14dc899b02
* feat: check unused package update edganiukov/fcm to appleboy/go-fcm * update readme Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com> * update comment Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
35 lines
506 B
Go
35 lines
506 B
Go
package fcm
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import (
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"net"
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"time"
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)
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const (
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minBackoff = 100 * time.Millisecond
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maxBackoff = 1 * time.Minute
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factor = 2.7
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)
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func retry(fn func() error, attempts int) error {
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var attempt int
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for {
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err := fn()
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if err == nil {
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return nil
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}
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if tErr, ok := err.(net.Error); !ok || !tErr.Temporary() {
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return err
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}
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attempt++
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backoff := minBackoff * time.Duration(attempt*attempt)
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if attempt > attempts || backoff > maxBackoff {
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return err
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}
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time.Sleep(backoff)
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}
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}
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