Add recordings API endpoints

cmd/sdrd/main.go

@@ -485,6 +485,46 @@ func main() {
 		_ = json.NewEncoder(w).Encode(evs)
 	})
 
+	http.HandleFunc("/api/recordings", func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodGet {
+			http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		snap := cfgManager.Snapshot()
+		list, err := recorder.ListRecordings(snap.Recorder.OutputDir)
+		if err != nil {
+			http.Error(w, "failed to list recordings", http.StatusInternalServerError)
+			return
+		}
+		_ = json.NewEncoder(w).Encode(list)
+	})
+
+	http.HandleFunc("/api/recordings/", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		id := strings.TrimPrefix(r.URL.Path, "/api/recordings/")
+		if id == "" {
+			http.Error(w, "missing id", http.StatusBadRequest)
+			return
+		}
+		snap := cfgManager.Snapshot()
+		base := filepath.Clean(filepath.Join(snap.Recorder.OutputDir, id))
+		if !strings.HasPrefix(base, filepath.Clean(snap.Recorder.OutputDir)) {
+			http.Error(w, "invalid path", http.StatusBadRequest)
+			return
+		}
+		if r.URL.Path == "/api/recordings/"+id+"/audio" {
+			http.ServeFile(w, r, filepath.Join(base, "audio.wav"))
+			return
+		}
+		if r.URL.Path == "/api/recordings/"+id+"/iq" {
+			http.ServeFile(w, r, filepath.Join(base, "signal.cf32"))
+			return
+		}
+		// default: meta.json
+		http.ServeFile(w, r, filepath.Join(base, "meta.json"))
+	})
+
 	http.Handle("/", http.FileServer(http.Dir(cfg.WebRoot)))
 
 	server := &http.Server{Addr: cfg.WebAddr}

internal/recorder/list.go

@@ -0,0 +1,45 @@
+package recorder
+
+import (
+	"encoding/json"
+	"os"
+	"path/filepath"
+	"sort"
+	"time"
+)
+
+type Recording struct {
+	ID       string    `json:"id"`
+	Start    time.Time `json:"start"`
+	CenterHz float64   `json:"center_hz"`
+	Path     string    `json:"path"`
+}
+
+func ListRecordings(root string) ([]Recording, error) {
+	entries, err := os.ReadDir(root)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil, nil
+		}
+		return nil, err
+	}
+	var out []Recording
+	for _, e := range entries {
+		if !e.IsDir() {
+			continue
+		}
+		id := e.Name()
+		metaPath := filepath.Join(root, id, "meta.json")
+		b, err := os.ReadFile(metaPath)
+		if err != nil {
+			continue
+		}
+		var m Meta
+		if err := json.Unmarshal(b, &m); err != nil {
+			continue
+		}
+		out = append(out, Recording{ID: id, Start: m.Start, CenterHz: m.CenterHz, Path: filepath.Join(root, id)})
+	}
+	sort.Slice(out, func(i, j int) bool { return out[i].Start.After(out[j].Start) })
+	return out, nil
+}