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|
use crate::{handle_packet, CLIENTS, CLIENT_ID_COUNTER};
use crossbeam_channel::{Receiver, Sender};
use karlcommon::{version, ClientboundPacket, ProtoError, ServerboundPacket};
use log::{debug, error, info, warn};
use std::{
io::{self, BufRead, BufReader, ErrorKind, Read, Write},
thread,
};
pub fn handle_connection<F, T>(handle_client: F, arg: T)
where
F: FnOnce(
u32,
(Sender<ClientboundPacket>, Receiver<ClientboundPacket>),
T,
) -> anyhow::Result<()>,
{
let id = CLIENT_ID_COUNTER.fetch_add(1, std::sync::atomic::Ordering::Relaxed);
let (responder, responses) = crossbeam_channel::unbounded();
responder
.send(ClientboundPacket::Handshake {
version: version!(),
})
.unwrap();
info!("client connected: {id}");
CLIENTS.write().unwrap().insert(id, responder.clone());
match handle_client(id, (responder, responses), arg) {
Ok(_) => info!("client ({id}) dropped properly"),
Err(e) => error!("client ({id}) dropped bc error: {e}"),
}
CLIENTS.write().unwrap().remove(&id);
}
pub fn stream<ReadStream: Read, WriteStream: Write + Send + 'static>(
id: u32,
(responder, responses): (Sender<ClientboundPacket>, Receiver<ClientboundPacket>),
(rstream, wstream): (ReadStream, WriteStream),
) -> anyhow::Result<()> {
let mut reader = BufReader::new(rstream);
thread::spawn(move || {
let mut wstream = wstream;
for m in responses {
debug!("{id} -> {m:?}");
match wstream
.write_fmt(format_args!("{}\n", serde_json::to_string(&m).unwrap()))
.map_err(|e| e.kind())
{
Ok(_) => (),
Err(ErrorKind::BrokenPipe) => break,
Err(e) => error!("network error: {:?}", e),
}
}
});
{
let mut buf = String::new();
loop {
if reader.read_line(&mut buf)? == 0 {
break Ok(());
};
match serde_json::from_str::<ServerboundPacket>(buf.as_str()) {
Ok(packet) => {
debug!("{id} <- {packet:?}");
handle_packet(id, packet, responder.clone());
}
Err(err) => {
warn!("client error: {:?}", &err);
responder
.send(ClientboundPacket::Error(ProtoError::FormatError(format!(
"{}",
&err
))))
.map_err(|_| io::Error::from(ErrorKind::InvalidInput))?
}
}
buf.clear();
}
}
}
|
