weareoutman opened a new issue, #12367: URL: https://github.com/apache/skywalking/issues/12367
### Search before asking - [X] I had searched in the [issues](https://github.com/apache/skywalking/issues?q=is%3Aissue) and found no similar issues. ### Apache SkyWalking Component NodeJS Client Side Agent (apache/skywalking-client-js) ### What happened Relevant code: https://github.com/apache/skywalking-client-js/blob/e36b33bb415b7cef6a280d0e4579f9f3327b7d0b/src/trace/interceptors/fetch.ts#L82-L91 <img width="368" alt="image" src="https://github.com/apache/skywalking/assets/2338946/9e6b4596-c107-48f7-a019-c0a828e48a5b";> If we call fetch with a Request object which contains headers, these headers will be dropped if enable skywalking-client-js. ### What you expected to happen Keep user defined headers. ### How to reproduce https://codesandbox.io/p/sandbox/skywalking-headers-bug-repro-ss74fd Open the devtools, switch to network tab, filter Fetch/XHR, open details for the request `/api/projects`, in Request Headers, user defined header `My-Custom-Header` is missing. While change the value of `enableClientMonitor` to `false` in `monitor.mjs`, the header `My-Custom-Header` exists as expected. ### Anything else _No response_ ### Are you willing to submit a pull request to fix on your own? - [ ] Yes I am willing to submit a pull request on my own! ### Code of Conduct - [X] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct) -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: notifications-unsubscr...@skywalking.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
