Why do I get “Error parsing HTTP request header” when POSTing a JSON string?

Question

I am trying to send a POST request from browser to my server(local host). My request URL is :

 http://localhost:8080/myPath/myServlet?requestData={          


        

Answer 1

In my case problem was caused by security issues, i used csfr for authentication, and all my post forms should have input with _csrf