Refresh module
Most of you are familiar with the feature of all web-browsers that when you press the F5 button, the content of a page is refreshed. After the F5 button is pressed, the browser repeats the previous request to the page. Nothing wrong will actually happen when the previous request is made by the GET method. However, problems appear when the last request is made by the POST method. Let's consider an example where a user is transferring money to a shop to pay for some goods. Having completed this operation, the user refreshes the page and as a result the server code is executed once again with the same data. Thus, the user may accidentally pay twice.
Valery Minsk propose to use an HTTP module to intercept the refresh.