An example to fetch feeds.

fetch_feed.rb

# Add this line into your Gemfile.
gem 'feedzirra', '~> 0.0.24'

# Fetch and Parse, we take javascript weekly as an example.
feed = Feedzirra::Feed.fetch_and_parse('http://javascriptweekly.com/rss')

# Basic information of the feed.
feed.title
feed.url
feed.feed_url
feed.etag
feed.last_modified

# Get the content
rs = []
feed.entries.each do |ent|
  rs << ent.content
end

# Then we can store them all to database or scrape words or images we need.