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Re: [hono-dev] Property bag at the end of topics for MQTT adapter?
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On Tue, 2017-02-14 at 06:51 +0000, Pellmann Marc (INST/ECS4) wrote:
> Hi Kai,
>
> > We should probably declare a delimiter between the endpoint address and the
> > message properties. Similar
> > to e.g. how it is done in URIs ...
> > Since we are in control of the endpoint addresses we can make sure that the
> > delimiter is not a part of the
> > address. In this case we could define "?" as the delimiter. Is there also a
> > delimiter for the properties themselves?
> > In URIs the "&" character is used for that purpose. Does the "$" have a
> > particular meaning in your example?
>
> This is exactly what I had in mind (and also what Azure uses). The typical URI
> scheme with ? and &. You can see the ? in my example:
>
> telemetry/DEFAULT_TENANT/4711/?$content-
> type=application%2Fjson%3B%20charset%3Dutf-8
>
> At the moment I only use the content-type parameter. If we would have more
> parameters they would be separated by &. (The $ is the proposed prefix-
> character by Microsoft for system properties in separation to application
> properties).
>
It seems we are in agreement regarding the delimiters :-) Do we still think that
we need to URL encode the properties then?
> Mit freundlichen Grüßen / Best regards
> Marc Pellmann
>
> Bosch Software Innovations GmbH
> Core Products Development (INST/ECS4)
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> www.bosch-si.de
>
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