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module ActionDispatch
module Http
class Headers
CGI_VARIABLES = %w(
CONTENT_TYPE CONTENT_LENGTH
HTTPS AUTH_TYPE GATEWAY_INTERFACE
PATH_INFO PATH_TRANSLATED QUERY_STRING
REMOTE_ADDR REMOTE_HOST REMOTE_IDENT REMOTE_USER
REQUEST_METHOD SCRIPT_NAME
SERVER_NAME SERVER_PORT SERVER_PROTOCOL SERVER_SOFTWARE
)
HTTP_HEADER = /\A[A-Za-z0-9-]+\z/
include Enumerable
attr_reader :env
def initialize(env = {})
@env = env
end
def [](key)
@env[env_name(key)]
end
def []=(key, value)
@env[env_name(key)] = value
end
def key?(key)
@env.key? env_name(key)
end
alias :include? :key?
def fetch(key, *args, &block)
@env.fetch env_name(key), *args, &block
end
def each(&block)
@env.each(&block)
end
def merge(headers_or_env)
headers = Http::Headers.new(env.dup)
headers.merge!(headers_or_env)
headers
end
def merge!(headers_or_env)
headers_or_env.each do |key, value|
self[env_name(key)] = value
end
end
private
def env_name(key)
key = key.to_s
if key =~ HTTP_HEADER
key = key.upcase.tr('-', '_')
key = "HTTP_" + key unless CGI_VARIABLES.include?(key)
end
key
end
end
end
end
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