Got error : ConnectionReset: Connection reset by peer (os error 54) using Deno.copy in http proxy function

[diqye]

I want to write a http proxy, but got a error , as below is my all code

const port = 7700;
const server = Deno.listen({ port });

console.log("Proxy stared that listening on " + port);
let decoder = new TextDecoder();
let encoder = new TextEncoder();

async function runProxy(){
  let conn = await server.accept();
  runProxy();
  let firstbit = new Uint8Array(1024);
  await conn.read(firstbit)
  let firstLine = decoder.decode(firstbit).split("\n")[0];
  let urlStr = firstLine.split(" ")[1];
  let url =  new URL(urlStr.startsWith("http")?urlStr:"http://"+urlStr);
  let hostname = url.hostname;
  let port = parseInt(url.port || "80");
  console.log(hostname,port,urlStr)
  let remote = await Deno.connect({
    port,
    hostname
  });
  await remote.write(firstbit);
  Deno.copy(conn,remote);
  Deno.copy(remote,conn);
  // console.log("==============")
  // pipe(remote,conn,"rmeote->conn").then(()=>{
  //   // conn.close();
  //   // remote.close();
  // });
  // pipe(conn,remote,"conn->remote").then(()=>{
  //   // conn.close();
  //   // remote.close();
  // })
}

async function pipe(src:Deno.Conn<Deno.NetAddr>,dist:Deno.Conn<Deno.NetAddr>,flag:string){
  while(true){
    let buf = new Uint8Array(1024);
    try{
      let n = await src.read(buf);
      if(n == null){
        break;
      }else{
        console.log(flag,decoder.decode(buf),n);
        await dist.write(buf)
      }
    }catch(e){
      console.dir(e);
      break;
    }
  }
}

runProxy();

run

➜  myproxy git:(main) ✗ deno run --allow-net --unstable  proxy.ts

then set http proxy in your system