103
Early Hints
InformationalUsed to return some response headers before the final HTTP message, letting the client preload resources.
Category: 1xx Informational Standard: RFC 8297
What is 103 Early Hints?
HTTP 103 Early Hints is a 1xx status code. Used to return some response headers before the final HTTP message, letting the client preload resources.
Client Request
Server
Processing
Common Causes
The client sent an Expect header or an upgrade request
An intermediate step in a longer request/response exchange
A protocol negotiation is in progress
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