411

411 Length Required Error

Category: HTTP Errors | Platforms: apache nginx

What This Error Means

The 411 Length Required error indicates that the server refuses to accept the request without a defined Content-Length header. The server requires the client to specify the size of the request body upfront.

Common Causes

  • A client sending a POST or PUT request without a Content-Length header.
  • Chunked transfer encoding being used when the server doesn't support it for that resource.
  • Proxy servers stripping headers.

How to Fix It (For Users)

  1. 1 This is typically a technical issue with the software making the request, not a user error.

For Site Owners / Developers

  1. Ensure your API clients are sending the Content-Length header.
  2. Check your server configuration to see if it requires length for specific methods.
  3. Update your web server software.

When It Is NOT Your Fault

If the software you are using is poorly coded.

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