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[Webpush] Prefer: wait=0 for Receiving Push Message Receipts

Brian Raymor <Brian.Raymor@microsoft.com> Thu, 09 June 2016 22:20 UTC

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From: Brian Raymor <Brian.Raymor@microsoft.com>
To: "webpush@ietf.org" <webpush@ietf.org>
Thread-Topic: Prefer: wait=0 for Receiving Push Message Receipts
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Subject: [Webpush] Prefer: wait=0 for Receiving Push Message Receipts
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https://github.com/webpush-wg/webpush-protocol/issues/113

Idel has suggested the addition of the Prefer: wait=0 option to section 6.3. Receiving Push Message Receipts to allow application servers
to have the same option for immediately checking/receiving receipts as user agents have for immediately checking/receiving messages.

I'd appreciate broader review and comments about whether this is a useful feature.
 
The addition to 6.3. Receiving Push Message Receipts would be:


An application server can also request the contents of the receipt subscription resource immediately by including a Prefer header field [RFC7240]
with a "wait" preference set to "0". In response to this request, the push service MUST generate a server push for all receipts that have not yet been delivered.

A 204 (No Content) status code with no associated server pushes indicates that no new receipts are presently available.

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