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backup_helper_full.go
180 lines (173 loc) · 4.01 KB
/
backup_helper_full.go
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package cloud
import (
"errors"
"os"
"path"
"path/filepath"
"regexp"
"strings"
"github.com/admpub/checksum"
"github.com/admpub/log"
"github.com/admpub/nging/v4/application/library/common"
"github.com/admpub/nging/v4/application/library/config"
"github.com/admpub/nging/v4/application/library/s3manager/s3client"
"github.com/admpub/nging/v4/application/model"
"github.com/syndtr/goleveldb/leveldb"
"github.com/webx-top/com"
"github.com/webx-top/echo"
"github.com/webx-top/echo/defaults"
)
var (
// ErrRunningPleaseWait 正在运行中
ErrRunningPleaseWait = errors.New("running, please wait")
fullBackupExit bool
)
func fullBackupIsRunning(id uint) bool {
idKey := com.String(id)
key := `cloud.backup-task.` + idKey
return echo.Bool(key)
}
func fileFilter(recv *model.CloudBackupExt) (func(string) bool, error) {
var (
re *regexp.Regexp
err error
)
if len(recv.IgnoreRule) > 0 {
re, err = regexp.Compile(recv.IgnoreRule)
if err != nil {
return nil, err
}
}
return func(file string) bool {
switch filepath.Ext(file) {
case ".swp":
return false
case ".tmp", ".TMP":
return false
default:
if strings.Contains(file, echo.FilePathSeparator+`.`) { // 忽略所有以点号开头的文件
return false
}
if re != nil {
if re.MatchString(file) {
return false
}
}
return true
}
}, nil
}
// 全量备份
func fullBackupStart(recv *model.CloudBackupExt) error {
idKey := com.String(recv.Id)
key := `cloud.backup-task.` + idKey
if echo.Bool(key) {
return ErrRunningPleaseWait
}
echo.Set(key, true)
sourcePath := recv.SourcePath
debug := !config.FromFile().Sys.IsEnv(`prod`)
recv.Storage.Secret = common.Crypto().Decode(recv.Storage.Secret)
filter, err := fileFilter(recv)
if err != nil {
return err
}
cacheDir := filepath.Join(echo.Wd(), `data/cache/backup-db`)
if err := com.MkdirAll(cacheDir, os.ModePerm); err != nil {
return err
}
cacheFile := filepath.Join(cacheDir, idKey)
mgr := s3client.New(recv.Storage, config.FromFile().Sys.EditableFileMaxBytes())
if err := mgr.Connect(); err != nil {
return err
}
go func() {
defer func() {
echo.Delete(key)
}()
ctx := defaults.NewMockContext()
recv.SetContext(ctx)
db, err := leveldb.OpenFile(cacheFile, nil)
if err != nil {
recv.UpdateFields(nil, echo.H{
`result`: err.Error(),
`status`: `failure`,
}, `id`, recv.Id)
return
}
defer db.Close()
fullBackupExit = false
err = filepath.Walk(sourcePath, func(ppath string, info os.FileInfo, err error) error {
if err != nil {
return err
}
if fullBackupExit {
return echo.ErrExit
}
if info.IsDir() {
return nil
}
if !filter(ppath) {
return filepath.SkipDir
}
var oldMd5 string
dbKey := com.Str2bytes(ppath)
cv, ce := db.Get(dbKey, nil)
if ce != nil {
if ce != leveldb.ErrNotFound {
return ce
}
} else {
oldMd5 = string(cv)
}
md5, err := checksum.MD5sum(ppath)
if err != nil {
return err
}
if oldMd5 == md5 {
if debug {
log.Info(ppath, `: 文件备份过并且没有改变【跳过】`)
}
return nil
}
if debug {
if len(oldMd5) > 0 {
log.Info(ppath, `: 文件备份过并且有更改【更新】`)
} else {
log.Info(ppath, `: 文件未曾备份过【添加】`)
}
}
objectName := path.Join(recv.DestPath, strings.TrimPrefix(ppath, sourcePath))
fp, err := os.Open(ppath)
if err != nil {
log.Error(err)
return err
}
defer func() {
fp.Close()
err = db.Put(dbKey, com.Str2bytes(md5), nil)
if err != nil {
log.Error(err)
}
}()
return mgr.Put(ctx, fp, objectName, info.Size())
})
if err != nil {
if err == echo.ErrExit {
log.Info(`强制退出全量备份`)
} else {
recv.UpdateFields(nil, echo.H{
`result`: err.Error(),
`status`: `failure`,
}, `id`, recv.Id)
}
} else {
recv.UpdateFields(nil, echo.H{
`result`: ctx.T(`全量备份完成`),
`status`: `idle`,
}, `id`, recv.Id)
}
fullBackupExit = false
}()
return nil
}