HTTP imports not found error

[guybedford]

What is the problem this feature will solve?

When a 404 not found response is made for an HTTP/s import, the error thrown is currently:

Error [ERR_NETWORK_IMPORT_BAD_RESPONSE]: import 'https://h3manth.com/foo' received a bad response: HTTP response returned status code of 404

it might be useful to convert this into a full ERR_MODULE_NOT_FOUND error to properly match semantics in error handling code paths.

What is the feature you are proposing to solve the problem?

Return an ERR_MODULE_NOT_FOUND for 404 network errors in HTTP/s imports.

What alternatives have you considered?

Keeping it as a custom error or network not found error creates divergence between local and remote resolvers. It can be useful to streamline the error path handling by having a singular code to check.

[guybedford]

/cc @JakobJingleheimer would be interested to get your thoughts on this one.

[JakobJingleheimer]

That sounds appropriate to me! Should we also handle other 4XX response statuses like 401 & 403? I took a quick look through existing error codes, and I didn't see anything appropriate for those two (so perhaps a new ERR_NETWORK_AUTH_FAILURE or following fs access failures, ERR_NETWORK_EACCESS?).

[benjamingr]

That whole function can be simplified significantly by avoiding new Promise I believe

[benjamingr]

Should I maybe add the 404 error handling to #41950 ?

[guybedford]

Would be great to see actually.

[benjamingr]

There is a second question here of "whether 404s should be cached or should a second import attempt attempt to make the request again" - but I won't change it in that PR

[benjamingr]

Done + added "fixes" #41950

[benjamingr]

Would be great to get some reviews on that PR from people interested in the feature request :)

[github-actions]

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