feed_handler.rb
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require 'feedparser'
require 'open-uri'
class FeedHandler
def parse(content)
raise FeedHandler::ParseError, "Content is nil" if content.nil?
begin
return FeedParser::Feed::new(content)
rescue Exception => ex
raise FeedHandler::ParseError, ex.to_s
end
end
def fetch(address)
begin
content = ""
open(address) do |s| content = s.read end
return content
rescue Exception => ex
raise FeedHandler::FetchError, ex.to_s
end
end
def process(container)
container.class.transaction do
container.clear
content = fetch(container.address)
container.fetched_at = Time.now
parse = parse(content)
container.feed_title = parse.title
parse.items[0..container.limit-1].each do |item|
container.add_item(item.title, item.link, item.date, item.content)
end
container.save!
end
end
class ParseError < Exception; end
class FetchError < Exception; end
end