that switching sounds good for real (known) structures.
Q: How are you accessing chem spider? Is the idea there that you have a
registration key used only by your server?
On Tue, Jan 21, 2014 at 10:38 AM, Otis Rothenberger
<osrot...@chemagic.com>wrote:
> Bob and Pino
>
>
> Possibly. At least for known compounds. Does this fail gracefully?
>
>
> NIST fails gracefully because they return a data not found graphic image.
> I've never encountered a NIST server down issue, so I'm not sure what
> happens there.
>
> The biggest problem with SMILES to InChI is server down with response
> dependent on serve request timeout - i.e. dead air. That's where the page
> locking gets to be a problem.
>
> I'm trying to set things up so that an InChI server down at Resolver
> automatically switches over to ChemSpider. I have that under control client
> side, but not server side. On the client side, I do a very quick AJAX touch
> on Resolver after page loading. If Resolver does not respond in 5 seconds,
> I switch to ChemSpider. I played around with some time intervals, and 5
> seconds seems OK. I've had some good opportunities to test this recently!
>
> x = script("show chemical cas") // but produces a list
>
>
> I get a list also in some situations. The trick is to sort them and use
> the lowest numerical value. For simple compounds, the NIST hit rate is
> pretty good.
>
> All in all, the approach works fairly well even though it is a limited
> database. Of course, our interest is fairly simple molecules.
>
> Otis
>
> --
> Otis Rothenberger
> o...@chemagic.com
> http://chemagic.com
>
>
>
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--
Robert M. Hanson
Larson-Anderson Professor of Chemistry
St. Olaf College
Northfield, MN
http://www.stolaf.edu/people/hansonr
If nature does not answer first what we want,
it is better to take what answer we get.
-- Josiah Willard Gibbs, Lecture XXX, Monday, February 5, 1900
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