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Re: bookmarking images


The output filename does not expire with each session.  It is generated
with the Digest-MD5 perl module.  This module converts arbitrary input
into an RSA encrypted string, called a 'digest'.  In the case of LAS,
the arbitrary input is the xml request coming to the data server.

So, whenever you ask for exactly the same thing, you will generate
exactly the same encrypted file name.  Unfortunately, you cannot
regenerate the xml request from the file name.

This doesn't address your issue of a permanent URL for a specific output
graphic.  Currently there is no mechanism for this in LAS.

-- Jon

Joe Wielgosz wrote:

> Is there a way to bookmark a las-generated image so that it will be
> automatically regenerated if it has expired from the cache?
> I assume that URLs of the form
> las-output/d6c5e016e894cd5f0c1995547cc00e46.gif are just temporary
> unique ID's which are only valid within a session..
> - Joe
> Joe Wielgosz / joew@cola.iges.org
> ---------------------------------------------------
> Center for Ocean-Land-Atmosphere Studies (COLA)
> Institute for Global Environment and Society (IGES)
> http://www.iges.org

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