How to return FileInfo in AspNet Core MVC

Question

I am trying to get FileInfo result from a controller but it returns always 500 . Files exists and no error found. All middleware's and controller works fine but I don't know why i get however 500 status code. what i Have tried is given below.

1.

public ActionResult GetFileinfo(string filePath) {
   FileInfo fileInfo = new FileInfo("C:\\Mw_Prog\\Ema.txt") ;
   if(fileInfo.Exists)
     return Ok(fileInfo) ;
   else
     return StatusCode(404,"NOT FOUND");
 }

public FileInfo GetFileinfo(string filePath) {
  FileInfo fileInfo = new FileInfo("C:\\Mw_Prog\\Ema.txt") ;
  if(fileInfo.Exists)
    return fileInfo ;
  else
    return null;
}

After I Checked some backgroung functionality and found Exception in RecourseInvoker.cs class.

System.Text.Json.JsonException: "A possible object cycle was detected. This can either be due to a cycle or if the object depth is larger than the maximum allowed depth of 32. Consider using ReferenceHandler.Preserve on JsonSerializerOptions to support cycles. Path: $.Directory.Parent.Parent.Parent.Parent.Parent.Parent.Parent.Root.Root.Root.Root.Root.Root.Root.Root.Root.Root.Root.Root.Root.Root.Root.Root.Root.Root.Root.Root.Root.Root.Root.Name."

Anyone Know what that means ?

Answer 1

Did you try sending Ok() alone? Perhaps the response body (sending FileInfo) is larger than the configured limit

PD: Not reputation for adding a comment instead of answer