Can https maintain a persistent connection?

No problem under the http proxy, http protocol with connection pool,

proxy can forward the request to each other after receiving the request. With keepalive, the persistent connection can be maintained

but HTTP/1.1 200 Connection Established

is returned after receiving the CONNECT request from the client under https.

and connect to the target server

then forward data to each other. After the http proxy, client receives the forwarded data, the connection to the target server maintained by proxy is automatically disconnected.

the connection of the target server cannot be maintained with keepalive. How to solve the problem

?
Https http
Mar.23,2021

I found the answer by myself and read the https protocol again

after the transmission is completed, the client initiates a close_notify message and the server closes the connection.

so when proxy receives a close_notify message from the client, it will not cause the connection to be closed.

at present, there is no problem. The connection has been maintained

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