/
sftp.go
106 lines (89 loc) · 2.58 KB
/
sftp.go
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package sftp
import (
"fmt"
"io"
"os"
"path/filepath"
"golang.org/x/crypto/ssh"
)
const (
// PasswordAuth indicates password-based authentication
PasswordAuth = "passwordAuth"
// KeyAuth indicates key-based authentication
KeyAuth = "keyAuth"
)
// FileManager is an interface for managing files on a remote server
type FileManager interface {
Upload(localFilePath, remoteDir string) error
Download(remoteFilePath, localDir string) error
Delete(remoteFilePath string) error
}
// fileManagerImpl is a real implementation of FileManager
type fileManagerImpl struct {
client Client
}
func NewFileManager(sshClient *ssh.Client) (FileManager, error) {
sftpClient, err := newSFTPClient(sshClient)
if err != nil {
return nil, fmt.Errorf("cannot create SFTP client: %w", err)
}
return &fileManagerImpl{client: sftpClient}, nil
}
// Upload uploads a file to the remote server
func (fm *fileManagerImpl) Upload(localFilePath, remoteFilePath string) error {
localFile, err := os.Open(localFilePath)
if err != nil {
return fmt.Errorf("cannot open local file: %w", err)
}
defer func() {
_ = localFile.Close()
}()
// Create the directory if it does not exist
remoteDir := filepath.Dir(remoteFilePath)
if err := fm.client.MkdirAll(remoteDir); err != nil {
return fmt.Errorf("cannot create remote directory: %w", err)
}
remoteFile, err := fm.client.OpenFile(remoteFilePath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC)
if err != nil {
return fmt.Errorf("cannot create remote file: %w", err)
}
defer func() {
_ = remoteFile.Close()
}()
_, err = io.Copy(remoteFile, localFile)
if err != nil {
return fmt.Errorf("error copying file: %w", err)
}
return nil
}
// Download downloads a file from the remote server
func (fm *fileManagerImpl) Download(remoteFilePath, localDir string) error {
remoteFile, err := fm.client.OpenFile(remoteFilePath, os.O_RDONLY)
if err != nil {
return fmt.Errorf("cannot open remote file: %w", err)
}
defer func() {
_ = remoteFile.Close()
}()
localFileName := filepath.Join(localDir, filepath.Base(remoteFilePath))
localFile, err := os.Create(localFileName)
if err != nil {
return fmt.Errorf("cannot create local file: %w", err)
}
defer func() {
_ = localFile.Close()
}()
_, err = io.Copy(localFile, remoteFile)
if err != nil {
return fmt.Errorf("cannot copy remote file content to local file: %w", err)
}
return nil
}
// Delete deletes a file on the remote server
func (fm *fileManagerImpl) Delete(remoteFilePath string) error {
err := fm.client.Remove(remoteFilePath)
if err != nil {
return fmt.Errorf("cannot delete file: %w", err)
}
return nil
}