Mashing up JavaScriptAdvanced techniques for modern web applications
Bastian Hofmann / VZnet Netzwerke Ltd.
Wtf?
• JavaScript Apps
• CORS and OAuth2
• Local Storage
• OEmbed and Caja
• WebSockets, ActivityStrea.ms and PubsubHubbub
• OpenSocial
You?
Questions? Ask!
https://github.com/bashofmann/statusnet_js_mashup
Let‘s write a JS App
Don‘t reinvent the wheel!
Open Source
}
Open Standards
DEMO
History & Bookmarking
DEMO
API Access
Same Origin Policy
Cross-Origin Resource Sharing
Backendapi.twitter.com
Client client.net
AJAX
Access-Control-Allow-Origin: *
http://www.w3.org/TR/cors/
DEMO
var html="<ul>";for (var i=0; i < viewers.length; i++) { html += "<li>" + viewers[i].displayName + "</li>";}html += "<ul>";document.getElementById("#div").innerHTML = html;
Templates
Mustache.JS
https://github.com/janl/mustache.js
}
DEMO
Authorization
+----------+ Client Identifier +----------------+ | |>---(A)-- & Redirection URI --->| | | | | | End <--+ - - - +----(B)-- User authenticates -->| Authorization | User | | | Server | | |<---(C)--- Redirect URI -------<| | | Client | with Access Token | | | in | in Fragment +----------------+ | Browser | | | +----------------+ | |>---(D)--- Redirect URI ------->| | | | without Fragment | Web Server | | | | with Client | | (F) |<---(E)--- Web Page with ------<| Resource | | Access | Script | | | Token | +----------------+ +----------+
User-Agent Profile
DEMO
Storing the access token
Cookie
Problem: Cookie is also sent to the backend
Local Storage
http://www.w3.org/TR/webstorage/
DEMO
Mash it up!
cool video:http://www.youtube.com/watch?v=OFzkTxiwziQ
OEmbed• Retrieves embeddable content for a given link
http://www.flickr.com/services/oembed/?url=http%3A//www.flickr.com/photos/bees/2341623661/
{ "version": "1.0", "type": "photo", "width": 240, "height": 160, "title": "ZB8T0193", "url": "http://farm4.static.flickr.com/3123/2341623661_7c99f48bbf_m.jpg", "author_name": "Bees", "author_url": "http://www.flickr.com/photos/bees/", "provider_name": "Flickr", "provider_url": "http://www.flickr.com/"}
http://oembed.com/
The embedded result
cool video:
OEmbed Aggregation
•embed.ly
•supports 218 services over one endpoint
•several libraries
•easy implementation
http://embed.ly/
DEMO
Caja
http://code.google.com/p/google-caja/
DEMO
Instant updates without reloading
<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>
<link href="http://status.net.xyz:8061/index.php/main/push/hub" rel="hub"/>
PubSubHubbubretrieves Atom feed with Hub URL
Hub
posts sthpings everysubscriber
subscribes for feed
ackssubscription
http://code.google.com/p/pubsubhubbub/
WebSockets
http://dev.w3.org/html5/websockets/
Browser Notifications
Tying it together
retrieve Stream with Hub
Ajax: request Subscription
WebSockets:new Post
subscribe at hubchallenge
acknew post
Notification
new post
DEMO
Including widgets
GADGETapivz.net
CONTAINERmeinvz.net
DEMO
h"p://twi"er.com/Bas2anHofmannh"p://studivz.net/bas2anh"p://slideshare.net/[email protected]"p://joind.in/talk/view/3506h"p://developer.studivz.net
Recommended
