Our client's customers ran into errors as the web service that we use started complaining of certificate error. So we decided to do daily updates to cacert.pem. However, the client doesn't want to wait up to possibly 24 hours. Thanks.

Sent from my iPhone

> On Jul 2, 2016, at 5:03 PM, Tim Rühsen <tim.ruehsen_at_gmx.de> wrote:
>
>> On Saturday 02 July 2016 08:37:18 Vinayak Tanksale wrote:
>> How do we know that we need to download a new one? We have an app that uses
>> cacert.pem and if a new one is issued then the app stops functioning. We
>> would ideally want as much less downtime as possible. We are downloading
>> the file once a day via a script but if there was a way to know when a new
>> cacert had been posted then we can download it right away without waiting
>> for our script to run. Thank you very much.
>
> (Bash me for suggesting to use wget ;-))
>
> $ wget -N http-url
>
> only downloads the file if the timestamp changed.
> So there is not much data traffic in the case when the server hasn't a new
> one.
>
> I would run this every X minutes and compare the file date before and after
> 'wget ...'. If it changed, you know there has been new data arrived.
>
> But maybe there is a similar curl option that I am not aware off.
>
> *duck away*
>
> Tim

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Received on 2016-07-02