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Re: Re: I have trying out the No Cache and Expires but no work

by tachyon (Chancellor)
on Jun 07, 2001 at 16:10 UTC ( #86520=note: print w/replies, xml ) Need Help??


in reply to Re: I have trying out the No Cache and Expires but no work
in thread I have trying out the No Cache and Expires but no work

Good post. The expires header requires a valid date if you output it yourself ie:

Expires: Fri, 30 Oct 1998 14:19:41 GMT

With CGI.pm however, a variety of options (including -'1d')are allowed when you pass values to it, presumably these are converted into a time in GMT - I have never bothered to check. If you send invalid date values in an HTTP expires header (ie 'now' or '0') it is interpreted as being in the past so has the desired effect anyway.

tachyon

  • Comment on Re: Re: I have trying out the No Cache and Expires but no work

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[atcroft]: james28909: What about October 5, 1582?
[stevieb]: atcroft: "Make both hands into fists..."... is something my Ma taught me in our native lang, but I was to ignorant and young to pay attention. Thanks for that :)
[atcroft]: stevieb: Sad to say that I only recently learned that particular trick, but I have since found it very useful.... :)
[james28909]: ill be back with a solution eventually
[stevieb]: it's a reminder to re-inforce it :P
[atcroft]: james28909: That particular questions was a bit of trick, actually (depending on the country you are in). More interesting is, if you are trying to subtract from an epoch time, for instance, you might have to consider when/if DST occurs for a location,
[atcroft]: because you may have to adjust the number of seconds you change from an epoch from 86400 (not to mention leap seconds)....

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