inn-network 0.1.1

A network library for Inn
Documentation 
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//-------------------------------------------------------------------
// MIT License
// Copyright (c) 2022 black-mongo
// @author CameronYang
// @doc
//
// @end
// Created : 2022-04-15T12:32:45+08:00
//-------------------------------------------------------------------

use crate::codec::AuthChoice;
use crate::messages::*;
use actix::prelude::*;
use actix::{Actor, Context, Handler};
use log::debug;
use rand::rngs::ThreadRng;
use rand::Rng;
use std::collections::HashMap;
// Enable it socks5 must auth
const MUST_AUTH: bool = true;
#[derive(Clone)]
pub struct ProxyServer {
    sessions: HashMap<usize, Recipient<ToSession>>,
    rng: ThreadRng,
}
impl Default for ProxyServer {
    fn default() -> Self {
        ProxyServer {
            sessions: HashMap::new(),
            rng: rand::thread_rng(),
        }
    }
}
impl ProxyServer {
    pub fn auth_choice(auths: &[u8]) -> AuthChoice {
        for auth in auths {
            if *auth == 0x02 {
                return AuthChoice::UserNamePwd;
            }
            if *auth == 0x00 && !MUST_AUTH {
                return AuthChoice::NoAuth;
            }
            if *auth == 0x00 && MUST_AUTH {
                return AuthChoice::UserNamePwd;
            }
        }
        AuthChoice::NoAcceptable
    }
}
impl Actor for ProxyServer {
    type Context = Context<Self>;
    fn started(&mut self, _ctx: &mut Self::Context) {}
}
impl Handler<ToProxyServer> for ProxyServer {
    type Result = MessageResult<ToProxyServer>;
    fn handle(&mut self, command: ToProxyServer, _ctx: &mut Context<Self>) -> Self::Result {
        match command {
            ToProxyServer::Connect(recipient) => {
                debug!("connect");
                let id = self.rng.gen::<usize>();
                self.sessions.insert(id, recipient.clone());
                recipient.do_send(ToSession::ProxyServerReply(ProxyServerReply::Id(id)));
                MessageResult(ProxyServerReply::Id(id))
            }
            ToProxyServer::DisConnect(id) => {
                debug!("disconnect");
                self.sessions.remove(&id);
                MessageResult(ProxyServerReply::Ok)
            }
            ToProxyServer::OnlineCounter(id) => {
                let len = self.sessions.len();
                if let Some(session) = self.sessions.get(&id) {
                    session.do_send(ToSession::ProxyServerReply(
                        ProxyServerReply::OnlineCounter(len),
                    ));
                }
                MessageResult(ProxyServerReply::OnlineCounter(len))
            }
            ToProxyServer::Cli(id, cli) => {
                let cmd: Vec<String> = cli.into();
                debug!("server recv cmd = {:?}", cmd);
                match (self.sessions.get(&id), cmd.as_slice()) {
                    (Some(session), [c]) if c == "online_counter" => {
                        let len = self.sessions.len();
                        session.do_send(ToSession::ProxyServerReply(ProxyServerReply::Cli(
                            inn_common::cli::Cli::Integers(len as i64),
                        )));
                    }
                    (Some(session), [c]) if c == "stop" => {
                        session.do_send(ToSession::Stop);
                    }
                    _ => {}
                }
                MessageResult(ProxyServerReply::Ok)
            }
            ToProxyServer::HttpReq(http_req) => {
                debug!("{:?}", http_req);
                let msg = ToSession::ProxyServerReply(ProxyServerReply::HttpReq(http_req));
                for s in self.sessions.values() {
                    s.do_send(msg.clone());
                }
                MessageResult(ProxyServerReply::Ok)
            }
        }
    }
}
#[cfg(test)]
mod test {
    use super::*;
    pub struct Session;
    impl Actor for Session {
        type Context = Context<Self>;
        fn started(&mut self, _: &mut Context<Self>) {}
    }
    impl Handler<ToSession> for Session {
        type Result = MessageResult<ToSession>;
        fn handle(&mut self, _: ToSession, _: &mut Context<Self>) -> Self::Result {
            MessageResult(SessionReply::Ok)
        }
    }
    #[actix_rt::test]
    async fn new_session() {
        let addr = ProxyServer::default().start();
        let session = Session.start();
        let counter = addr.send(ToProxyServer::OnlineCounter(0)).await.unwrap();
        assert_eq!(counter, ProxyServerReply::OnlineCounter(0));
        let id = addr
            .send(ToProxyServer::Connect(session.recipient()))
            .await
            .unwrap();
        match id {
            ProxyServerReply::Id(id) => {
                let counter = addr.send(ToProxyServer::OnlineCounter(0)).await.unwrap();
                assert_eq!(counter, ProxyServerReply::OnlineCounter(1));
                let rs = addr.send(ToProxyServer::DisConnect(id)).await.unwrap();
                assert_eq!(rs, ProxyServerReply::Ok);
                let counter = addr.send(ToProxyServer::OnlineCounter(0)).await.unwrap();
                assert_eq!(counter, ProxyServerReply::OnlineCounter(0));
            }
            e => {
                panic!("{:?}", e);
            }
        }
    }
}