mirror of
https://github.com/actix/actix-extras.git
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147 lines
4.8 KiB
Markdown
147 lines
4.8 KiB
Markdown
# Actix web [](https://travis-ci.org/actix/actix-web) [](https://ci.appveyor.com/project/fafhrd91/actix-web-hdy9d/branch/master) [](https://codecov.io/gh/actix/actix-web) [](https://crates.io/crates/actix-web)
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Asynchronous web framework for [Actix](https://github.com/actix/actix).
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* [API Documentation (Development)](http://actix.github.io/actix-web/actix_web/)
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* [API Documentation (Releases)](https://docs.rs/actix-web/)
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* Cargo package: [actix-web](https://crates.io/crates/actix-web)
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* Minimum supported Rust version: 1.20 or later
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---
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Actix web is licensed under the [Apache-2.0 license](http://opensource.org/licenses/APACHE-2.0).
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## Features
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* Supported HTTP/1 and HTTP/2 protocols
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* Streaming and pipelining
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* Keep-alive and slow requests handling
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* [WebSockets](https://actix.github.io/actix-web/actix_web/ws/index.html)
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* Transparent content compression/decompression (br, gzip, deflate)
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* Configurable request routing
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* Multipart streams
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* Middlewares
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## Usage
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To use `actix-web`, add this to your `Cargo.toml`:
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```toml
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[dependencies]
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actix-web = "0.2"
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```
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## HTTP/2
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Actix web automatically upgrades connection to `http/2` if possible.
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### Negotiation
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`HTTP/2` protocol over tls without prior knowlage requires
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[tls alpn](https://tools.ietf.org/html/rfc7301). At the moment only
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`rust-openssl` supports alpn.
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```toml
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[dependencies]
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actix-web = { git = "https://github.com/actix/actix-web", features=["alpn"] }
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```
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Upgrade to `http/2` schema described in
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[rfc section 3.2](https://http2.github.io/http2-spec/#rfc.section.3.2) is not supported.
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Starting `http/2` with prior knowledge is supported for both clear text connection
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and tls connection. [rfc section 3.4](https://http2.github.io/http2-spec/#rfc.section.3.4)
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[tls example](https://github.com/actix/actix-web/tree/master/examples/tls)
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## Example
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* [Basic](https://github.com/actix/actix-web/tree/master/examples/basic.rs)
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* [Stateful](https://github.com/actix/actix-web/tree/master/examples/state.rs)
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* [Mulitpart streams](https://github.com/actix/actix-web/tree/master/examples/multipart)
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* [Simple websocket session](https://github.com/actix/actix-web/tree/master/examples/websocket.rs)
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* [Tcp/Websocket chat](https://github.com/actix/actix-web/tree/master/examples/websocket-chat)
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* [SockJS Server](https://github.com/actix/actix-sockjs)
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```rust
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extern crate actix;
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extern crate actix_web;
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extern crate env_logger;
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use actix::*;
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use actix_web::*;
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struct MyWebSocket;
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/// Actor with http context
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impl Actor for MyWebSocket {
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type Context = HttpContext<Self>;
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}
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/// Http route handler
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impl Route for MyWebSocket {
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type State = ();
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fn request(req: &mut HttpRequest,
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payload: Payload, ctx: &mut HttpContext<Self>) -> RouteResult<Self>
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{
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// websocket handshake
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let resp = ws::handshake(req)?;
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// send HttpResponse back to peer
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ctx.start(resp);
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// convert bytes stream to a stream of `ws::Message` and handle stream
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ctx.add_stream(ws::WsStream::new(payload));
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Reply::async(MyWebSocket)
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}
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}
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/// Standard actix's stream handler for a stream of `ws::Message`
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impl StreamHandler<ws::Message> for MyWebSocket {
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fn started(&mut self, ctx: &mut Self::Context) {
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println!("WebSocket session openned");
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}
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fn finished(&mut self, ctx: &mut Self::Context) {
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println!("WebSocket session closed");
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}
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}
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impl Handler<ws::Message> for MyWebSocket {
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fn handle(&mut self, msg: ws::Message, ctx: &mut HttpContext<Self>)
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-> Response<Self, ws::Message>
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{
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// process websocket messages
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println!("WS: {:?}", msg);
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match msg {
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ws::Message::Ping(msg) => ws::WsWriter::pong(ctx, &msg),
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ws::Message::Text(text) => ws::WsWriter::text(ctx, &text),
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ws::Message::Binary(bin) => ws::WsWriter::binary(ctx, bin),
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ws::Message::Closed | ws::Message::Error => {
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ctx.stop();
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}
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_ => (),
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}
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Self::empty()
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}
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}
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fn main() {
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::std::env::set_var("RUST_LOG", "actix_web=info");
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let _ = env_logger::init();
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let sys = actix::System::new("ws-example");
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HttpServer::new(
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Application::default("/")
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// enable logger
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.middleware(middlewares::Logger::default())
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// websocket route
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.resource("/ws/", |r| r.get::<MyWebSocket>())
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.route_handler("/", StaticFiles::new("examples/static/", true)))
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.serve::<_, ()>("127.0.0.1:8080").unwrap();
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Arbiter::system().send(msgs::SystemExit(0));
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let _ = sys.run();
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}
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```
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