GFSlideshow only loads some feeds, not others.

[turbo durso]

Hello !

I've just started playing around with the slideshow api. I've set it up following the instructions and it works great with the feed provided, as well as with any other feed from picasa or photobucket.

But when i try it with, for example, the following two feeds :

• http://www.nasa.gov/rss/dyn/image_of_the_day.rss
• http://apod.nasa.gov/apod.rss

Nothing comes up. Neither with others, from various sources.

Does the api only support certain types of feeds ?
I understand they are 'media feeds', does that make them different from others ?

I have checked with firebug and no error comes up. Everything seems to work smoothly minus the images not loading !

I'm missing something obviously.

Thank you for your help & enlightenment.

[Jeremy Geerdes]

There are a number of reasons this could be happening.Check the network pane in Firebug or Chrome Dev Tools to see what, if any response, you're actually getting from Google's servers for these feeds. But to be honest, the problem is probably not that you're not getting data back from Google. Because there is no real accepted standard for media feeds such as these, there are any number of custom namespaces and approaches to including imagery in a feed. The SlideShow script allows you to define the tag that it needs to look for to find the image url (e.g., if there is a <link rel="image">IMAGE_URL_HERE</link> element in the feed). Alternatively, the script also accepts a function to parse the image url out of the feed element using DOM methods and/or regular expressions, etc. This is the method you would have to use to get the image URLs from the second feed you linked.

And then there are some feeds which will just be useless for the slideshow. For instance, the first feed you linked, while it points to the NASA photo of the day, it contains only links to the webpages for the various images and not the images themselves. So there's no way you would be able to get the image URL from the feed using a JS-only implementation.

jg

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Jeremy R. Geerdes

Generally Cool Guy

Des Moines, IA

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