Lecture 10 - RSS Feeds.docx

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Western University
Computer Science
Computer Science 1033A/B
Vivi Tryphonopoulos

RSS Feeds 4/25/2013 5:29:00 PM Lecture 10 Ways of Accessing Information  The internet has exploded with the amount of websites and information that it contains o As of July 2011, there were an estimated 164 million blogs o Information on the internet changes very quickly, very often making it hard to keep track of it all  Conventional method of accessing information – visiting sites to see what's new o Problem with conventional access:  Information that you’re looking for is located across multiple sites  Time-consuming and cumbersome to access  Difficult to keep track of where the sites are  Don’t know if/when new information is posted o Solution:  Have information delivered directly to you – no need to access all of your favourite websites individually  Alternative method of accessing information – RSS technology o Get updates sent directly to you instead of finding them yourself RSS Feeds  RSS – Really Simple Syndication o Syndication – broadcasting internet content o RSS is a standardized file format written in XML (extensible mark-up Language) o A way of websites to get out up-to-date information o A way for users to get up-to-date information without having to visit the site o RSS feeds are also called RSS channels  How internet syndication is achieved using RSS: o Many news-related sites, weblogs and other online publishers syndicate their content as an RSS feed to whoever wants it o Webmasters create an RSS file containing headlines and descriptions of specific information  Developers can embed RSS feeds in their iPhone apps, Android apps and mobile web apps  How to create an RSS feed: o Create the RSS feed (.xml file)  Identify new articles  Basic parts of an .xml file:  indicate an xml file  Channel appears at the top of the file and tell people how the items relate to each other (title, link and description):  Title – written to describe the content  Description – written to describe the content  Link – the website that contains the content  RSS feeders (RSS generators) – a program that allows users to easily create XML files, edit and publish RSS feeds  Alternative to coding it yourself  Some can even create podcasts (including iTunes compatible podcasts) o Validate the RSS feed (for errors)  Many feed readers will not accept invalid blogs/sites so
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