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perf(ext/fetch): use
trust_dns_resolver instead of default `GaiReso…
…lver`
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,116 @@ | ||
| // Copyright 2018-2024 the Deno authors. All rights reserved. MIT license. | ||
| use std::future::Future; | ||
| use std::io; | ||
| use std::net::SocketAddr; | ||
| use std::pin::Pin; | ||
| use std::task::Poll; | ||
| use std::task::{self}; | ||
| use std::vec; | ||
|
|
||
| use hyper_util::client::legacy::connect::dns::GaiResolver; | ||
| use hyper_util::client::legacy::connect::dns::Name; | ||
| use tokio::task::JoinHandle; | ||
| use tower::Service; | ||
| use trust_dns_resolver::error::ResolveError; | ||
| use trust_dns_resolver::name_server::GenericConnector; | ||
| use trust_dns_resolver::name_server::TokioRuntimeProvider; | ||
| use trust_dns_resolver::AsyncResolver; | ||
|
|
||
| #[derive(Clone, Debug)] | ||
| pub enum Resolver { | ||
| /// A resolver using blocking `getaddrinfo` calls in a threadpool. | ||
| Gai(GaiResolver), | ||
| /// trust_dns_resolver userspace resolver. | ||
| Trust(AsyncResolver<GenericConnector<TokioRuntimeProvider>>), | ||
| } | ||
|
|
||
| impl Default for Resolver { | ||
| fn default() -> Self { | ||
| Self::gai() | ||
| } | ||
| } | ||
|
|
||
| impl Resolver { | ||
| pub fn gai() -> Self { | ||
| Self::Gai(GaiResolver::new()) | ||
| } | ||
|
|
||
| /// Create a [`AsyncResolver`] from system conf. | ||
| pub fn trust() -> Result<Self, ResolveError> { | ||
| Ok(Self::Trust( | ||
| trust_dns_resolver::AsyncResolver::tokio_from_system_conf()?, | ||
| )) | ||
| } | ||
|
|
||
| pub fn trust_from_async_resolver( | ||
| resolver: AsyncResolver<GenericConnector<TokioRuntimeProvider>>, | ||
| ) -> Self { | ||
| Self::Trust(resolver) | ||
| } | ||
| } | ||
|
|
||
| type SocketAddrs = vec::IntoIter<SocketAddr>; | ||
|
|
||
| pub struct ResolveFut { | ||
| inner: JoinHandle<Result<SocketAddrs, io::Error>>, | ||
| } | ||
|
|
||
| impl Future for ResolveFut { | ||
| type Output = Result<SocketAddrs, io::Error>; | ||
|
|
||
| fn poll( | ||
| mut self: Pin<&mut Self>, | ||
| cx: &mut task::Context<'_>, | ||
| ) -> Poll<Self::Output> { | ||
| Pin::new(&mut self.inner).poll(cx).map(|res| match res { | ||
| Ok(Ok(addrs)) => Ok(addrs), | ||
| Ok(Err(e)) => Err(e), | ||
| Err(join_err) => { | ||
| if join_err.is_cancelled() { | ||
| Err(io::Error::new(io::ErrorKind::Interrupted, join_err)) | ||
| } else { | ||
| panic!("gai background task failed: {:?}", join_err) | ||
| } | ||
| } | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| impl Service<Name> for Resolver { | ||
| type Response = SocketAddrs; | ||
| type Error = io::Error; | ||
| type Future = ResolveFut; | ||
|
|
||
| fn poll_ready( | ||
| &mut self, | ||
| _cx: &mut task::Context<'_>, | ||
| ) -> Poll<Result<(), io::Error>> { | ||
| Poll::Ready(Ok(())) | ||
| } | ||
|
|
||
| fn call(&mut self, name: Name) -> Self::Future { | ||
| let task = match self { | ||
| Resolver::Gai(gai_resolver) => { | ||
| let mut resolver = gai_resolver.clone(); | ||
| tokio::spawn(async move { | ||
| let result = resolver.call(name).await?; | ||
| let x: Vec<_> = result.into_iter().collect(); | ||
| let iter: SocketAddrs = x.into_iter(); | ||
| Ok(iter) | ||
| }) | ||
| } | ||
| Resolver::Trust(async_resolver) => { | ||
| let resolver = async_resolver.clone(); | ||
| tokio::spawn(async move { | ||
| let result = resolver.lookup_ip(name.as_str()).await?; | ||
|
|
||
| let x: Vec<_> = | ||
| result.into_iter().map(|x| SocketAddr::new(x, 0)).collect(); | ||
| let iter: SocketAddrs = x.into_iter(); | ||
| Ok(iter) | ||
| }) | ||
| } | ||
| }; | ||
| ResolveFut { inner: task } | ||
| } | ||
| } |
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