feat(agent): #7 真实流量采集 — clash_api 节点总量 → usage_daily
sing-box 该构建未编入 v2ray_api、clash /connections 也不暴露用户,故无法做 准确 per-user 计费。改取节点累计总量(clash downloadTotal/uploadTotal)做 窗口增量,按当前 dp_uuid 均摊上报(单用户=准确,多用户近似,已注释标注)。 - render.go:节点 sing-box 配置加 experimental.clash_api(loopback+secret)。 - ClashUsageSource:轮询 /connections 总量,delta + 重启回绕保护;clash 的 up/down 是代理视角,对调为用户视角(下载→bytes_down)。 - SingBox.DpUUIDs() 供归属;Agent.UseClashUsage() 在 cmd/agent 接上。 已节点 live 验证:usage_daily 实时入库,下载增量正确落 bytes_down。 局限:多 dp_uuid 时均摊(准确计费需重编 sing-box 带 with_v2ray_api)。 Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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@@ -77,6 +77,11 @@ func New(cfg Config, opts ...Option) *Agent {
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// SingBox exposes the underlying manager (tests / introspection).
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func (a *Agent) SingBox() *SingBox { return a.sb }
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// UseClashUsage wires the real usage source: reads node-total traffic from the
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// local clash_api and reports per-window deltas (attributed across dp_uuids).
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// Call after New (needs a.sb). Production main enables this; tests leave it off.
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func (a *Agent) UseClashUsage() { a.usage = newClashUsageSource(a.sb) }
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// NodeUUID returns the enrolled node UUID (empty until Run enrolls).
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func (a *Agent) NodeUUID() string {
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v, _ := a.nodeUUID.Load().(string)
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