[gdal-dev] Can OGR WFS driver take advantage of WFS Server streaming?

[Yingqi Tang]

Thanks for confirming it, Even. I have two follow up questions though:

1. Does the GML driver (reading local big GML file) also load the whole GML
in memory too?
2. Does the GML driver take url pointing to a GML?

Thanks

On Wed, May 16, 2012 at 3:20 PM, Even Rouault
<even.rouault at mines-paris.org>wrote:

> Le mercredi 16 mai 2012 23:58:29, Yingqi Tang a écrit :
> > Hi all,
> >
> > I am communicating against a WFS server which supports data (GML)
> > streaming, which means that once I send a GetFeature quest for a big GML
> > (2.0GB+), server will take only seconds to start streaming GML back to
> > client while at the same time it's still preparing the rest of the big
> GML.
> >
> > Now I wonder if GDAL/OGR WFS client can take advantage of that? Will I be
> > able to access the first few features while the streaming is still going
> > on? It seems to me that it doesn't because it always waiting the whole
> big
> > GML response is loaded in memory.
>
> Yes indeed, the OGR WFS driver waits for the whole response to be
> downloaded
> before parsing it. It could be desirable to have on-the-fly parsing
> indeed, but
> we currently lack the capability of doing it with the way we use the Curl
> library.
>
> >
> > Thanks
>
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