Logoutproblem mit Session-Variablen

[Fred Furunkelstein 2012]

HTTP/1.1 clients and caches MUST treat other invalid date formats, especially including the value "0", as in the past (i.e., "already expired").

Nun, das Beispiel ist auch für veraltete HTTP 1.0 - Clients gedacht. Anders als bei HTTP 1.1 wird in der Spezifikation für HTTP 1.0 dieses Verhalten nur wärmstens empfohlen:

Note: Applications are encouraged to be tolerant of bad or misinformed implementations of the Expires header. A value of zero (0) or an invalid date format should be considered equivalent to an "expires immediately." Although these values are not legitimate for HTTP/1.0, a robust implementation is always desirable.