As I said in the article, the example is simplified. As you point out, incorporating the HTTP code into the error and using errors.As is much better way of doin

As I said in the article, the example is simplified. As you point out, incorporating the HTTP code into the error and using errors.As is much better way of doing that: "Obviously, the common HTTP status codes could easily be a new error type (based on int type) so the actual code could be easily extracted via errors.As, but I want to keep the example simple."