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Posted to user@poi.apache.org by Leila Homaeian <le...@cs.ualberta.ca> on 2006/08/10 22:36:33 UTC

Get text from a URL pointing to a ppt file

Hello,

I am trying to use SlideShow.getSlides() to get slides from a URL pointing 
to a powerpoint file. The problem is that I am not getting the 
slides in the correct order. However, if I download the ppt file and run 
the same program, The order of the slides is much closer to the real 
order, i.e. at least I get the first few slides in order (and this is 
what I need). Any idea how I can fix the problem?

Thanks,
Leila

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Re: Get text from a URL pointing to a ppt file

Posted by Nick Burch <ni...@torchbox.com>.
On Thu, 10 Aug 2006, Leila Homaeian wrote:
> I am trying to use SlideShow.getSlides() to get slides from a URL 
> pointing to a powerpoint file. The problem is that I am not getting the 
> slides in the correct order. However, if I download the ppt file and run 
> the same program, The order of the slides is much closer to the real 
> order, i.e. at least I get the first few slides in order (and this is 
> what I need). Any idea how I can fix the problem?

That sounds very odd. I'd try using your URL fetching code to just stream 
the data to disk, and check from that. Does the data streamed to disk 
differ from when you download via your web browser?

Also, are you using a recent SVN checkout of HSLF? There were some patches 
from Yegor committed fairly recently that should've improved the slide 
ordering detection

Nick

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Re: Get text from a URL pointing to a ppt file

Posted by Yegor Kozlov <ye...@dinom.ru>.
Hi,

I think it can be caching issue.

I guess your code was something like this:

  URL url = new URL("http://localhost:8080/analysis.ppt");
  URLConnection conn = url.openConnection();
  InputStream is = conn.getInputStream();

  SlideShow ppt = new SlideShow(is); //the order of slides is  incorrect

I would try to call conn.setUseCaches(false) before opening the input
stream:

  URL url = new URL("http://localhost:8080/analysis.ppt");
  URLConnection conn = url.openConnection();
  conn.setUseCaches(false);
  InputStream is = conn.getInputStream();

  SlideShow ppt = new SlideShow(is); //Does it fix the problem?

Regards, Yegor

LH> Hello,

LH> I am trying to use SlideShow.getSlides() to get slides from a URL pointing 
LH> to a powerpoint file. The problem is that I am not getting the 
LH> slides in the correct order. However, if I download the ppt file and run 
LH> the same program, The order of the slides is much closer to the real 
LH> order, i.e. at least I get the first few slides in order (and this is 
LH> what I need). Any idea how I can fix the problem?

LH> Thanks,
LH> Leila

LH> ---------------------------------------------------------------------
LH> To unsubscribe, e-mail: poi-user-unsubscribe@jakarta.apache.org
LH> Mailing List:     http://jakarta.apache.org/site/mail2.html#poi
LH> The Apache Jakarta Poi Project:  http://jakarta.apache.org/poi/


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