mirror of
https://github.com/yunionio/cloudpods.git
synced 2026-05-08 06:31:00 +08:00
94 lines
2.6 KiB
Go
94 lines
2.6 KiB
Go
// Copyright 2019 Yunion
|
|
//
|
|
// 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 userdata
|
|
|
|
import (
|
|
"bytes"
|
|
"compress/gzip"
|
|
"encoding/base64"
|
|
"io/ioutil"
|
|
"strings"
|
|
|
|
"yunion.io/x/pkg/errors"
|
|
"yunion.io/x/pkg/util/cloudinit"
|
|
"yunion.io/x/pkg/util/osprofile"
|
|
|
|
"yunion.io/x/onecloud/pkg/httperrors"
|
|
)
|
|
|
|
const (
|
|
UserdataLimitSize = 64 * 1024 // 64 KB
|
|
)
|
|
|
|
func Encode(userdata string) (string, error) {
|
|
var buf bytes.Buffer
|
|
|
|
gz := gzip.NewWriter(&buf)
|
|
if _, err := gz.Write([]byte(userdata)); err != nil {
|
|
return "", errors.Wrap(err, "failed to gzip userdata")
|
|
}
|
|
if err := gz.Close(); err != nil {
|
|
return "", errors.Wrap(err, "close gzip")
|
|
}
|
|
return base64.StdEncoding.EncodeToString(buf.Bytes()), nil
|
|
}
|
|
|
|
func Decode(encodeUserdata string) (string, error) {
|
|
gzData, err := base64.StdEncoding.DecodeString(encodeUserdata)
|
|
if err != nil {
|
|
return "", errors.Wrap(err, "base64 decode gzip data")
|
|
}
|
|
gr, err := gzip.NewReader(bytes.NewBuffer(gzData))
|
|
if err != nil {
|
|
return "", errors.Wrap(err, "new reader")
|
|
}
|
|
defer gr.Close()
|
|
data, err := ioutil.ReadAll(gr)
|
|
if err != nil {
|
|
return "", errors.Wrap(err, "read data")
|
|
}
|
|
return string(data), nil
|
|
}
|
|
|
|
func ValidateUserdata(data string, osType string) error {
|
|
if len(data) == 0 {
|
|
return nil
|
|
}
|
|
_, err := cloudinit.ParseUserData(data)
|
|
if err != nil {
|
|
if osType == osprofile.OS_TYPE_WINDOWS {
|
|
if strings.HasPrefix(data, "[bat]\n") || strings.HasPrefix(data, "[powershell]\n") {
|
|
// valid
|
|
} else {
|
|
return errors.Wrap(httperrors.ErrInputParameter, "invalid windows scripts")
|
|
}
|
|
} else {
|
|
if strings.HasPrefix(data, "#!/bin/sh\n") || strings.HasPrefix(data, "#!/bin/bash\n") || strings.HasPrefix(data, "#!/usr/bin/env bash") {
|
|
// valid
|
|
} else {
|
|
return errors.Wrap(httperrors.ErrInputParameter, "invalid shell scripts")
|
|
}
|
|
}
|
|
}
|
|
encodeData, err := Encode(data)
|
|
if err != nil {
|
|
return errors.Wrapf(httperrors.ErrInputParameter, "Encode data error %s", err)
|
|
}
|
|
if len(encodeData) > UserdataLimitSize {
|
|
return errors.Wrapf(httperrors.ErrInputParameter, "user data size %d large limit %d", len(encodeData), UserdataLimitSize)
|
|
}
|
|
return nil
|
|
}
|