Even if you are using IIS or apache, in my guess you are using static html page as a landing page, and by default the web server doesn’t allow POST or GET verb on .html page, facebook calls your page via POST/GET verb the solution would be to rename the page into .php or .aspx and you should be … Read more
You are running into CORS issues. There are several ways to fix/workaround this. Turn off CORS. For example: how to turn off cors in chrome Use a plugin for your browser Use a proxy such as nginx. example of how to set up Go through the necessary setup for your server. This is more a factor of … Read more
This is the default response of the default implementation of HttpServlet#doXxx() method (doGet(), doPost(), doHead(), doPut(), etc). This means that when the doXxx() method is not properly being @Overriden in your servlet class, or when it is explicitly being called via super, then you will face a HTTP 405 “Method not allowed” error. So, you … Read more