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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 SOAP vs REST Presentation Transcript

  • SOAP vs RESTPresentation by Mario Almeida
  • 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
  • What is a Webservice?"Software system designed to supportinteroperable machine-to-machine interactionover a network" - W3C
  • Services interoperability!Systems interact with the web service usingmessages sent through HTTP generally with anXML serialization.
  • What is SOAP?Simple Object Access Protocol
  • What is REST?Representational State Transfer
  • 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.
  • 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.
  • 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.
  • 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.
  • Characteristics: Caching!Caching?● take advantage of all the caching infrastructure that is built into the Web infrastructure.
  • Characteristics: State!Session State is Evil! (SOAP)● Enormous impact on scalability and avalability.
  • 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?
  • Conclusion: What purpose?How important are the ACID properties?What security measures?Scalability? Availability?
  • Conclusion: How fast?What is the Learning curve?How is the Testing?How is the Error Handling?
  • 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.
  • References● webservice-protocol/●● - caching SOAP services on client side●●● http://www.25hoursaday. com/weblog/2005/03/17/ETech2005TripReportBuildingANewWebServiceA tGoogle.aspx
  • ImagesAll of the following images have creative common rights:● - stock market● - handshake● - networks● - clock● - snail● - pc● - darth vader