func ValueFromRequest(r *http.Request, field string) (string, bool) {
	values := r.URL.Query()
	_, exists := values[field]
	return values.Get(field), exists
}
func ValueFromRequest(r *http.Request, field string) (string, bool) {
	values := r.URL.Query()
	_, exists := values[field]
	return values.Get(field), exists
}
func ValueFromRequest ( r * http . Request , field string ) ( string , bool ) { values := r . URL . Query ( ) _ , exists := values [ field ] return values . Get ( field ) , exists }
// ValueFromRequest returns the value of a field in the http request. The boolean value is
// set to true if the field exists in the query.
ValueFromRequest returns the value of a field in the http request . The boolean value is set to true if the field exists in the query .