What is difference between HTTP Redirect and Forward

Control is forwarded to the resource available within the server from where the call is made, the transfer of control is made internally by the container, where client is completely unaware that a forward is happening.

When forward is done, the original request and response objects are transferred along with the additional parameters if needed.

Forward can’t transfer control to some other domain.

Original URL at the client side remains intact, refreshing the page will cause the whole step to repeat again.

Session object is not lost in forward or redirect.

A redirect is a two step process where web application instructs the browser client to fetch the fetch the second URL which differs from the original.

Server sends Http Status Code of 301 to the client, and then client follows the instructions.

If someone reloads the page on browser, then original request will not be repeated. Just the second url will be fetched again.

Redirect is marginally slower than forward, since it requires two requests.

Objects placed in request scope are not available to second request.

There are several ways to perform a redirect for example

Http/1.1 301 moved permanently
Location : http://www.foobar.org/
<meta http-equiv="refresh" Content="0; URL=http://www.example.org/"/>
<script type="text/javascript"> location.href ="http://www.foobar.org" </script>

If you need to transfer of control to a different domain.

To achieve separation of tasks.