mirror of https://github.com/XTLS/Xray-core
52 lines
1.1 KiB
Go
52 lines
1.1 KiB
Go
package router
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import (
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"context"
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"github.com/xtls/xray-core/common/dice"
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"github.com/xtls/xray-core/features/extension"
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"github.com/xtls/xray-core/features/outbound"
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)
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type BalancingStrategy interface {
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PickOutbound([]string) string
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}
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type RandomStrategy struct{}
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func (s *RandomStrategy) PickOutbound(tags []string) string {
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n := len(tags)
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if n == 0 {
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panic("0 tags")
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}
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return tags[dice.Roll(n)]
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}
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type Balancer struct {
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selectors []string
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strategy BalancingStrategy
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ohm outbound.Manager
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}
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func (b *Balancer) PickOutbound() (string, error) {
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hs, ok := b.ohm.(outbound.HandlerSelector)
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if !ok {
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return "", newError("outbound.Manager is not a HandlerSelector")
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}
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tags := hs.Select(b.selectors)
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if len(tags) == 0 {
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return "", newError("no available outbounds selected")
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}
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tag := b.strategy.PickOutbound(tags)
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if tag == "" {
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return "", newError("balancing strategy returns empty tag")
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}
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return tag, nil
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}
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func (b *Balancer) InjectContext(ctx context.Context) {
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if contextReceiver, ok := b.strategy.(extension.ContextReceiver); ok {
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contextReceiver.InjectContext(ctx)
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}
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}
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