Move cmd module to internal

internal/debug/stack.go

@@ -0,0 +1,57 @@
+package debug
+
+import (
+	"bytes"
+	"fmt"
+	"net/http"
+	"runtime"
+)
+
+var stackSkip = [][]byte{
+	// main.go
+	[]byte("main.main()"),
+	[]byte("created by os/signal.Notify"),
+
+	// api/stack.go
+	[]byte("github.com/AlexxIT/go2rtc/internal/api.stackHandler"),
+
+	// api/api.go
+	[]byte("created by github.com/AlexxIT/go2rtc/internal/api.Init"),
+	[]byte("created by net/http.(*connReader).startBackgroundRead"),
+	[]byte("created by net/http.(*Server).Serve"), // TODO: why two?
+
+	[]byte("created by github.com/AlexxIT/go2rtc/internal/rtsp.Init"),
+	[]byte("created by github.com/AlexxIT/go2rtc/internal/srtp.Init"),
+
+	// webrtc/api.go
+	[]byte("created by github.com/pion/ice/v2.NewTCPMuxDefault"),
+	[]byte("created by github.com/pion/ice/v2.NewUDPMuxDefault"),
+}
+
+func stackHandler(w http.ResponseWriter, r *http.Request) {
+	sep := []byte("\n\n")
+	buf := make([]byte, 65535)
+	i := 0
+	n := runtime.Stack(buf, true)
+	skipped := 0
+	for _, item := range bytes.Split(buf[:n], sep) {
+		for _, skip := range stackSkip {
+			if bytes.Contains(item, skip) {
+				item = nil
+				skipped++
+				break
+			}
+		}
+		if item != nil {
+			i += copy(buf[i:], item)
+			i += copy(buf[i:], sep)
+		}
+	}
+	i += copy(buf[i:], fmt.Sprintf(
+		"Total: %d, Skipped: %d", runtime.NumGoroutine(), skipped),
+	)
+
+	if _, err := w.Write(buf[:i]); err != nil {
+		panic(err)
+	}
+}