SOAP vs REST

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(Check my blog @ http://www.marioalmeida.eu/ )
Comparison between SOAP and REST.

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  • Thank you for posting this, however the title should be 'Why REST is better than SOAP' since the bias becomes quickly obvious.
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SOAP vs REST

  1. 1. SOAP vs RESTPresentation by Mario Almeida
  2. 2. Index● What is a webservice?● Services interoperability● What is SOAP?● What is REST?● Peek at competition● Characteristics ○ Popularity ○ Simplicity ○ Bandwidth ○ Security ○ Caching ○ State● Problems● Conclusion
  3. 3. What is a Webservice?"Software system designed to supportinteroperable machine-to-machine interactionover a network" - W3C
  4. 4. Services interoperability!Systems interact with the web service usingmessages sent through HTTP generally with anXML serialization.
  5. 5. What is SOAP?Simple Object Access Protocol
  6. 6. What is REST?Representational State Transfer
  7. 7. Lets take a peek on the competition!● Yahoo and all its services such as Flickr and deli.ici.ous use REST● Amazon and Ebay provide both though Amazons internal usage is nearly all REST.● Google used to provide SOAP for all their services, but in 2006 they deprecated in favor of REST.
  8. 8. Characteristics: SimplicityREST:● Is easy to build - no toolkits required!● Just figure how to create and modify the URI to access different web resources!SOAP:● Requires a toolkit to form requests and parse results!● Requires specific knowledge of a new XML specification.
  9. 9. Characteristics: Bandwidth!REST:● can be short!SOAP:● requires an XML wrapper around every request and response● once namespaces and typing are declared can take 10 times as many bytes as the same message in REST.
  10. 10. Characteristics: Security!REST:● easy to analyze the intent of each message by checking the HTTP command!● Certificates and LDAP can delegate authentication and authorization to the network layer.● Secure data should never be sent as parameters in the URI.SOAP:● Needs to look into SOAP envelope!● Authentication and authorization in the application layer.
  11. 11. Characteristics: Caching!Caching?● take advantage of all the caching infrastructure that is built into the Web infrastructure.
  12. 12. Characteristics: State!Session State is Evil! (SOAP)● Enormous impact on scalability and avalability.
  13. 13. Other problems?● Banking transactions? ○ ACID properties! ○ Reliable messaging! ○ Enterprise security features!● Language support? (SOAP) ○ Good: .NET, Java (Axis) ○ Ok: C++ (gSOAP), PERL (SOAP::Lite) ○ Poor: Phyton (SOAPpy, ZSI, PHP● File transfers?
  14. 14. Conclusion: What purpose?How important are the ACID properties?What security measures?Scalability? Availability?
  15. 15. Conclusion: How fast?What is the Learning curve?How is the Testing?How is the Error Handling?
  16. 16. Future?● SOAP has been evolving in a way that it is more similar to REST by allowing other HTTP commands.● Hypermedia as the engine of application state.● Uniform interfaces● Stateless communications between servers and clients.
  17. 17. References● http://geeknizer.com/rest-vs-soap-using-http-choosing-the-right- webservice-protocol/● http://davidvancouvering.blogspot.com/2007/09/session-state-is-evil.html● http://www.javaworld.com/javaworld/jw-03-2002/jw-0308-soap.html - caching SOAP services on client side● http://roy.gbiv.com/untangled/2008/rest-apis-must-be-hypertext-driven● http://tomayko.com/writings/rest-to-my-wife● http://www.25hoursaday. com/weblog/2005/03/17/ETech2005TripReportBuildingANewWebServiceA tGoogle.aspx
  18. 18. ImagesAll of the following images have creative common rights:● http://www.flickr.com/photos/ahmadnawawi/3808452611 - stock market● www.flickr.com/photos/soldiersmediacenter/4723608143 - handshake● http://www.flickr.com/photos/oceanflynn/6638184545 - networks● http://www.flickr.com/photos/mybloodyself/5659661793 - clock● http://www.flickr.com/photos/tim_norris/2789759648 - snail● http://www.flickr.com/photos/garrette/53235940/ - pc● http://www.flickr.com/photos/legofenris/5410534167 - darth vader

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