[JS2-930] Expires header set to 0 does not cause round-trip in IE

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Cannot Reproduce
• Fix Version/s: 2.2.1
• Component/s: Components Core
• Assignee: Dennis Dam
• Reporter: Dennis Dam
• Created: 18/Feb/09 09:43
• Updated: 04/Oct/11 21:04
• Resolved: 18/Feb/10 15:06

Description

As reported by Remco Nabuurs. Jetspeed sets the following HTTP response headers by default:

Cache-Control: no-store, no-cache, private
Pragma: no-cache
Expires: 0

To force a round trip in IE when pressing the BACK button, the expires header needs to be set to -1. Firefox and Safari assign a higher priority to the expires header and perform a round trip. When an application makes use of Ajax calls in-between requests, and an application architecture is adhered (the Ajax calls change server state), this leads to pages with out-of-sync data.