[Feature Request] Support get client ip by MetaExtractor

[jolestar]

The server needs to know the client IP in some cases, such as rate limit, add permission controller by IP, etc.

[tomusdrw]

Which transport do you mean? It's just a matter of exposing things in the RequestContext of specific server implementation, like here:

jsonrpc/ws/src/metadata.rs

Line 65 in 61ea7c6

pub struct RequestContext {

[jolestar]

Http & Websocket， tcp transport can get SocketAddr from context

[ghostant-1017]

Did you solve this problem? @jolestar

[jolestar]

Did you solve this problem? @jolestar

We now get the IP address from HTTP Header.