[Zope] Don't treat .data as a big string.

[kosh@aesaeion.com]

What version of python, zope, and os? I have been able to treat them as a
pure string so far in my python products in linux even with several meg
ones. Python 1.5.2, zope 2.3.2,  and debian linux. If you are using
windows writing to a temporary file could kill you anyways because of the
difference ascii/binary difference on windows.

Designing the webpages of tomorrow http://webme-eng.com
Designing the MMORPGS of tomorrow http://worldforge.org

On Thu, 21 Jun 2001, Kyler B. Laird wrote:

>
> I learned my lesson for today, so I thought I'd
> share it.
>
> I am passing around large strings containing
> PDF and PS documents.  Sometimes I make a call
> like
> 	document = container.PJdoc(container['proposal'].data)
> where the object "proposal" is a PDF file.
>
> I end up writing this data to a temporary file
> in my PJ class.  I noticed early on that I
> could not simply write the whole string, but I
> worked around that by writing it in 1K blocks.
>
> I had my warning.
>
> Today my dumb kludge came back to bite me.  We
> found that some of our proposals were rejected
> by the PDF parser.  I started looking at the
> temporary files and noticed the problem ones
> were 98798 bytes in length.  The PDF file sent
> was much larger.
>
> After some tests, I determined that asking for
> a slice from .data only returns a null string
> (zero length) after 98798 bytes.  This meant
> that my little 1K write loop was happily going
> through the "string" but it was writing 0K
> blocks after awhile.
>
> So...I finally fixed the problem.  Instead of
> all of the 1K writing junk, I simply cast
> whatever is passed to me into a real string.
> Then I can write the whole thing without any
> problems.
>
> I'm sure this is documented somewhere that I
> should have read before, but I'm hoping having
> it here too saves someone some grief.
>
> Thank you.
>
> --kyler
>
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