[Koha] opac add-on

[Owen Leonard]

> here is an example
> 
http://www.amazon.com/exec/obidos/ASIN/073571228x/qid%3D1099770
587/sr%3D11-1/ref%3Dsr%5F11%5F1/102-8947619-9086523
>  
> 
http://www.amazon.com/exec/obidos/ASIN/1861004494/qid%3D1099770
864/sr%3D11-1/ref%3Dsr%5F11%5F1/102-8947619-9086523
> 
> the isbn# folows the /ASIN/ in the url 
> note that the next pointer /qid%xxx... has changed.
> 
> simply changing the field after /ASIN/ to the isbn
> will not give you the correct result.

If I understand you correctly, the root of your problem is 
that all the stuff *after* the ISBN doesn't matter at all.  
It's all session stuff.  All you need is this:

http://www.amazon.com/exec/obidos/ASIN/073571228x/

...in order to pull up an Amazon record.  Amazon adds all the 
rest.  So we make the link in the template like this:

http://www.amazon.com/exec/obidos/ASIN/<!-- TMPL_VAR 
NAME="isbn" -->

It should work fine.  

> 3. a computer driven enter or cr.

This is the part that's not possible.  You can't simulate user 
input like that on a separate site.  And if we're just talking 
about pulling up an Amazon record from an ISBN, we don't have 
to.

One concern, however, is how far to trust Amazon to always 
have details on the item in your catalog.  That's where a 
solution like Chris' has advantages--you're sucking down the 
information into your own database, so you know whether 
there's extended information to display.

  -- Owen