mirror of
https://github.com/yunionio/cloudpods.git
synced 2026-05-07 22:24:32 +08:00
94 lines
2.6 KiB
Go
94 lines
2.6 KiB
Go
// Copyright 2019 Yunion
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package userdata
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import (
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"bytes"
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"compress/gzip"
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"encoding/base64"
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"io/ioutil"
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"strings"
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"yunion.io/x/pkg/errors"
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"yunion.io/x/pkg/util/cloudinit"
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"yunion.io/x/pkg/util/osprofile"
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"yunion.io/x/onecloud/pkg/httperrors"
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)
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const (
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UserdataLimitSize = 64 * 1024 // 64 KB
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)
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func Encode(userdata string) (string, error) {
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var buf bytes.Buffer
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gz := gzip.NewWriter(&buf)
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if _, err := gz.Write([]byte(userdata)); err != nil {
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return "", errors.Wrap(err, "failed to gzip userdata")
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}
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if err := gz.Close(); err != nil {
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return "", errors.Wrap(err, "close gzip")
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}
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return base64.StdEncoding.EncodeToString(buf.Bytes()), nil
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}
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func Decode(encodeUserdata string) (string, error) {
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gzData, err := base64.StdEncoding.DecodeString(encodeUserdata)
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if err != nil {
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return "", errors.Wrap(err, "base64 decode gzip data")
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}
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gr, err := gzip.NewReader(bytes.NewBuffer(gzData))
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if err != nil {
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return "", errors.Wrap(err, "new reader")
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}
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defer gr.Close()
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data, err := ioutil.ReadAll(gr)
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if err != nil {
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return "", errors.Wrap(err, "read data")
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}
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return string(data), nil
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}
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func ValidateUserdata(data string, osType string) error {
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if len(data) == 0 {
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return nil
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}
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_, err := cloudinit.ParseUserData(data)
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if err != nil {
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if osType == osprofile.OS_TYPE_WINDOWS {
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if strings.HasPrefix(data, "[bat]\n") || strings.HasPrefix(data, "[powershell]\n") {
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// valid
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} else {
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return errors.Wrap(httperrors.ErrInputParameter, "invalid windows scripts")
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}
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} else {
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if strings.HasPrefix(data, "#!/bin/sh\n") || strings.HasPrefix(data, "#!/bin/bash\n") || strings.HasPrefix(data, "#!/usr/bin/env bash") {
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// valid
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} else {
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return errors.Wrap(httperrors.ErrInputParameter, "invalid shell scripts")
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}
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}
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}
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encodeData, err := Encode(data)
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if err != nil {
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return errors.Wrapf(httperrors.ErrInputParameter, "Encode data error %s", err)
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}
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if len(encodeData) > UserdataLimitSize {
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return errors.Wrapf(httperrors.ErrInputParameter, "user data size %d large limit %d", len(encodeData), UserdataLimitSize)
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}
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return nil
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}
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