golang调用javascript

最近写一个程序，接口返回的数据是js格式的，需要通过golang来解析js，so 找到了一个好用的库otto

使用起来简单，函数就三个

vm:=otto.New()vm.Run("js code")

demo实现golang和javascript的互相调用

• demo1 输入javascript变量abc

• demo2 调用javascript函数hello

• demo3 javascript调用golang函数add

package main

import (
    "fmt"
    "github.com/robertkrimen/otto"
)

func main() {
    fmt.Println("1.print javascript variables")

    vm := otto.New()
    vm.Run(`
    abc = 2 + 2;
    console.log("The value of abc is " + abc); // 4
`)
    if value, err := vm.Get("abc"); err == nil {
        if value_int, err := value.ToInteger(); err == nil {
            fmt.Println(value_int)
        }
    }

    fmt.Println("\n2.call javascript function")
    vm.Run(`
    function hello(name){
        console.log('hello ' + name)
        return 'OK'
    }
`)

    ret, _ := vm.Call("hello", nil, "zhangsan")
    fmt.Println(ret)

    fmt.Println("\n3.call go func")
    vm.Set("add", func(call otto.FunctionCall) otto.Value {
        fmt.Println("call from js")
        arg1, _ := call.Argument(0).ToInteger()
        arg2, _ := call.Argument(1).ToInteger()
        result, _ := vm.ToValue(arg1 + arg2)
        return result
    })

    vm.Run(`
    sum = add(1,10);
    console.log('sum: ' + sum);
`)

}