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[new feature] Support for using a custom header in request routing #16

Open foxish opened 1 year ago

foxish commented 1 year ago

New feature or functionality What would you like Signadot to do?

While OTel headers (baggage and tracestate) are the standardized method of propagating request metadata, there are some cases where a different header is already propagated through the application. While these applications are modified over time to use the OTel headers, the ability to route using a custom header can be useful in the interim period.

Additional considerations Anything in particular to think about regarding this new feature?