Reverse Engineering APIs

Transcript

1. 1.

   Reverse Engineering APIs Raimon Grau & Michal Cichra 3scale

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   Inspecting APIs github.com/kidd & github.com/mikz 3scale

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   Debugging APIs raimon@3scale.net & michal@3scale.net 3scale

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   APIs Everywhere

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   Get in touch! hello@apitools.com Cases of study • ‘Hidden’ API:

   Sonos • Combining APIs: Bicing on steroids
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   Get in touch! hello@apitools.com Sonos

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   Get in touch! hello@apitools.com Sonos

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   Get in touch! hello@apitools.com Sonos

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   Get in touch! hello@apitools.com Sonos

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    Get in touch! hello@apitools.com Sonos

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    Demotime!

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    Yay! :) or nay :(

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    Get in touch! hello@apitools.com What else you could do? •

    Transfer song from Spotify to the Sonos • Backup playlists • Stream the music to remote locations • Vote the songs added to the queue
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    Get in touch! hello@apitools.com Case 2: Api aggregation Bicing +

    Google Maps Source: Carlos Mejía Greene https://www.flickr.com/photos/carlitos/3101121106/ CC BY-NC-SA 2.0
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    Get in touch! hello@apitools.com Improvements • Reduce transfer size •

    Reduce roundtrips • Improve accuracy by getting info from multiple sources • Improve API interface
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    Get in touch! hello@apitools.com Api Aggregation Mobile app Middleware Web

    APIs requests responses
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    Get in touch! hello@apitools.com Api Aggregation Mobile app Middleware Web

    APIs requests responses http://techblog.netflix.com/2013/01/optimizing-netflix-api.html
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    Demotime!

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    Get in touch! hello@apitools.com How we improved? Size Savings Response

    time Original XML 131k ~0.7s JSON 80k 39% ~0.7s JSON with distances 91k 30% ~0.7s nearest 10 5k 96% ~0.8s
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    Get in touch! hello@apitools.com What APIs to combine? Hue +

    Google Calendar Google Maps + Foursquare Sonos + Last.fm Dropbox + Github Almost any, actually
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    Get in touch! hello@apitools.com What do we get from it?

    • As hackers we like to know what’s under the hood • Cross API • We can ‘discover’ hidden APIs. :) • It’s fun! • We can improve performance by aggregating multiple calls.
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    Get in touch! hello@apitools.com Special Treat Primavera Sound Festival 2014

    fake apps on Google Play Store real iOS app with a twist
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    Thank You and Happy Hacking! www.apitools.com @apitools - hello@apitools.com raimon@3scale.net

    / michal@3scale.net