HTTP Attributes are not mapped in Stackdriver exporter

[Sebruck]

Please answer these questions before submitting a bug report.

What version of OpenCensus are you using?

0.12.3

What JVM are you using (java -version)?

8

What did you do?

Adding http attributes according to the spec to a span (http.host, http.method, ...), see here: https://github.com/Sebruck/opencensus-scala/blob/master/akka-http/src/main/scala/com/github/sebruck/opencensus/akka/http/trace/HttpAttributes.scala#L16

What did you expect to see?

The spec defines that those attributes should be mapped when exporting to stackdriver, e.g.:
http.host -> /http/host

But this seems not to happen, in Stackdriver I still see the initial value.

I also can't find any code doing this in the opencensus-exporter-trace-stackdriver module.

What did you see instead?

The attributes should be mapped as defined in the specs.

Is this a missing feature or a bug?

[Sebruck]

If it's a missing feature I'd be happy to contribute.

[sebright]

I think this is a missing feature, and we would be happy to accept a contribution!