411Length Required
The server will not accept the request without a Content-Length header.
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A request with a body but no declared length, usually from a hand-built client or a script assembling requests manually. Ordinary HTTP libraries set Content-Length for you, so this rarely appears in normal use.
It also appears when a client streams a body without declaring a size and the server refuses to accept an open-ended upload. Buffering the body so its length is known before sending is the usual fix.
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Status codes
69 of 69 codes. Click a row to copy it.
1xx Informational (4)
2xx Success (10)
3xx Redirection (8)
4xx Client errors (31)
5xx Server errors (16)