class Rack::ContentLength

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

Public Class Methods

new(app) click to toggle source
# File lib/rack/content_length.rb, line 8
def initialize(app)
  @app = app
end

Public Instance Methods

call(env) click to toggle source
# File lib/rack/content_length.rb, line 12
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'] &&
     (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