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imgproxy/timer.go
2018-10-09 19:55:19 +06:00

30 lines
589 B
Go

package main
import (
"context"
"fmt"
"time"
)
var timerSinceCtxKey = ctxKey("timerSince")
func startTimer(d time.Duration) (context.Context, context.CancelFunc) {
return context.WithTimeout(
context.WithValue(context.Background(), timerSinceCtxKey, time.Now()),
d,
)
}
func getTimerSince(ctx context.Context) time.Duration {
return time.Since(ctx.Value(timerSinceCtxKey).(time.Time))
}
func checkTimeout(ctx context.Context) {
select {
case <-ctx.Done():
panic(newError(503, fmt.Sprintf("Timeout after %v", getTimerSince(ctx)), "Timeout"))
default:
// Go ahead
}
}