4×× - Client Error

411 Length Required

The server refuses to accept the request without a defined Content-Length¹.

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.

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• ¹ Content-Length RFC7230 Section 3.3.2
• Source: RFC7231 Section 6.5.10

411 Code References

• Rails HTTP Status Symbol: :length_required
• Go HTTP Status Constant: http.StatusLengthRequired
• Symfony HTTP Status Constant: Response::HTTP_LENGTH_REQUIRED
• Python2 HTTP Status Constant: httplib.LENGTH_REQUIRED
• Python3+ HTTP Status Constant: http.client.LENGTH_REQUIRED
• Python3.5+ HTTP Status Constant: http.HTTPStatus.LENGTH_REQUIRED