442 lines
10 KiB
Go
442 lines
10 KiB
Go
package services
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import (
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"context"
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"errors"
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"fmt"
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"io"
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"io/fs"
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"log"
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"os"
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"path/filepath"
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"runtime"
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"strconv"
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"strings"
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"sync"
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rcloneb2 "github.com/rclone/rclone/backend/b2"
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"github.com/kurin/blazer/b2"
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"github.com/rclone/rclone/fs/config/configmap"
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"github.com/rclone/rclone/fs/operations"
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"golang.org/x/sync/semaphore"
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)
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const writers = 4
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const maxConcurrentWeight = 5
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const largeFileSize = 500 * 1024 * 1024 // 500 MB
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type BackBalze struct {
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bucketName string
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dir string
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filePath string
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maxWorkers int
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bbID string
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bbKey string
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}
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func NewBackBlaze(bbID, bbKey string) *BackBalze {
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log.Println("runtime.NumCPU()", runtime.NumCPU())
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return &BackBalze{
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bbID: bbID,
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bbKey: bbKey,
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maxWorkers: runtime.NumCPU(),
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}
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}
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func (b *BackBalze) WithBucket(bucketName string) *BackBalze {
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b.bucketName = bucketName
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return b
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}
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func (b *BackBalze) WithDir(dir string) *BackBalze {
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b.dir = dir
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return b
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}
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func (b *BackBalze) WithFile(filePath string) *BackBalze {
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b.filePath = filePath
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return b
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}
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func (b *BackBalze) Sync(ctx context.Context) error {
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if b.bucketName == "" && (b.filePath == "" || b.dir == "") {
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return fmt.Errorf("bucket name is %v | filePath is %v | dir is %v", b.bucketName, b.filePath, b.dir)
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}
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if b.filePath != "" && b.dir != "" {
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return errors.New("you must select just 1 option, dir or file")
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}
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b2Client, err := b2.NewClient(ctx, b.bbID, b.bbKey)
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if err != nil {
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return fmt.Errorf("b2.NewClient %w", err)
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}
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log.Println("b2Client ok")
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bc, err := b2Client.Bucket(ctx, b.bucketName)
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if err != nil {
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return fmt.Errorf("b2Client.Bucket %w", err)
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}
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if bc == nil {
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return fmt.Errorf("bucket doesn't exist %s", b.bucketName)
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}
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log.Println("bucket found:", bc.Name())
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if b.filePath != "" {
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log.Println("file:", b.filePath)
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if err := copyFile(ctx, bc, b.filePath); err != nil {
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return fmt.Errorf("copyFile %w", err)
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}
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return nil
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}
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if b.dir != "" {
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oldFiles, err := bucketFiles(ctx, bc)
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if err != nil {
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return fmt.Errorf("bucketFiles %w", err)
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}
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log.Println(strings.Repeat("*", 40))
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log.Println("oldFiles to clean:\n\t\t" + strings.Join(oldFiles, "\n\t\t"))
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log.Println(strings.Repeat("*", 40))
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fileChan := make(chan string)
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var wg sync.WaitGroup
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for i := 0; i < b.maxWorkers; i++ {
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wg.Add(1)
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go func() {
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defer wg.Done()
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for src := range fileChan {
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err := copyFile(ctx, bc, src)
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if err != nil {
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log.Printf("error copying file %s: %v\n", src, err)
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continue
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}
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}
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}()
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}
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// Walk the directory and send files to the channel for uploading
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err = filepath.WalkDir(b.dir, func(path string, d fs.DirEntry, err error) error {
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if err != nil {
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return err
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}
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if !d.IsDir() {
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fileChan <- path
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}
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return nil
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})
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if err != nil {
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return fmt.Errorf("error walking the directory: %v", err)
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}
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// Close the channel (no more files to send)
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close(fileChan)
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wg.Wait()
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// Cleanup old files after backup is completed
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if err := cleanBucket(ctx, bc, oldFiles); err != nil {
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return fmt.Errorf("cleanBucket %w", err)
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}
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}
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log.Println("copied successfully")
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return nil
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}
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func (b *BackBalze) OldSync() error {
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if b.bucketName == "" && (b.filePath == "" || b.dir == "") {
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return fmt.Errorf("bucket name is %v | filePath is %v | dir is %v", b.bucketName, b.filePath, b.dir)
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}
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if b.filePath != "" && b.dir != "" {
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return errors.New("you must select just 1 option, dir or file")
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}
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ctx := context.Background()
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b2Client, err := b2.NewClient(ctx, b.bbID, b.bbKey)
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if err != nil {
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return fmt.Errorf("b2.NewClient %w", err)
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}
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log.Println("b2Client ok")
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bc, err := b2Client.Bucket(ctx, b.bucketName)
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if err != nil {
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return fmt.Errorf("b2Client.Bucket %w", err)
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}
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if bc == nil {
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return fmt.Errorf("bucket doesn't exist %s", b.bucketName)
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}
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log.Println("bucket found:", bc.Name())
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if b.filePath != "" {
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log.Println("file:", b.filePath)
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if err := copyFile(ctx, bc, b.filePath); err != nil {
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return fmt.Errorf("copyFile %w", err)
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}
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return nil
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}
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if b.dir != "" {
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oldFiles, err := bucketFiles(ctx, bc)
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if err != nil {
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return fmt.Errorf("bucketFiles %w", err)
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}
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log.Println(strings.Repeat("*", 40))
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log.Println("oldFiles to clean:\n\t\t" + strings.Join(oldFiles, "\n\t\t"))
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log.Println(strings.Repeat("*", 40))
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fileChan := make(chan string)
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uploadSem := semaphore.NewWeighted(maxConcurrentWeight)
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var wg sync.WaitGroup
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for i := 0; i < b.maxWorkers; i++ {
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wg.Add(1)
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go func() {
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defer wg.Done()
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for src := range fileChan {
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info, err := os.Stat(src)
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if err != nil {
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log.Printf("error getting file info %s: %v\n", src, err)
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continue
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}
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weight := int64(1)
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if info.Size() > largeFileSize {
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weight = 2
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}
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if err := uploadSem.Acquire(ctx, weight); err == nil {
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log.Println("start copying file", src)
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if err := copyFile(ctx, bc, src); err != nil {
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log.Printf("error copying file %s: %v\n", src, err)
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}
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uploadSem.Release(weight)
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} else {
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log.Printf("error acquiring semaphore: %v\n", err)
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}
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}
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}()
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}
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// Walk the directory and send files to the channel for uploading
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err = filepath.WalkDir(b.dir, func(path string, d fs.DirEntry, err error) error {
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if err != nil {
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return err
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}
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if !d.IsDir() {
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fileChan <- path
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}
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return nil
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})
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if err != nil {
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return fmt.Errorf("error walking the directory: %v", err)
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}
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// Close the channel (no more files to send)
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close(fileChan)
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wg.Wait()
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// Cleanup old files after backup is completed
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if err := cleanBucket(ctx, bc, oldFiles); err != nil {
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return fmt.Errorf("cleanBucket %w", err)
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}
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}
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log.Println("copied successfully")
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return nil
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}
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func copyFile(ctx context.Context, bucket *b2.Bucket, src string) error {
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f, err := os.Open(src)
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if err != nil {
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return err
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}
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defer f.Close()
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fi, err := f.Stat()
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if err != nil {
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return err
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}
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w := bucket.Object(fi.Name()).NewWriter(ctx)
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w.ConcurrentUploads = writers
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w.UseFileBuffer = true
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log.Println("start copying", fi.Name())
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if _, err := io.Copy(w, f); err != nil {
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w.Close()
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return err
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}
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log.Println("end copying", fi.Name())
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return w.Close()
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}
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func cleanBucket(ctx context.Context, bucket *b2.Bucket, files []string) error {
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var errorBuilder strings.Builder
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for _, v := range files {
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obj := bucket.Object(v)
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if obj == nil {
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log.Println("object is nil", v)
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continue
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}
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if err := obj.Delete(ctx); err != nil {
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errorBuilder.WriteString(fmt.Errorf("error deleting %s : %w", v, err).Error())
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errorBuilder.WriteString("; ")
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}
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}
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if errorBuilder.Len() > 0 {
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return errors.New(errorBuilder.String())
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}
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return nil
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}
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func bucketFiles(ctx context.Context, bucket *b2.Bucket) ([]string, error) {
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bucketIter := bucket.List(ctx)
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if bucketIter == nil {
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return nil, fmt.Errorf("bucket list cannot be nil")
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}
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var files []string
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for {
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if !bucketIter.Next() {
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if bucketIter.Err() != nil {
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return nil, fmt.Errorf("bucketIter err %w", bucketIter.Err())
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}
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break
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}
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if bucketIter.Object() == nil {
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log.Println("bucketIter Object is nil")
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continue
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}
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files = append(files, bucketIter.Object().Name())
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}
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return files, nil
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}
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type duplicate struct {
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bucket string
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file string
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count int
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}
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func (d duplicate) dir() string {
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if !strings.Contains(d.file, "/") {
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return d.bucket
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}
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splitted := strings.Split(d.file, "/")
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return strings.Join(splitted[:(len(splitted)-1)], "/")
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}
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func (b *BackBalze) CleanUp(ctx context.Context, cancel context.CancelFunc) error {
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b2Client, err := b2.NewClient(ctx, b.bbID, b.bbKey)
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if err != nil {
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return fmt.Errorf("b2.NewClient %w", err)
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}
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log.Println("b2Client ok")
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dups, err := b.listDuplicates(ctx, cancel, b2Client)
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if err != nil {
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return fmt.Errorf("b.listDuplicates: %w", err)
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}
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if len(dups) <= 0 {
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return nil
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}
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for _, d := range dups {
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smpl := configmap.Simple{}
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smpl.Set("account", b.bbID)
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smpl.Set("key", b.bbKey)
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smpl.Set("chunk_size", strconv.FormatInt(int64(9600), 10))
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f, err := rcloneb2.NewFs(ctx, "B2", d.dir(), smpl)
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if err != nil {
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return fmt.Errorf("rclonefs.NewFs %w", err)
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}
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if err := operations.CleanUp(ctx, f); err != nil {
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return fmt.Errorf("operations.CleanUp %w", err)
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}
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}
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return nil
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}
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func (b *BackBalze) ListDuplicateVersions(ctx context.Context, cancel context.CancelFunc) error {
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b2Client, err := b2.NewClient(ctx, b.bbID, b.bbKey)
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if err != nil {
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return fmt.Errorf("b2.NewClient %w", err)
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}
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log.Println("b2Client ok")
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dups, err := b.listDuplicates(ctx, cancel, b2Client)
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if err != nil {
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return fmt.Errorf("b.listDuplicates: %w", err)
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}
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if len(dups) > 0 {
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var builder strings.Builder
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for _, dup := range dups {
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builder.WriteString(fmt.Sprintf("%+v\n", dup))
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}
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return fmt.Errorf("found duplicates: %s", builder.String())
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}
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return nil
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}
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func (b *BackBalze) listDuplicates(ctx context.Context, cancel context.CancelFunc, b2Client *b2.Client) ([]duplicate, error) {
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buckets, err := b2Client.ListBuckets(ctx)
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if err != nil {
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return nil, fmt.Errorf("b2Client.Bucket %w", err)
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}
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wg := sync.WaitGroup{}
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dups := make([]duplicate, 0)
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log.Println("len(buckets)", len(buckets))
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sm := semaphore.NewWeighted(int64(b.maxWorkers))
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wg.Add(len(buckets))
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for _, bc := range buckets {
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if err := sm.Acquire(ctx, 1); err != nil {
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return nil, fmt.Errorf("sm.Acquire %w", err)
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}
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go func(bc *b2.Bucket) {
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defer sm.Release(1)
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defer wg.Done()
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files := make(map[string]int, 0)
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bucketIter := bc.List(ctx, b2.ListHidden())
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if bucketIter == nil {
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log.Println("bucket list cannot be nil")
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return
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}
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for {
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if !bucketIter.Next() {
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if bucketIter.Err() != nil {
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log.Println("bucketIter err %w", bucketIter.Err())
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return
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}
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break
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}
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if bucketIter.Object() == nil {
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log.Println("bucketIter Object is nil")
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continue
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}
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files[bucketIter.Object().Name()]++
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}
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// Search duplicates
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for file, count := range files {
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if count > 1 {
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dups = append(dups, duplicate{
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bucket: bc.Name(),
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file: file,
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count: count,
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})
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}
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}
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}(bc)
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}
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wg.Wait()
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return dups, nil
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}
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