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use crate::encoding::{request::Request, response::Response};
use anyhow::{anyhow, Result};
use log::debug;
use std::str::FromStr;
use tokio::{
io::{AsyncBufReadExt, AsyncWriteExt, BufReader, BufWriter},
net::{tcp::OwnedWriteHalf, TcpStream},
sync::{
mpsc::{channel, Receiver},
Mutex,
},
};
use super::Transport;
pub struct TcpTransport {
write: Mutex<BufWriter<OwnedWriteHalf>>,
read: Mutex<Receiver<Response>>,
}
impl TcpTransport {
pub async fn new(stream: TcpStream) -> Result<Self> {
let (read, write) = stream.into_split();
let (tx, rx) = channel(16);
tokio::task::spawn(async move {
let mut sock = BufReader::new(read);
let mut message = String::new();
loop {
while !message.ends_with("\r\n\r\n") {
sock.read_line(&mut message).await.unwrap();
}
let mesg = Response::from_str(message.trim()).unwrap();
debug!("<- {mesg}");
tx.send(mesg).await.unwrap();
message.clear();
}
});
Ok(Self {
write: BufWriter::new(write).into(),
read: rx.into(),
})
}
}
impl Transport for TcpTransport {
async fn recv(&self) -> Result<Response> {
self.read.lock().await.recv().await.ok_or(anyhow!("end"))
}
async fn send(&self, request: Request) -> Result<()> {
debug!("-> {request}");
let mut g = self.write.lock().await;
g.write_all(format!("{request}").as_bytes()).await?;
g.flush().await?;
Ok(())
}
}
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