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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, sendfile=nil)
@app = app
@sendfile = sendfile
end
def call(env)
status, headers, body = @app.call(env)
headers = HeaderHash.new(headers)
if !STATUS_WITH_NO_ENTITY_BODY.include?(status.to_i) &&
!headers['Content-Length'] &&
!headers['Transfer-Encoding'] &&
!(@sendfile && headers[@sendfile])
new_body, length = [], 0
body.each do |part|
new_body << part
length += bytesize(part)
end
body = new_body
headers['Content-Length'] = length.to_s
end
[status, headers, body]
end
end
end
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