1. With jQuery and AJAX Doncho Minkov Telerik Corporation www.telerik.com Technical Trainer

2.  RESTful Web Services  XML, JSON, RSS  Consuming REST with jQuery  Consuming Twitter REST with jQuery  Twitter @Anywhere  Twitter @Anywhere Features  Facebook API

3. Lightweight Architecture for Web Services

4. "Representational state transfer (REST) is a style of software architecture for distributed hypermedia systems such as the World Wide Web." http://en.wikipedia.org/wiki/Representational_State_Transfer  Application state and functionality are resources  Every resource has an URI  All resources share a uniform interface  This natively maps to the HTTP protocol

5.  One URI for a resource, multiple operations  Add a new document "RestTalk" in category "Code"  PUT http://mysite.com/docs/Code/RestTalk http://mysite.com/docs/Code/RestTalk  Get the document / some page  GET http://mysite.com/docs/Code/RestTalk http://mysite.com/docs/Code/RestTalk  GET http://mysite.com/docs/Code/RestTalk/pages/3 http://mysite.com/docs/Code/RestTalk/pages/3  Remove the document  DELETE http://mysite.com/docs/Code/RestTalk http://mysite.com/docs/Code/RestTalk  Retrieve metadata  HEAD http://mysite.com/docs/Code/RestTalk http://mysite.com/docs/Code/RestTalk 5

6. Comparing the Common Service Data Formats

7.  XML is markup-language for encoding documents in machine-readable form  Text-based format  Consists of tags, attributes and content  Provide data and meta-data in the same time 7 <library> HTML 5 Bay Ivan HTML 5 Bay Ivan WPF 4 Microsoft WPF 4 Microsoft WCF 4 Kaka Mara WCF 4 Kaka Mara UML 2.0 Bay Ali UML 2.0 Bay Ali </library>

8.  JSON (JavaScript Object Notation)  Standard for representing simple data structures and associative arrays  Lightweight text-based open standard  Derived from the JavaScript language 8 { "firstName": "John", "lastName": "Smith", "age": 25, "firstName": "John", "lastName": "Smith", "age": 25, "address": { "streetAddress": "33 Alex. Malinov Blvd.", "address": { "streetAddress": "33 Alex. Malinov Blvd.", "city": "Sofia", "postalCode": "10021" }, "city": "Sofia", "postalCode": "10021" }, "phoneNumber": [{ "type": "home", "number": "212 555-1234"}, "phoneNumber": [{ "type": "home", "number": "212 555-1234"}, { "type": "fax", "number": "646 555-4567" }] { "type": "fax", "number": "646 555-4567" }]}, { "firstName": "Bay", "lastName": "Ivan", "age": 79 }

9.  RSS (Really Simple Syndication)  Family of Web feed formats for publishing frequently updated works  E.g. blog entries, news headlines, videos, etc.  Based on XML, with standardized XSD schema  RSS documents (feeds) are list of items  Each containing title, author, publish date, summarized text, and metadata  Atom protocol aimed to enhance / replace RSS 9

10. 10 <channel> W3Schools Home Page W3Schools Home Page http://www.w3schools.com http://www.w3schools.com Free web building tutorials Free web building tutorials RSS Tutorial RSS Tutorial http://www.w3schools.com/rss http://www.w3schools.com/rss New RSS tutorial on W3Schools New RSS tutorial on W3Schools XML Tutorial XML Tutorial http://www.w3schools.com/xml http://www.w3schools.com/xml New XML tutorial on W3Schools New XML tutorial on W3Schools </channel></rss>

11. How To Make It Work?

12.  Can be done with three methods  $.ajax(…)  $.get(…)  $.post(…)  $.get(…) and $.post(…) use $.ajax(…) under the hood  These methods load data from the server  Using rest service  Return JSON, Atom, RSS

13. $.ajax({ url: "RestService.svc/students/all", type: "GET", timeout: 5000, dataType: "json", success: function (students) { $('#loadStudentsButton').html("students loaded"); $('#loadStudentsButton').html("students loaded"); // do something with the students data // visualize them, etc… } error: function (err) { error: function (err) { $('#loadStudentsButton').html("error: " + err.status); $('#loadStudentsButton').html("error: " + err.status); }}); The path of the REST Service (should be on the same server) Request type ('GET' or 'POST') The type of data to expect(JSON,XML) In case the request is successful In case the request is unsuccessful  Example of jQuery.ajax(…) get request

14. $.ajax({ url: "RestService.svc/students/new", type: "POST", timeout: 5000, contentType: "application/json", data: JSON.stringify(student), success: function () { $('#createStudentButton').html("student created"); //reload the students }, error: function (err) { $('#createStudentButton').html("error: " + err.status); }}); The type of data to sent to the server (JSON, XML) We have a student object (in JSON) and should make it readable for the server  Example of jQuery.ajax(…) post request

15. Live Demo

16. Lets Make Our Own Twitter?

17.  First lets get familiar with the Twitter REST API  We are given a set of methods to  Get a number of tweets for a given user  Post a tweet using jQuery  Search tweets  Etc…  First need to register a twitter app

18.  Registering a Twitter App  Go to http://dev.twitter.com http://dev.twitter.com  Register a App  When your app is registered you get:  Consumer key  The key your app authorizes with  Consumer secret  Used for user authentication

19.  GET statuses/user_timeline  Returns the 20 most recent statuses posted by the authenticating user  It is also possible to request another user's timeline by using  The screen_name or user_id parameter  The other users timeline will only be visible if they are not protected  If the authenticating user's follow request was

20. $.ajax({ url : https://twitter.com/statuses/user_timeline/"+ user+".json?callback=?" dataType : "json", timeout:5000, success : function(data) { //Visualize Tweets }, error : function() { //Visualize Errors //Visualize Errors},});  Getting Tweets from Twitter with jQuery

21. Live Demo

22. How To Make It Easy?

23.  What is Twitter @Anywhere?  An easy-to-deploy solution  Bringing the Twitter communication platform  Promotes a more engaged user base  Can be used to add  Follow Buttons, Hovercards, linkify Twitter usernames  Build integrations with "Connect to Twitter"

24.  With a registered App at dev.twitter.com dev.twitter.com  You get a AppId  In the head part of the app include  With anywhere.js included  A twttr object and an anywhere function  Used to make the magic with anywhere

25. Live Demos

26. new TWTR.Widget({ version: 2, type: 'search', search:, interval: 300, version: 2, type: 'search', search:, interval: 300, title: 'It\'s a double rainbow', subject: 'Across the sky', title: 'It\'s a double rainbow', subject: 'Across the sky', width: 250, height: 300, width: 250, height: 300, theme: { theme: { shell: {background:'# 70fd90 ',color: '# 000000 '}, shell: {background:'# 70fd90 ',color: '# 000000 '}, tweets: {background: '# c6fec7 ', color: '# 444444 ', links: '# 1985b5 '} tweets: {background: '# c6fec7 ', color: '# 444444 ', links: '# 1985b5 '}}, features: { scrollbar: true, loop: true, live: true, behavior: 'default' }}).render().start();

27. new TWTR.Widget({ version: 2, type: 'profile', search:, interval: 300, version: 2, type: 'profile', search:, interval: 300, title: 'It\'s a double rainbow', subject: 'Across the sky', title: 'It\'s a double rainbow', subject: 'Across the sky', width: 250, height: 300, width: 250, height: 300, theme: { theme: { shell: {background:'# 70fd90 ',color: '# 000000 '}, shell: {background:'# 70fd90 ',color: '# 000000 '}, tweets: {background: '# c6fec7 ', color: '# 444444 ', links: '# 1985b5 '} tweets: {background: '# c6fec7 ', color: '# 444444 ', links: '# 1985b5 '}}, features: { scrollbar: true, loop: true, live: true, behavior: 'default' }}).render().start();

28. Live Demo

29. Login/Logout, Tweet, etc.

30. twttr.anywhere(function (T) { T("#login").connectButton({ authComplete: function(user) { authComplete: function(user) { //something to do after authentication }, },});});  Login: function logOut() { twttr.anywhere.signOut(); twttr.anywhere.signOut(); }  Logout

31. Live Demo

32.  Tweet Box twttr.anywhere(function (T) { T("#tbox").tweetBox(); T("#tbox").tweetBox();});  Follow Button twttr.anywhere(function (T) { T('#follow-donchominkov').followButton("donchominkov"); T('#follow-donchominkov').followButton("donchominkov");});

33. Live Demo

34. Lets Play a Little with Facebook

35.  Facebook provides a SDK for JavaScript  To use the functionality of Facebook  Should register an app  Through phone number  With credit card  Absolutely free  Made for precautions

36. Live Demo

37. Questions?