go-echo get POST body

Question

I have an audit log middleware which trying to log details of each grpc function call. Currently I can get request method and url. But I'm not able to get the values in Post body.

Also this middleware is use to log multiple functions which contains different post body. Is this possible?

This is what I have now:

package main

func main() {
e := echo.New()
e.Use(grpcGatewayMiddleware(mux, func(c echo.Context) bool {
    return strings.HasPrefix(c.Path(), "/skip")
}))
e.Use(logMiddleware)
...
}

func Middleware(config auth.Config) echo.MiddlewareFunc {
    return func(next echo.HandlerFunc) echo.HandlerFunc {
        return func(c echo.Context) (err error) {
            message := Message {
                Method: c.Request().Method,
                Url:    c.Request().RequestURI,
                Prams:  c.Request().Form.Encode(),
            }
            log(message)
        }
    }
}

func grpcGatewayMiddleware(mux *runtime.ServeMux, skipper middleware.Skipper) echo.MiddlewareFunc {
    if skipper == nil {
        skipper = middleware.DefaultSkipper
    }
    return func(next echo.HandlerFunc) echo.HandlerFunc {
        return func(c echo.Context) error {
            if skipper(c) {
                return next(c)
            }
            mux.ServeHTTP(c.Response(), c.Request())
            return next(c)
        }
    }
}