class Patron::Session

def request(action, url, headers, options = {})
  # If the Expect header isn't set uploads are really slow
  headers['Expect'] ||= ''
  req = Request.new
  req.action                 = action
  req.headers                = self.headers.merge headers
  req.timeout                = options.fetch :timeout,               self.timeout
  req.connect_timeout        = options.fetch :connect_timeout,       self.connect_timeout
  req.max_redirects          = options.fetch :max_redirects,         self.max_redirects
  req.username               = options.fetch :username,              self.username
  req.password               = options.fetch :password,              self.password
  req.proxy                  = options.fetch :proxy,                 self.proxy
  req.proxy_type             = options.fetch :proxy_type,            self.proxy_type
  req.auth_type              = options.fetch :auth_type,             self.auth_type
  req.insecure               = options.fetch :insecure,              self.insecure
  req.ignore_content_length  = options.fetch :ignore_content_length, self.ignore_content_length
  req.buffer_size            = options.fetch :buffer_size,           self.buffer_size
  req.multipart              = options[:multipart]
  req.upload_data            = options[:data]
  req.file_name              = options[:file]
  url = self.base_url.to_s + url.to_s
  uri = URI.parse(url)
  query = uri.query.to_s.split('&')
  query += options[:query].is_a?(Hash) ? Util.build_query_pairs_from_hash(options[:query]) : options[:query].to_s.split('&')
  uri.query = query.join('&')
  uri.query = nil if uri.query.empty?
  url = uri.to_s
  raise ArgumentError, "Empty URL" if url.empty?
  req.url = url
  handle_request(req)
end