Method: Rack::Lint#check_content_length

Defined in:

lib/rack/lint.rb

#check_content_length(status, headers, env) ⇒ Object

The Content-Length

# File 'lib/rack/lint.rb', line 455

def check_content_length(status, headers, env)
  headers.each { |key, value|
    if key.downcase == 'content-length'
      ## There must not be a <tt>Content-Length</tt> header when the
      ## +Status+ is 1xx, 204 or 304.
      assert("Content-Length header found in #{status} response, not allowed") {
        not Rack::Utils::STATUS_WITH_NO_ENTITY_BODY.include? status.to_i
      }

      bytes = 0
      string_body = true

      if @body.respond_to?(:to_ary)
        @body.each { |part|
          unless part.kind_of?(String)
            string_body = false
            break
          end

          bytes += Rack::Utils.bytesize(part)
        }

        if env["REQUEST_METHOD"] == "HEAD"
          assert("Response body was given for HEAD request, but should be empty") {
            bytes == 0
          }
        else
          if string_body
            assert("Content-Length header was #{value}, but should be #{bytes}") {
              value == bytes.to_s
            }
          end
        end
      end

      return
    end
  }
end