Ricibald Ricibald - 25 days ago 17
Javascript Question

How do I reload a page without a POSTDATA warning in Javascript?

I want to reload a page using:

window.location.reload(true);


But I receive the POSTDATA warning because the refresh function want to resend previous POST form data. How can I refresh my page without this warning?

UPDATED: I have no control of the project! I can't workaround the POST itself!

Answer

Just changing window.location in JavaScript is dangerous because the user could still hit the back button and resubmit the post, which could have unexpected results (such as a duplicate purchase). PRG is a much better solution

Use the Post/Redirect/Get (PRG) pattern

To avoid this problem, many web applications use the PRG pattern — instead of returning an HTML page directly, the POST operation returns a redirection command (using the HTTP 303 response code (sometimes 302) together with the HTTP "Location" response header), instructing the browser to load a different page using an HTTP GET request. The result page can then safely be bookmarked or reloaded without unexpected side effects.

Comments