411
HTTP 411 Length Required
4xx Client Error
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4xx Client Error
RFC 7231, Section 6.5.10
What is HTTP 411 Length Required?
The 411 (Length Required) status code indicates that the server refuses to accept the request without a defined Content-Length header. The client must include a valid Content-Length header field containing the length of the message body.
Common Use Cases
- Upload endpoints requiring Content-Length
- APIs that validate request body size before processing