mirror of
https://github.com/fatedier/frp.git
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38 lines
1.1 KiB
Go
38 lines
1.1 KiB
Go
// Copyright 2026 The frp Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package limit
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import (
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"fmt"
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"golang.org/x/time/rate"
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)
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// NewBandwidthLimiter creates a limiter whose rate preserves the configured
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// byte limit while keeping the burst representable as an int on all targets.
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func NewBandwidthLimiter(bytes int64) *rate.Limiter {
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if bytes <= 0 {
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return nil
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}
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maxInt := int64(^uint(0) >> 1)
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burst := min(bytes, maxInt)
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return rate.NewLimiter(rate.Limit(float64(bytes)), int(burst))
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}
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func invalidBurstError(burst int) error {
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return fmt.Errorf("invalid limiter burst: %d", burst)
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}
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