Don't use err status code if it's an invalid code

node_modules/vfs-http-adapter/restful.js

@@ -17,7 +17,7 @@ module.exports = function setup(mount, vfs, mountOptions) {
         }
             
         if (code) res.statusCode = code;
-        else if (typeof err.code == "number") res.statusCode = err.code;
+        else if (typeof err.code == "number" && isValidStatusCode(err.code)) res.statusCode = err.code;
         else if (err.code === "EBADREQUEST") res.statusCode = 400;
         else if (err.code === "EACCES") res.statusCode = 403;
         else if (err.code === "ENOENT") res.statusCode = 404;
@@ -29,6 +29,10 @@ module.exports = function setup(mount, vfs, mountOptions) {
         res.setHeader("Content-Length", Buffer.byteLength(message));
         res.end(message);
     };
+    
+    function isValidStatusCode(statusCode) {
+        return statusCode >= 100 && statusCode <= 999;
+    }
 
     // Returns a json stream that wraps input object stream
     function jsonEncoder(input, path) {