What Is a 431 Status Code?
The server is unwilling to process the request because its header fields are too large. The request MAY be resubmitted after reducing the size of the request header fields.
It can be used both when the set of request header fields in total is too large, and when a single header field is at fault. In the latter case, the response representation SHOULD specify which header field was too large.
HTTP/1.1 431 Request Header Fields Too Large Content-Type: text/html <html> <head> <title>Request Header Fields Too Large</title> </head> <body> <h1>Request Header Fields Too Large</h1> <p>The "Example" header was too large.</p> </body> </html>
Responses with the 431 status code MUST NOT be stored by a cache.
- Source: RFC6585 Section 5
431 CODE REFERENCES
Symfony HTTP Status Constant
- Learn about web development
- Learn about SEO
- Web development services from WebFX
- SEO services from WebFX
- MDN Web Docs