[rt-devel] Statistics3 package - corrupted PNG images

[Kelly F. Hickel]

Found Jesse's note.  The release with the fix in it was RTFM 2.0.3.RC1,
and his email to rt-users was dated 1/8/2004 at 6:09pm.

Kelly F. Hickel
Senior Software Architect
MQSoftware, Inc
952.345.8677
kfh at mqsoftware.com


> -----Original Message-----
> From: Kelly F. Hickel
> Sent: Friday, January 30, 2004 4:22 PM
> To: Alex Rebrik; rt-devel at lists.bestpractical.com
> Subject: RE: [rt-devel] Statistics3 package - corrupted PNG images
> 
> Alex,
> 	The "extra newline" seems to have been caused by a semi-recent
> change to RTFM.  Jesse released a newer version to fix this a couple
of
> weeks ago (sorry don't remember the date or RTFM version, you could
> check the archives), and that seemed to correct it.  It didn't work
for
> me until I realized that I had some tweaked RTFM files in my local
area
> (since those override the ones in the share area where RTFM is
installed
> by default).  Once I removed the local versions, the problem went
away.
> 
> Kelly F. Hickel
> Senior Software Architect
> MQSoftware, Inc
> 952.345.8677
> kfh at mqsoftware.com
> 
> 
> > -----Original Message-----
> > From: Alex Rebrik [mailto:arebrik at zappos.com]
> > Sent: Friday, January 30, 2004 4:19 PM
> > To: rt-devel at lists.bestpractical.com
> > Subject: [rt-devel] Statistics3 package - corrupted PNG images
> >
> > Hi everyone,
> >
> > I've noticed quite a few messages on the lists regarding corrupted
> > graphs' images genereated by Haralad Wagener's Statistics3 package.
I
> > too was faced with the same problem, particularly new-line being
added
> > in the begining of image output resulting in broken PNG image
header.
> > While I didn't find any practicle resolution to this issue in the
list
> > archive I was nevertheless able to solve the problem a few ways.
Here
> is
> > what I did:
> >
> > 1. I figured out that when printing to a file images are generated
> > properly. So explicitly specified the STDOUT descriptor in print
> > statement and that resulted in proper image being generated. So for
> > example in "Statistics/Resolution/Elements/Chart" print satement
looks
> > like:
> >
> > <%perl>
> > print STDOUT $graph->plot(\@data)->$format();
> > ---SNIP---
> >
> > 2. Reading up on HTML::Mason I found out that Mason buffers all its
> > output but gives you a way to clear the buffer. Next thing I tried
is
> to
> > revert to original print statement without explicitly naming STDOUT
> > descriptor but clearing the output buffer beforehand. This also has
> > worked and generated proper images not prepended by a newline.
> >
> > <%perl>
> > $m->clear_buffer();
> > print $graph->plot(\@data)->$format();
> > ---SNIP---
> >
> > 3. HTML::Mason has a preferred output method $m->out(), replacing
> print
> > statement with $m->out has also worked, but $m->clear_buffer() was
> still
> > necessary to avoid newline injection.
> >
> > <%perl>
> > $m->clear_buffer();
> > $m->out($graph->plot(\@data)->$format());
> > ---SNIP---
> >
> > Hope this is helpful to some of you having similar issues.
> >
> > --Alex
> >
> > _______________________________________________
> > rt-devel mailing list
> > rt-devel at lists.bestpractical.com
> > http://lists.bestpractical.com/mailman/listinfo/rt-devel
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