0c8ee93d7f
This removes the `tcp` feature from hyper's `Cargo.toml`, and the code it enabled: - `HttpConnector` - `GaiResolver` - `AddrStream` And parts of `Client` and `Server` that used those types. Alternatives will be available in the `hyper-util` crate. Closes #2856 Co-authored-by: MrGunflame <mrgunflame@protonmail.com>
112 lines
3.0 KiB
Rust
112 lines
3.0 KiB
Rust
#![deny(warnings)]
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use hyper::server::conn::Http;
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use std::cell::Cell;
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use std::net::SocketAddr;
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use std::rc::Rc;
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use tokio::net::TcpListener;
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use hyper::body::{Bytes, HttpBody};
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use hyper::header::{HeaderMap, HeaderValue};
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use hyper::service::service_fn;
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use hyper::{Error, Response};
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use std::marker::PhantomData;
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use std::pin::Pin;
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use std::task::{Context, Poll};
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struct Body {
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// Our Body type is !Send and !Sync:
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_marker: PhantomData<*const ()>,
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data: Option<Bytes>,
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}
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impl From<String> for Body {
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fn from(a: String) -> Self {
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Body {
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_marker: PhantomData,
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data: Some(a.into()),
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}
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}
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}
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impl HttpBody for Body {
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type Data = Bytes;
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type Error = Error;
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fn poll_data(
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self: Pin<&mut Self>,
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_: &mut Context<'_>,
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) -> Poll<Option<Result<Self::Data, Self::Error>>> {
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Poll::Ready(self.get_mut().data.take().map(Ok))
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}
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fn poll_trailers(
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self: Pin<&mut Self>,
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_: &mut Context<'_>,
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) -> Poll<Result<Option<HeaderMap<HeaderValue>>, Self::Error>> {
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Poll::Ready(Ok(None))
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}
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}
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fn main() -> Result<(), Box<dyn std::error::Error>> {
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pretty_env_logger::init();
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// Configure a runtime that runs everything on the current thread
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let rt = tokio::runtime::Builder::new_current_thread()
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.enable_all()
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.build()
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.expect("build runtime");
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// Combine it with a `LocalSet, which means it can spawn !Send futures...
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let local = tokio::task::LocalSet::new();
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local.block_on(&rt, run())
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}
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async fn run() -> Result<(), Box<dyn std::error::Error>> {
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let addr: SocketAddr = ([127, 0, 0, 1], 3000).into();
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// Using a !Send request counter is fine on 1 thread...
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let counter = Rc::new(Cell::new(0));
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let listener = TcpListener::bind(addr).await?;
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println!("Listening on http://{}", addr);
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loop {
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let (stream, _) = listener.accept().await?;
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// For each connection, clone the counter to use in our service...
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let cnt = counter.clone();
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let service = service_fn(move |_| {
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let prev = cnt.get();
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cnt.set(prev + 1);
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let value = cnt.get();
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async move { Ok::<_, Error>(Response::new(Body::from(format!("Request #{}", value)))) }
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});
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tokio::task::spawn_local(async move {
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if let Err(err) = Http::new()
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.with_executor(LocalExec)
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.serve_connection(stream, service)
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.await
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{
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println!("Error serving connection: {:?}", err);
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}
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});
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}
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}
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// Since the Server needs to spawn some background tasks, we needed
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// to configure an Executor that can spawn !Send futures...
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#[derive(Clone, Copy, Debug)]
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struct LocalExec;
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impl<F> hyper::rt::Executor<F> for LocalExec
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where
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F: std::future::Future + 'static, // not requiring `Send`
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{
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fn execute(&self, fut: F) {
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// This will spawn into the currently running `LocalSet`.
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tokio::task::spawn_local(fut);
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}
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}
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