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Make your Pony fly with Google App Engine

Make your Pony fly with Google App Engine

Why and how could be useful developing web services with Django and deploying them on Google App Engine

Massimiliano Pippi

November 16, 2013
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  1. 16.Nov.2013 DevFest @ Rome
    Google Developer Group
    http://gdg-perugia.org

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  2. Massimiliano Pippi
    Software Developer, Python Lover, Dad.
    @maxpippi
    http://github.com/masci
    http://dev.pippi.im
    Who are you?

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  3. Make your pony fly
    with Google App Engine

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  4. A pythonista in the lands of Java

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  5. ● easy to learn, simple to use
    ● clean syntax
    ● huge range of libraries
    ● rapid prototyping
    ● vast documentation
    ● friendly community
    ● named after Monty Python
    Why Python?

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  6. ● easy to learn, simple to use
    ● automatic scaling
    ● deploy and forget
    Why App Engine?

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  7. Why Django?
    ● easy to learn, simple to use
    ● full stack
    ● modular (almost)
    ● named after Django Reinhardt

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  8. What can a pony do for you?
    Some sweeties for mobile developers
    ● data backends exposing REST api
    ● backoffice systems and CRUDs
    ● servers talking to cloud messaging services

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  9. The pony into the wild
    Build a REST web service in minutes
    ● design the business model
    ● provide a REST api
    ● authenticate users with the OAuth2 framework

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  10. Toodo app
    Track a list of tasks with a description and a flag to mark
    them as done
    The Model

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  11. Django Restframework
    (third party application providing some magic)
    The API

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  12. The API
    URL style HTTP Method Action URL Name
    / GET show API infos api-root
    /tasks/[.format]
    GET list tasks
    tasks-list
    POST create a new task
    /tasks/{id}/[.format]
    GET retrieve task
    tasks-detail
    PUT update task
    PATCH partially update task
    DELETE destroy task
    Data serialized in dozen of formats out of the box: JSON, JSONP, XML, Yaml
    and others, plus you can write your very own.
    Bonus: api browser

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  13. Interact with the API through html pages and form (it’s free)
    The API browser

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  14. The API browser

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  15. The API browser

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  16. Django OAuth Toolkit
    (third party application providing oauth goodies)
    Let’s do OAuth2
    (seriously, that’s all folks!)
    Now the system acts as an OAuth2 provider and the api endpoints grant
    access to clients providing valid tokens

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  17. Hooray, we found the Grail!

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  18. Well, not quite.
    There are a lot of pros running Django on App Engine
    ● one-click deploy, app versioning
    ● scale as you want
    ● Google infrastructure
    But some of the cons could be blocking
    ● Google Cloud SQL is the only backend supported by
    the Django ORM
    ● Google Cloud SQL has no free tiers (at the moment)
    ● Google Cloud SQL is MySql

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  19. Thanks for your attention!
    Questions?
    (in the meantime, take a look at the code)
    https://github.com/masci/toodo
    http://django-rest-framework.org
    https://github.com/evonove/django-oauth-toolkit
    Massimiliano Pippi
    @maxpippi
    http://github.com/masci
    http://dev.pippi.im

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