Sets the Content-Length header on responses with fixed-length bodies.

Methods
C
N
Included Modules
Class Public methods
new(app, sendfile=nil)
# File railties/lib/rails/rack/content_length.rb, line 10
def initialize(app, sendfile=nil)
  @app = app
  @sendfile = sendfile
end
Instance Public methods
call(env)
# File railties/lib/rails/rack/content_length.rb, line 15
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])

    old_body = body
    body, length = [], 0
    old_body.each do |part|
      body << part
      length += bytesize(part)
    end
    old_body.close if old_body.respond_to?(:close)
    headers['Content-Length'] = length.to_s
  end

  [status, headers, body]
end