Getting Started with Web Services
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The document provides an overview of web services, including their definition, message formats like XML and JSON, and standards such as SOAP and REST. It explains how web services facilitate communication between devices, create reusable components, and highlights development and testing tools. Additionally, it covers real-world use cases and security measures necessary for implementing web services.
![22
• Plain Text
John
Doe
Anna
Smith
Peter
Jones
• JSON Document
{
"employees":
[
{"firstName":"John",
"lastName":"Doe"},
{"firstName":"Anna",
"lastName":"Smith"},
{"firstName":"Peter",
"lastName":"Jones"}
]
}
JSON Overview](https://image.slidesharecdn.com/ast-gettingstartedwithwebservices-150604151228-lva1-app6892/85/Getting-Started-with-Web-Services-22-320.jpg)
![23
• JSON syntax is derived from
JavaScript object notation
syntax:
• Data is in name/value pairs
• Data is separated by commas
• Curly braces hold objects
• Square brackets hold arrays
• JSON Document
{
"employees":
[
{"firstName":"John",
"lastName":"Doe" },
{"firstName":"Anna",
"lastName":"Smith"},
{"firstName":"Peter",
"lastName":"Jones"}
]
}
JSON Syntax](https://image.slidesharecdn.com/ast-gettingstartedwithwebservices-150604151228-lva1-app6892/85/Getting-Started-with-Web-Services-23-320.jpg)
Getting Started with Web Services
- 1. ASTCORPORATION RECOGNIZED.SPECIALIZED. PREFERRED. Getting Started with Web Services Zeeshan Baig 05/8/2015
- 2. 2 • Over 15 years of Experience with Oracle Products • Working at AST Middleware practice for about 3 years • Oracle ACE • Blog: www.baigzeeshan.com • Twitter: @baigsorcl • LinkedIn: www.linkedin.com/in/baigzeeshan About Me
- 3. 3 What is a Web Service? Web Services Message Formats Web Services Standards How to Create Web Services Testing Tools Security Q & A Disclaimer: All Images used in presentation are property of respected owners and used for educational purpose only Agenda
- 4. 4 Quote
- 5. 5 What is a Web Service?
- 6. 6 In Simple words “A Framework for a conversation between 2 devices” What is a Web Service?
- 7. 7 • Communicate using open protocols • Uses specific Message Format • Hides complexities between devices What Web Services do?
- 8. 8 • Service Provider – Provides Services to rest of the world – Could provide data in different formats • Requestor – Requestor will be aware of type of web service – Don’t need to know complexities behind Service How it works?
- 9. 9 Examples of Web Services
- 10. 10 Yahoo Weather API • https://developer.yahoo.com/weather/ Examples of Web Services - 1
- 11. 11 Flight Aware • http://flightaware.com/commercial/flightxml/ Examples of Web Services - 2
- 12. 12 OANDA Currency Exchange • https://www.oanda.com/rates/test-drive Examples of Web Services - 3
- 13. 13 • Integrate with other systems • Create Reusable components • Publish functions and messages to rest of the world • Your Java based application can send data to your .NET application • EBS system data can be leverage by Cloud based applications Benefits of using Web Service
- 14. 14 Demo Public Web Services
- 16. 16 • XML • JSON Message Formats
- 17. 17 • XML stands for Extensible Markup Language. • XML was designed to describe data. • XML is a software- and hardware-independent tool for carrying information • Learn more about XML at – http://www.w3schools.com/xml/ XML Overview
- 18. 18 • Plain Text John Doe Anna Smith Peter Jones • XML Document <employees> <employee> <firstName>John</firstName> <lastName>Doe</lastName> </employee> <employee> <firstName>Anna</firstName> <lastName>Smith</lastName> </employee> <employee> <firstName>Peter</firstName> <lastName>Jones</lastName> </employee> </employees> XML Overview
- 19. 19 • Syntax rules of XML are very simple and logical • All XML Elements Must Have a Closing Tag </> • XML Tags are Case Sensitive • XML Documents Must Have a Root Element <employees> • Data resides under elements tags • XML Document <employees> <employee> <firstName>John</firstName> <lastName>Doe</lastName> </employee> <employee> <firstName>Anna</firstName> <lastName>Smith</lastName> </employee> <employee> <firstName>Peter</firstName> <lastName>Jones</lastName> </employee> </employees> XML Syntax
- 20. 20 XML Overview
- 21. 21 • JSON: JavaScript Object Notation. • Lightweight • Transportation Independent • JSON is an easier-to-use alternative to XML. • JSON is "self-describing" and easy to understand. • Learn more about JSON at – http://www.w3schools.com/json JSON Overview
- 22. 22 • Plain Text John Doe Anna Smith Peter Jones • JSON Document { "employees": [ {"firstName":"John", "lastName":"Doe"}, {"firstName":"Anna", "lastName":"Smith"}, {"firstName":"Peter", "lastName":"Jones"} ] } JSON Overview
- 23. 23 • JSON syntax is derived from JavaScript object notation syntax: • Data is in name/value pairs • Data is separated by commas • Curly braces hold objects • Square brackets hold arrays • JSON Document { "employees": [ {"firstName":"John", "lastName":"Doe" }, {"firstName":"Anna", "lastName":"Smith"}, {"firstName":"Peter", "lastName":"Jones"} ] } JSON Syntax
- 25. 25 •SOAP •REST Web Services Standards
- 26. 26 • SOAP – Simple Object Access Protocol – Relies on XML message Format – Requires WSDL Document – Requires Contract – Enterprise Standard Types of Web Services
- 27. 27 • REST – Representational State Transfer – HTTP Bases verbs – GET, PUT, POST, DELETE – Simple familiar – Programmer friendly – No Contract – Mobile Types of Web Services
- 28. 28 SOAP vs REST - 1
- 29. 29 SOAP vs REST - 2
- 30. 30 Tools
- 31. 31 • Any Development Tool to build Web Services – JDeveloper – Eclipse – Microsoft Visual Studio • SOAP UI for testing • REST Console (Chrome Extension) • Web Browser • Oracle HTTP Analyzer • Oracle Enterprise Manager Tools
- 32. 32 • Inbound and Outbound data from Cloud based application to on premise apps • Resolve Compatibility issues for example legacy java application to use modern feature • Payment gateways (Visa, MasterCard) • Schedule of data movement from .NET application to SOA based application Real world Use Cases
- 33. 33 1. Create XML Schema 2. Create WSDL Document 3. Implement Logic 4. Deploy Web Service to server 5. Create Proxy client 6. Call it using Proxy client Creating SOAP Based Web Services
- 34. 34 Creating SOAP Based Service
- 35. 35 1. Create Implementation Logic 2. Add Jersey Libraries to Project 3. Add REST annotations 4. Deploy 5. Call Creating REST Web Services
- 36. 36 Creating REST based services
- 37. 37 Testing Tools
- 38. 38 Testing Web Services using SOAP UI
- 39. 39 Security
- 40. 40 • Enable Encryption - lets the traffic go in a non-human readable format (SSL) • Enable Authentication – Allows to pass user name and password with every request • API Keys - String that's issued to a developer by a web service provider that the developer then includes in their web service requests. • Security Tokens - may be a physical device that an authorized user of computer services is given to ease authentication Web Service Security
- 41. 41 • Know we are familiar with Web Services • Web Services is a framework to communicate between 2 devices • We know XML and JSON message Formats • SOAP and REST are main standards • Difference between SOAP and REST • Tools to develop and test Services • Real world examples Summary