gistfile1.rb

def fetch
  data = {}
  begin
    io = open(URI.encode(@baseurl))
    doc = Nokogiri::HTML(io)
    io.close!
    # ... process doc ...
  end
  rescue Errno::ETIMEDOUT
    return nil
  rescue Errno::ECONNREFUSED
    return nil
  rescue SocketError
    return nil
  rescue Timeout::Error
    return nil
  rescue Errno::ECONNRESET
    return nil
  rescue EOFError
    return nil
  rescue OpenURI::HTTPError => e
    return nil if e.io.status[0].to_s != "404"
    data['name_changed'] = true
  end

  data
end