Gossamer Forum: General: Perl Programming: Image::Magick and mod

Dec 3, 2009, 12:49 PM

eupos

User (339 posts)

Dec 3, 2009, 12:49 PM

Post #1 of 8

Shortcut

Image::Magick and mod_perl won't work together

Hello,

I wrote a litle plugin for GLinks to serve my needs for multiple images per link and also multiple thumbs per image. And, everything was fine till the moment I've tried to use it under mod_perl, when user tries to upload the image GLinks takes care of uploading but after that when I run subroutine for thumbnailing Apache returns 500 Server Error :(

Does anyone else run in to such a problem?
This is killing me :(

Cheers,
Boris

Facebook, Twitter and Google+ Auth for GLinks and GCommunity | reCAPTCHA for GLinks | Free GLinks Plugins

Dec 3, 2009, 1:09 PM

brewt

Staff (4101 posts)

Dec 3, 2009, 1:09 PM

Post #2 of 8

Shortcut

Re: [eupos] Image::Magick and mod_perl won't work together In reply to

What's the error?

Oh, missed the part about Image::Magick. It's known to cause segfaults while being run under modperl. We usually just run it by calling the convert binary for this reason.

Adrian

Last edited by:

brewt: Dec 3, 2009, 1:11 PM

Dec 3, 2009, 1:24 PM

eupos

User (339 posts)

Dec 3, 2009, 1:24 PM

Post #3 of 8

Shortcut

Re: [brewt] Image::Magick and mod_perl won't work together In reply to

No error at all :(

Code:
my $main = $resizer->Read($image->{image_path}); 
if ($main) { warn "Error: $main";}

on this code $main is undef no errors no clue, but still Apache returns 500 error.
Weird!

So you propose me to use exec to binary instead?

Cheers,
Boris

Facebook, Twitter and Google+ Auth for GLinks and GCommunity | reCAPTCHA for GLinks | Free GLinks Plugins

Dec 3, 2009, 5:49 PM

dan

Enthusiast (760 posts)

Dec 3, 2009, 5:49 PM

Post #4 of 8

Shortcut

Re: [eupos] Image::Magick and mod_perl won't work together In reply to

What is the corresponding error in your server error log?

----
Cheers,

Dan
Founder and CEO

LionsGate Creative
GoodPassRobot
Magelln

Dec 3, 2009, 11:05 PM

eupos

User (339 posts)

Dec 3, 2009, 11:05 PM

Post #5 of 8

Shortcut

Re: [dan] Image::Magick and mod_perl won't work together In reply to

Hi, Dan

Code:
Premature end of script headers:

But that gives no clue, the situation happens when IM actually start reading the image and it returns no error on this only 500 Status from Apache and the line in error log above.

Cheers,
Boris

Facebook, Twitter and Google+ Auth for GLinks and GCommunity | reCAPTCHA for GLinks | Free GLinks Plugins

Dec 4, 2009, 12:02 AM

Andy

Veteran / Moderator (18441 posts)

Dec 4, 2009, 12:02 AM

Post #6 of 8

Shortcut

Re: [eupos] Image::Magick and mod_perl won't work together In reply to

Hi,

We had the same problem with the Image::Magick module under mod_perl.

As Adrian suggested, I would just try it using the command line:

`convert ...`

Here is an example from a script I did a while back:

Code:
   my $command = qq~convert '$path' -resize ${width}x${height} $WriteImage ~; 
   `$command`;

Cheers

Andy (mod)
andy@ultranerds.co.uk

Dec 4, 2009, 12:16 AM

eupos

User (339 posts)

Dec 4, 2009, 12:16 AM

Post #7 of 8

Shortcut

Re: [Andy] Image::Magick and mod_perl won't work together In reply to

Thanks Andy,
I've done the same last night Whistle

But ported my code a bit to work on both with checking if GLinks running under persist environment, because i tested with speedy_cgi too and seems ImageMagick have problem with too Frown

And in this light, which one is better GD or ImageMagick for thumbnailing, which is faster?
For now I see GD has some very nasty command syntax, but ImageMagick have nasty error handling, and also seems they not update often documentation for perl modules.

Cheers,
Boris

Facebook, Twitter and Google+ Auth for GLinks and GCommunity | reCAPTCHA for GLinks | Free GLinks Plugins

Dec 4, 2009, 12:20 AM

Andy

Veteran / Moderator (18441 posts)

Dec 4, 2009, 12:20 AM

Post #8 of 8

Shortcut

Re: [eupos] Image::Magick and mod_perl won't work together In reply to

Hi,

Well, with GD - you could try using http://search.cpan.org/...Resize-0.5/Resize.pm , which I use (makes it sooo much easier than entering loads of paramaters etc)

In terms of speed - afraid I'm not sure (I would imagine GD is quicker, but can't proove that as I've never done any benchmark tests =))

Cheers

Andy (mod)
andy@ultranerds.co.uk