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require 'rack/utils'
module Rack
# Sets the Content-Length header on responses with fixed-length bodies.
class ContentLength
include Rack::Utils
def initialize(app)
@app = app
end
def call(env)
status, headers, body = @app.call(env)
headers = HeaderHash.new(headers)
if !STATUS_WITH_NO_ENTITY_BODY.include?(status) &&
!headers['Content-Length'] &&
!headers['Transfer-Encoding'] &&
(body.respond_to?(:to_ary) || body.respond_to?(:to_str))
body = [body] if body.respond_to?(:to_str) # rack 0.4 compat
length = body.to_ary.inject(0) { |len, part| len + bytesize(part) }
headers['Content-Length'] = length.to_s
end
[status, headers, body]
end
end
end
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