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// Copyright 2013 Beego Authors
// Copyright 2014 The Macaron Authors
//
// Licensed under the Apache License, Version 2.0 (the "License"): you may
// not use this file except in compliance with the License. You may obtain
// a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations
// under the License.
package session
import (
"bytes"
"crypto/rand"
"encoding/gob"
"io"
"github.com/unknwon/com"
)
func init() {
gob.Register([]interface{}{})
gob.Register(map[int]interface{}{})
gob.Register(map[string]interface{}{})
gob.Register(map[interface{}]interface{}{})
gob.Register(map[string]string{})
gob.Register(map[int]string{})
gob.Register(map[int]int{})
gob.Register(map[int]int64{})
}
// EncodeGob encodes obj with gob
func EncodeGob(obj map[interface{}]interface{}) ([]byte, error) {
for _, v := range obj {
gob.Register(v)
}
buf := bytes.NewBuffer(nil)
err := gob.NewEncoder(buf).Encode(obj)
return buf.Bytes(), err
}
// DecodeGob decodes bytes to obj
func DecodeGob(encoded []byte) (out map[interface{}]interface{}, err error) {
buf := bytes.NewBuffer(encoded)
err = gob.NewDecoder(buf).Decode(&out)
return out, err
}
// NOTE: A local copy in case of underlying package change
var alphanum = []byte("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")
// generateRandomKey creates a random key with the given strength.
func generateRandomKey(strength int) []byte {
k := make([]byte, strength)
if n, err := io.ReadFull(rand.Reader, k); n != strength || err != nil {
return com.RandomCreateBytes(strength, alphanum...)
}
return k
}
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