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Description
Added opt-in support to return trace response headers from Django.
This allows users to configure their Django apps to inject trace context
as headers in HTTP responses. This is useful when client side apps need
to connect their spans with the server side spans e.g, in RUM products.
Today the most practical way to do this is to use the
Server-Timing
header but in near future we might use the
traceresponse
header asdescribed here: https://w3c.github.io/trace-context/#trace-context-http-response-headers-format
As a result the implementation does not use a hard-coded header and
instead let's the users pick one.
This can be done by setting the
OTEL_PYTHON_TRACE_RESPONSE_HEADER
tothe header name that users want to inject in HTTP responses. The option
does not have a default value and the feature is disbaled when a env var
is not set.
Type of change
Please delete options that are not relevant.
How Has This Been Tested?
Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration
Does This PR Require a Contrib Repo Change?
Checklist:
See contributing.md for styleguide, changelog guidelines, and more.