HTTP 411 Length Required — What It Means & How to Fix It
Error4xx client error
Overview
The HTTP 411 Length Required status code indicates the server requires the Content-Length header in the request, but it was not provided.
Key Details
- The server refuses to accept the request without a valid Content-Length header.
- This header tells the server the size of the request body in bytes.
- The client should add the Content-Length header and retry the request.
- Some servers require this for all requests with a body.
Common Causes
- The request body was sent without a Content-Length header.
- Chunked transfer encoding was used but the server requires a known content length.
- A proxy stripped the Content-Length header from the request.
Steps
- 1Add a Content-Length header to your request with the correct body size in bytes.
- 2If using chunked encoding, switch to sending the full body with Content-Length.
- 3Check if a proxy is stripping required headers.
- 4Verify your HTTP client library is setting Content-Length automatically.
Tags
httpclient-errorcontent-lengthheader
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ErrorFrequently Asked Questions
It means the server requires a Content-Length header in the request but none was provided. Add the header with the size of your request body.