35 μΙηΌ³΅@]ΪΦ~ (ε) 2023/09/05 01:19:48
Connection coalescing with ORIGIN Frames: fewer DNS queries, fewer connections
https://blog.cloudflare.com/connection-coalescing-with-origin-frames-fewer-dns-queries-fewer-connections/
The ORIGIN Frame is an extension to the HTTP/2 and HTTP/3 specification, a special Frame sent on stream 0 or the control stream of the connection respectively. The Frame allows the servers to send an eorigin-setf to the clients on an existing established TLS connection, which includes hostnames that it is authorized for and will not incur any HTTP 421 errors. Hostnames in the origin-set MUST also appear in the certificate SAN list for the server, even if those hostnames are announced on different IP addresses via DNS.
Specifically, two different steps are required: