Add custom CORS headers to AppSync OPTIONS preflight request?
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I use Sentry and AppSync with lambda resolvers. I figured out how to get sentry distributed tracing hooked up but it requires the sentry-trace-id and baggage headers.
The sentry headers aren't being sent because AppSync sets Access-Control-Request-Headers to a restrictive list of allowed headers in the pre-flight OPTIONS response.
It would be great if there was a way to add more allowed headers for AppSync CORS requests so that I can enable distributed tracing of requests from the frontend to my AppSync resolver lambda functions.