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42 lines
944 B
Rust
42 lines
944 B
Rust
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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
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use std::future::Future;
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use std::time::Duration;
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pub fn retry<
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F: FnMut() -> Fut,
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T,
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E,
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Fut: Future<Output = Result<T, E>>,
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ShouldRetry: FnMut(&E) -> bool,
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>(
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mut f: F,
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mut should_retry: ShouldRetry,
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) -> impl Future<Output = Result<T, E>> {
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const WAITS: [Duration; 3] = [
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Duration::from_millis(100),
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Duration::from_millis(250),
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Duration::from_millis(500),
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];
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let mut waits = WAITS.into_iter();
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async move {
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let mut first_result = None;
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loop {
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let result = f().await;
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match result {
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Ok(r) => return Ok(r),
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Err(e) if !should_retry(&e) => return Err(e),
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_ => {}
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}
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if first_result.is_none() {
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first_result = Some(result);
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}
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let Some(wait) = waits.next() else {
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return first_result.unwrap();
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};
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tokio::time::sleep(wait).await;
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}
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}
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}
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