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Versions: 7
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Contents
module Hanami
module Action
module Cache
# @since 0.3.0
# @api private
IF_NONE_MATCH = 'HTTP_IF_NONE_MATCH'.freeze
# The HTTP header for ETag
#
# @since 0.3.0
# @api private
ETAG = 'ETag'.freeze
# @since 0.3.0
# @api private
IF_MODIFIED_SINCE = 'HTTP_IF_MODIFIED_SINCE'.freeze
# The HTTP header for Last-Modified
#
# @since 0.3.0
# @api private
LAST_MODIFIED = 'Last-Modified'.freeze
# ETag value object
#
# @since 0.3.0
# @api private
#
class ETag
def initialize(env, value)
@env, @value = env, value
end
def fresh?
none_match && @value == none_match
end
def header
{ ETAG => @value } if none_match
end
private
def none_match
@env[IF_NONE_MATCH]
end
end
# LastModified value object
#
# @since 0.3.0
# @api private
class LastModified
def initialize(env, value)
@env, @value = env, value
end
def fresh?
modified_since && Time.httpdate(modified_since).to_i >= @value.to_i
end
def header
{ LAST_MODIFIED => @value.httpdate } if modified_since
end
private
def modified_since
@env[IF_MODIFIED_SINCE]
end
end
# Class responsible to determine if a given request is fresh
# based on IF_NONE_MATCH and IF_MODIFIED_SINCE headers
#
# @since 0.3.0
# @api private
class ConditionalGet
def initialize(env, options)
@validations = [ ETag.new(env, options[:etag]), LastModified.new(env, options[:last_modified]) ]
end
def fresh?
yield if @validations.any?(&:fresh?)
end
def headers
@validations.map(&:header).compact.reduce Hash.new, :merge
end
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems