Robby on Rails

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I found this googling for info on the simple-rss gem. Will try to write how I used it on http://ruby.vanhecke.info

Note: For this to work, you need to edit the last part of line 14. (It has an incorrectly encoded less-than sign between if i and 10.

Here’s a version you can pop in you lib and call from your pages… cheers

  require 'rss/2.0'
  require 'open-uri'

  class RssReader

    def parseFeed (url, length)
      feed_url = url
      output = "";
      open(feed_url) do |http|
        response = http.read
        result = RSS::Parser.parse(response, false)
        output = "<span class=\"feedTitle\">#{result.channel.title}</span><br /><ul>" 
        result.items.each_with_index do |item, i|
          output += "<li><a href=\"#{item.link}\">#{item.title}</a></li>" if ++i < length  
        end 
        output += "</ul>" 
      end
      return output
    end

  end

Wow, I’ve been looking for this all day! Thank you!

i’m the type of guy that likes these kind of posts

Just note that if you want to read RSS 1.0, you need to add

require 'rss/1.0.rb'

it will work just like it… nothing else…

Sorry, only

require 'rss/1.0'

without .rb …

thanks!

thanks!

thanks!

thanks!

Thanks Robby, really useful.

I refactored this to be more railsy:

require 'rss/2.0'
require 'open-uri'

class RssReader

  def self.posts_for(feed_url, length=2, perform_validation=false)
    posts = []
    open(feed_url) do |rss|
      posts = RSS::Parser.parse(rss, perform_validation).items
    end
    posts[0..length - 1] if posts.size > length
  end

end

In this case, the view (in haml) would be:

%ul{:id => 'recent_blog_posts'}
- @posts.each do |post|
  %li
    = post.title
    %br/
    = post.description

thanks for that quickie :)

Can I get a link for that erection cream?

how to parser RSS with Ajax on Rails?

Not to be grammatically picky, but one would say ‘an RSS feed’ as the pronunciation of letter R starts with a vowel sound.

Otherwise, a useful titbit, thanks :)

More than useful, small, dry, working. Thanks for that piece.

Cheers, Jason

The post is excellent, the comments make it even more usefull. Did you know you are nice guys ? :-)

Hi, this is very useful.

I will had to add some rescue statements for what I want to do, but this is a good start.

Thank you!

this can also be done with acts_as_feed http://github.com/grosser/acts_as_feed , which will represent the feed as feed model or as addition to a model, and parsing can be offloaded to a background process.

Just a quick update. The last line

posts[0..length – 1] if posts.size > length

will only return posts if the rss returns a number of posts > length otherwise it returns nil

posts.size > length ? posts[0..length – 1] : posts

should be used to return all posts when the total available posts is less the length

Thanks a lot.

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More than useful, small, dry, working. Thanks for that piece.

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I like your quick and dirty response. In fact, I like quick and dirty little codes myself. I just try to polish things once I think I got the work perfected, or something like that.

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I agree with Clement. What makes this post even more interesting and even more helpful are the several comments that follow that try to improve on the code. It is like research made easy. Thanks.

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I wish I am posting a comment as a contributor. As for now, I would really want updates from those who posted previous comments on what is really the best way to go about parsing RSS feeds.

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