[Zope] Reportlab issue

[Jonathan]

----- Original Message ----- 
From: "David H" <bluepaul at earthlink.net>
To: "zope user list" <zope at zope.org>
Sent: Sunday, August 27, 2006 8:54 PM
Subject: [Zope] Reportlab issue


> Hi Zope List,
>
> I have an Zope application that uses ReportLab to generate acrobat 
> viewable reports. (I already posted this to reportlab list - so far no 
> solutions).
>
> Heres the problem:
>
> I display an acrobat report (using Firefox or IE 6) and say scroll down to 
> page 10.  I then use the <browser> back button to re-enter my Zope 
> application.
>
> Now, even if I click various unrelated pages in the application  (clearing 
> the request,etc) and then return to the Report (which is always freshly 
> generated) it will try to re-display at page 10 - instead of top of page.
> This occurs even if the data being reported has changed, and this occurs 
> even if a different report is generated!
>
> Note: that I use
>
> import tempfile and
> tmpFile2 = tempfile.mktemp()
>
> to keep pdfPath's unique ...
>
> I've tried combinations of "Content-Disposition" params like changing 
> filename=, etc.  Nothing is changing this behavior.
>
> I've tried (a reportlab mailing list suggestion) varying to <forms action= 
> like
>
>   <form name="printform" method="post" action="extensions/pyBudgetReports"
>         tal:attributes="action python: 
> 'extensions/pyBudgetReports/?random=' + context.python.pyTime()">
>
> No help either.


I have never used ReportLab, but is there a possibility that when you go 
back to the adobe document it is being served from a cache?  You could try 
using html meta tags or response.setHeader (better) to make sure the 
document is not being served from the cache.

Just a shot in the dark!


Jonathan