config: enable auto_pull and set gateway URL/token in edge.yaml

cmd/edge-agent/main.go

@@ -21,8 +21,8 @@ func main() {
 	flag.Parse()
 
 	cfg := config.Load(*cfgPath)
-	log.Printf("edge-agent start id=%s uuid=%s cloud=%s mqtt=%s",
-		cfg.EdgeID, cfg.GetDeviceIdentity(), cfg.CloudURL, cfg.MqttBroker)
+	log.Printf("edge-agent start id=%s uuid=%s cloud=%s mqtt=%s auto_pull=%v",
+		cfg.EdgeID, cfg.GetDeviceIdentity(), cfg.CloudURL, cfg.MqttBroker, cfg.AutoPull)
 
 	ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
 	defer cancel()
@@ -43,8 +43,17 @@ func main() {
 	mqttMgr := control.NewMqttManager(cfg)
 	run(mqttMgr.Run)
 
+	// 1.5 Stream Puller (Optional: Dynamic URL fetching)
+	var puller *stream.Puller
+	if cfg.AutoPull {
+		puller = stream.NewPuller(cfg)
+		puller.StartHeartbeatLoop()
+		defer puller.Stop()
+		log.Println("puller: auto-pull mode enabled")
+	}
+
 	// 2. Stream Ingestion (Dynamic)
-	run(stream.NewStreamManager(cfg, frames, mqttMgr.GetUpdates()).Run)
+	run(stream.NewStreamManager(cfg, puller, frames, mqttMgr.GetUpdates()).Run)
 
 	// 3. Inference (Dynamic Workers)
 	run(infer.NewClient(cfg, frames, events, mqttMgr.GetUpdates()).Run)

config/edge.yaml

@@ -4,9 +4,12 @@ cloud_url: http://101.36.73.102:8004
 mqtt_broker: tcp://101.36.73.102:1883
 mqtt_user: ""
 mqtt_pass: ""
-edge_token: ""
-rtsp_urls:
-    - http://101.36.73.102:8080/rtp/34020000002000000003_34020000001310000001.live.flv
+edge_token: "edge-token-001"
+rtsp_urls: []
+# 自动按需拉流配置
+stream_pull_url: http://101.36.73.102:9000
+stream_protocol: flv
+auto_pull: true
 infer_socket: /tmp/edge-infer.sock
 infer_fps: 2
 infer_workers: 3

internal/config/config.go

@@ -19,6 +19,10 @@ type Config struct {
 	EdgeToken       string   `yaml:"edge_token"`
 	StreamEnabled   bool     `yaml:"stream_enabled"`
 	RTSPURLs        []string `yaml:"rtsp_urls"`
+	// 新增：自动按需拉流配置
+	StreamPullURL  string `yaml:"stream_pull_url"`  // 云端拉流网关地址
+	StreamProtocol string `yaml:"stream_protocol"`  // 拉流协议: flv, rtsp, ws_flv
+	AutoPull       bool   `yaml:"auto_pull"`        // 是否启用自动按需拉流
 	InferSocket     string   `yaml:"infer_socket"`
 	InferFPS        int      `yaml:"infer_fps"`
 	InferWorkers    int      `yaml:"infer_workers"`

internal/stream/ingestor.go

@@ -29,15 +29,17 @@ type streamProcess struct {
 
 type StreamManager struct {
 	cfg       *config.Config
+	puller    *Puller // 可选的动态拉流客户端
 	frames    chan<- Frame
 	processes map[string]*streamProcess // url -> {cmd, fps}
 	mu        sync.Mutex
 	updates   <-chan *config.Config
 }
 
-func NewStreamManager(cfg *config.Config, frames chan<- Frame, updates <-chan *config.Config) *StreamManager {
+func NewStreamManager(cfg *config.Config, puller *Puller, frames chan<- Frame, updates <-chan *config.Config) *StreamManager {
 	return &StreamManager{
 		cfg:       cfg,
+		puller:    puller,
 		frames:    frames,
 		processes: make(map[string]*streamProcess),
 		updates:   updates,
@@ -45,7 +47,14 @@ func NewStreamManager(cfg *config.Config, frames chan<- Frame, updates <-chan *c
 }
 
 func (sm *StreamManager) Run(ctx context.Context) {
-	// Initial start
+	// 1. 动态拉流模式
+	if sm.puller != nil {
+		log.Println("stream: running in auto-pull mode")
+		sm.runAutoPullMode(ctx)
+		return
+	}
+
+	// 2. 静态配置模式
 	sm.applyStreams(ctx, sm.cfg.RTSPURLs, sm.cfg.InferFPS)
 
 	for {
@@ -60,6 +69,39 @@ func (sm *StreamManager) Run(ctx context.Context) {
 	}
 }
 
+// runAutoPullMode 动态拉流模式主循环
+func (sm *StreamManager) runAutoPullMode(ctx context.Context) {
+	for {
+		select {
+		case <-ctx.Done():
+			sm.stopAll()
+			return
+		default:
+		}
+
+		// 从云端获取拉流地址
+		url, err := sm.puller.Pull()
+		if err != nil {
+			log.Printf("stream: pull failed: %v, retry in 10s", err)
+			time.Sleep(10 * time.Second)
+			continue
+		}
+
+		log.Printf("stream: got dynamic url=%s, starting ingestion", url)
+		
+		// 启动该 URL 的拉流
+		sm.applyStreams(ctx, []string{url}, sm.cfg.InferFPS)
+
+		// 等待上下文结束或 URL 被移除（通常意味着需要重新 Pull）
+		// 在 auto-pull 模式下，如果 ffmpeg 断开，streamLoop 会自动重试，
+		// 但我们需要在这里监听 ctx，或者等待 puller 心跳失败后重新拉取。
+		// 简单起见，这里阻塞直到 ctx 取消，streamLoop 内部会处理 ffmpeg 重连。
+		// 如果 streamLoop 发现 URL 失效，会退出并删除 process。
+		<-ctx.Done()
+		sm.stopAll()
+	}
+}
+
 func (sm *StreamManager) applyStreams(ctx context.Context, urls []string, fps int) {
 	sm.mu.Lock()
 	defer sm.mu.Unlock()

internal/stream/puller.go

@@ -0,0 +1,205 @@
+package stream
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"log"
+	"net/http"
+	"time"
+
+	"tianyan-edge/internal/config"
+)
+
+// Puller 负责从云端网关动态获取拉流地址并维护心跳
+type Puller struct {
+	cfg       *config.Config
+	client    *http.Client
+	sessionID string
+	stopCh    chan struct{}
+}
+
+// PullResponse 云端网关返回结构
+type PullResponse struct {
+	Code int    `json:"code"`
+	Msg  string `json:"msg"`
+	Data struct {
+		URL       string `json:"url"`
+		Protocol  string `json:"protocol"`
+		TTL       int    `json:"ttl"`
+		DeviceID  string `json:"device_id"`
+		ChannelID string `json:"channel_id"`
+	} `json:"data"`
+}
+
+// HeartbeatPayload 心跳请求结构
+type HeartbeatPayload struct {
+	EdgeToken string `json:"edge_token"`
+}
+
+// PullPayload 拉流请求结构
+type PullPayload struct {
+	EdgeToken string `json:"edge_token"`
+	Protocol  string `json:"protocol"`
+}
+
+func NewPuller(cfg *config.Config) *Puller {
+	return &Puller{
+		cfg: cfg,
+		client: &http.Client{
+			Timeout: 60 * time.Second, // WVP SIP 信令较慢，设置较长超时
+		},
+		stopCh: make(chan struct{}),
+	}
+}
+
+// Pull 请求云端获取拉流 URL
+func (p *Puller) Pull() (string, error) {
+	if p.cfg.StreamPullURL == "" {
+		return "", fmt.Errorf("stream_pull_url not configured")
+	}
+
+	payload := PullPayload{
+		EdgeToken: p.cfg.EdgeToken,
+		Protocol:  p.cfg.StreamProtocol,
+	}
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return "", err
+	}
+
+	req, err := http.NewRequest("POST", p.cfg.StreamPullURL+"/api/v1/edge/pull", bytes.NewReader(body))
+	if err != nil {
+		return "", err
+	}
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("X-Edge-Token", p.cfg.EdgeToken)
+
+	resp, err := p.client.Do(req)
+	if err != nil {
+		return "", fmt.Errorf("pull request failed: %w", err)
+	}
+	defer resp.Body.Close()
+
+	var pullResp PullResponse
+	if err := json.NewDecoder(resp.Body).Decode(&pullResp); err != nil {
+		return "", fmt.Errorf("decode pull response failed: %w", err)
+	}
+
+	if pullResp.Code != 0 {
+		return "", fmt.Errorf("pull failed: %s", pullResp.Msg)
+	}
+
+	p.sessionID = p.cfg.EdgeToken
+	log.Printf("puller: got stream url protocol=%s ttl=%ds", pullResp.Data.Protocol, pullResp.Data.TTL)
+	return pullResp.Data.URL, nil
+}
+
+// StartHeartbeatLoop 启动后台心跳保活协程
+func (p *Puller) StartHeartbeatLoop() {
+	go func() {
+		ticker := time.NewTicker(20 * time.Second)
+		defer ticker.Stop()
+
+		for {
+			select {
+			case <-p.stopCh:
+				log.Println("puller: heartbeat loop stopped")
+				return
+			case <-ticker.C:
+				if p.sessionID == "" {
+					continue
+				}
+				if err := p.sendHeartbeat(); err != nil {
+					log.Printf("puller: heartbeat failed: %v (will retry next tick)", err)
+				}
+			}
+		}
+	}()
+}
+
+// sendHeartbeat 发送单次心跳
+func (p *Puller) sendHeartbeat() error {
+	payload := HeartbeatPayload{EdgeToken: p.cfg.EdgeToken}
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return err
+	}
+
+	req, err := http.NewRequest("POST", p.cfg.StreamPullURL+"/api/v1/edge/heartbeat", bytes.NewReader(body))
+	if err != nil {
+		return err
+	}
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("X-Edge-Token", p.cfg.EdgeToken)
+
+	resp, err := p.client.Do(req)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+
+	var respData struct {
+		Code int    `json:"code"`
+		Msg  string `json:"msg"`
+	}
+	if err := json.NewDecoder(resp.Body).Decode(&respData); err != nil {
+		return err
+	}
+
+	if respData.Code != 0 {
+		return fmt.Errorf("heartbeat failed: %s", respData.Msg)
+	}
+	return nil
+}
+
+// Release 主动释放云端拉流会话
+func (p *Puller) Release() {
+	if p.sessionID == "" || p.cfg.StreamPullURL == "" {
+		return
+	}
+
+	payload := HeartbeatPayload{EdgeToken: p.cfg.EdgeToken}
+	body, err := json.Marshal(payload)
+	if err != nil {
+		log.Printf("puller: release marshal error: %v", err)
+		return
+	}
+
+	req, err := http.NewRequest("POST", p.cfg.StreamPullURL+"/api/v1/edge/release", bytes.NewReader(body))
+	if err != nil {
+		log.Printf("puller: release request error: %v", err)
+		return
+	}
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("X-Edge-Token", p.cfg.EdgeToken)
+
+	resp, err := p.client.Do(req)
+	if err != nil {
+		log.Printf("puller: release do error: %v", err)
+		return
+	}
+	defer resp.Body.Close()
+
+	var respData struct {
+		Code int    `json:"code"`
+		Msg  string `json:"msg"`
+	}
+	if err := json.NewDecoder(resp.Body).Decode(&respData); err != nil {
+		log.Printf("puller: release decode error: %v", err)
+		return
+	}
+
+	if respData.Code == 0 {
+		log.Println("puller: session released successfully")
+	} else {
+		log.Printf("puller: release failed: %s", respData.Msg)
+	}
+	p.sessionID = ""
+}
+
+// Stop 停止拉流管理器
+func (p *Puller) Stop() {
+	close(p.stopCh)
+	p.Release()
+}