Modify middleware response

Question

My requirement: write a middleware that filters all \"bad words\" out of a response that comes from another subsequent middleware (e.g. Mvc).

The problem: streaming

Answer 1

A "real" production scenario may be found here: tethys logging middeware

If you follow the logic presented in the link, do not forget to addhttpContext.Request.EnableRewind() prior calling _next(httpContext) (extension method of Microsoft.AspNetCore.Http.Internal namespace).