/
main.go
169 lines (143 loc) · 3.66 KB
/
main.go
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package main
import (
"crypto/rand"
"flag"
"fmt"
"io"
"log"
"os"
"path/filepath"
"time"
"github.com/pkg/errors"
"github.com/pkg/sftp"
"golang.org/x/crypto/ssh"
)
const (
ip = ""
port = ""
username = ""
password = ""
capacity = 1024 * 1024
maxCapacity = 3 * 1024 * 1024 * 1024
)
func main() {
var filePath string
flag.StringVar(&filePath, "path", "", "temp file path")
flag.Parse()
var tempFile *os.File
var err error
if filePath == "" {
tempFile, err = makeTempFile(maxCapacity)
} else {
tempFile, err = os.Open(filePath)
}
if err != nil {
log.Fatalf("fail to init temp file: %v", err)
}
defer func() {
_ = tempFile.Close()
// remove temp file
if err = os.Remove(tempFile.Name()); err != nil {
log.Fatalf("fail to remove temp file: %v", err)
}
}()
// set ssh connection info
sshConfig := &ssh.ClientConfig{
User: username,
Auth: []ssh.AuthMethod{
ssh.Password(password),
},
HostKeyCallback: ssh.InsecureIgnoreHostKey(),
}
// make ssh client
addr := fmt.Sprintf("%s:%s", ip, port)
sshClient, err := ssh.Dial("tcp", addr, sshConfig)
if err != nil {
log.Fatalf("fail to dial: %v", err)
}
defer func() {
if err := sshClient.Close(); err != nil {
log.Printf("fail to close ssh client: %v", err)
}
}()
// make sftp client
sftpClient, err := sftp.NewClient(sshClient)
if err != nil {
log.Fatalf("fail to create SFTP client: %v", err)
}
defer func() {
if err := sftpClient.Close(); err != nil {
log.Printf("fail to close sftp client: %v", err)
}
}()
localFilePath := tempFile.Name()
remoteFilePath := localFilePath
// open local file
localFile, err := os.Open(localFilePath)
if err != nil {
log.Fatalf("fail to open local file: %v", err)
}
defer func() {
if err := localFile.Close(); err != nil {
log.Printf("fail to close %s file: %v", localFilePath, err)
}
}()
localFileContent, err := io.ReadAll(localFile)
if err != nil {
log.Fatalf("fail to read local file: %v", err)
}
// make dir
dir := filepath.Dir(remoteFilePath)
if _, err := sftpClient.Stat(dir); os.IsNotExist(err) {
if err := sftpClient.MkdirAll(dir); err != nil {
log.Fatalf("fail to create remote dir: %v", err)
}
}
// send file
newFile, err := sftpClient.OpenFile(remoteFilePath, os.O_CREATE|os.O_WRONLY|os.O_EXCL)
if err != nil {
log.Fatalf("fail to create remote file: %v", err)
}
defer func() {
if err := newFile.Close(); err != nil {
log.Printf("fail to close %s file: %v", remoteFilePath, err)
}
}()
size, err := newFile.Write(localFileContent)
if err != nil {
log.Fatalf("fail to write to remote file: %v", err)
}
fileSize := getFileSize(tempFile)
log.Printf("temp file size = %d, send file size = %d, is same = %v", fileSize, size, fileSize == size)
}
func makeTempFile(size int64) (tempFile *os.File, err error) {
// make temp file
tempFile, err = os.CreateTemp(".", "temp")
if err != nil {
return nil, errors.Wrap(err, "fail to make temp file")
}
// print temp file path
log.Printf("temp file path: %s", tempFile.Name())
// write to temp file
start := time.Now()
buf := make([]byte, capacity)
for getFileSize(tempFile) < size {
if _, err := rand.Read(buf); err != nil {
return nil, errors.Wrap(err, "fail to make rand content")
}
if _, err = tempFile.Write(buf); err != nil {
return nil, errors.Wrap(err, "fail to write temp file")
}
}
end := time.Since(start)
log.Printf("make temp file: %v", end)
log.Printf("write to temp file %d size", getFileSize(tempFile))
return tempFile, err
}
func getFileSize(file *os.File) int64 {
info, err := os.Stat(file.Name())
if err != nil {
log.Fatalf("fail to get file %s info: %v", file.Name(), err)
}
return info.Size()
}