Proxy fails to invalidate old cookies when environment is reset

[sthaha]

Steps:

• log into https://jenkins.openshift.io
• reset enviroment
• access https://jenkins.openshift.io again

Expected:

• should ask user to relogin and then set a new jsessionid

Actual:

• Gets too many redirects.

This happens because the internal cache does not reflect the fact that jenkins was reset and the old jessionid won't work anymore.

[kishansagathiya]

If we consider only reset environment case, we can fix this by clearing cache on reset env. On not finding cookie in cache, proxy would expire the cookie and ask for relogin.

But a more generic solution could be

• On finding a session cookie, put a check for whether the user is logged in into jenkins. Send a GET request to jenkins with the session cookie, if response is Unauthorized expire the cookie.

@sthaha @chmouel

[kishansagathiya]

Same situation cannot happen with jenkinsIdled cookie as we check status of Jenkins pod even if we have the cookie