add B3 propagation

[basvanbeek]

OpenCensus specs dictates for each OpenCensus library to support B3 propagation.

See: https://github.com/census-instrumentation/opencensus-specs/blob/master/trace/HTTP.md#propagation

[jcchavezs]

I can work on this. Should we support both classic and single header B3 right?

man. 29. okt. 2018 kl. 17:43 skrev Bas van Beek [email protected]:

OpenCensus specs dictates for each OpenCensus library to support B3 propagation.

See: https://github.com/census-instrumentation/opencensus-specs/blob/master/trace/HTTP.md#propagation

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[basvanbeek]

yes with classic header having priority as the other OpenCensus libraries only support classic multi header at this point and when not explicitly called out, multi header is standard B3.

[spetrashov]

Hello, @jcchavezs! Did you have a chance to work on this feature? I'm also interested in it and could offer some help.