最近有个需求需要在Go项目里面执行动态脚本，github上有好几个lua执行解释器，但是有很多要不就很久没维护了，要不就没有什么文档，经过几个对比我最后用的是 https://github.com/yuin/gopher-lua。JS解析器用的github.com/robertkrimen/otto。

具体测试代码如下，给有需求的朋友参考。

github地址

package main

import (
    "fmt"
    "github.com/robertkrimen/otto"
    "github.com/yuin/gluamapper"
    "github.com/yuin/gopher-lua"
    "time"
)

//function add(a, b)
//return a+b
//end
var luaCode = `
function testFun(tab)
    result = {}
    result["key"] = "test"
    result["key1"] = "val2"

    if(tab["user"]=="test")then
        result["title"]="good"
    end
    if(tab["os"]=="ios")then
        result["url"]="http://www.google.com"
    else
        result["url"]="http://www.baidu.com"
    end
    
    return result
end
`

func main() {
    dic := make(map[string]string)
    dic["user"] = "test"
    dic["os"] = "ios"
    dic["version"] = "1.0"

    start0 := time.Now()
    count := 10000
    for i := 0; i < count; i++ {
        LuaTest(dic)
    }
    tmp1 := time.Since(start0).Nanoseconds() / 1000 / 1000

    start1 := time.Now()
    for i := 0; i < count; i++ {
        JsTest(dic)
    }
    tmp2 := time.Since(start1).Nanoseconds() / 1000 / 1000
    fmt.Printf("LuaTest : %d,JsTest : %d", tmp1, tmp2)

}

func LuaTest(dic map[string]string) {
    L := lua.NewState()
    defer L.Close()
    if err := L.DoString(luaCode); err != nil {
        panic(err)
    }
    table := L.NewTable()
    for k, v := range dic {
        L.SetTable(table, lua.LString(k), lua.LString(v))
    }

    if err := L.CallByParam(lua.P{
        Fn:      L.GetGlobal("testFun"),
        NRet:    1,
        Protect: true,
    }, table); err != nil {
        panic(err)
    }
    ret := L.Get(-1) // returned value
    L.Pop(1)         // remove received value
    obj := gluamapper.ToGoValue(ret, gluamapper.Option{NameFunc: printTest})
    fmt.Println(obj)
}

func printTest(s string) string {
    return s
}

func JsTest(dic map[string]string) {
    vm := otto.New()
    v, err := vm.Run(`
function testFun(tab) {
    result = {}
    result["key"] = "test"
    result["key1"] = "val2"
     if(tab["user"]=="test"){
       result["title"]="good"
    }
    if(tab["os"]=="ios"){
        result["url"]="http://www.google.com"
    }else{
        result["url"]="http://www.baidu.com"
    }
    return result
}
`)
    if err == nil {
        fmt.Println(v)
    }
    jsa, err := vm.ToValue(dic)
    if err != nil {
        panic(err)
    }
    result, err := vm.Call("testFun", nil, jsa)


    tmpR, err := result.Export()
    fmt.Println("object: ", tmpR)

}