overview This is a mod_perl handler, not directly tied in with my content management system, but is/will be used extensively by it. The premise is to dynamically generate images, cache them, and present them to browser clients. The URI, as well as Apache configuration directives, is used to determine what is to be generated. *) Basic Uses The most basic uses of this application will to dynamically generate TTF text for titles, buttons, sidebars, etc. The current version of this code does this, and quite well. Foreground and background colors, font name (with bold/italic support), font size, image size (or automatically detected based on the size of the text), and rotation. The basic text support could be extended to allow for images to be overlayed on the text (or placed under the text), or stretch images similarly to how Enlightenment displays window manager themes. Other uses planned would be to manipulate existing images. For instance, if an image on a website needs a thumbnail, medium size and full-size view, normally a person must make all versions by hand. If any formatting needs to be done, like borders or drop-shadows, this increases complexity. If a person could just drop an image in a directory, and link to that image, the image could automatically be resized, borders added, drop shadows put in place. The resulting image would then be cached, and outputted. *) URI Arguments Information about what is to be done is passed through the URI. This works for simple tasks like text display, but if anything more complicated is to be done, external configuration files must be used. We'll get to that in a bit. Essentially, arguments are passed using the PATH_INFO HTTP header. We want the browser to think this is an actual file, instead of a dynamically generated image, so that the browser is more inclined to cache the content. So, a typical query would be: http://localhost/genText/font=ArialBold;size=24;fgcolor=#ff; bgcolor=#00;rotate=90;text=This+Is+The+Text Resizing an image could be accomplished by doing: http://localhost/genImage/source=/images/ducks.jpg;scale-ratio=1:1; width=120;height=80;border-size:1px;border-color:#00; shadow-color:#00;shadow-angle:270;shadow-distance:5px This would resize an image to the indicated width/height. The scale-ratio argument would limit the width/height ratio, so the maximum dimension would be used. The other attributes are obvious. *) Configuration Files Lets assume that we are going to scale an image, add borders to it which consist of other images, and add text captions over the image. This would result in such a long URI, that browsers would probably truncate it. In addition, providing direct access to the browser opens up possibilities for DoS attacks. Therefore, a configuration file should be used. The config file must be flexible enough to allow a web page to provide various input, but have certain defaults set, and restricted. The proposed solution would be to have a config file that has preset default templates that the input arguments augment. For instance: genimage preset name=thumbnail-image image style border-style: solid; border-color: #00; border-width: 1px; shadow-distance: 5px; shadow-angle: 270; !-- or something like 1.2rad -- shadow-color: #00; /style content name=src/ /image image style href=/css/watermark.css/ !-- The above-referenced file has the following contents: opacity: 80%; position: top; -- content/images/watermark.gif/content /image text style font-face: Arial; font-size: 10px; color: #00; border-style: solid; border-color: #ff; opacity: 80%; text-align: right; /style contentCopyright copy; 2002 Foo Bar Industries/content /text text style font-face: Arial; font-size: 14px; color: #ff; text-align: left; position: top; /style content name=date/ /text /preset /genimage As you can see, the above configuration file uses CSS. It makes sense to leverage that, although I'm not certain how difficult it would be to interface with CSS files. As far as I know, there are Perl CSS parsers, but I have yet to use them. The
Re: [RFC] Dynamic image generator handler
On 10 May 2002 06:39:47 -0700 [EMAIL PROTECTED] (Randal L. Schwartz) wrote: Like http://www.stonehenge.com/merlyn/LinuxMag/col33.html perhaps? Been there, Done that. Feel free to steal the code. Like that, but a bit more so. And I'd like to avoid ImageMagick like the plague. -- -man Michael A Nachbaur PGP Public Key at http://www.nachbaur.com/pgpkey.asc PGP Key fingerprint = 83DC 7C3A 3084 6A21 9A3F 801E D974 AFB4 BFD7 2B6F
how to see /server-status when at MaxClients?
if a job hangs (due to database locking for instance), then a mod_perl child will hang as well (absent some additional watchdog-type program.) if enough jobs hang to the point that we hit MaxClients, then it is too late to use /server-status to see what jobs hung. does anyone have a quick way to indentify the jobs that are currently running? i thought of getting a core and using gdb but i was hoping to find a faster way. it would be nice if we could reserve a couple of children for administrative emergencies such as this. thanks, jlg John Leon Guerrero -- http://www.live365.com
Re: mod_perl 1.26 build under Cygwin fails
At 21:43 01.05.2002, Alexander Solovey wrote: Per Einar Ellefsen wrote: Try to apply patch (attached) and then build using these options: perl Makefile.PL APACHE_SRC=../apache_1.3.24/src USE_APACI=1 EVERYTHING=1 PERL_EXTRA_CFLAGS=-DUSEIMPORTLIB DO_HTTPD=1 APACI_ARGS='--enable-rule=SHARED_CORE --enable-module=so' Thanks a lot for that patch, atleast it fixed the initial problem. However, when mod_perl.config.sh is called, it reports Note (probably harmless): No library found for -lperl. Well, it is harmful :) I get tons of linking errors at compilation time (undefined references). How do I get it to find the perl library, if any? Or, how do I compile one if I have to? Oh, I forgot to tell you that one more step is required: cd /lib/perl5/5.6.1/cygwin-multi/CORE ln -s libperl5_6_1.a libperl.a mod_perl requires libperl.a to be present but cygwin doesn't provide it by default. So, here is a symbolic link and it works. Thanks a lot for your help. Now, for some more problems :) === src/modules gcc -c -I./os/cygwin -I./include -DCYGWIN -DMOD_PERL -DUSE_HSREGEX -DSHARED_CORE -DUSEIMPORTLIB -DPERL_USE_SAFE_PUTENV -fno-strict-aliasing -I/usr/local/include `./apaci` modules.c gcc -c -I./os/cygwin -I./include -DCYGWIN -DMOD_PERL -DUSE_HSREGEX -DSHARED_CORE -DUSEIMPORTLIB -DPERL_USE_SAFE_PUTENV -fno-strict-aliasing -I/usr/local/include `./apaci` buildmark.c dllwrap --export-all -o libhttpd.dll buildmark.o modules.o modules/standard/libstandard.a modules/perl/libperl.a main/libmain.a ./os/cygwin/libos.a ap/libap.a regex/libregex.a -lcrypt -lgdbm -s -s -L/usr/local/lib /usr/lib/perl5/5.6.1/cygwin-multi/auto/DynaLoader/DynaLoader.a -L/usr/lib/perl5/5.6.1/cygwin-multi/CORE -lperl -lcrypt dllwrap: no export definition file provided dllwrap: creating one, but that may not be what you want gcc -I./os/cygwin -I./include -DCYGWIN -DMOD_PERL -DUSE_HSREGEX -DSHARED_CORE -DUSEIMPORTLIB -DPERL_USE_SAFE_PUTENV -fno-strict-aliasing -I/usr/local/include `./apaci`\ -o libhttpd.ep -DSHARED_CORE_TIESTATIC main/http_main.c \ -L. -lhttpd -lcrypt -lgdbm -s -s -L/usr/local/lib /usr/lib/perl5/5.6.1/cygwin-multi/auto/DynaLoader/DynaLoader.a -L/usr/lib/perl5/5.6.1/cygwin-multi/CORE -lperl -lcrypt gcc -I./os/cygwin -I./include -DCYGWIN -DMOD_PERL -DUSE_HSREGEX -DSHARED_CORE -DUSEIMPORTLIB -DPERL_USE_SAFE_PUTENV -fno-strict-aliasing -I/usr/local/include `./apaci`\ -o httpd -DSHARED_CORE_BOOTSTRAP main/http_main.c \ ap/libap.a -lcrypt -lgdbm -s -s -L/usr/local/lib /usr/lib/perl5/5.6.1/cygwin-multi/auto/DynaLoader/DynaLoader.a -L/usr/lib/perl5/5.6.1/cygwin-multi/CORE -lperl -lcrypt libhttpd.dll make[3]: Leaving directory `/usr/src/apache_1.3.24/src' I'm not so sure what's happening, but re-running make will re-execute this section over and over again, so something must have gone wrong :( I tried playing around a little with options to dllwrap, but without much luck. -- Per Einar Ellefsen [EMAIL PROTECTED]
Re: mod_perl2: nmake test crashes apache
* Doug MacEachern wrote: the issue with all segfaults on win32 is related to the use of the internal perl variable PL_sv_no. not sure what the real problem is, but avoiding use of PL_sv_no has cured all segfaults on win32. the fixes have been checked into cvs. I now get apache\cgihandler...ok apache\compat...ok apache\compat2..ok apache\conftree.ok apache\constantsok apache\post.ok apache\read.ok apache\scanhdrs.ok apache\subprocess...skipped: perl 5.7.3 apache\writeok api\access..ok api\aplog...ok api\conn_recok api\lookup_uri..ok api\lookup_uri2.ok api\module..FAILED test 2 Failed 1/13 tests, 92.31% okay api\r_subclass..ok api\request_rec.ok api\responseok api\rutil...ok api\send_fd.ok api\sendfileok api\server_rec..ok api\server_util.ok api\uri.ok apr\base64..ok apr\constants...ok apr\dateok apr\netlib..FAILED test 3 Failed 1/3 tests, 66.67% okay apr\perlio..skipped: iolayers is not available with this version of Perl apr\poolok apr\string..ok apr\table...ok apr\utilok apr\uuidok directive\env...FAILED tests 1-3 Failed 3/4 tests, 25.00% okay directive\perlmodule.ok directive\perlrequire.ok directive\setupenv..ok filter\api..ok filter\buckets..ok filter\input_body...ok filter\input_msgok filter\lc...ok filter\reverse..ok hooks\accessok hooks\authenok hooks\authz.ok hooks\fixup.ok hooks\headerparser..ok hooks\init..ok hooks\trans.ok modperl\dir_config..FAILED tests 6-12 Failed 7/12 tests, 41.67% okay modperl\endav...ok modperl\env.ok modperl\exitok modperl\getcFAILED test 2 Failed 1/2 tests, 50.00% okay modperl\pnotes..ok modperl\print...ok modperl\printf..ok modperl\readlineok modperl\sameinterp..ok modules\cgi.ok modules\cgiupload...ok modules\include.ok protocol\echo...ok protocol\echo_filter.ok protocol\eliza..skipped: cannot find module 'Chatbot::Eliza' Failed Test Status Wstat Total Fail Failed List of Failed api\module.t 131 7.69% 2 apr\netlib.t 31 33.33% 3 directive\env.t43 75.00% 1-3 modperl\dir_config.t 127 58.33% 6-12 modperl\getc.t 21 50.00% 2 3 tests skipped. !!! : error running tests (please examine C:t\logs\error_log) NMAKE : fatal error U1077: 'C:\Perl\bin\perl.exe' : return code '0x1' Stop. Where error_log is [Sat May 11 03:14:49 2002] [info] 12 Apache:: modules loaded [Sat May 11 03:14:49 2002] [info] 5 APR:: modules loaded [Sat May 11 03:14:49 2002] [info] base server + 6 vhosts ready to run tests [Sat May 11 03:14:49 2002] [info] 11 Apache:: modules loaded [Sat May 11 03:14:49 2002] [info] 5 APR:: modules loaded [Sat May 11 03:14:49 2002] [info] base server + 6 vhosts ready to run tests [Sat May 11 03:14:50 2002] [notice] Child 2552: Child process is running [Sat May 11 03:14:50 2002] [notice] Child 2552: Acquired the start mutex. [Sat May 11 03:14:50 2002] [notice] Child 2552: Starting 10 worker threads. [Sat May 11 03:15:02 2002] [info] [client 192.168.0.128] TestAPI::aplog test in progress [Sat May 11 03:15:02 2002] [debug] C:\b\modperl-2.0\t\response/TestAPI/aplog.pm(43): log_serror test ok [Sat May 11 03:15:02 2002] [debug] C:\b\modperl-2.0\t\response/TestAPI/aplog.pm(46): (20007)No time was provided and one was required.: log_serror test 2 ok [Sat May 11 03:15:03 2002] [debug] C:\b\modperl-2.0\t\response/TestAPI/aplog.pm(49): [client 192.168.0.128] log_rerror test ok [Sat May 11 03:15:03 2002] [error] $r-log_error test ok [Sat May 11 03:15:03 2002] [error] $s-log_error test ok [Sat May 11 03:15:03 2002] [debug] C:\b\modperl-2.0\t\response/TestAPI/aplog.pm(63): TestAPI::aplog test done [Sat May 11 03:15:33 2002] [error] [client 192.168.0.128] File does not exist: C:/b/modperl-2.0/t/htdocs/nope [Sat May 11 03:15:34 2002] [error] [client 192.168.0.128] Attempt to free unreferenced scalar at C:\b\modperl-2.0\t\response/TestModperl/dir_config.pm line 71. [Sat May 11 03:15:37 2002] [error] [client 192.168.0.128] Attempt to free unreferenced scalar at C:\b\modperl-2.0\t\response/TestModperl/getc.pm line 23. there are still a few tests that fail, but none that trigger a segfault. Exactly. Thanks.
Re: PerlVINC and Can't locate Foo.pm in @INC ...
Aaron J Mackey wrote: Banging my head against the wall a bit, 'cause this is just so simple, but still not working: Versions: Apache 1.3.22, mod_perl 1.26, perl 5.6.1 relevant lines from httpd.conf: PerlWarn On PerlModule Apache::PerlVINC Location /dat-ajm6q SetHandler perl-script PerlHandler DAT::Client::WWW PerlINC /home/ajm6q/cvs/dat-head/lib PerlFixupHandlerApache::PerlVINC PerlVersion DAT/Client/WWW.pm /Location Error log when access is attempted (other standard directories edited out for brevity): [Fri May 10 13:39:39 2002] [error] Can't locate DAT/Client/WWW.pm in @INC (@INC contains: /home/ajm6q/cvs/dat-head/lib [... edited out ...]) at /usr/lib/perl5/site_perl/5.6.1/i386-linux/Apache/PerlVINC.pm line 55. The file is, of course, actually there: % ls -l /home/ajm6q/cvs/dat-head/lib/DAT/Client/WWW.pm -rwxrwxr-x1 ajm6qwebwork 394 May 10 12:40 /home/ajm6q/cvs/dat-head/lib/DAT/Client/WWW.pm What am I missing? Does it normally work? (without Apache::PerlVINC) It's possible that you have wrong permissions on one of the segments of /home/ajm6q/cvs/dat-head/lib/DAT/Client/WWW.pm so it cannot read the final path. First test simply with: die $! unless -r /home/ajm6q/cvs/dat-head/lib/DAT/Client/WWW.pm __ 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
Re: how to see /server-status when at MaxClients?
John E. Leon Guerrero wrote: if a job hangs (due to database locking for instance), then a mod_perl child will hang as well (absent some additional watchdog-type program.) if enough jobs hang to the point that we hit MaxClients, then it is too late to use /server-status to see what jobs hung. does anyone have a quick way to indentify the jobs that are currently running? i thought of getting a core and using gdb but i was hoping to find a faster way. it would be nice if we could reserve a couple of children for administrative emergencies such as this. You probably want: Apache::Watchdog::RunAway __ 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
