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iqingfeng / ngrok

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pack.go 895 Bytes
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Pascal Borreli 提交于 2014-04-15 21:42 . Fixed typos
package msg
import (
"encoding/json"
"errors"
"fmt"
"reflect"
)
func unpack(buffer []byte, msgIn Message) (msg Message, err error) {
var env Envelope
if err = json.Unmarshal(buffer, &env); err != nil {
return
}
if msgIn == nil {
t, ok := TypeMap[env.Type]
if !ok {
err = errors.New(fmt.Sprintf("Unsupported message type %s", env.Type))
return
}
// guess type
msg = reflect.New(t).Interface().(Message)
} else {
msg = msgIn
}
err = json.Unmarshal(env.Payload, &msg)
return
}
func UnpackInto(buffer []byte, msg Message) (err error) {
_, err = unpack(buffer, msg)
return
}
func Unpack(buffer []byte) (msg Message, err error) {
return unpack(buffer, nil)
}
func Pack(payload interface{}) ([]byte, error) {
return json.Marshal(struct {
Type string
Payload interface{}
}{
Type: reflect.TypeOf(payload).Elem().Name(),
Payload: payload,
})
}
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