class Rack::ContentLength

Sets the content-length header on responses that do not specify a content-length or transfer-encoding header. Note that this does not fix responses that have an invalid content-length header specified.

Public Class Methods

new (app)

# File lib/rack/content_length.rb, line 15
def initialize(app)
  @app = app
end

Public Instance Methods

call (env)

# File lib/rack/content_length.rb, line 19
def call(env)
  status, headers, body = response = @app.call(env)

  if !STATUS_WITH_NO_ENTITY_BODY.key?(status.to_i) &&
     !headers[CONTENT_LENGTH] &&
     !headers[TRANSFER_ENCODING] &&
     body.respond_to?(:to_ary)

    response[2] = body = body.to_ary
    headers[CONTENT_LENGTH] = body.sum(&:bytesize).to_s
  end

  response
end