iOS: File upload with SFTP

• Swift 5
• Xcode Version 12.3
• NMSSH

In iOS application development, it was a specification to upload a file to the server by SFTP. The library used this time is NMSSH. Other than this, I could not find it.

• https://github.com/NMSSH/NMSSH

Installing CocoaPod

First of all, I stumbled here. See) https://qiita.com/spring_i/items/181bc3c05142d1f80d93

$ sudo gem install -v1.8.4 cocoapods -n /usr/local/bin
$ pod setup

Install MNSSH

The Xcode project is already created.

$ cd [Project name]
$ pod init

A Podfile will be generated, so edit it.

Podfile

# Uncomment the next line to define a global platform for your project
# platform :ios, '9.0'

target 'SampleProject' do
  # Comment the next line if you're not using Swift and don't want to use dynamic frameworks
  use_frameworks!

  # Pods for GSApp
  pod 'NMSSH'
end

Install command

$ pod install

Library import

Start the project by double-clicking the generated ** [project name] .xcworkspace **.

Library import in the target file

ViewController.swift

imprt NMSSH

Create dummy file to upload

Creating a dummy file for uploading

ViewController.swift

        do {
            let fileManager = FileManager.default
            let doc = try fileManager.url(for: .documentDirectory,
                                          in: .userDomainMask,
                                          appropriateFor: nil, create: false)
            let path = doc.appendingPathComponent("muyFile.txt")
            let data = "Hello, world".data(using: .utf8)
            fileManager.createFile(atPath: path.path, contents: data, attributes: nil)
        } catch {
            print(error)
        }

upload

ViewController.swift

            let host = "[IP address]"
            let username = "[username]"
            let password = "[password]"
            let remotePath = "[Destination file path]"
            let session = NMSSHSession.connect(toHost: host, withUsername: username)
            if (session.isConnected) {
                session.authenticate(byPassword: password)
                if (session.isAuthorized) {
                    session.channel.uploadFile(path.path, to: remotePath)
                }
            }
            session.disconnect()

Sample source code

I'm connecting onClick with a button.

ViewController.swift

//
//  ViewController.swift
//  SampleProject
//
//  Created by SankoSC on 2020/12/21.
//

import UIKit
import NMSSH

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
    }

    @IBAction func onClick(_ sender: Any) {
        sftp()
    }
        
    func sftp() {
        do {
            let fileManager = FileManager.default
            let doc = try fileManager.url(for: .documentDirectory,
                                          in: .userDomainMask,
                                          appropriateFor: nil, create: false)
            let path = doc.appendingPathComponent("muyFile.txt")
            let data = "Hello, world".data(using: .utf8)
            fileManager.createFile(atPath: path.path, contents: data, attributes: nil)
        
            let host = "[IP address]"
            let username = "[username]"
            let password = "[password]"
            let remotePath = "[Destination file path]"
            let session = NMSSHSession.connect(toHost: host, withUsername: username)
            if (session.isConnected) {
                session.authenticate(byPassword: password)
                if (session.isAuthorized) {
                    session.channel.uploadFile(path.path, to: remotePath)
                }
            }
            session.disconnect()
        } catch {
            print(error)
        }
    }
}