Eduardo Martins wrote:
> Hi, i'm developing a SIMPLE service and how should I handle the SIP
> SUBSCRIBE request with an Expires header of 0? Should I handle it
> like:
>
> Option 1) A new subscription with a 0 sec duration if no such
> subscription exists or a subscription refresh with a 0 sec duration if
> such subscription exists. This way it will always returns 1 Response
> and 2 NOTIFY Requests.
>
> Option 2) A special Fetch operation if no such subscription exists or
> a Subscription Removal if such subscription exists. This way it will
> only return 1 Response and 1 Notify (with SS Header 's status as
> "terminated").
Whether there is an existing subscription or not, this subscribe should
result in a 200 response as well as an immediate single NOTIFY
indicating that the subscription has been terminated. While this may be
used as a "fetch" operation, its behavior isn't special.
Paul
> Thanks in advance for your help. Best regards,
>
> Eduardo Martins
> PT Inovação
>
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