It does the same thing as the Go version. The Go version requires you to pass into the context the data to be sent back to the client, while the Rust version uses the return value of the function as the data to be sent back. The framework then serializes that appropriately.
The only issue there is if you want to return the error with code 200 (which you shouldn't, but it's been known to happen). In that case the Go code and the Rust code will look a bit closer to each other because then you can't use `?` this way (without writing some more boilerplate elsewhere).
The only issue there is if you want to return the error with code 200 (which you shouldn't, but it's been known to happen). In that case the Go code and the Rust code will look a bit closer to each other because then you can't use `?` this way (without writing some more boilerplate elsewhere).