feat: v2 (#599)

Read https://github.com/filebrowser/filebrowser/pull/575.

Former-commit-id: 7aedcaaf72b863033e3f089d6df308d41a3fd00c [formerly bdbe4d49161b901c4adf9c245895a1be2d62e4a7] [formerly acfc1ec67c423e0b3e065a8c1f8897c5249af65b [formerly d309066def]]
Former-commit-id: 0c7d925a38a68ccabdf2c4bbd8c302ee89b93509 [formerly a6173925a1382955d93b334ded93f70d6dddd694]
Former-commit-id: e032e0804dd051df86f42962de2b39caec5318b7

http/utils.go

@@ -0,0 +1,39 @@
+package http
+
+import (
+	"encoding/json"
+	"net/http"
+	"os"
+
+	"github.com/filebrowser/filebrowser/v2/errors"
+)
+
+func renderJSON(w http.ResponseWriter, r *http.Request, data interface{}) (int, error) {
+	marsh, err := json.Marshal(data)
+
+	if err != nil {
+		return http.StatusInternalServerError, err
+	}
+
+	w.Header().Set("Content-Type", "application/json; charset=utf-8")
+	if _, err := w.Write(marsh); err != nil {
+		return http.StatusInternalServerError, err
+	}
+
+	return 0, nil
+}
+
+func errToStatus(err error) int {
+	switch {
+	case err == nil:
+		return http.StatusOK
+	case os.IsPermission(err):
+		return http.StatusForbidden
+	case os.IsNotExist(err), err == errors.ErrNotExist:
+		return http.StatusNotFound
+	case os.IsExist(err), err == errors.ErrExist:
+		return http.StatusConflict
+	default:
+		return http.StatusInternalServerError
+	}
+}