rust tcp server frame.
Examples Echo
``` rust
![feature(async_closure)]
use tcpserver::tokio;
use tokio::io::AsyncReadExt;
use tcpserver::XBWrite;
use tcpserver::Builder;
[tokio::main]
async fn main()->Result<(),Box> {
let tcpserver = Builder::new("0.0.0.0:8998")
.setconnectevent(|addr| {
println!("{:?} connect", addr);
true
}).setinputevent(async move |mut reader, peer,| {
let mut buff = [0; 4096];
while let Ok(len) = reader.read(&mut buff).await {
if len==0{
break;
}
println!("{:?}",&buff[..len]);
peer.send(buff[..len].tovec()).await.unwrap();
}
println!("{:?} disconnect",peer.addr());
}).build().await;
tcpserver.start(()).await?;
Ok(())
}
```