[hono-dev] Property bag at the end of topics for MQTT adapter?

["Pellmann Marc (INST/ECS4)" <Marc.Pellmann@xxxxxxxxxxxx>]

Hi,

to be able to support setting of specific content types (and other properties in the future) over the MQTT adapter I suggest to support properties in URL format at the end of the topics. Microsoft uses the same on Azure - https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-mqtt-support.

Topic would be something like 

telemetry/DEFAULT_TENANT/4711/?$content-type=application%2Fjson%3B%20charset%3Dutf-8

If you also support this functional addition, I can provide a pull request.

Mit freundlichen Grüßen / Best regards
Marc Pellmann

Bosch Software Innovations GmbH
Core Products Development (INST/ECS4)
Schöneberger Ufer 89-91 
10785 Berlin, Germany
www.bosch-si.de

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