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random.go
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random.go
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// Copyright 2019-2023 The Liqo Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package utils
import (
"math/rand"
"time"
)
const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
// RandomString generates a random string of the given length.
func RandomString(n int) string {
b := make([]byte, n)
for i := range b {
b[i] = letterBytes[rand.Int63()%int64(len(letterBytes))] //nolint:gosec // don't need crypto/rand
}
return string(b)
}
// RandomJitter returns a duration between duration and duration + maxJitter.
func RandomJitter(duration, maxJitter time.Duration) time.Duration {
return (duration + time.Duration(rand.Float64()*float64(maxJitter))).Truncate(time.Millisecond) //nolint:gosec // don't need crypto/rand
}