Sample SFTP connection in Go

sample_sftp.go

package main

import (
	"fmt"
	"os"

	"github.com/pkg/sftp"
	"golang.org/x/crypto/ssh"
)

func main() {
	host := "127.0.0.1"
	username := "foobar"
	password := "secret"
	port := ":22" // Make sure there is colon ":" prefix

	config := &ssh.ClientConfig{
		User: username,
		Auth: []ssh.AuthMethod{
			ssh.Password(password),
		},
		// `InsecureIgnoreHostKey` is not recommended. Consider other more secured method for verifying host key
		HostKeyCallback: ssh.InsecureIgnoreHostKey(),
	}

	// Establishing connection
	conn, err := ssh.Dial("tcp", host+port, config)
	if err != nil {
		fmt.Fprintf(os.Stderr, "Failed to dial: %v\n", err)
		os.Exit(1)
	}

	// `client` is the handler for performing operations on SFTP server
	client, err := sftp.NewClient(conn)
	if err != nil {
		fmt.Fprintf(os.Stderr, "Failed to create client: %v\n", err)
		os.Exit(1)
	}

	// Example for checking available storage space
	statVF, err := client.StatVFS("/")
	if err != nil {
		fmt.Fprintf(os.Stderr, "Fail to get filesystem info: %v\n", err)
		os.Exit(1)
	}
	fmt.Printf("Space available: %d bytes\n", statVF.FreeSpace())
}