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Use LazyLock to parse netrc only once

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j178 2024-10-19 22:45:26 +08:00
parent cfca400c49
commit f4d5fba615
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1 changed files with 41 additions and 37 deletions
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78
crates/uv-auth/src/middleware.rs
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@ -1,4 +1,4 @@
use std::sync::Arc;
use std::sync::{Arc, LazyLock};
use http::{Extensions, StatusCode};
use url::Url;
@ -16,11 +16,38 @@ use tracing::{debug, trace, warn};
/// Strategy for loading netrc files.
enum NetrcMode {
Automatic,
Enabled(netrc::Netrc),
Automatic(LazyLock<Option<Netrc>>),
Enabled(Netrc),
Disabled,
}
impl Default for NetrcMode {
fn default() -> Self {
NetrcMode::Automatic(LazyLock::new(|| match Netrc::new() {
Ok(netrc) => Some(netrc),
Err(netrc::Error::Io(err)) if err.kind() == std::io::ErrorKind::NotFound => {
debug!("No netrc file found");
None
}
Err(err) => {
warn!("Error reading netrc file: {err}");
None
}
}))
}
}
impl NetrcMode {
/// Get the parsed netrc file if enabled.
fn get(&self) -> Option<&Netrc> {
match self {
NetrcMode::Automatic(lock) => lock.as_ref(),
NetrcMode::Enabled(netrc) => Some(netrc),
NetrcMode::Disabled => None,
}
}
}
/// A middleware that adds basic authentication to requests.
///
/// Uses a cache to propagate credentials from previously seen requests and
@ -37,7 +64,7 @@ pub struct AuthMiddleware {
impl AuthMiddleware {
pub fn new() -> Self {
Self {
netrc: NetrcMode::Automatic,
netrc: NetrcMode::default(),
keyring: None,
cache: None,
only_authenticated: false,
@ -372,39 +399,16 @@ impl AuthMiddleware {
}
// Netrc support based on: <https://github.com/gribouille/netrc>.
let credentials = if let Some(credentials) = match self.netrc {
NetrcMode::Enabled(ref netrc) => {
debug!("Checking netrc for credentials for {url}");
Credentials::from_netrc(
netrc,
url,
credentials
.as_ref()
.and_then(|credentials| credentials.username()),
)
}
NetrcMode::Automatic => match Netrc::new() {
Ok(netrc) => {
debug!("Checking netrc for credentials for {url}");
Credentials::from_netrc(
&netrc,
url,
credentials
.as_ref()
.and_then(|credentials| credentials.username()),
)
}
Err(netrc::Error::Io(err)) if err.kind() == std::io::ErrorKind::NotFound => {
debug!("No netrc file found");
None
}
Err(err) => {
warn!("Error reading netrc file: {err}");
None
}
},
NetrcMode::Disabled => None,
} {
let credentials = if let Some(credentials) = self.netrc.get().and_then(|netrc| {
debug!("Checking netrc for credentials for {url}");
Credentials::from_netrc(
netrc,
url,
credentials
.as_ref()
.and_then(|credentials| credentials.username()),
)
}) {
debug!("Found credentials in netrc file for {url}");
Some(credentials)
// N.B. The keyring provider performs lookups for the exact URL then