2. API s

3. “ An application programming interface ( API ) is a set of functions, procedures, methods or classes that an operating system, library or service provides to support requests made by computer programs. [1] ” “ Web services are frequently just Web APIs that can be accessed over a network, such as the Internet , and executed on a remote system hosting the requested services. ”

4. Resources — Commands are defined in simple terms: resources to be retrieved, stored / get, set Nouns — Exchanging resources and concepts Commands — Commands are defined in methods with varying complexity: depending on “standard” Verbs — Exchanging methods RPC vs. REST

5. RPC vs. REST http://example.com/users/ http://example.com/users/{user} http://example.com/findUserForm http://example.com/locations/ http://example.com/locations/{location} http://example.com/findLocationForm ... getUser() addUser() removeUser() updateUser() getLocation() addLocation() removeLocation() updateLocation() listUsers() listLocations() findLocation() findUser() ...

6. Most web services use RESTful APIs! ... or at least “ accidently RESTful ”

7. RSS Atom PHP ... JSON jsonFlickrApi({ &quot;stat&quot;: &quot;ok&quot;, &quot;blogs&quot;: { &quot;blog&quot;: [ { &quot;id&quot; : &quot;73&quot;, &quot;name&quot; : &quot;Bloxus test&quot;, &quot;needspassword&quot; : &quot;0&quot;, &quot;url&quot; : &quot;http://remote.bloxus.com/&quot; }, ] } }) XML <blogs> <blog id=&quot;73&quot; name=&quot;Bloxus test&quot; needspassword=&quot;0&quot; url=&quot;http://remote.bloxus.com/&quot; /> </blogs>

8. Mashup!

10. Case Study http://code.uberVU.com/ureact WordPress Plugin

11. Exercise! Widget