rust tcp server frame.

Examples Echo

``` rust

![feature(async_closure)]

use tokio::io::AsyncReadExt; use xbinary::XBWrite; use tcpserver::Builder;

[tokio::test]

async fn main() { let tcpserver = Builder::new("0.0.0.0:5555") .setconnectevent(|addr| { println!("{:?} connect", addr); true }).setinputevent(async move |mut peer| { let mut buff = [0; 4096];

        while let Ok(len) = peer.reader.read(&mut buff).await {
            println!("{:?}",&buff[..len]);
            let mut writer = XBWrite::new();
            writer.write(&buff[..len]);
            peer.send_mut(writer).await.unwrap();
        }
        println!("{:?} disconnect",peer.addr);
    }).build().await;

tcpserver.start().await.unwrap();

}

```