CS520 Web Programming RSS and Atom Feeds Amazon.com - DVD http://www.amazon.com/exec/... Up-to-date listings of Amazon.com's top items (by Sales Rank). Chengyu Sun http://www.amazon.com/exec/obidos/subst/xs/syndicate.html California State University, Los Angeles Batman Begins (Two-Disc Deluxe Edition)Batman Begins (Two-Disc Deluxe Edition) -- $19.98 http://www.amazon.com/exec/... ...
Feed Examples The Need for Feeds
Yahoo! News feeds - Content syndication http://news.yahoo.com/rss A standard way to publish information Google Feed Reader – that changes on a regular basis
http://www.google.com/reader Taking advantage of the popularity and availability of feed readers/aggregators
A Little History of RSS A Little History of Atom
RSS-DEV Netscape UserLand Started by Sam Ruby on a wiki in 2003 Working Group 0.90 Pie, Echo, Necho, Atom
0.91 0.91 Atom 0.3 is widely adopted 1.0 0.92 Atom 1.0 is now an IETF standard
0.93 Rich Site Summary (0.91) RDF Site Summary (0.9,1.0) 0.94 Really Simple Syndication (2.0) 2.0
1 Required Sub- RSS 2.0 Elements
RSS 2.0 Specification -
http://blogs.law.harvard.edu/tech/rss <link> <rss version=“2.0”> <description> <channel></p><p>Optional <Channel> Sub- Elements Element Formats</p><p><language> <docs> Contact info elements <copyright> <cloud> <a href="/tags/Email/" rel="tag">Email</a> (FirstName LastName) <managingEditor> <ttl> E.g. <webMaster>csun@calstatela.edu (Chengyu Sun)</webMaster> <webMaster> <image> Date elements <pubDate> <rating> RFC 822-style</p><p><lastBuildDate> <textInput> E.g <lastBuildDate>Sun, 12 Sep 2004 <category> <skipHours> 19:01:55 GMT</lastBuildDate> <generator> <skipDays></p><p><item> RSS Modules</p><p><title> <category> Extensions of the core specification <link> <comments> using XML Namespace <description> <enclosure> <rss version="2.0" xmlns:media=“http://tools.search.yahoo.com/mrss/”> <author> <guid> … <item> <pubDate> <source> … <media:content> <media:url>http://cs.calstatela.edu/video.mpg</media:url> <media:fileSize>2000000</media:fileSize> <media:type>video/mpeg</media:type> </media:content> …</p><p>2 XML Namespace Atom Syndication Format</p><p>Resolve conflicting element names http://www.ietf.org/rfc/rfc4287 E.g. <computing:windows> and <?xml version="1.0" encoding="utf-8"?> <building:windows> <feed xmlns="http://www.w3.org/2005/Atom"> <title>Example Feed Namespace declaration John Doe xmlns:prefix =“ URI ” [email protected] E.g. urn:uuid:60a76c80-d399-11d9-b91C-0003939e0af6 xmlns:media=http://tools.search.yahoo.co Atom-Powered Robots Run Amok m/mrss/ 2003-12-13T18:30:02Z URI has to be unique Some text.
Reusable Syntax of Constructs ROME
Text http://wiki.java.net/bin/view/Javawsxml Person /Rome
,, A Java library for producing and Date, Service, Link, Category consuming RSS and Atom feeds Identity Support all versions of RSS and Atom
Usually a URI
Package Structure Feed in Evelyn
Interface and a general implementation Feeder interface and FeedInfo com.sun.syndication.io evelyn.feed.rome.FeederImpl com.sun.syndication.feed com.sun.syndication.feed.synd Spring beans configuration Specific implementations com.sun.syndication.feed.rss com.sun.syndication.feed.atom Modules and Extensions com.sun.syndication.feed.module
3 Publish Your Feeds – Auto Publish Your Feeds – MIME Discovery Links Types
