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Improve documentation for actix-web-actors (#2788)

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nerix 2022-06-26 18:45:02 +02:00 committed by GitHub
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4 changed files with 210 additions and 13 deletions
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3
actix-web-actors/Cargo.toml
View file

@ -29,6 +29,9 @@ tokio = { version = "1.13.1", features = ["sync"] }
actix-rt = "2.2"
actix-test = "0.1.0-beta.13"
awc = { version = "3", default-features = false }
actix-web = { version = "4", features = ["macros"] }
mime = "0.3"
env_logger = "0.9"
futures-util = { version = "0.3.7", default-features = false }

56
actix-web-actors/src/context.rs
View file

@ -14,6 +14,58 @@ use futures_core::Stream;
use tokio::sync::oneshot::Sender;
/// Execution context for HTTP actors
///
/// # Example
///
/// A demonstration of [server-sent events](https://developer.mozilla.org/docs/Web/API/Server-sent_events) using actors:
///
/// ```no_run
/// use std::time::Duration;
///
/// use actix::{Actor, AsyncContext};
/// use actix_web::{get, http::header, App, HttpResponse, HttpServer};
/// use actix_web_actors::HttpContext;
/// use bytes::Bytes;
///
/// struct MyActor {
/// count: usize,
/// }
///
/// impl Actor for MyActor {
/// type Context = HttpContext<Self>;
///
/// fn started(&mut self, ctx: &mut Self::Context) {
/// ctx.run_later(Duration::from_millis(100), Self::write);
/// }
/// }
///
/// impl MyActor {
/// fn write(&mut self, ctx: &mut HttpContext<Self>) {
/// self.count += 1;
/// if self.count > 3 {
/// ctx.write_eof()
/// } else {
/// ctx.write(Bytes::from(format!("event: count\ndata: {}\n\n", self.count)));
/// ctx.run_later(Duration::from_millis(100), Self::write);
/// }
/// }
/// }
///
/// #[get("/")]
/// async fn index() -> HttpResponse {
/// HttpResponse::Ok()
/// .insert_header(header::ContentType(mime::TEXT_EVENT_STREAM))
/// .streaming(HttpContext::create(MyActor { count: 0 }))
/// }
///
/// #[actix_web::main]
/// async fn main() -> std::io::Result<()> {
/// HttpServer::new(|| App::new().service(index))
/// .bind(("127.0.0.1", 8080))?
/// .run()
/// .await
/// }
/// ```
pub struct HttpContext<A>
where
A: Actor<Context = HttpContext<A>>,
@ -210,7 +262,7 @@ mod tests {
type Context = HttpContext<Self>;
fn started(&mut self, ctx: &mut Self::Context) {
ctx.run_later(Duration::from_millis(100), |slf, ctx| slf.write(ctx));
ctx.run_later(Duration::from_millis(100), Self::write);
}
}
@ -221,7 +273,7 @@ mod tests {
ctx.write_eof()
} else {
ctx.write(Bytes::from(format!("LINE-{}", self.count)));
ctx.run_later(Duration::from_millis(100), |slf, ctx| slf.write(ctx));
ctx.run_later(Duration::from_millis(100), Self::write);
}
}
}

55
actix-web-actors/src/lib.rs
View file

@ -1,4 +1,59 @@
//! Actix actors support for Actix Web.
//!
//! # Examples
//!
//! ```no_run
//! use actix::{Actor, StreamHandler};
//! use actix_web::{get, web, App, Error, HttpRequest, HttpResponse, HttpServer};
//! use actix_web_actors::ws;
//!
//! /// Define Websocket 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),
//! _ => (),
//! }
//! }
//! }
//!
//! #[get("/ws")]
//! async fn index(req: HttpRequest, stream: web::Payload) -> Result<HttpResponse, Error> {
//! ws::start(MyWs, &req, stream)
//! }
//!
//! #[actix_web::main]
//! async fn main() -> std::io::Result<()> {
//! HttpServer::new(|| App::new().service(index))
//! .bind(("127.0.0.1", 8080))?
//! .run()
//! .await
//! }
//! ```
//!
//! # Documentation & Community Resources
//! In addition to this API documentation, several other resources are available:
//!
//! * [Website & User Guide](https://actix.rs/)
//! * [Documentation for `actix_web`](actix_web)
//! * [Examples Repository](https://github.com/actix/examples)
//! * [Community Chat on Discord](https://discord.gg/NWpN5mmg3x)
//!
//! To get started navigating the API docs, you may consider looking at the following pages first:
//!
//! * [`ws`]: This module provides actor support for WebSockets.
//!
//! * [`HttpContext`]: This struct provides actor support for streaming HTTP responses.
//!
#![deny(rust_2018_idioms, nonstandard_style)]
#![warn(future_incompatible)]

109
actix-web-actors/src/ws.rs
View file

@ -1,4 +1,60 @@
//! Websocket integration.
//!
//! # Examples
//!
//! ```no_run
//! use actix::{Actor, StreamHandler};
//! use actix_web::{get, web, App, Error, HttpRequest, HttpResponse, HttpServer};
//! use actix_web_actors::ws;
//!
//! /// Define Websocket 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),
//! _ => (),
//! }
//! }
//! }
//!
//! #[get("/ws")]
//! async fn websocket(req: HttpRequest, stream: web::Payload) -> Result<HttpResponse, Error> {
//! ws::start(MyWs, &req, stream)
//! }
//!
//! const MAX_FRAME_SIZE: usize = 16_384; // 16KiB
//!
//! #[get("/custom-ws")]
//! async fn custom_websocket(req: HttpRequest, stream: web::Payload) -> Result<HttpResponse, Error> {
//! // Create a Websocket session with a specific max frame size, and protocols.
//! ws::WsResponseBuilder::new(MyWs, &req, stream)
//! .frame_size(MAX_FRAME_SIZE)
//! .protocols(&["A", "B"])
//! .start()
//! }
//!
//! #[actix_web::main]
//! async fn main() -> std::io::Result<()> {
//! HttpServer::new(|| {
//! App::new()
//! .service(websocket)
//! .service(custom_websocket)
//! })
//! .bind(("127.0.0.1", 8080))?
//! .run()
//! .await
//! }
//! ```
//!
use std::{
collections::VecDeque,
@ -41,20 +97,51 @@ use tokio::sync::oneshot;
///
/// # Examples
///
/// Create a Websocket session response with default configuration.
/// ```ignore
/// WsResponseBuilder::new(WsActor, &req, stream).start()
/// ```
/// ```no_run
/// # use actix::{Actor, StreamHandler};
/// # use actix_web::{get, web, App, Error, HttpRequest, HttpResponse, HttpServer};
/// # use actix_web_actors::ws;
/// #
/// # 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) {}
/// # }
/// #
/// #[get("/ws")]
/// async fn websocket(req: HttpRequest, stream: web::Payload) -> Result<HttpResponse, Error> {
/// ws::WsResponseBuilder::new(MyWs, &req, stream).start()
/// }
///
/// Create a Websocket session with a specific max frame size, [`Codec`], and protocols.
/// ```ignore
/// const MAX_FRAME_SIZE: usize = 16_384; // 16KiB
///
/// ws::WsResponseBuilder::new(WsActor, &req, stream)
/// .codec(Codec::new())
/// .protocols(&["A", "B"])
/// .frame_size(MAX_FRAME_SIZE)
/// .start()
/// #[get("/custom-ws")]
/// async fn custom_websocket(req: HttpRequest, stream: web::Payload) -> Result<HttpResponse, Error> {
/// // Create a Websocket session with a specific max frame size, codec, and protocols.
/// ws::WsResponseBuilder::new(MyWs, &req, stream)
/// .codec(actix_http::ws::Codec::new())
/// // This will overwrite the codec's max frame-size
/// .frame_size(MAX_FRAME_SIZE)
/// .protocols(&["A", "B"])
/// .start()
/// }
/// #
/// # #[actix_web::main]
/// # async fn main() -> std::io::Result<()> {
/// # HttpServer::new(|| {
/// # App::new()
/// # .service(websocket)
/// # .service(custom_websocket)
/// # })
/// # .bind(("127.0.0.1", 8080))?
/// # .run()
/// # .await
/// # }
/// ```
pub struct WsResponseBuilder<'a, A, T>
where