// http 1xx · informational
HTTP 100 Continue
Headers received; the client should send the request body.
What HTTP 100 Continue means
100 Continue is an interim response telling the client that the request headers were received and it's fine to send the request body. It's used when a client sends an `Expect: 100-continue` header before uploading a large body, so it can avoid sending the payload if the server would reject it.
Which category is it?
100 is a 1xx code — Informational. 1xx responses are interim: the request was received and the process is continuing. The client should wait for the final response.