During request processing, the request Body will be read into a buffer, as shown below:

	case ct == "application/json":
		if r.ContentLength == 0 {
			return req, close, validate.ErrBodyRequired
		}
		buf, err := io.ReadAll(r.Body)

However, this prevents any additional operations to be performed on r.Body further downstream, due to the fact r.Body has already been read.

This change addresses this shortcoming by re-instantiating r.Body after it has been read.