Introduction to Google APIs
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http://barcampbangalore.org/bcb/bcb12/google-apis-and-google-app-engine-introduction-demo
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Introduction to Google APIs
- 1. Introduction to Google APIs August 25, 2012 Sivasubramaniam Arunachalam http://barcampbangalore.org/bcb/bcb12/google-apis-and-google-app-engine-introduction-demo
- 3. Agenda • What is an API? • REST - Introduction • Google APIs • Demo
- 4. API “Specification intended to be used as an interface by software components to communicate with each other”
- 5. Language Dependent APIs • Python (pydoc) • Ruby (ri) • Perl (perldoc) • Java (javadoc) • Unix (man)
- 6. Language Independent APIs • RPCs • CORBA • Web Services
- 7. Evolution • Web 2.0 & 3.0 • Web Services "A software system designed to support interoperable machine-to-machine interaction over a network" (W3C)
- 8. Web APIs • HTTP, HTTP & HTTP • XML • JSON • Mash-ups • Enterprise • Consumer • Data
- 9. Web Services • SOAP • Heavy Weight • Suitable for Enterprises • REST • Light Weight • Suitable for Web APIs
- 10. Why REST? • Ease of Development & Deployment • Serves the actual purpose of HTTP • Cache Proxies • Human readable results • Flexile Formats • Better Performance • Better Browser Support • Social Media Authentication
- 11. REST - Introduction • Architectural Style • Uses only HTTP • Stateless • Clean URL (Slugs & SEO)
- 12. REST - Components • Origin Servers • Gateways • Proxies • Clients • Client (Requested By) • Server (Provided By) • Resource (What is being exchanged) • Representation
- 13. REST - Methods • GET • PUT • POST • DELETE http://provider.com/resources/ http://provider.com/resources/entry05
- 14. REST – Methods (GET) http://provider.com/resources/ http://provider.com/resources/entry05 •List •Retrieve
- 15. REST – Methods (PUT & POST) http://provider.com/resources/ http://provider.com/resources/entry05 •Replace •Replace/Create
- 16. REST – Methods (DELETE) http://provider.com/resources/ http://provider.com/resources/entry05 •Delete the List •Delete the Entry
- 17. PUT vs POST • Explicit URL Name in request (PUT) • Idempotent (PUT) • No Duplicate • PUT - Same URL for (Create/Update)
- 18. PUT • /resources/<existing_resource> (update) • /resources/<new_resource> (Create)
- 19. POST • /resources (Create and URL will be returned) • /resources/<existing_resource> (Update) • /resources/<new_resource> (Error)
- 20. OAuth 2.0 Flow http://tutorials.jenkov.com/oauth2/overview.html
- 21. OAuth 2.0 Flow (Contd…) http://www.ibm.com/developerworks/library/x-androidfacebookapi/index.html
- 22. Google APIs • Data APIs (Demo in few minutes) • Ajax APIs • JS & HTML • Rich dynamic web sites • Ads APIs • Adsense • Adwords • (SOAP Based)
- 23. Google Data APIs • 46 Apps • Tools • API Explorer • API Console • OAuth 2.0 Playground
- 24. Demo • Discovery • Books • URL Shorter • Tasks • Google + • Others
- 25. Questions (?)
- 26. Thank You! siva@sivaa.in @sivaa_in
- 27. References • http://en.wikipedia.org/wiki/Application_programming_interface • http://en.wikipedia.org/wiki/Representational_state_transfer • http://en.wikipedia.org/wiki/Google_Code • http://googlecode.blogspot.in/2009/08/well-earned-retirement-for-soap-search.html • http://stackoverflow.com/questions/6166746/why-use-soap-for-webservices • http://stackoverflow.com/questions/630453/put-vs-post-in-rest • http://stackoverflow.com/questions/3487991/why-does-oauth-v2-have-both-access-and-refresh-tokens
- 29. Tweets
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