---
set: 4
code: 411
title: Length Required
references:
    "Rails HTTP Status Symbol": ":length_required"
---

The 411 (Length Required) status code indicates that the server refuses to
accept the request without a defined Content-Length
([Section 3.3.2 of RFC7230][2]). The client MAY repeat the request if it adds a
valid Content-Length header field containing the length of the message body in
the request message.

Source: [RFC7231 Section 6.5.10][1]

[1]: <http://tools.ietf.org/html/rfc7231#section-6.5.10>
[2]: <http://tools.ietf.org/html/rfc7230#section-3.3.2>