Server tools to backfill, tail, mirror, and verify PLC logs
grossly manage maintenance task from middleware
+32
-2
+32
-2
src/ratelimit.rs
+32
-2
src/ratelimit.rs
···
12
12
sync::{Arc, LazyLock},
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13
time::Duration,
14
14
};
15
+
use tokio::sync::oneshot;
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static CLOCK: LazyLock<DefaultClock> = LazyLock::new(DefaultClock::default);
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18
···
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/// Once the rate limit has been reached, the middleware will respond with
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/// status code 429 (too many requests) and a `Retry-After` header with the amount
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/// of time that needs to pass before another request will be allowed.
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-
#[derive(Debug, Clone)]
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+
#[derive(Debug)]
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pub struct GovernorMiddleware {
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+
#[allow(dead_code)]
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+
stop_on_drop: oneshot::Sender<()>,
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limiters: Arc<IpLimiters>,
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79
}
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impl GovernorMiddleware {
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+
/// Limit request rates
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+
///
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/// a little gross but this spawns a tokio task for housekeeping:
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+
/// https://docs.rs/governor/latest/governor/struct.RateLimiter.html#keyed-rate-limiters---housekeeping
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pub fn new(quota: Quota) -> Self {
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+
let limiters = Arc::new(IpLimiters::new(quota));
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+
let (stop_on_drop, mut stopped) = oneshot::channel();
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+
tokio::task::spawn({
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+
let limiters = limiters.clone();
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+
async move {
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+
loop {
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+
tokio::select! {
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+
_ = &mut stopped => break,
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+
_ = tokio::time::sleep(Duration::from_secs(60)) => {},
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+
};
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+
log::debug!(
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+
"limiter sizes before housekeeping: {}/ip {}/v6_56 {}/v6_48",
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+
limiters.per_ip.len(),
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+
limiters.ip6_56.len(),
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+
limiters.ip6_48.len(),
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+
);
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+
limiters.per_ip.retain_recent();
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+
limiters.ip6_56.retain_recent();
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+
limiters.ip6_48.retain_recent();
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+
}
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+
}
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+
});
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Self {
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-
limiters: Arc::new(IpLimiters::new(quota)),
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+
stop_on_drop,
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+
limiters,
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112
}
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113
}
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}