Advanced JavaScript - Creating modern web applications

Transcript

1. Advanced JavaScript Creating Modern Web Applications @BastianHofmann

2. Wtf?

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12. • JavaScript Apps • CORS and OAuth2 • Local Storage

    • OEmbed and Caja • WebSockets, ActivityStrea.ms and PubsubHubbub • What‘s next?
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21. Questions? Ask!

22. http://speakerdeck.com/u/bastianhofmann

23. Let‘s write a JS App

24. https://github.com/bashofmann/statusnet_js_mashup_2nd

25. https://github.com/bashofmann/vm_js_mashup

26. CSS Bastian

27. http://twitter.github.com/bootstrap

28. History & Bookmarking

29. www.example.com#Page

30. www.example.com/Page

31. http://sammyjs.org/

32. API Access

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34. Same Origin Policy

35. Cross-Origin Resource Sharing Backend api.twitter.com Client client.net AJAX Access-Control-Allow-Origin: *

    http://www.w3.org/TR/cors/

36. var html="<ul>"; for (var i=0; i < viewers.length; i++) {

    html += "<li>" + viewers[i].displayName + "</li>"; } html += "<ul>"; document.getElementById("#div").innerHTML = html; Where is the error?

37. Templates

38. Mustache.JS https://github.com/janl/mustache.js }

39. var app = Sammy('#main', function() { var feed = [];

    this.use(Mustache, 'ms'); this.get('/', function() { this.trigger('getFeed'); }); ... }); jQuery(function() { app.run(); });

40. this.bind('getFeed', function() { var that = this; $.ajax({ url: 'http://..._timeline.json',

    success: function(response) { feed = response; that.trigger('renderFeed'); } }); }); this.bind('renderFeed', function() { this.feed = feed; this.partial('js/templates/feed.ms'); });

41. <ul> {{#feed}} <li> <p>{{{statusnet_html}}}</p> <p>{{created_at}} {{#user}} {{name}} {{/user}} </p> </li>

    {{/feed}} </ul>

42. Authorization

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44. http://oauth.net/

45. User-Agent Profile

46. http://twitter.com/authorize?&clientId=... Open Popup lanyrd.com

47. http://twitter.com/authorize?&clientId=... Open Popup lanyrd.com HTTPS GET twitter.co m/ authorize

48. http://twitter.com/authorize?&clientId=... Open Popup lanyrd.com Login twitter.co m/ authorize

49. http://twitter.com/authorize?&clientId=... Open Popup lanyrd.com Grant Permission twitter.co m/ authorize

50. lanyrd.com HTTPS Redirect RedirectURI# accessToken twitter.co m/ authorize RedirectURI# accessToken

    lanyrd.com

51. lanyrd.com RedirectURI# accessToken Parse Access Token from Fragment Send it

    to opening window Close popup lanyrd.com

52. Same Origin Policy

53. lanyrd.com HTTPS Ajax Request to API Access Token twitter.com

54. Storing the access token

55. Local Storage http://www.w3.org/TR/webstorage/

56. this.around(function(callback) { ... if (! oauth2.isLoggedIn()) { this.redirect('/Login'); return; }

    callback(); });

57. this.get('/Login', function() { this.partial('login.ms'); });

58. <form action="/Login" method="post"> <input type="submit" value="Login"/> </form>

59. this.post('/Login', function() { var consumerKey = 'abc....'; window.open('http://status.net/api/oauth2/ authorize?response_toke=token&client_id=' +

    consumerKey); });

60. <script type="text/javascript"> var fragment = location.hash.substr(1); opener.parent.oauth2.storeToken(fragment); window.close(); </script>

61. <form action="/Feed" method="post"> <textarea name="status"></textarea> <inputtype="submit" value="send"/> </form>

62. this.post('/Entry', function() { var that = this; $.ajax({ url: 'http://status.net/.../

    update.json?oauth_token=' + oauth2.store['access_token'], type: 'POST', data: { 'status': that.params['status'] }, success: function() { that.redirect('/'); } }); });

63. DEMO

64. Mash it up!

65. cool video: http://www.youtube.com/ watch?v=OFzkTxiwziQ

66. OEmbed http://oembed.com/

67. http://www.youtube.com/watch?v=OyJd2qsRkNk

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69. http://www.youtube.com/oembed?url=http%3A%2F %2Fwww.youtube.com%2Fwatch%3Fv %3DOyJd2qsRkNk&maxwidth=500&format=json

70. { "provider_url":"http:\/\/www.youtube.com\/", "title":"Jupiter Jones - Das Jahr in dem ich

    schlief (Musik Video)", "html":"\u003cobject width=\"500\" height=\"306\"\u003e \u003cparam name=\"movie\" value=\"http:\/\/www.youtube.com\/v\/ OyJd2qsRkNk?version=3\"\u003e\u003c\/param\u003e\u003cparam name= \"allowFullScreen\" value=\"true\"\u003e\u003c\/param\u003e \u003cparam name=\"allowscriptaccess\" value=\"always\"\u003e \u003c\/param\u003e\u003cembed src=\"http:\/\/www.youtube.com\/v\/ OyJd2qsRkNk?version=3\" type=\"application\/x-shockwave-flash \" width=\"500\" height=\"306\" allowscriptaccess=\"always \" allowfullscreen=\"true\"\u003e\u003c\/embed\u003e\u003c\/object \u003e", "author_name":"St182", "height":306, "thumbnail_width":480, "width":500, "version":"1.0", "author_url":"http:\/\/www.youtube.com\/user\/Stinkfist182", "provider_name":"YouTube", "thumbnail_url":"http:\/\/i4.ytimg.com\/vi\/OyJd2qsRkNk\/ hqdefault.jpg", "type":"video", "thumbnail_height":360 }

71. cool video:

72. http://embed.ly/

73. this.bind('changed', function() { embeds = []; $('div.feed-item h3').embedly({ key:'...', maxWidth:

    450, wmode: 'transparent', method: 'after' }); });
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75. Caja http://code.google.com/p/google-caja/

76. html_sanitize(result.html);

77. DEMO

78. Instant updates without reloading

79. PubSubHubbub retrieves Atom feed with Hub URL Hub posts sth

    pings every subscriber subscribes for feed acks subscription http://code.google.com/p/pubsubhubbub/

80. <link rel="alternate"href="http:// status.net.xyz:8061/index.php/api/statuses/ user_timeline/3.atom"type="application/atom +xml" title="Notice feed for bastian (Atom)"/>

81. <entry> <activity:object-type>http://activitystrea.ms/schema/1.0/ note</activity:object-type> <id>http://status.net.xyz:8061/index.php/notice/20</id> <title>hello from client</title> <content type="html">hello from

    client</content> <link rel="alternate" type="text/html" href="http:// status.net.xyz:8061/index.php/notice/20"/> <activity:verb>http://activitystrea.ms/schema/1.0/post</ activity:verb> <published>2011-05-23T21:07:33+00:00</published> <updated>2011-05-23T21:07:33+00:00</updated> <link rel="ostatus:conversation" href="http://status.net.xyz: 8061/index.php/conversation/20"/> <georss:point>52.52437 13.41053</georss:point> <link rel="self" type="application/atom+xml"href="http:// status.net.xyz:8061/index.php/api/statuses/show/20.atom"/> <link rel="edit" type="application/atom+xml"href="http:// status.net.xyz:8061/index.php/api/statuses/show/20.atom"/> <statusnet:notice_info local_id="20" source="api" favorite="false"repeated="false"></statusnet:notice_info> </entry>

82. http://activitystrea.ms/

83. <link href="http://status.net.xyz:8061/ index.php/main/push/hub" rel="hub"/>

84. PubSubHubbub retrieves Atom feed with Hub URL Hub posts sth

    pings every subscriber subscribes for feed acks subscription http://code.google.com/p/pubsubhubbub/

85. http://nodejs.org/

86. HTTP Server for PubsubHubbub

87. WebSockets http://dev.w3.org/html5/websockets/

88. socket.io http://socket.io/

89. (Webkit) Browser Notifications

90. retrieve Stream with Hub Ajax: request Subscription WebSockets: new Post

    subscribe at hub challenge ack new post Notification new post

91. DEMO

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93. Meteor http://www.meteor.com

94. https://github.com/bashofmann/meteor_shoutbox_demo

95. DEMO

96. h"p://twi"er.com/Bas2anHofmann h"p://profiles.google.com/bashofmann h"p://lanyrd.com/people/Bas2anHofmann h"p://speakerdeck.com/u/bas2anhofmann h"ps://github.com/bashofmann [email protected]