69 lines
1.7 KiB
Rust
69 lines
1.7 KiB
Rust
use arc_swap::ArcSwapOption;
|
|
use governor::DefaultDirectRateLimiter as RateLimiter;
|
|
use governor::Quota;
|
|
use serde::Deserialize;
|
|
use serde::Serialize;
|
|
use std::num::NonZeroU32;
|
|
use std::sync::Arc;
|
|
|
|
#[derive(Default, Serialize, Deserialize, Clone, Copy, Debug, PartialEq, Eq)]
|
|
pub struct LimitsConfig {
|
|
pub upload_bps: Option<NonZeroU32>,
|
|
pub download_bps: Option<NonZeroU32>,
|
|
}
|
|
|
|
struct Limit(ArcSwapOption<RateLimiter>);
|
|
|
|
impl Limit {
|
|
fn new_inner(bps: Option<NonZeroU32>) -> Option<Arc<RateLimiter>> {
|
|
let bps = bps?;
|
|
Some(Arc::new(RateLimiter::direct(Quota::per_second(bps))))
|
|
}
|
|
|
|
fn new(bps: Option<NonZeroU32>) -> Self {
|
|
Self(ArcSwapOption::new(Self::new_inner(bps)))
|
|
}
|
|
|
|
async fn acquire(&self, size: NonZeroU32) -> anyhow::Result<()> {
|
|
let lim = self.0.load().clone();
|
|
if let Some(rl) = lim.as_ref() {
|
|
rl.until_n_ready(size).await?;
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
fn set(&self, limit: Option<NonZeroU32>) {
|
|
let new = Self::new_inner(limit);
|
|
self.0.swap(new);
|
|
}
|
|
}
|
|
|
|
pub struct Limits {
|
|
down: Limit,
|
|
up: Limit,
|
|
}
|
|
|
|
impl Limits {
|
|
pub fn new(config: LimitsConfig) -> Self {
|
|
Self {
|
|
down: Limit::new(config.download_bps),
|
|
up: Limit::new(config.upload_bps),
|
|
}
|
|
}
|
|
|
|
pub async fn prepare_for_upload(&self, len: NonZeroU32) -> anyhow::Result<()> {
|
|
self.up.acquire(len).await
|
|
}
|
|
|
|
pub async fn prepare_for_download(&self, len: NonZeroU32) -> anyhow::Result<()> {
|
|
self.down.acquire(len).await
|
|
}
|
|
|
|
pub fn set_upload_bps(&self, bps: Option<NonZeroU32>) {
|
|
self.up.set(bps);
|
|
}
|
|
|
|
pub fn set_download_bps(&self, bps: Option<NonZeroU32>) {
|
|
self.down.set(bps);
|
|
}
|
|
}
|