On Thu, 2009-11-19 at 11:55 -0800, explainer wrote:

> I would like my Rails app to supply a callback url to another app.  I
> currently have a yaml file in the config folder in which I put the
> host name, but I would like to be able to query that dynamically and
> do away with the yaml file.  Is there a method call that returns the
> current host?
> 

probably you want to write a little rack middleware app here,
check this link and the comments with code underneath,
http://coderack.org/users/laktek/entries/11-server-proxy



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