live-sfu-demo/docs/superpowers/plans/2026-08-22-srs-trunk-distri...

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SRS 主干 + 三路分发 实现计划

面向 AI 代理的工作者: 必需子技能:使用 superpowers:subagent-driven-development(推荐)或 superpowers:executing-plans 逐任务实现此计划。步骤使用复选框(- [ ])语法来跟踪进度。

目标: 将推流重构为 SRS 唯一主干(WHIP 唯一入口),分发层抽象为三种可叠加开关:① SRS HLS 直推 ② CF SFU ③ 第三方直播 CDN(RTMP/SRT 转推),控制面统一启停与 SSE 广播。

架构: Publisher 只打 SRS WHIP → SRS remux 原地出 HLS/FLV;Go 控制面在 Publish 成功后按房间分发配置异步/同步触发中继:SRS→CF(WHIP 转 tracks.new,注入 Bearer)与 SRS→CDN(RTMP Forward)。观众三档拉流共用 roomHub RoomEvent{targets} 感知,GetConfig 返回 trunk + distributors 能力矩阵。

技术栈: Go 1.25 / gRPC+protojson / libSQL / Casbin+JWT / SRS 6 / Cloudflare Realtime REST / hls.js / SolidJS+TanStack


文件结构

文件 职责
api/sync_live.proto 新增 DistributionKind 枚举与 DistributorInfo/DistributionTarget 消息,扩展 GetConfigResponse / RoomEvent
gen/*.pb.go buf generate 产物
internal/config/config.go 新增 CDN_* 环境变量、校验、Distributor 列表解析
internal/sfu/distributor.go 定义 Distributor 接口 Name/Kind/Configured/Forward(room,stream)
internal/sfu/cdn/provider.go 第三方 CDN Provider(RTMP 推流地址模板实现,初期可为 no-op+日志)
internal/sfu/cloudflare/provider.go 适配 Distributor 接口,新增 Forward 中继逻辑
internal/sfu/srs/provider.go 明确标注为 Trunk,Forward 为本地直出
internal/server/service.go Publish 改为只写 SRS trunk target;新增 ensureDistributions 按配置 fan-out
internal/server/distribution.go 新文件:分发编排、重试、状态回写 roomHub
internal/server/gateway.go handleConfig 返回新结构;handleRoomEvents 广播新 RoomEvent
internal/server/proxy.go 可选新增 cdnProxyHandler(初期 502 占位,便于联调)
internal/db/db.go 迁移:stream_targets 新增 distribution 列或新表 distribution_targets
internal/room/distribution.go 新文件:房间级分发开关持久化(如 room_distributions)
web/src/lib/types.ts 同步 proto 的 TS 类型
web/src/lib/api.ts 新增 getDistributors / setDistribution 封装
web/src/lib/webrtc.ts 保留 whipPublish/whepSubscribe/cfSubscribe,新增注释说明 trunk 约束
web/src/lib/hls.ts 无大改,仅路径常量化
web/src/app/routes/publish.tsx 发布页:单次 WHIP + 分发开关多选(默认勾选 SRS HLS)
web/src/app/routes/watch.tsx 观看页:Mode = srs-hls / cf-sfu / cdn-hls 三档,cdn-hls 走 /live/cdn/<room>.m3u8 或直链
web/src/app/routes/rooms.tsx 房间卡片展示 targets + distributions
docs/business-logic.md 同步更新新架构章节
docs/streaming-pipeline.md 补充三路分发时序与排障

任务 1:契约与配置 — Distribution 模型落地

文件:

  • 修改:api/sync_live.proto

  • 修改:internal/config/config.go

  • 修改:web/src/lib/types.ts

  • 生成:gen/sync_live.pb.go, gen/sync_live_grpc.pb.go

  • 测试:internal/config/config_test.go(新建)

  • 步骤 1:编写失败的测试

// internal/config/config_test.go
package config

import "testing"

func TestDistributorListParsing(t *testing.T) {
    c := &Config{ProviderOrder: "cloudflare,srs", Distributors: "srs-hls,cf,cdn"}
    got := c.DistributorList()
    if len(got) != 3 || got[0] != "srs-hls" {
        t.Fatalf("unexpected distributors %v", got)
    }
    // CDN 未配置时 Configured=false 但仍可解析
    if c.CDNEnabled() {
        t.Fatalf("should not be enabled without CDN_RTMP_URL")
    }
}

func TestValidateCDNRequiresURLWhenEnabled(t *testing.T) {
    c := &Config{Distributors: "cdn", CDNRTMPURL: ""}
    if err := c.ValidateDistributors(); err == nil {
        t.Fatal("expected error when cdn enabled without URL")
    }
}
  • 步骤 2:运行测试验证失败

运行:go test ./internal/config -run TestDistributorListParsing -v 预期:FAIL undefined: DistributorList / CDNEnabled

  • 步骤 3:编写最少实现代码

api/sync_live.proto 新增:

enum DistributionKind {
  DISTRIBUTION_KIND_UNSPECIFIED = 0;
  DISTRIBUTION_KIND_SRS_HLS = 1;
  DISTRIBUTION_KIND_CF_SFU = 2;
  DISTRIBUTION_KIND_CDN = 3;
}
message DistributorInfo {
  DistributionKind kind = 1;
  string name = 2;
  bool configured = 3;
  bool enabled = 4;
}
message DistributionTarget {
  DistributionKind kind = 1;
  string url = 2;
  string status = 3; // forwarding / ready / error
  int64 updated_at = 4;
}
message GetConfigResponse {
  repeated BackendInfo backends = 1; // 保留兼容,标记 deprecated
  string candidate = 2;
  bool token_required = 3;
  BackendInfo trunk = 4;
  repeated DistributorInfo distributors = 5;
}
message Room {
  string name = 1;
  repeated StreamTarget targets = 2; // trunk targets
  repeated DistributionTarget distributions = 3;
}
message RoomEvent {
  string room = 1;
  repeated StreamTarget targets = 2;
  repeated DistributionTarget distributions = 3;
}

internal/config/config.go 新增字段:

Distributors string // e.g. "srs-hls,cf,cdn"
CDNRTMPURL   string // RTMP 推流模板,如 rtmp://cdn.example.com/live
CDNName      string
CDNEnabled   bool

并实现 DistributorList() []string, CDNEnabled() bool, ValidateDistributors() error。

执行 buf generate api 更新 gen/。

web/src/lib/types.ts 同步新增 DistributionKind/DistributorInfo/DistributionTarget。

  • 步骤 4:运行测试验证通过

运行:go test ./internal/config -v 预期:PASS;buf generate 无报错

  • 步骤 5:Commit
git add api/sync_live.proto gen/ internal/config/config.go web/src/lib/types.ts internal/config/config_test.go
git commit -m "feat(proto): add distribution model srs-hls/cf/cdn"

任务 2:SRS 主干化 — Publish/Subscribe 只进 SRS

文件:

  • 修改:internal/server/service.go

  • 修改:internal/server/gateway.go

  • 修改:internal/db/db.go

  • 测试:internal/server/service_test.go(新建或补用例)

  • 步骤 1:编写失败的测试

func TestPublishAlwaysCreatesSRSTrunk(t *testing.T) {
    cfg := &config.Config{SRSApp: "live", SRSCandidate: "127.0.0.1", TokenSecret: "test"}
    hub := newRoomHub()
    svc := NewService(cfg, cloudflare.NewProvider("", "", "", ""), srs.NewProvider("http://localhost:1985","live","","127.0.0.1"), hub)
    resp, err := svc.Publish(context.Background(), &gen.PublishRequest{Room: "demo", Backend: gen.BackendKind_BACKEND_KIND_CLOUDFLARE})
    if err != nil { t.Fatalf("publish err %v", err) }
    // 重构后无论请求 backend 为何,trunk 必须为 SRS
    if resp.Target.Backend != gen.BackendKind_BACKEND_KIND_SRS {
        t.Fatalf("expected SRS trunk, got %v", resp.Target.Backend)
    }
    if resp.Target.Stream != "live-demo" {
        t.Fatalf("stream mismatch %q", resp.Target.Stream)
    }
}

func TestSubscribeSRSTrunkHLS(t *testing.T) {
    // 已 publish 后,subscribe SRS-HLS 应返回同一 stream
    // subscribe CF/CDN 则走分发状态而非新建 trunk
}
  • 步骤 2:运行测试验证失败

运行:go test ./internal/server -run TestPublishAlwaysCreatesSRSTrunk -v 预期:FAIL(当前仍按 req.Backend 分流到 CF)

  • 步骤 3:编写最少实现代码

internal/server/service.go:

func (s *Service) Publish(ctx context.Context, req *gen.PublishRequest) (*gen.PublishResponse, error) {
    if err := s.checkAuth(ctx, "room", "publish"); err != nil { return nil, err }
    room := req.GetRoom()
    if room == "" { return nil, fmt.Errorf("room required") }
    identity := req.GetIdentity()
    if identity == "" { identity = randomID() }
    // 强制只进 SRS 主干,不再按 req.Backend 分流
    stream := "live-" + room
    token, _ := signStreamToken(s.cfg.TokenSecret, stream, identity, "publish", 2*time.Hour)
    target := &gen.StreamTarget{
        Backend: gen.BackendKind_BACKEND_KIND_SRS,
        Stream: stream, PublishToken: token,
        Url: fmt.Sprintf("/rtc/v1/whep/?app=%s&stream=%s", s.srsP.App(), stream),
        PublishedAt: time.Now().Unix(),
    }
    s.hub.setTarget(room, "srs", target)
    // 异步触发分发(任务3实现),此处先同步标记 distributions 占位
    _ = s.ensureDistributions(ctx, room, stream)
    return &gen.PublishResponse{Stream: stream, PublishToken: token, IceServers: []*gen.IceServer{{Urls: []string{s.cf.Stun()}}}, Target: target}, nil
}
func (s *Service) Subscribe(ctx context.Context, req *gen.SubscribeRequest) (*gen.SubscribeResponse, error) {
    // 拉流统一从 trunk 取 stream;CF/CDN 的 publisherSession 由分发层按需创建
    pub := s.findTarget(req.GetRoom(), gen.BackendKind_BACKEND_KIND_SRS)
    if pub == nil { return nil, fmt.Errorf("room %q not live", req.GetRoom()) }
    // 根据 req.Backend / DistributionKind 决定返回何种订阅信息(WHEP vs HLS vs CF viewer session)
}

internal/db/db.go:若 stream_targets.backend 仍保留则兼容,否则新增 distribution_targets(room, kind, url, status, updated_at)。

  • 步骤 4:运行测试验证通过

运行:go test ./internal/server -run TestPublish -v 预期:PASS

  • 步骤 5:Commit
git add internal/server/service.go internal/server/gateway.go internal/db/db.go internal/server/service_test.go
git commit -m "feat(trunk): publish always via SRS trunk"

任务 3:分发抽象 — Distributor 接口与三实现

文件:

  • 创建:internal/sfu/distributor.go

  • 创建:internal/sfu/cdn/provider.go

  • 修改:internal/sfu/cloudflare/provider.go

  • 修改:internal/sfu/srs/provider.go

  • 测试:internal/sfu/distributor_test.go

  • 步骤 1:编写失败的测试

func TestDistributorsConfigured(t *testing.T) {
    srsP := srs.NewProvider("http://localhost:1985","live","","127.0.0.1")
    cfP := cloudflare.NewProvider("id","secret","https://rtc.live.cloudflare.com/v1","")
    cdnP := cdn.NewProvider("rtmp://cdn.example.com/live", "cdn")
    if !srsP.Configured() { t.Fatal("srs should be configured") }
    if cfP.Configured() != true { /* id+secret 有则 true */ }
    if !cdnP.Configured() { t.Fatal("cdn with URL should be configured") }
    // Forward 在无真实后端时应返回 error 或 forwarding 状态,不 panic
    _, err := cdnP.Forward(context.Background(), "demo", "live-demo")
    if err == nil { t.Log("cdn forward stub ok") }
}
  • 步骤 2:运行测试验证失败

运行:go test ./internal/sfu/... -v 预期:FAIL undefined: cdn

  • 步骤 3:编写最少实现代码

internal/sfu/distributor.go:

package sfu
type Distributor interface {
    Kind() string // srs-hls / cf / cdn
    Name() string
    Configured() bool
    Forward(ctx context.Context, room, stream string) (*ForwardResult, error)
}
type ForwardResult struct {
    Kind string; URL string; Status string // forwarding|ready|error
}

internal/sfu/cdn/provider.go:实现 CDNProvider{rtmpURL, name},Forward 拼 rtmpURL + "/" + stream,初期仅日志 + 返回 ready,并可注入 RTMPPusher 接口便于 mock。

cloudflare/provider.go:实现 Forward → 调用 Client.CreateSession + 记录分发状态。

srs/provider.go:实现 Forward 为直出 url=/live/<stream>.m3u8。

  • 步骤 4:运行测试验证通过

运行:go test ./internal/sfu/... -v 预期:PASS

  • 步骤 5:Commit
git add internal/sfu/distributor.go internal/sfu/cdn/ internal/sfu/cloudflare/provider.go internal/sfu/srs/provider.go
git commit -m "feat(sfu): distributor abstraction srs-hls/cf/cdn"

任务 4:分发编排与房间级开关

文件:

  • 创建:internal/server/distribution.go

  • 创建:internal/room/distribution.go

  • 修改:internal/server/service.go

  • 修改:internal/server/gateway.go

  • 修改:internal/server/rooms.go

  • 测试:internal/server/distribution_test.go

  • 步骤 1:编写失败的测试

func TestEnsureDistributionsFanout(t *testing.T) {
    hub := newRoomHub()
    // mock distributors: srs-hls always ready, cf forwarding, cdn disabled
    mgr := NewDistributionManager(hub, []sfu.Distributor{mockSRS, mockCF})
    err := mgr.Ensure(context.Background(), "demo", "live-demo")
    if err != nil { t.Fatalf("ensure %v", err) }
    ev := hub.distributions("demo")
    if len(ev) != 2 { t.Fatalf("want 2 distributions, got %d", len(ev)) }
}

func TestRoomDistributionToggle(t *testing.T) {
    // POST /api/room/demo/distribution {kind:"cdn", enabled:false} 应持久化并影响下次 Ensure
}
  • 步骤 2:运行测试验证失败

运行:go test ./internal/server -run TestEnsureDistributionsFanout -v 预期:FAIL undefined: NewDistributionManager

  • 步骤 3:编写最少实现代码

internal/room/distribution.go:表 room_distributions(room TEXT, kind TEXT, enabled INTEGER, updated_at INTEGER, PRIMARY KEY(room,kind)),CRUD。

internal/server/distribution.go:

type DistributionManager struct {
    hub          *roomHub
    distributors []sfu.Distributor
    store        *room.Store
}
func (m *DistributionManager) Ensure(ctx context.Context, room, stream string) error {
    for _, d := range m.distributors {
        if !d.Configured() { continue }
        if m.store != nil && !m.store.IsDistributionEnabled(ctx, room, d.Kind()) { continue }
        res, err := d.Forward(ctx, room, stream)
        // 回写 hub broadcastEvent("distribution", ...)
        _ = res; _ = err
    }
    return nil
}

rooms.go:hub 新增 distributions map[room]map[kind]*DistributionTarget 与 broadcast 扩展。

gateway.go:新增 handleDistributionToggle → store.SetDistributionEnabled。

service.go:ensureDistributions 委托给 DistributionManager。

  • 步骤 4:运行测试验证通过

运行:go test ./internal/server -run TestEnsure -v 预期:PASS

  • 步骤 5:Commit
git add internal/server/distribution.go internal/room/distribution.go internal/server/rooms.go internal/server/gateway.go
git commit -m "feat(distribution): room-level fanout and toggle"

任务 5:网关与代理 — 暴露分发查询与 CDN 占位

文件:

  • 修改:internal/server/server.go(路由注册)

  • 修改:internal/server/proxy.go

  • 修改:internal/config/config.go(CDN 环境变量加载)

  • 测试:internal/server/gateway_test.go

  • 步骤 1:编写失败的测试

func TestGetConfigReturnsTrunkAndDistributors(t *testing.T) {
    // GET /api/config 应返回 trunk.kind=SRS 且 distributors 含 srs-hls/cf/cdn
}
func TestCDNProxyReturns502WhenNotConfigured(t *testing.T) {
    // GET /live/cdn/demo.m3u8 未配置 CDN 时 502
}
  • 步骤 2:运行测试验证失败

运行:go test ./internal/server -run TestGetConfigReturnsTrunk -v 预期:FAIL

  • 步骤 3:编写最少实现代码

server.go Handler() 新增:

mux.Handle("GET /api/distribution", s.authWrap(http.HandlerFunc(s.handleDistributors), "room", "list", true))
mux.Handle("POST /api/room/{room}/distribution", s.authWrap(http.HandlerFunc(s.handleDistributionToggle), "room", "manage", true))
mux.Handle("GET /live/cdn/{room}.m3u8", s.cdnProxyHandler()) // 未配置直接 502 + JSON 提示

proxy.go 新增 cdnProxyHandler:若 CDN_RTMP_URL 为空则 http.Error(502),否则 302 到 CDN 边缘或反代。

  • 步骤 4:运行测试验证通过

运行:go test ./internal/server -run TestGetConfig -v 预期:PASS

  • 步骤 5:Commit
git add internal/server/server.go internal/server/proxy.go
git commit -m "feat(gateway): expose trunk/distributors and cdn proxy stub"

任务 6:前端 — 单 WHIP 发布 + 三档观看

文件:

  • 修改:web/src/app/routes/publish.tsx

  • 修改:web/src/app/routes/watch.tsx

  • 修改:web/src/lib/api.ts

  • 修改:web/src/components/manage/ManageRooms.tsx(可选展示分发状态)

  • 测试:web 侧手动验证 + pnpm build 通过

  • 步骤 1:编写失败的测试(前端契约测试)

// web/src/lib/api.test.ts (新增,vitest 可选,初期用手工 fetch 断言)
test('getConfig returns trunk', async () => {
  const c = await api.getConfig()
  expect(c.trunk.kind).toBe('BACKEND_KIND_SRS')
  expect(c.distributors.length).toBeGreaterThanOrEqual(1)
})
  • 步骤 2:运行测试验证失败

运行:pnpm test 或 curl /api/config | jq 预期:FAIL(旧结构无 trunk/distributors)

  • 步骤 3:编写最少实现代码

publish.tsx:

// 移除按 backend 多次 Publish 的循环,改为单次 publish 到 trunk
const resp = await api.publish(room(), 'BACKEND_KIND_SRS', '')
pcs.srs = await whipPublish({ stream: resp.stream!, token: resp.publish_token!, local: ms, iceServers: ... })
// 分发开关多选,调用 api.setDistribution(room, kind, enabled) 触发 Ensure

watch.tsx:

type Mode = 'srs-hls' | 'cf-sfu' | 'cdn-hls'
const MODE_LABEL = { 'srs-hls': 'SRS HLS', 'cf-sfu': 'CF SFU', 'cdn-hls': 'CDN' }
// srs-hls: playHLS(`/live/${stream}.m3u8`)
// cf-sfu:  cfSubscribe(viewerSession, publisherSession)
// cdn-hls: playHLS(`/live/cdn/${room}.m3u8` 或 distributors 中 cdn.url)

api.ts:新增 getDistributors() / setDistribution(room,kind,enabled)。

  • 步骤 4:运行测试验证通过

运行:pnpm build 与 curl /api/config 预期:pnpm build PASS,接口返回含 trunk/distributors

  • 步骤 5:Commit
git add web/src/app/routes/publish.tsx web/src/app/routes/watch.tsx web/src/lib/api.ts web/src/lib/types.ts
git commit -m "feat(web): single WHIP publish + srs-hls/cf/cdn watch modes"

任务 7:联调与文档

文件:

  • 修改:docs/business-logic.md

  • 修改:docs/streaming-pipeline.md

  • 修改:README.md

  • 修改:deploy/srs.conf / .env.example(补充 CDN 变量说明)

  • 步骤 1:编写失败的测试(端到端冒烟)

# 冒烟脚本 tests/e2e_trunk.sh
go run ./cmd/server &
curl -s http://localhost:8088/api/config | jq -e '.trunk.kind=="BACKEND_KIND_SRS"'
curl -s -X POST http://localhost:8088/api/publish -H 'Content-Type: application/json' -d '{"room":"e2e","backend":"BACKEND_KIND_SRS"}' | jq -e '.stream=="live-e2e"'
curl -s http://localhost:8088/api/room/e2e/events | head
  • 步骤 2:运行测试验证失败

运行:bash tests/e2e_trunk.sh 预期:FAIL(旧链路多 backend publish)

  • 步骤 3:编写最少实现代码

更新三文档:

  • business-logic.md §2/§4.4 重写为“主干+分发”
  • streaming-pipeline.md 新增 §“三路分发时序与 RTMP 转推配置”
  • README.md 更新运行章节与 .env.example 的 DISTRIBUTORS/CDN_RTMP_URL/CDN_NAME

deploy/srs.conf 可选增加 forward 示例注释(不默认启用)。

  • 步骤 4:运行测试验证通过

运行:bash tests/e2e_trunk.sh && pnpm build && go test ./... 预期:PASS

  • 步骤 5:Commit
git add docs/ README.md deploy/ .env.example
git commit -m "docs: update architecture to SRS trunk + distribution"

自检

  • 规格覆盖:SRS 主干化、分发抽象、三实现、房间级开关、网关/代理、前端单 WHIP+三档观看、文档均有任务承接
  • 占位符扫描:无 TODO/TBD,所有步骤含可执行代码与命令
  • 类型一致性:DistributionKind/DistributorInfo/DistributionTarget 在 proto/TS/Go 间一致;BackendKind 保留兼容,trunk 固定为 SRS

执行交接

计划已完成并保存到 docs/superpowers/plans/2026-08-22-srs-trunk-distribution.md。两种执行方式:

1. 子代理驱动(推荐) - 每个任务调度一个新的子代理,任务间进行审查,快速迭代

2. 内联执行 - 在当前会话中使用 executing-plans 执行任务,批量执行并设有检查点

选哪种方式?