Request header field Access-Control-Allow-Headers is not allowed by Access-Control-Allow-Headers

Question

I\'m trying to send files to my server with a post request, but when it sends it causes the error:

Request header field Content-Type is not allowed by

Answer 1

In Asp Net Core, to quickly get it working for development; in Startup.cs, Configure method add

app.UseCors(options => options.AllowAnyOrigin().AllowAnyMethod().AllowAnyHeader());