协议

Websockets

actix web通过actix-web-actor支持websocket，转换请求的Payload到ws::Message然后使用流接合器处理实际的消息，但是对于处理websocket和http actor太简单了。

use actix::{Actor, StreamHandler};
use actix_web::{web, App, Error, HttpRequest, HttpResponse, HttpServer};
use actix_web_actors::ws;

/// Define HTTP actor
struct MyWs;

impl Actor for MyWs {
    type Context = ws::WebsocketContext<Self>;
}

/// Handler for ws::Message message
impl StreamHandler<Result<ws::Message, ws::ProtocolError>> for MyWs {
    fn handle(&mut self, msg: Result<ws::Message, ws::ProtocolError>, ctx: &mut Self::Context) {
        match msg {
            Ok(ws::Message::Ping(msg)) => ctx.pong(&msg),
            Ok(ws::Message::Text(text)) => ctx.text(text),
            Ok(ws::Message::Binary(bin)) => ctx.binary(bin),
            _ => (),
        }
    }
}

async fn index(req: HttpRequest, stream: web::Payload) -> Result<HttpResponse, Error> {
    let resp = ws::start(MyWs {}, &req, stream);
    println!("{:?}", resp);
    resp
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    HttpServer::new(|| App::new().route("/ws/", web::get().to(index)))
        .bind(("127.0.0.1", 8080))?
        .run()
        .await
}

如果可能actix-web自动更新连接到HTTP/2。

协商

无论是rustls还是openssl特性开启，HttpServer提供了bind_restls方法和bind_openssl方法。

[dependencies]
actix-web = { version = "4", features = ["openssl"] }
openssl = { version = "0.10", features = ["v110"] }

use actix_web::{web, App, HttpRequest, HttpServer, Responder};
use openssl::ssl::{SslAcceptor, SslFiletype, SslMethod};

async fn index(_req: HttpRequest) -> impl Responder {
    "Hello."
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    // load TLS keys
    // to create a self-signed temporary cert for testing:
    // `openssl req -x509 -newkey rsa:4096 -nodes -keyout key.pem -out cert.pem -days 365 -subj '/CN=localhost'`
    let mut builder = SslAcceptor::mozilla_intermediate(SslMethod::tls()).unwrap();
    builder
        .set_private_key_file("key.pem", SslFiletype::PEM)
        .unwrap();
    builder.set_certificate_chain_file("cert.pem").unwrap();

    HttpServer::new(|| App::new().route("/", web::get().to(index)))
        .bind_openssl("127.0.0.1:8080", builder)?
        .run()
        .await
}