Skip to content

Instantly share code, notes, and snippets.

@iannono
Forked from pauldix/gist:57285
Created August 27, 2013 07:20
Show Gist options
  • Save iannono/6350584 to your computer and use it in GitHub Desktop.
Save iannono/6350584 to your computer and use it in GitHub Desktop.
require 'feedzirra'
# fetching a single feed
feed = Feedzirra::Feed.fetch_and_parse("http://feeds.feedburner.com/PaulDixExplainsNothing")
# feed and entries accessors
feed.title # => "Paul Dix Explains Nothing"
feed.url # => "http://www.pauldix.net"
feed.feed_url # => "http://feeds.feedburner.com/PaulDixExplainsNothing"
feed.etag # => "GunxqnEP4NeYhrqq9TyVKTuDnh0"
feed.last_modified # => Sat Jan 31 17:58:16 -0500 2009 # it's a Time object
entry = feed.entries.first
entry.title # => "Ruby Http Client Library Performance"
entry.url # => "http://www.pauldix.net/2009/01/ruby-http-client-library-performance.html"
entry.author # => "Paul Dix"
entry.summary # => "..."
entry.content # => "..."
entry.published # => Thu Jan 29 17:00:19 UTC 2009 # it's a Time object
entry.categories # => ["...", "..."]
# sanitizing an entry's content
entry.title.sanitize # => returns the title with harmful stuff escaped
entry.author.sanitize # => returns the author with harmful stuff escaped
entry.content.sanitize # => returns the content with harmful stuff escaped
entry.content.sanitize! # => returns content with harmful stuff escaped and replaces original (also exists for author and title)
entry.sanitize! # => sanitizes the entry's title, author, and content in place (as in, it changes the value to clean versions)
feed.sanitize_entries! # => sanitizes all entries in place
# updating a single feed
updated_feed = Feedzirra::Feed.update(feed)
# an updated feed has the following extra accessors
updated_feed.updated? # returns true if any of the feed attributes have been modified. will return false if only new entries
updated_feed.new_entries # a collection of the entry objects that are newer than the latest in the feed before update
# fetching multiple feeds
feed_urls = ["http://feeds.feedburner.com/PaulDixExplainsNothing", "http://feeds.feedburner.com/trottercashion"]
feeds = Feedzirra::Feed.fetch_and_parse(feeds_urls)
# feeds is now a hash with the feed_urls as keys and the parsed feed objects as values. If an error was thrown
# there will be a Fixnum of the http response code instead of a feed object
# updating multiple feeds. it expects a collection of feed objects
updated_feeds = Feedzirra::Feed.update(feeds.values)
# defining custom behavior on failure or success. note that a return status of 304 (not updated) will call the on_success handler
feed = Feedzirra::Feed.fetch_and_parse("http://feeds.feedburner.com/PaulDixExplainsNothing",
:on_success => lambda {|feed| puts feed.title },
:on_failure => lambda {|url, response_code, response_header, response_body| puts response_body })
# if a collection was passed into fetch_and_parse, the handlers will be called for each one
# the behavior for the handlers when using Feedzirra::Feed.update is slightly different. The feed passed into on_success will be
# the updated feed with the standard updated accessors. on failure it will be the original feed object passed into update
# You can add custom parsing to the feed entry classes. Say you want the wfw:comments fields in an entry
Feedzirra::Feed.add_common_feed_entry_element("wfw:commentRss", :as => :comment_rss)
# The arguments are the same as the SAXMachine arguments for the element method. For more example usage look at the RSSEntry and
# AtomEntry classes. Now you can access those in an atom feed:
Feedzirra::Feed.parse(some_atom_xml).entries.first.comment_rss_ # => wfw:commentRss is now parsed!
# You can also access http basic auth feeds. Unfortunately, you can't get to these inside of a bulk get of a bunch of feeds.
# You'll have to do it on its own like so:
Feedzirra::Feed.fetch_and_parse(some_url, :http_authentication => ["myusername", "mypassword"])
# Defining custom parsers
# TODO: the functionality is here, just write some good examples that show how to do this
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment