HTTP Messages

The structure of HTTP requests and responses, including start lines, fields, and content.

Requests contain a method, target, and fields. Responses contain a status code and fields. HTTP/2 and HTTP/3 carry the same semantics in binary frames rather than HTTP/1.1 text syntax.

POST /api/users HTTP/1.1
Host: api.example.com
Content-Type: application/json
Content-Length: 15

{"name":"Ada"}