This memo explains how to use the Upgrade mechanism in HTTP/1.1 to initiate Transport Layer Security (TLS) over an existing TCP connection. [STANDARDS-TRACK]
updated by
rfc-7230 — Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing
rfc-7231 — Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content
updates
rfc-2616 — Hypertext Transfer Protocol -- HTTP/1.1