Remi Jolin - SysGroup wrote:
> Hello,
>
> le 02.02.2009 17:27 Jim Steil a écrit:
>
>> Hi
>>
>> I use the following code to display PDF files. This has worked for me
>> for a couple years. All of a sudden, this stopped working for some of
>> our PDFs. Some display correctly, but some do not. This happens only
>> on my production box (Win 2003), but works fine on my test/dvlp
>> environment (WinXP). I don't even know where to begin trying to debug
>> this. No errors are thrown. In the browser, it's as if the document
>> displayed, but it really didn't. The title has changed to the one that
>> should be displayed, but the page never changes. It is not still
>> processing, but just seems to have forgotten to display the PDF. This
>> is happening on all clients trying to connect, whether using IE or
>> Firefox.
>>
>> def documentDisplay(self, *args, **kw):
>> documentId = args[0]
>> doc = Document.get(documentId)
>>
>> pdfFile = StringIO.StringIO()
>> resourceDir = cherrypy.config.get('motion.resourcedir')
>> f = open('%sdocuments/%s' % (resourceDir, doc.documentName), 'rb')
>>
>> while 1:
>> data = f.read(1024*8)
>> if not data:break
>> pdfFile.write(data)
>> f.close()
>>
>> pdf = pdfFile.getvalue()
>> pdfFile.close()
>>
>> return(pdf)
>>
>>
>>
> You could first check the length of the 'pdf' variable... Is it coherent
> with the actual length of the file ?
>
> Are you PDFs static or generated dynamically on the fly just before
> displaying them. In that case it could be a "flush" issue of the
> generated file not closed (so not flushed) to the disk while you try to
> read it.
>
> And I was just wondering why you use a StringIO and not directly
> pdf = f.read()
>
>
> >
>
Remi, thanks for your reply.
The short answer is because that is what I copied from someone else's
code. I implemented the change you suggested, but it made no difference.
I should have mentioned that this is happening when I display PDFs from
a number of different creation methods. I use this method to display
PDFs from a library of documents that we have but I also generate PDFs
on the fly using ReportLab. Again, it is an inconsistent problem. After
more digging, it appears as though it is related to the size of the
document that I'm trying to display. I have successfully displayed all
documents 976 KB or smaller but cannot display any files that are 1050
KB or larger. Anyone have any idea where I can begin debugging this issue?
After my first post I noticed I didn't have the same TG environment on
both systems. I've upgrade both systems to TG 1.0.8 and still have the
same behavior, works in my dvlp environment, but not production. Again,
this has worked in production for a over a year and all of a sudden quit
working. No changes were made to the box except for Windows patches.
-Jim
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