`class Vary`

Represents the vary header, which specifies the request headers a server considers when determining the response.

The vary header is used in HTTP responses to indicate which request headers affect the selected response. It allows caches to differentiate stored responses based on specific request headers.

Definitions

`def self.parse(value)`

Parses a raw header value.

Signature

parameter　value　String: a raw header value containing comma-separated header names.
returns　Vary: a new instance with normalized (lowercase) header names.

Implementation

def self.parse(value)
	self.new(value.downcase.split(COMMA))
end

`def self.coerce(value)`

Coerces a value into a parsed header object.

Signature

parameter　value　String | Array: the value to coerce.
returns　Vary: a parsed header object with normalized values.

Implementation

def self.coerce(value)
	case value
	when Array
		self.new(value.map(&:downcase))
	else
		self.parse(value.to_s)
	end
end

`def <<(value)`

Adds one or more comma-separated values to the vary header. The values are converted to lowercase for normalization.

Signature

parameter　value　String: a raw header value containing one or more values separated by commas.

Implementation

def << value
	super(value.downcase)
end