Sentry Instrumentation for Dart's io HttpClient

[silverhairs]

Problem Statement

Out of the box, when performing http request in things such as the NetworkImage widget or the CachedNetworkImagePackage flutter uses dart's io HttpClient class. Currently Sentry does not have a package to instrument that. It's easy to override the underlying HttpClient with a custom implementation by extending HttpOverrides and overriding the createHttpClient method; but there is no implementation of HttpClient with sentry, and we cannot pass dio and http.Client as none of them implement HttpClient.

I think it would be important for sentry to support the native classes before going into the 3rd party libraries, this will reduce dependency on external libraries, and developers will not be obliged to always depend on a 3rd parties if I just want to instrument all network requests.

Solution Brainstorm

Extend HttpClient and HttpOverrides and make it easier for developers to perform instrumentations.

I could investigate this and submit a PR but I cannot really promise anything for now as I have little availability.

Are you willing to submit a PR?

None

[marandaneto]

Dupe #539