forked from miaokobot/miaospeed
/
helpers.go
58 lines (50 loc) · 1.35 KB
/
helpers.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
package helpers
import (
"fmt"
"reflect"
"github.com/dop251/goja"
jsoniter "github.com/json-iterator/go"
)
func VMCheck(v goja.Value) bool {
return v != nil && !goja.IsNull(v) && !goja.IsUndefined(v)
}
func VMSafeStr(v goja.Value) (string, bool) {
if VMCheck(v) && v.ExportType().Kind() == reflect.String {
return v.Export().(string), true
}
return "", false
}
func VMSafeBool(v goja.Value) (bool, bool) {
if VMCheck(v) && v.ExportType().Kind() == reflect.Bool {
return v.Export().(bool), true
}
return false, false
}
func VMSafeInt64(v goja.Value) (int64, bool) {
if VMCheck(v) && v.ExportType().Kind() == reflect.Int64 {
return v.Export().(int64), true
}
return 0, false
}
func VMSafeObj(vm *goja.Runtime, v goja.Value) (*goja.Object, bool) {
if VMCheck(v) && v.ExportType().Kind() == reflect.Map {
vo := v.ToObject(vm)
if vo != nil {
return vo, true
}
}
return nil, false
}
func VMSafeMarshal(target interface{}, obj goja.Value, vm *goja.Runtime) error {
if fn, ok := goja.AssertFunction(vm.Get("__json_stringify")); ok {
ret, _ := fn(goja.Undefined(), obj)
if v, ok := VMSafeStr(ret); ok {
if v == "" {
return fmt.Errorf("cannot marshal an empty string")
}
return jsoniter.UnmarshalFromString(v, target)
}
return fmt.Errorf("cannot read from stringify function")
}
return fmt.Errorf("cannot find stringify function")
}