Add a cookie based ITempDataProvider

[DamianEdwards]

Using TempData today requires the manual configuration of session state. It would be great to have a provider available that uses cookies (protected with Data Protection) to round-trip the temp data information so that session state isn't required.

While we likely can't change this to be the default (:cry:) it would be awesome to have it be available.

Temp data is a great solution for showing form success messages after a Post-Redirect-Get cycle and the need to use session state for that today is overkill.

@rynowak @sebastienros @danroth27

[brockallen]

Here's one for MVC 5: https://github.com/brockallen/CookieTempData

[javiercn]

+1! (No reactions on mobile)

[rynowak]

/cc @blowdart any concerns with this?

[blowdart]

Ewww. Session in cookies? Remember there's a max size on cookies from a site.

As long as it's ran through data protection, which will increase the size, and the cookies are limited to the app path, and they're HTTP Only and, if you're on HTTPS they're marked secure, then fine.