Online ebook catalogs in Atom

As I recently wrote, I have a new-found interest in ebooks (I also bought four new textbooks from O’Reilly using a BOGOF offer to pick up 97 Things Every Programmer Should Know, 97 Things Every Project Manager Should Know, Beautiful Code and The Art of Agile Development).

I mainly read ebooks on my Android device, specifically, using Aldiko.

Aldiko has a built in browser for the feedbooks.com catalog, but also gives you the ability to add your own catalogs. A friend told me that Calibre, a popular ebook management programme, has a web interface which one of the other popular Android ebook readers (WordPlayer) could be pointed at in order to add custom catalogs. After a quick trial and a few Google searches, I realised that WordPlayer actually subscribes to an XML file hosted on http://localhost/calibre/stanza

Opening this file shows it to be Atom, where each entry is a small metadata container and the link element is used to reference the actual book and images that represent it, like this:


    <link type="application/epub+zip" href="/get/epub/3"/>
    <link rel="x-stanza-cover-image" type="image/jpeg" href="/get/cover/3"/>
    <link rel="x-stanza-cover-image-thumbnail" type="image/jpeg" href="/get/thumb/3"/>

Another few searches showed this to be a draft specification called openpub. Aldiko supports this, so adding the /stanza URL to a custom catalog works there too! Voila, custom catalogs in Aldiko. Marvellous!

It should only require a tiny bit of work to write code that serves a catalog straight from the filesystem without the overhead of Calibre (which I found to be quite heavyweight). This is what I have started here.

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2 thoughts on “Online ebook catalogs in Atom”

  1. Hey Phil,

    I’ve been trying out Android on the emulator (iPhone 3G user now) and liked the few articles you have here. If you ever get anything other than a Droid or have your eye on anything (like you said in a previous post “keep you on Android) it’d definitely be cool to see a post about that. I’m a Calibre user too, so I’m gonna download this book app and give it a whirl (I use Kindle/Stanza usually on iPhone).

    Thanks,
    Neil

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