go语言实现sftp包上传文件和文件夹到远程服务器操作

使用go语言的第三方包：github.com/pkg/sftp和golang.org/x/crypto/ssh实现文件和文件夹传输。

1、创建connect方法：

func connect(user, password, host string, port int) (*sftp.Client, error) {
var (
 auth   []ssh.AuthMethod
 addr   string
 clientConfig *ssh.ClientConfig
 sshClient *ssh.Client
 sftpClient *sftp.Client
 err   error
)
// get auth method
auth = make([]ssh.AuthMethod, 0)
auth = append(auth, ssh.Password(password))
clientConfig = &ssh.ClientConfig{
 User:   user,
 Auth:   auth,
 Timeout:   30 * time.Second,
 HostKeyCallback: ssh.InsecureIgnoreHostKey(), //ssh.FixedHostKey(hostKey),
}
// connet to ssh
addr = fmt.Sprintf("％s:％d", host, port)
if sshClient, err = ssh.Dial("tcp", addr, clientConfig); err != nil {
 return nil, err
}
// create sftp client
if sftpClient, err = sftp.NewClient(sshClient); err != nil {
 return nil, err
}
return sftpClient, nil
}

2、上传文件

func uploadFile(sftpClient *sftp.Client, localFilePath string, remotePath string) {
srcFile, err := os.Open(localFilePath)
if err != nil {
 fmt.Println("os.Open error : ", localFilePath)
 log.Fatal(err)
}
defer srcFile.Close()
var remoteFileName = path.Base(localFilePath)
dstFile, err := sftpClient.Create(path.Join(remotePath, remoteFileName))
if err != nil {
 fmt.Println("sftpClient.Create error : ", path.Join(remotePath, remoteFileName))
 log.Fatal(err)
}
defer dstFile.Close()
ff, err := ioutil.ReadAll(srcFile)
if err != nil {
 fmt.Println("ReadAll error : ", localFilePath)
 log.Fatal(err)
}
dstFile.Write(ff)
fmt.Println(localFilePath + " copy file to remote server finished!")
}

3、上传文件夹

func uploadDirectory(sftpClient *sftp.Client, localPath string, remotePath string) {
localFiles, err := ioutil.ReadDir(localPath)
if err != nil {
 log.Fatal("read dir list fail ", err)
}
for _, backupDir := range localFiles {
 localFilePath := path.Join(localPath, backupDir.Name())
 remoteFilePath := path.Join(remotePath, backupDir.Name())
 if backupDir.IsDir() {
  sftpClient.Mkdir(remoteFilePath)
  uploadDirectory(sftpClient, localFilePath, remoteFilePath)
 } else {
  uploadFile(sftpClient, path.Join(localPath, backupDir.Name()), remotePath)
 }
}
fmt.Println(localPath + " copy directory to remote server finished!")
}

4、上传测试

func DoBackup(host string, port int, userName string, password string, localPath string, remotePath string) {
var (
 err  error
 sftpClient *sftp.Client
)
start := time.Now()
sftpClient, err = connect(userName, password, host, port)
if err != nil {
 log.Fatal(err)
}
defer sftpClient.Close()
_, errStat := sftpClient.Stat(remotePath)
if errStat != nil {
 log.Fatal(remotePath + " remote path not exists!")
}
backupDirs, err := ioutil.ReadDir(localPath)
if err != nil {
 log.Fatal(localPath + " local path not exists!")
}
uploadDirectory(sftpClient, localPath, remotePath)
elapsed := time.Since(start)
fmt.Println("elapsed time : ", elapsed)
}

补充：go实现ssh远程机器并传输文件

核心依赖包：

golang.org/x/crypto/ssh

github.com/pkg/sftp

其中golang.org/x/crypto/ssh 可从github上下载，

下载地址：https://github.com/golang/crypto

ssh连接源码（这里是根据秘钥连接）:

var keypath = "key/id_rsa"
//获取秘钥
func publicKey(path string) ssh.AuthMethod {
keypath, err := homedir.Expand(path)
if err != nil {
fmt.Println("获取秘钥路径失败", err)
}
key, err1 := ioutil.ReadFile(keypath)
if err1 != nil {
fmt.Println("读取秘钥失败", err1)
}
signer, err2 := ssh.ParsePrivateKey(key)
if err2 != nil {
fmt.Println("ssh 秘钥签名失败", err2)
}
return ssh.PublicKeys(signer)
}
//获取ssh连接
func GetSSHConect(ip, user string, port int) (*ssh.Client) {
con := &ssh.ClientConfig{
User: user,
Auth: []ssh.AuthMethod{publicKey(keypath)},
HostKeyCallback: func(hostname string, remote net.Addr, key ssh.PublicKey) error {
return nil
},
}
addr := fmt.Sprintf("％s:％d", ip, port)
client, err := ssh.Dial("tcp", addr, con)
if err != nil {
fmt.Println("Dail failed: ", err)
panic(err)
}
return client
}
// 远程执行脚本
func Exec_Task(ip, user, localpath, remotepath string) int {
port := 22
client := GetSSHConect(ip, user, port)
UploadFile(ip, user, localpath, remotepath, port)
session, err := client.NewSession()
if err != nil {
fmt.Println("创建会话失败", err)
panic(err)
}
defer session.Close()
remoteFileName := path.Base(localpath)
dstFile := path.Join(remotepath, remoteFileName)
err1 := session.Run(fmt.Sprintf("/usr/bin/sh ％s", dstFile))
if err1 != nil {
fmt.Println("远程执行脚本失败", err1)
return 2
} else {
fmt.Println("远程执行脚本成功")
return 1
}
}

文件传输功能：

//获取ftp连接
func getftpclient(client *ssh.Client) (*sftp.Client) {
ftpclient, err := sftp.NewClient(client)
if err != nil {
fmt.Println("创建ftp客户端失败", err)
panic(err)
}
return ftpclient
}
//上传文件
func UploadFile(ip, user, localpath, remotepath string, port int) {
client := GetSSHConect(ip, user, port)
ftpclient := getftpclient(client)
defer ftpclient.Close()
remoteFileName := path.Base(localpath)
fmt.Println(localpath, remoteFileName)
srcFile, err := os.Open(localpath)
if err != nil {
fmt.Println("打开文件失败", err)
panic(err)
}
defer srcFile.Close()
dstFile, e := ftpclient.Create(path.Join(remotepath, remoteFileName))
if e != nil {
fmt.Println("创建文件失败", e)
panic(e)
}
defer dstFile.Close()
buffer := make([]byte, 1024)
for {
n, err := srcFile.Read(buffer)
if err != nil {
if err == io.EOF {
fmt.Println("已读取到文件末尾")
break
} else {
fmt.Println("读取文件出错", err)
panic(err)
}
}
dstFile.Write(buffer[:n])
//注意，由于文件大小不定，不可直接使用buffer，否则会在文件末尾重复写入，以填充1024的整数倍
}
fmt.Println("文件上传成功")
}
//文件下载
func DownLoad(ip, user, localpath, remotepath string, port int) {
client := GetSSHConect(ip, user, port)
ftpClient := getftpclient(client)
defer ftpClient.Close()
srcFile, err := ftpClient.Open(remotepath)
if err != nil {
fmt.Println("文件读取失败", err)
panic(err)
}
defer srcFile.Close()
localFilename := path.Base(remotepath)
dstFile, e := os.Create(path.Join(localpath, localFilename))
if e != nil {
fmt.Println("文件创建失败", e)
panic(e)
}
defer dstFile.Close()
if _, err1 := srcFile.WriteTo(dstFile); err1 != nil {
fmt.Println("文件写入失败", err1)
panic(err1)
}
fmt.Println("文件下载成功")
}

以上为个人经验，希望能给大家一个参考，也希望大家多多支持asp之家。如有错误或未考虑完全的地方，望不吝赐教。

来源：https://blog.csdn.net/fu_qin/article/details/78741854