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Question about message publishing with QoS1 #19

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Andy320 opened this issue Feb 8, 2018 · 2 comments
Closed

Question about message publishing with QoS1 #19

Andy320 opened this issue Feb 8, 2018 · 2 comments

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@Andy320
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Andy320 commented Feb 8, 2018

hmq/broker/client.go

Line 200 in 4750091

case QosAtLeastOnce:

@chowyu08 @MarcMagnin
I am not sure which step should be at first , puback or publish to subscriber? thanks

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@chowyu08
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chowyu08 commented Feb 8, 2018 •
edited

MQTT Protocol
The receiver is not required to complete delivery of the Application Message before sending the PUBACK. When its original sender receives the PUBACK packet, ownership of the Application Message is transferred to the receiver.

@Andy320
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Andy320 commented Feb 9, 2018

yes, the key point is the ownership

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@chowyu08 @Andy320