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RESTFul Web Services

RESTFul Web Services. The Easy Way. What is REST?. Representational State Transfer Maps your CRUD actions to HTTP verbs. Why REST?. Simple, both conceptually and programmatically Simpler and cleaner than SOAP. SOAP Example. POST /InStock HTTP/1.1 Host: www.example.org

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RESTFul Web Services

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  1. RESTFul Web Services The Easy Way

  2. What is REST? • Representational State Transfer • Maps your CRUD actions to HTTP verbs

  3. Why REST? • Simple, both conceptually and programmatically • Simpler and cleaner than SOAP

  4. SOAP Example POST /InStock HTTP/1.1 Host: www.example.org Content-Type: application/soap+xml; charset=utf-8 Content-Length: nnn <?xml version="1.0"?> <soap:Envelope xmlns:soap="http://www.w3.org/2001/12/soap-envelope" soap:encodingStyle="http://www.w3.org/2001/12/soap-encoding"> <soap:Body xmlns:m="http://www.example.org/stock"> <m:GetStockPrice> <m:StockName>IBM</m:StockName> </m:GetStockPrice> </soap:Body> </soap:Envelope>

  5. REST Example GET /stock/IBM HTTP/1.1 Host: www.example.org Accept: application/xml

  6. SOAP Example 2 POST /InStock HTTP/1.1 Host: www.example.org Content-Type: application/soap+xml; charset=utf-8 Content-Length: nnn <?xml version="1.0"?> <soap:Envelopexmlns:soap="http://www.w3.org/2001/12/soap-envelope" soap:encodingStyle="http://www.w3.org/2001/12/soap-encoding"> <soap:Bodyxmlns:m="http://www.example.org/stock"> <m:BuyStock> <m:StockName>IBM</m:StockName> <m:Quantity>50</m:Quantity> </m:BuyStock> </soap:Body> </soap:Envelope>

  7. REST Example 2 POST /order HTTP/1.1 Host: www.example.org Content-Type: application/xml; charset=utf-8 <?xml version="1.0"?> <order> <StockName>IBM</StockName> <Quantity>50</Quantity> </order>

  8. Single Resource Summary • Create • POST /resourceName • Retrieve • GET /resourceName/resourceId • Update • PUT /resourceName/resourceId • Delete • DELETE /resourceName/resourceId

  9. Making it Easy: JSR 311 • JAX-RS: The Java API for RESTful Web Services • No XML Configuration! • Simple annotations to quickly put together some rest based web services. • Can do automatic serialization (both XML and JSON + many others)

  10. Example Application w/ Jersey

  11. Some REST/Jersey/JAXB Gotchas • No real security standard for REST. • Mostly DIY solutions • Hibernate dependencies • Use cg-lib-nodeps

  12. Questions?

  13. The End Sean is reachable at: • iam@seanstoppable.com • www.crazyorgenius.com • @ssmith

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