Re: [xml] Flushing writers doesn't work...?

[Magnus Lie Hetland <magnus hetland org>]

Daniel Veillard <veillard redhat com>:
> On Wed, Feb 09, 2005 at 10:20:45AM +0100, Magnus Lie Hetland wrote:
> > Hi!
> >
> > I've been using xmlTextWriters as an abstraction in an internal
> > event-based system in my app -- but it seems they don't sync properly
> > when flushed. Maybe I'm expecting too much functionality from
> > xmlTextWriterFlush()? I've used both writers from
>
>   it calls xmlOutputBufferFlush() if there have been some data added
> to the writer, this should really work as expected.

I see. Does this flush the underlying file (in a writer from
xmlNewTextWriterFilename(), for example?

[snip]
>   a better explanation of what you're seeing and how it differs from
> what you are expecting would help. I still don't see what the problem
> might be. You need to be very precise and provide a reproduceable test
> case if possible.

Certainly. I've included a simple example below. After running it, the
file flushed.xml is (on my system) empty, while the file destroyed.xml
contains the full document. I get the same behavior when using
tree-building writers.

(BTW: In order to get some progress, I've now written a small tree
builder myself, based on my event system, without using writers, so
there's no real urgency for me anymore -- mainly curiosity.)

-- flushtest.c -------------------------------------------------------
#include <stdlib.h>
#include <libxml/xmlwriter.h>

int main(int argc, char *argv[]) {
  xmlTextWriterPtr writer = xmlNewTextWriterFilename("output.xml", 0);
  xmlTextWriterStartDocument(writer, NULL, "ISO-8859-1", NULL);
  xmlTextWriterStartElement(writer, BAD_CAST "doc");
  xmlTextWriterWriteString(writer, BAD_CAST "Hello, world!");
  xmlTextWriterEndElement(writer);
  xmlTextWriterEndDocument(writer);
  xmlTextWriterFlush(writer);

  system("cp output.xml flushed.xml");

  xmlFreeTextWriter(writer);

  system("cp output.xml destroyed.xml");
}
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-- 
Magnus Lie Hetland       Fallen flower I see / Returning to its branch
http://hetland.org       Ah! a butterfly.           [Arakida Moritake]