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# frozen_string_literal: true
module Rack
# Proxy for response bodies allowing calling a block when
# the response body is closed (after the response has been fully
# sent to the client).
class BodyProxy
# Set the response body to wrap, and the block to call when the
# response has been fully sent.
def initialize(body, &block)
@body = body
@block = block
@closed = false
end
# Return whether the wrapped body responds to the method.
def respond_to_missing?(method_name, include_all = false)
super or @body.respond_to?(method_name, include_all)
end
# If not already closed, close the wrapped body and
# then call the block the proxy was initialized with.
def close
return if @closed
@closed = true
begin
@body.close if @body.respond_to? :close
ensure
@block.call
end
end
# Whether the proxy is closed. The proxy starts as not closed,
# and becomes closed on the first call to close.
def closed?
@closed
end
# Delegate missing methods to the wrapped body.
def method_missing(method_name, *args, &block)
@body.__send__(method_name, *args, &block)
end
ruby2_keywords(:method_missing) if respond_to?(:ruby2_keywords, true)
end
end