1xx
In the context of HTTP, the 1xx class of status codes represents informational responses. They indicate that a request has been received and that the client should continue with the request or prepare for further action. 1xx responses are provisional and do not convey a final result about the request.
Common examples of 1xx status codes include:
- 100 Continue: The server has received the request headers and the client can continue sending the
- 101 Switching Protocols: The server is changing to a different protocol as requested by the client,
- 102 Processing: Used by certain servers (notably WebDAV) to indicate that the request has been accepted
- 103 Early Hints: The server can send preliminary headers to speed up the rendering of a page
1xx responses are interim and are not meant to be cached in standard practice. They usually do
The 1xx class is defined within the HTTP/1.1 specification and has been described in successive RFCs, including