marshal and unmarshal of json/toml

json_toml_marshal_unmarshal.go

import (
    "bytes"
    "encoding/json"
    "errors"
    "fmt"
    "github.com/BurntSushi/toml"
    "errors"
)

// borrowed from golang playgroud:
//    https://play.golang.org/p/Kd7TRoRG5w
func JsonMapToStruct(input map[string]interface{}, val interface{}) error {
    tmp, err := json.Marshal(input)
    if err != nil {
        errmsg := fmt.Sprintf("json marshal failure: %s", err)
        return errors.New(errmsg)
    }
    err = json.Unmarshal(tmp, val)
    if err != nil {
        errmsg := fmt.Sprintf("json unmarshal failure: %s", err)
        return errors.New(errmsg)
    }
    return nil
}

func TomlMapToStruct(input map[string]interface{}, outputs interface{}) error {

    var buf bytes.Buffer
    encoder := toml.NewEncoder(&buf)
    err := encoder.Encode(input)
    if err != nil {
        errmsg := fmt.Sprintf("toml encode toml failure: %s", err)
        return errors.New(errmsg)
    }

    if _, err := toml.Decode(buf.String(), outputs); err != nil {
        errmsg := fmt.Sprintf("toml decode toml failure: %s", err)
        return errors.New(errmsg)
    }

    return nil
}