/
uploader.go
167 lines (148 loc) · 4.48 KB
/
uploader.go
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package main
import (
"fmt"
"github.com/lolgopher/synology-filesync/protocol"
"github.com/pkg/errors"
"log"
"os"
"path/filepath"
"strings"
"time"
)
func uploadRemote(info *protocol.ConnectionInfo) {
wg.Add(1)
go func() {
defer func() {
wg.Done()
}()
// ssh client 생성
client, err := protocol.NewSFTPClient(info)
if err != nil {
log.Fatalf("fail to make srtp client: %v", err)
}
defer func() {
if err := client.Close(); err != nil {
log.Printf("fail to close sftp client: %v", err)
}
}()
if err := searchLocal(client, filepath.Join(config.LocalPath, config.Synology.Path)); err != nil {
log.Fatalf("fail to search local: %v", err)
}
}()
log.Print("Upload...")
wg.Wait()
log.Print("Done!")
}
func searchLocal(sftp *protocol.SFTPClient, folderPath string) error {
// 파일 시스템에서 파일 검색
err := filepath.Walk(folderPath, func(targetPath string, info os.FileInfo, err error) error {
if err != nil {
return err
}
if !info.IsDir() && info.Name() != "metadata.yaml" {
// 전송에 성공했는지 확인
targetMetadata, err := protocol.ReadMetadata(filepath.Dir(targetPath), config.YAML.Filename)
if err != nil {
return err
}
metadata, ok := targetMetadata[targetPath]
if !ok {
return fmt.Errorf("fail to find %s in metadata", targetPath)
}
switch protocol.FileTransferStatus(metadata.Status) {
case protocol.Init:
log.Printf("%s is init metadata status", targetPath)
return nil
case protocol.Sent:
log.Printf("%s has already been sent", targetPath)
return nil
case protocol.Failed:
log.Printf("%s sent failed", targetPath)
return nil
case protocol.NotSent:
var result protocol.FileTransferStatus
if size, err := sendFileOverSFTP(&sftp, targetPath); err != nil {
// 전송에 실패했을때
result = protocol.Failed
log.Printf("fail to %s not sent file: %v", targetPath, err)
} else {
// 전송에 성공했을때
result = protocol.Sent
// 이미 전송되었다면
if size == 0 {
log.Printf("same size file %s already exist", targetPath)
} else {
log.Printf("%s: %d", targetPath, size)
}
}
if err := protocol.WriteMetadata(targetPath, config.YAML.Filename, 0, result); err != nil {
return err
}
time.Sleep(time.Duration(config.UploadDelay) * time.Second)
default:
log.Printf("%s is unknown status", metadata.Status)
return nil
}
}
return nil
})
return err
}
func sendFileOverSFTP(sftp **protocol.SFTPClient, targetPath string) (int, error) {
var lastError error
size := 0
for i := 0; i < config.UploadRetryCount; i++ {
destPath, _ := strings.CutPrefix(targetPath, config.LocalPath)
destPath = filepath.Join(config.SSH.Path, destPath)
// 용량 확인
targetFileInfo, err := os.Stat(targetPath)
if err != nil {
lastError = fmt.Errorf("fail to get %s file info: %v", targetFileInfo, err)
log.Print(lastError.Error())
}
stat, err := (*sftp).Client.StatVFS("/storage/emulated")
if err != nil {
lastError = errors.Wrap(err, "fail to get storage directory information")
log.Print(lastError.Error())
}
if targetFileInfo != nil && stat != nil {
if targetSize, freeSize := uint64(targetFileInfo.Size()), stat.FreeSpace(); targetSize+config.SpareSpace > freeSize {
lastError = fmt.Errorf("not enough space (\n"+
"\ttarget file size: %d\n"+
"\tfree space: %d\n"+
"\tspare space: %d\n)", targetSize, freeSize, config.SpareSpace)
log.Printf(lastError.Error())
log.Printf("retrying...")
time.Sleep(time.Duration(config.UploadRetryDelay) * time.Second)
continue
}
}
// 파일 전송
size, err = (*sftp).SendFile(targetPath, destPath)
if err != nil {
lastError = fmt.Errorf("fail to %s send file over sftp: %v", targetPath, err)
log.Print(lastError.Error())
errStr := errors.Cause(err).Error()
if strings.Contains(errStr, "connection lost") ||
strings.Contains(errStr, "no route to host") {
// ssh client 재생성
newSFTP, err := protocol.NewSFTPClient((*sftp).ConnInfo)
if err != nil {
log.Fatalf("fail to make sftp client: %v", err)
} else {
_ = (*sftp).Close()
sftp = &newSFTP
}
}
// 기존 파일 삭제
if err := (*sftp).RemoveFile(destPath); err != nil {
log.Printf("fail to remove %s remote file: %v", destPath, err)
}
log.Printf("retrying...")
time.Sleep(time.Duration(config.UploadRetryDelay) * time.Second)
} else {
break
}
}
return size, lastError
}