Expose `spanToTraceparentHeader`

[camjackson]

Problem Statement

I have a need to manually apply the traceparent header to my application's outgoing network requests, and I want to use the traceId and spanId from the active sentry span. There is already a spanToTraceHeader() function exported by the library but it returns a sentry trace header, not a W3C standard traceparent header.

However, there is already a spanToTraceparentHeader() function right alongside it! But it's not exported from the library/ies. It would be great if this was exported so I don't have to generate the header mysekf.

Solution Brainstorm

Export the spanToTraceparentHeader() function alongside the spanToTraceHeader() function 🙂

Additional Context

_{Tip: React with 👍 to help prioritize this improvement. Please use comments to provide useful context, avoiding +1 or me too, to help us triage it.}

[linear]

JS-1039

[Lms24]

Hey @camjackson thanks for writing in!

Can you let me know which specific SDK you're using?

In general, you should be able to do any of this since version 10.10.0:

• In any of our browser SDKs, you can set propagateTraceParent: true which will add the W3C traceparent header to outgoing requests
• Use Sentry.getTraceData({propagateTraceparent: true}) to get a fully serialized W3C trace parent header value
• Use getActiveSpan().spanContext() to get the raw trace id, span id and sampling flags to manually construct the header.

Does this work for you?

[Lms24]

I'm going to close this because I believe you can do this today with existing APIs. Please feel free to tag me if we're still missing an important piece. Happy to reopen in this case. Thanks!