feature request(express): option to ignore `express.static` files

[dyladan]

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Discussed in https://github.com/open-telemetry/opentelemetry-js/discussions/2798

^{Originally posted by thpoiani February 19, 2022} 🙇 Thank you for this project and support. I have a question: How to ignore static files using http and express instrumentation?

app.use(express.static('public'))
```</div>

This user asked this in a discussion initially, but it is really a feature request.

[github-actions[bot]]

This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 14 days.

[dyladan]

This could be solved 2 different ways:

• a general way to ignore requests in the http instrumentation (maybe this is already possible I can't remember
• a specific feature in the express instrumentation

I don't think this is stale

[github-actions[bot]]

This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 14 days.

[dyladan]

This is not stale.

[github-actions[bot]]

This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 14 days.

[vmarchaud]

You should be able to add a configuration to ignore path starting with /public :

new HttpInstrumentation({
   ignoreIncomingRequestHook: request => {
        return request.url.startWith("/public")
   },
})