Non-preemptive authentication means that the Proxy-Authorization will not be actively sent when the tunnel is established, and this authentication will be brought after receiving the 407 response.
The server will now directly close the connection when the proxy verification fails, and the client will still send a request on this connection without knowing it, causing the client to report an error.
Therefore, you should explicitly return close when closing the connection.
In [rfc7230#Connection](https://tools.ietf.org/html/rfc7230#section-6.1)
> A server that does not support persistent connections MUST send the
"close" connection option in every response message that does not
have a 1xx (Informational) status code.
token is the current token comparison, and oidc generates oidc token using client-credentials flow. in addition - add ping verification using the same method
Now that the common configuration objects and session objects are part
of a public API, they need to be documented in a way that can be read
with godoc. This commit should lead to easier development with FRP as a
library.
The ClientCommonConf, configuration file path, and server UDP port are
now passed around as arguments instead of being shared between
components as global variables. This allows for multiple clients to
exist in the same process, and allows client.Session to be used as a
library more easily.
This option allows users to specify where they want assets to be loaded
from, like the "assets_dir" option that already exists for frps. This
allows library users to use the admin panel without having to bundle
assets with statik.
The ServerCommonConf is now passed around as an argument instead of
being shared between components as a global variable. This allows for
more natural interaction with server.Session as a library and allows for
multiple servers to co-exist within the same process.
Related: #1387
