Forum Discussion

InnO's avatar
InnO
Icon for Nimbostratus rankNimbostratus
Sep 16, 2014

Question about If-Modified-Since HTTP header

Hi all, I am running in something I cannot explain at this time, so any help would be greatly appreciated. Seems I do not understand the HTTP headers If-Modified-Since and If-None-Match 🙂 I ini...
application delivery
devops
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Kevin_Stewart's avatar
Kevin_Stewart
Icon for Employee rankEmployee
Sep 17, 2014

The If-Modified-Since and If-None-Match headers are used for cache control. Did you want to do something particular with these two headers?

So if you do this, what do you see?

when HTTP_REQUEST {
    if { [HTTP::header exists If-Modified-Since] } {
        log local0. "If-Modified-Since exists: [HTTP::header If-Modified-Since]"
    }
    if { [HTTP::header exists If-None-Match] } {
        log local0. "If-None-Match exists: [HTTP::header If-None-Match]"
    }
}