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Intro to Hypermedia APIs
 

Intro to Hypermedia APIs

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An introduction to Hypermedia APIs from software developer Eric Oestrich.

An introduction to Hypermedia APIs from software developer Eric Oestrich.

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    Intro to Hypermedia APIs Intro to Hypermedia APIs Presentation Transcript

    • Introduction toHypermedia APIs Eric Oestrich @ericoestrich oestri.ch smartlogicsolutions.com
    • What is a Hypermedia API?
    • RESTREpresentational State Transfer
    • Relies Heavily on HTTP● Methods and URI● Media Types● Client Server
    • Relies Heavily on HTTP (Cont)● Stateless● Caching● Uniform Interface (HATEOAS)
    • Methods and URIs
    • Five RoutesGET /ordersPOST /ordersGET /orders/:idPUT /orders/:idDELETE /orders/:id
    • GET /orders List of orders
    • POST /orders Create an order
    • GET /orders/:id View a single order
    • PUT /orders/:idReplace or create an order
    • DELETE /orders/:id Delete an order
    • A bit about HTTP Verbs
    • GETRetrieve a resource
    • POSTMost generic
    • PUTReplace or Create Not partial
    • DELETEDelete a resource
    • PATCHUpdate partially Must be a diff
    • Media Types
    • Formats● JSON● XML● XHTML
    • Setting the Media Type● Accept Headers● Rails way - .:format
    • Representational based Models != Representations
    • Uniform Interface
    • Uniform Interface● Identification of resources● Manipulation of resources via representations● Self descriptive messages● Hypermedia as the engine of application state
    • Identification of resources
    • Manipulation of resources via representations
    • Self descriptive messages Statelessness
    • Hypermedia as the engine of application state HATEOAS
    • Clients should not know how to build routes
    • Enter HALJSON cannot describe a link
    • HAL is a media type fordefining links in JSON application/hal+json
    • The Goal GET /
    • Great, now I know what a Hypermedia API is.
    • How do I make one?
    • Rails + Lots of Gems Also monkey patching
    • Gems● ActiveModel::Serializer● RspecApiDocumentation● Raddocs● A few other handy ones
    • $ rails new hypermedia_api --skip-test-unit
    • $ vim Gemfilegem raddocsgem active_model_serializers
    • $ vim Gemfilegroup :test, :development do gem rspec-rails gem rspec_api_documentationend
    • Get rspec set up
    • Create our firstacceptance test
    • Generate models, index action, serializers
    • Show
    • Create
    • Update
    • Delete
    • Setup HALLet the monkey patching begin
    • Were missingsomething...
    • $ curl http://localhost:3000/ ""
    • Root Resource
    • Questions? Eric Oestrich @ericoestrich oestri.chsmartlogicsolutions.com