- JAVA RSS FEED READER EXAMPLE HOW TO
- JAVA RSS FEED READER EXAMPLE CODE
- JAVA RSS FEED READER EXAMPLE FREE
Logically, you’ll want to ensure it conforms to this logical ordering, and so you will need to account for it within your script. Most RSS feeds are sorted according to descending date order (newest on top) however, occasionally you’ll encounter a feed that doesn’t comply. You’ll see output similar to that shown in the following screenshot.įigure 1: Converting the RSS feed to HTML.
JAVA RSS FEED READER EXAMPLE CODE
Just modify the previous code to look like this:Įxecute this revised script and then load the file that has been created (wjgilmore.html) into your browser. Fortunately, dumping the HTML to a file is easy. Instead, you’ll want to view the HTML in a browser. Viewing the transformed RSS in a terminal window doesn’t exactly improve your situation. Dumping the Transformed RSS to an HTML file This will result in the publication dates being formatted like this: March 05, 2008. One way to improve it is by using strftime, like so: For instance, the default date format is not very user-friendly.
JAVA RSS FEED READER EXAMPLE FREE
Of course, you’re free to apply liberal amounts of Ruby to the data before it’s output. I’m using Bill Eisenhauer’s awesome YM4R Rails I met local Rails guru Josh Schairbaum for lunch yesterday,Ĭontinuing the mini-series on Rails/YM4R and Google Maps, one ofĬhanging the default Google Maps API Icon To see this capability in action, add the following snippet to the end of the file:Įxecuting parserss.rb anew will produce the same output as before, in addition to output that looks like this:
Retrieving and displaying the various posts is just as easy. Save this file as parserss.rb and execute it from the command line: Rss = RSS::Parser.parse(rss_content, false) # Parse the feed, dumping its contents to rss The following script will do exactly this, retrieving my blog’s RSS feed, and outputting some information about the feed: Once included in your script, the rss module will take care of all of the heavy lifting involved in parsing the feed, in the end providing you with an object from which you can access the various RSS elements. RSS parsing has become so commonplace that the capability is built directly into the Ruby language. Writing these sorts of capabilities from scratch can be a real chore however, with Ruby much of the work has already been done for you! Using Ruby to Consume RSS Feeds Therefore, to parse and format a feed, you need to iterate over the tags found in the document, and understand the context of the content found within. For example, here’s a snippet from my blog’s RSS feed: If you open any RSS feed within a text editor, you’ll see it contains a bunch of slightly confusing tags that delimit data identified as titles, URLs, dates, creators, and descriptions, among others. That is, easy if you understand RSS’ XML dialect. This XML-based format made it possible for content publishers to distribute information in a format-agnostic manner, allowing others to integrate this content into then web sites with relative ease.
RSS was created almost a decade ago by Netscape for use on their My Netscape portal, which made it possible for users to customize their home pages with a variety of custom data (at the time a cutting-edge development). You can use what you learn here to do something as simple as including a favorite RSS feed on your web site, or as the basis for building your own custom RSS aggregator! RSS Internals
JAVA RSS FEED READER EXAMPLE HOW TO
Although attempting to digest this much information on a regular basis is probably overkill for most, it’s a testament to the efficiency boost gained from subscribing to RSS feeds in lieu of navigating from one web site to the next.īut what exactly is an RSS feed, and how does one go about consuming them? In this tutorial, I’ll show you how to use Ruby to retrieve and parse RSS feeds from your favorite web sites. Last year, noted blogger and technical evangelist Robert Scoble made headlines by explaining how he manages to read a staggering 622 RSS (Rich Site Summary) feeds each and every morning.
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