SOAP vs REST
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This document compares SOAP and REST web services. SOAP uses XML and relies on complex specifications, while REST uses simple HTTP requests and aims to be lightweight. REST has advantages for simplicity, bandwidth usage, caching and statelessness. SOAP may be better for complex transactions that require ACID properties and reliable messaging. Factors like security requirements, scalability, and programming language support also influence the choice of protocol.
SOAP vs REST
- 1. SOAP vs REST Presentation by Mario Almeida
- 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. What is a Webservice? "Software system designed to support interoperable machine-to-machine interaction over a network" - W3C
- 4. Services interoperability! Systems interact with the web service using messages sent through HTTP generally with an XML serialization.
- 5. What is SOAP? Simple Object Access Protocol
- 6. What is REST? Representational State Transfer
- 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 Amazon's 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. Characteristics: Simplicity REST: ● 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. 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. 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. Characteristics: Caching! Caching? ● take advantage of all the caching infrastructure that is built into the Web infrastructure.
- 12. Characteristics: State! Session State is Evil! (SOAP) ● Enormous impact on scalability and avalability.
- 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. Conclusion: What purpose? How important are the ACID properties? What security measures? Scalability? Availability?
- 15. Conclusion: How fast? What is the Learning curve? How is the Testing? How is the Error Handling?
- 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. 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. Images All 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