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sftp.go
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sftp.go
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package simpleuploader
import (
"io"
"log"
"os"
"path/filepath"
"strings"
"time"
)
import (
"github.com/IAkumaI/retry"
"github.com/pkg/errors"
"github.com/pkg/sftp"
"golang.org/x/crypto/ssh"
)
type SFTPUploader struct {
host string
login string
password string
pathPrefix string
dir string
urlPrefix string
}
// NewSFTP создает настроенный SFTPUploader(s) uploader
func NewSFTP(addr string, login string, password string, dir string, pathPrefix string, urlPrefix string) Uploader {
return &SFTPUploader{
host: addr,
login: login,
password: password,
dir: dir,
pathPrefix: pathPrefix,
urlPrefix: urlPrefix,
}
}
func (uploader *SFTPUploader) Upload(file *os.File, name string) (string, error) {
result := ""
storPath := uploader.pathPrefix + "/" + name
if uploader.dir != "" {
storPath = strings.TrimRight(uploader.dir, "/") + "/" + strings.TrimLeft(storPath, "/")
}
err := retry.Do(10, func(retryCount int) error {
_, err := file.Seek(0, io.SeekStart)
if err != nil {
log.Println("Can not seek to file start")
log.Printf("Retry in 5 sec... (%d)\n", retryCount)
time.Sleep(time.Second * 5)
return err
}
config := &ssh.ClientConfig{
User: uploader.login,
Auth: []ssh.AuthMethod{ssh.Password(uploader.password)},
Timeout: 30 * time.Second,
HostKeyCallback: ssh.InsecureIgnoreHostKey(),
}
conn, err := ssh.Dial("tcp", uploader.host, config)
if err != nil {
log.Printf("Не удается подключиться к SFTP(%d): %v\n", retryCount, err)
log.Printf("Retry in 5 sec... (%d)\n", retryCount)
time.Sleep(time.Second * 5)
return err
}
client, err := sftp.NewClient(conn)
if err != nil {
log.Printf("Не удается создать клиент SFTP(%d): %v\n", retryCount, err)
log.Printf("Retry in 5 sec... (%d)\n", retryCount)
time.Sleep(time.Second * 5)
return err
}
defer client.Close()
err = client.MkdirAll(filepath.Dir(storPath))
if err != nil {
log.Printf("Не удается создать директорию SFTP(%d): %v\n", retryCount, err)
log.Printf("Retry in 5 sec... (%d)\n", retryCount)
time.Sleep(time.Second * 5)
return err
}
time.Sleep(50 * time.Millisecond)
dstFile, err := client.OpenFile(storPath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC)
if err != nil {
log.Printf("Не удается создать файл на SFTP(%d): %v\n", retryCount, err)
log.Printf("Retry in 5 sec... (%d)\n", retryCount)
time.Sleep(time.Second * 5)
return err
}
defer dstFile.Close()
time.Sleep(50 * time.Millisecond)
bytes, err := io.Copy(dstFile, file)
if err != nil {
log.Printf("Не удается записать файл на SFTP(%d): %v\n", retryCount, err)
log.Printf("Retry in 5 sec... (%d)\n", retryCount)
time.Sleep(time.Second * 5)
return err
}
if bytes == 0 {
log.Printf("Не удается записать файл (0 байт) на SFTP(%d)\n", retryCount)
log.Printf("Retry in 5 sec... (%d)\n", retryCount)
time.Sleep(time.Second * 5)
return errors.New("Zero bytes written")
}
result = uploader.urlPrefix + uploader.pathPrefix + "/" + name
return nil
})
if err != nil {
return "", err
}
return result, nil
}