[Koha-bugs] [Bug 7187] Prioritize cover image sources such as Amazon, Google and add fail over i.e. if first source fails, go to next

[bugzilla-daemon at bugs.koha-community.org]

http://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=7187

Manos PETRIDIS <egpetridis at yahoo.com> changed:

           What    |Removed                     |Added
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             Status|NEW                         |In Discussion

--- Comment #16 from Manos PETRIDIS <egpetridis at yahoo.com> ---
(In reply to comment #6)
> One thing we need to decide on is whether the logic that checks multiple
> sources should be in JavaScript on the client side or Perl on the server
> side. I'm leaning towards Perl on the server, for two reasons: 
> 
> 1. Displaying an image could be as simple as this:
> 
>   <img src="opac-ver.pl?biblionumber=x" />
> 
> 2. We could cache the results of looking through multiple sources. (Caching
> might violate the terms of service for e.g. Amazon, but then we could check
> them last, after we have checked the ones that we can cache.)

Just a comment from an end-user: Could it be that Amazon returns an image, even
when no cover image is available in its systems? I'm referring to the "No image
available" with a hint of a smile/bent arrow below image.

Unless Amazon does provide for an indication that the image it provides is a
placeholder for the cover image it does not [yet] have, caching might prove
tricky, for it could hinder future [successful] look-ups in Amazon. 

Furthermore, should Amazon be at the top of the list, successfuly fetching a
placeholder image from Amazon would prevent koha from retrieving a correct
cover image from some other source down the list.

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