Class: SecureHeaders::XFrameOptions

Inherits:
Object
  • Object
show all
Defined in:
lib/secure_headers/headers/x_frame_options.rb

Constant Summary collapse

HEADER_NAME = 
"X-Frame-Options".freeze
SAMEORIGIN = 
"sameorigin"
DENY = 
"deny"
ALLOW_FROM = 
"allow-from"
ALLOW_ALL = 
"allowall"
DEFAULT_VALUE = 
SAMEORIGIN
VALID_XFO_HEADER = 
/\A(#{SAMEORIGIN}\z|#{DENY}\z|#{ALLOW_ALL}\z|#{ALLOW_FROM}[:\s])/i

Class Method Summary collapse

Class Method Details

.make_header(config = nil, user_agent = nil) ⇒ Object

Public: generate an X-Frame-Options header.

Returns a default header if no configuration is provided, or a header name and value based on the config.



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# File 'lib/secure_headers/headers/x_frame_options.rb', line 18

def make_header(config = nil, user_agent = nil)
  return if config == OPT_OUT
  [HEADER_NAME, config || DEFAULT_VALUE]
end

.validate_config!(config) ⇒ Object

Raises:

  • (TypeError) 


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# File 'lib/secure_headers/headers/x_frame_options.rb', line 23

def validate_config!(config)
  return if config.nil? || config == OPT_OUT
  raise TypeError.new("Must be a string. Found #{config.class}: #{config}") unless config.is_a?(String)
  unless config =~ VALID_XFO_HEADER
    raise XFOConfigError.new("Value must be SAMEORIGIN|DENY|ALLOW-FROM:|ALLOWALL")
  end
end