module HTTP::Status

def self.redirect?(status)

See also REDIRECT_STATUS.
Returns true if the given status is thought to be redirect. 
def self.redirect?(status)
  REDIRECT_STATUS.include?(status)
end

def self.successful?(status)

See also SUCCESSFUL_STATUS.
Returns true if the given status represents successful HTTP response. 
def self.successful?(status)
  SUCCESSFUL_STATUS.include?(status)
end