i want to use a normal func instead of a HttpHandler when receiving a http call so i should dynamic new params to call the func.
package main
import (
"fmt"
"reflect"
)
func main() {
invoke(test)
}
func invoke(function interface{}) {
funcType := reflect.TypeOf(function)
if funcType.Kind() == reflect.Func {
paramType := funcType.In(0).Elem()
input := reflect.New(paramType)
input.Elem().Field(0).SetString("neason")
input.Elem().Field(1).SetInt(18)
fmt.Println(input)
funcValue := reflect.ValueOf(function)
params := []reflect.Value{
reflect.ValueOf(input),
}
funcValue.Call(params)
}
}
type Input struct {
Name string
Age int
}
type Output struct {
Name string
Age int
}
func test(input *Input) Output {
return Output{
Name: input.Name,
Age: input.Age,
}
}
it will panic: reflect: Call using *reflect.Value as type *main.Input how to dynamic reflect.New params and call the func ?
You have an extra layer of reflect.Value
wrappers. Use input
directly as the parameter. It's already a reflect.Value
.
params := []reflect.Value{input}