enum class Protocol
Protocols that OkHttp implements for ALPN selection.
Protocol vs Scheme¶
Despite its name, java.net.URL.getProtocol returns the scheme (http, https, etc.) of the URL, not the protocol (http/1.1, spdy/3.1, etc.). OkHttp uses the word protocol to identify how HTTP messages are framed.
|HTTP_1_0||An obsolete plaintext framing that does not use persistent sockets by default.|
|HTTP_1_1||A plaintext framing that includes persistent connections.|
|HTTP_2||The IETF’s binary-framed protocol that includes header compression, multiplexing multiple requests on the same socket, and server-push. HTTP/1.1 semantics are layered on HTTP/2.|
|H2_PRIOR_KNOWLEDGE||Cleartext HTTP/2 with no “upgrade” round trip. This option requires the client to have prior knowledge that the server supports cleartext HTTP/2.|
|QUIC||QUIC (Quick UDP Internet Connection) is a new multiplexed and secure transport atop UDP, designed from the ground up and optimized for HTTP/2 semantics. HTTP/1.1 semantics are layered on HTTP/2.|
|toString||Returns the string used to identify this protocol for ALPN, like “http/1.1”, “spdy/3.1” or “h2”.
Companion Object Functions¶
|get||Returns the protocol identified by