Deno 开源了宣称速度极快的 fastwebsockets —— Rust 编写的高性能 WebSocket 协议 (RFC6455 WebSocket) 实现。
fastwebsockets 核心特性
- 可用作原生 WebSocket 帧解析器、成熟的客户端/服务器
use fastwebsockets::{Frame, OpCode, WebSocket};
async fn handle_client(
mut socket: TcpStream,
) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
handshake(&mut socket).await?;
let mut ws = WebSocket::after_handshake(socket);
ws.set_writev(true);
ws.set_auto_close(true);
ws.set_auto_pong(true);
loop {
let frame = ws.read_frame().await?;
match frame {
OpCode::Close => break,
OpCode::Text | OpCode::Binary => {
let frame = Frame::new(true, frame.opcode, None, frame.payload);
ws.write_frame(frame).await?;
}
}
}
Ok(())
}
- 与 Hyper 集成
启用upgrade功能以进行服务器端升级，以及与客户端握手。
use fastwebsockets::upgrade::upgrade;
use hyper::{Request, Body, Response};
async fn server_upgrade(
mut req: Request<Body>,
) -> Result<Response<Body>, Box<dyn std::error::Error + Send + Sync>> {
let (response, fut) = upgrade::upgrade(&mut req)?;
tokio::spawn(async move {
if let Err(e) = handle_client(fut).await {
eprintln!("Error in websocket connection: {}", e);
}
});
Ok(response)
}
使用 handshake 模块进行客户端握手：
use fastwebsockets::handshake;
use fastwebsockets::WebSocket;
use hyper::{Request, Body, upgrade::Upgraded, header::{UPGRADE, CONNECTION}};
use tokio::net::TcpStream;
use std::future::Future;
// Define a type alias for convenience
type Result<T> =
std::result::Result<T, Box<dyn std::error::Error + Send + Sync>>;
async fn connect() -> Result<WebSocket<Upgraded>> {
let stream = TcpStream::connect("localhost:9001").await?;
let req = Request::builder()
.method("GET")
.uri("http://localhost:9001/")
.header("Host", "localhost:9001")
.header(UPGRADE, "websocket")
.header(CONNECTION, "upgrade")
.header(
"Sec-WebSocket-Key",
fastwebsockets:🤝:generate_key(),
)
.header("Sec-WebSocket-Version", "13")
.body(Body::empty())?;
let (ws, _) = handshake::client(&SpawnExecutor, req, stream).await?;
Ok(ws)
}
// Tie hyper's executor to tokio runtime
struct SpawnExecutor;
impl<Fut> hyper::rt::Executor<Fut> for SpawnExecutor
where
Fut: Future + Send + 'static,
Fut::Output: Send + 'static,
{
fn execute(&self, fut: Fut) {
tokio::task::spawn(fut);
}
}
- 通过 Autobahn|TestSuite1 并使用 LLVM 的 libfuzzer 进行模糊测试