The HyperText Transfer Protocol (HTTP)
400 Bad Request response status code indicates that the server cannot or will not process the request due to something that is perceived to be a client error (e.g., malformed request syntax, invalid request message framing, or deceptive request routing).
The client should not repeat this request without modification.
400 Bad Request
|RFC 7231, section 6.5.1: 400 Bad Request||Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content|