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Mashing up JavaScript
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Bastian Hofmann
February 29, 2012
Programming
3
1.9k
Mashing up JavaScript
Advanced techniques for modern web applications
Slides from Confoo 2012
Bastian Hofmann
February 29, 2012
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Transcript
Mashing up JavaScript Bastian Hofmann Advanced techniques for modern web
applications
Wtf?
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• JavaScript Apps • CORS and OAuth2 • Local Storage
• OEmbed and Caja • WebSockets, ActivityStrea.ms and PubsubHubbub • OExchange
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http://slideshare.net/bashofmann
Questions? Ask!
Let‘s write a JS App
https://github.com/bashofmann/statusnet_js_mashup_2nd
CSS Bastian
http://twitter.github.com/bootstrap
History & Bookmarking
www.example.com#Page
www.example.com/Page
http://sammyjs.org/
API Access
None
Same Origin Policy
Cross-Origin Resource Sharing Backend api.twitter.com Client client.net AJAX Access-Control-Allow-Origin: *
http://www.w3.org/TR/cors/
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?
Templates
Mustache.JS https://github.com/janl/mustache.js }
DEMO
Authorization
None
http://oauth.net/
User-Agent Profile
http://twitter.com/authorize?&clientId=... Open Popup lanyrd.com
http://twitter.com/authorize?&clientId=... Open Popup lanyrd.com HTTPS GET twitter.co m/ authorize
http://twitter.com/authorize?&clientId=... Open Popup lanyrd.com Login twitter.co m/ authorize
http://twitter.com/authorize?&clientId=... Open Popup lanyrd.com Grant Permission twitter.co m/ authorize
lanyrd.com HTTPS Redirect RedirectURI# accessToken twitter.co m/ authorize RedirectURI# accessToken
lanyrd.com
lanyrd.com RedirectURI# accessToken Parse Access Token from Fragment Send it
to opening window Close popup lanyrd.com
Same Origin Policy
lanyrd.com HTTPS Ajax Request to API Access Token twitter.com
Storing the access token
Local Storage http://www.w3.org/TR/webstorage/
DEMO
Mash it up!
cool video: http://www.youtube.com/ watch?v=OFzkTxiwziQ
OEmbed http://oembed.com/
http://www.youtube.com/watch?v=OyJd2qsRkNk
None
http://www.youtube.com/oembed?url=http%3A%2F %2Fwww.youtube.com%2Fwatch%3Fv %3DOyJd2qsRkNk&maxwidth=500&format=json
{ "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 }
cool video:
http://embed.ly/
None
Caja http://code.google.com/p/google-caja/
DEMO
Instant updates without reloading
PubSubHubbub retrieves Atom feed with Hub URL Hub posts sth
pings every subscriber subscribes for feed acks subscription http://code.google.com/p/pubsubhubbub/
<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)"/>
<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>
http://activitystrea.ms/
<link href="http://status.net.xyz:8061/ index.php/main/push/hub" rel="hub"/>
PubSubHubbub retrieves Atom feed with Hub URL Hub posts sth
pings every subscriber subscribes for feed acks subscription http://code.google.com/p/pubsubhubbub/
http://nodejs.org/
WebSockets http://dev.w3.org/html5/websockets/
socket.io http://socket.io/
http://search.npmjs.org/#/socket.io
Browser Notifications
webkitNotifications.createNotification(image, title, text).show();
webkitNotifications.requestPermission();
retrieve Stream with Hub Ajax: request Subscription WebSockets: new Post
subscribe at hub challenge ack new post Notification new post
DEMO
Sharing
Nascar Problem
http://www.oexchange.org/
http://www.example.com/share.php?url={URI} &title={title for the content} &description={short description of the content}&ctype=flash&swfurl={SWF
URI} &height={preferred SWF height} &width={preferred swf width} &screenshot={screenshot URI}
http://example.com/.well- known/host-meta http://tools.ietf.org/html/draft-nottingham-site-meta
<?xml version='1.0' encoding='UTF-8'?> <XRD xmlns='http://docs.oasis-open.org/ns/xri/xrd-1.0' xmlns:hm='http://host-meta.net/xrd/1.0'> <hm:Host>www.meinvz.net</hm:Host> <Link rel="http://oexchange.org/spec/0.8/rel/resident-target" type="application/xrd+xml"
href="http://www.example.com/oexchange.xrd" > </Link> </XRD>
<?xml version='1.0' encoding='UTF-8'?> <XRD xmlns="http://docs.oasis-open.org/ns/xri/xrd-1.0"> <Subject>http://www.example.com/linkeater</Subject> <Property type="http://www.oexchange.org/spec/0.8/prop/vendor"> Examples Inc.</Property>
<Property type="http://www.oexchange.org/spec/0.8/prop/title"> A Link-Accepting Service</Property> <Link rel= "icon" href="http://www.example.com/favicon.ico" type="image/vnd.microsoft.icon" /> <Link rel= "http://www.oexchange.org/spec/0.8/rel/offer" href="http://www.example.com/linkeater/offer.php" type="text/html" /> </XRD>
http://search.npmjs.org/#/oexchange
DEMO
Mobile
Rate and Comment https://joind.in/4670
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