added disk quota

pkg/srv/srv.go

@@ -7,7 +7,9 @@ import (
 	"io"
 	stdfs "io/fs"
 	"net/http"
+	"os"
 	"path"
+	"runtime"
 	"strings"
 
 	"cachefs/pkg/fs"
@@ -15,6 +17,21 @@ import (
 	"github.com/go-logr/logr"
 )
 
+func PrintStack() {
+	os.Stderr.Write(Stack())
+}
+
+func Stack() []byte {
+	buf := make([]byte, 1024)
+	for {
+		n := runtime.Stack(buf, true)
+		if n < len(buf) {
+			return buf[:n]
+		}
+		buf = make([]byte, 2*len(buf))
+	}
+}
+
 type FileServer struct {
 	log logr.Logger
 	fs  *fs.FS
@@ -51,13 +68,17 @@ func (fs *FileServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		r.URL.Path = upath
 	}
 	p := path.Clean(upath)
+	option := r.FormValue("o")
+	if option == "debug" {
+		PrintStack()
+	}
 	d, _, err := fs.fs.StatWithOffline(p)
 	if err != nil {
 		msg, code := toHTTPError(err)
 		http.Error(w, msg, code)
 		return
 	}
-	option := r.FormValue("o")
+	//option := r.FormValue("o")
 	if option == "v" {
 		err = video.Execute(w, r.URL.Path)
 		if err != nil {