AndroidデバイスにFTPサーバを建立する

2025/2/12 CA.aab #5の登壇資料です

Transcript

1. Android FTP 立 Yoshihiro Wada / @e10dokup 2025/2/12 @ CA.aab #5
2. { “id”: “@e10dokup”, “name”: “Yoshihiro Wada”, “affiliations”: [ “CyberAgent Inc, / Ameba” ], “interested”: [ “camera”, “gadget”, “driving”, “motorsports” ] }
3. Android FTP 車 立 一 見 行 手 Foreground Service Android Developers FTP 日 3
4. Android FTP 立 見 Yoshihiro Wada / @e10dokup 2025/2/12 @ CA.aab #5
5. 大 FTP
6. FTP File Transfer Protocol HTTP FTP FTP FTP RFC 959 FTP 6
7. FTP FTP Cyberduck - FTP ftp:// URL 立 FTP 7
8. FTP Android
9. Q: Android FTP FTP FTP Play 9
10. 10 Sony Transfer & Tagging Add-on 用
11. Android FTP 立 Q: Android FTP A: 見 11
12. FTP 方 方 FTP 方 12
13. FTP 方 方 FTP 方 13
14. Sony Transfer & Tagging add-on OSS 示 The Apache FtpServer Android FTP ppareit/swiftp 見 1 FTP FTP 方 14
15. 大 15 Ҿ༻:https://github.com/ppareit/swiftp/tree/master/app/src/main/java/be/ppareit/swiftp/server
16. Sony Transfer & Tagging add-on OSS 示 The Apache FtpServer Android FTP ppareit/swiftp 見 1 FTP FTP 方 16
17. Javadoc 17 Ҿ༻:https://mina.apache.org/ftpserver-project/index.html
18. FTP 方 方 FTP 方 18
19. Android 自身 IP DNS Android API 自 Android Developers Network FTP 19
20. 20 Ҿ༻:https://developer.android.com/develop/connectivity/network-ops/reading-network-state ConnectivityManager
21. FTP 方 方 FTP 方 21
22. FTP 長 Service 22 Ҿ༻:https://developer.android.com/develop/background-work/services
23. 23 Ҿ༻:https://developer.android.com/develop/background-work/services#Types-of-services
24. 行 行 用 Foreground Service 24 Ҿ༻:https://developer.android.com/develop/background-work/services/fgs
26. Jetpack Compose IP ConnectivityManager IP 用 UI 26 private fun getCurrentIpAddress(): String { val connectivityManager = getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager val currentNetwork = connectivityManager.activeNetwork val linkProperties = connectivityManager.getLinkProperties(currentNetwork) return linkProperties?.linkAddresses?.first { it.address is Inet4Address }.toString() }
27. 曰 LinkProperties IP Android API 行 linkProperties 見 27 Ҿ༻: https://developer.android.com/develop/connectivity/network-ops/reading-network-state https://developer.android.com/reference/android/net/LinkProperties#getLinkAddresses()
28. 行 Foreground Service 用 Service 用 Foreground Foreground Service 行 28
29. 行 Foreground Service 用 Service 用 Foreground Foreground Service 行 29
30. Activity 用 override Service 用 30 class FtpService : Service() { override fun onBind(intent: Intent?): IBinder? { return null } override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int { // ࣮ࡍʹαʔϏεʹ͍ͤͨ͞ॲཧΛ͜͜ʹهड़͢Δ return START_STICKY } override fun onDestroy() { super.onDestroy() } }
31. 行 Foreground Service 用 Service 用 Foreground Foreground Service 行 31
32. Service Activity Manifest 見 Foreground Service 言 32 Ҿ༻:https://developer.android.com/develop/background-work/services/fgs/declare#declare-fgs
33. foregroundServiceType Android 14 API 34 Foreground Service 33 Ҿ༻:https://developer.android.com/develop/background-work/services/fgs/service-types
34. foregroundServiceType Android 14 API 34 色 Data sync Foreground Service 34 Ҿ༻:https://developer.android.com/develop/background-work/services/fgs/service-types#data-sync
35. 見 Android Manifest Manifest Foreground Service 言 35 <!-- ݖݶͷ௥Ճ --> <uses-permission android:name="android.permission.FOREGROUND_SERVICE" /> <uses-permission android:name="android.permission.FOREGROUND_SERVICE_DATA_SYNC"/> <application …> <!-- Foreground Serviceͷએݴ --> <service android:name=".service.FtpService" android:enabled="true" android:exported="false" android:foregroundServiceType=“dataSync"/> … </application>
36. 行 Foreground Service 用 Service 用 Foreground Foreground Service 行 36
37. Service onStartCommand 行 用 ServiceCompat.startForeground 行 用 Foreground Service 37 Ҿ༻:https://developer.android.com/develop/background-work/services/fgs/launch#promote-service
38. Foreground Service 用 Foreground Service 38 try { ServiceCompat.startForeground( this, ID_FOREGROUND_SERVICE_FTP, createNotification(), // ௨஌Λ࡞Δؔ਺ʢ࣍ϖʔδʣ if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) { ServiceInfo.FOREGROUND_SERVICE_TYPE_DATA_SYNC } else { 0 } // ManifestͰએݴͨ͠Foreground Service TypeΛ౰ͯࠐΉ ) // TODO: Foregroundʹग़དྷͨΒ͜͜ͰFTPαʔόΛ࣮ߦ͍ͨ͠ } catch (e: Exception) { Timber.e(e, "Failed to launch foreground service”) }
39. 用 Foreground Service 39 private fun createNotification(): Notification { val channel = NotificationChannel( NOTIFICATION_CHANNEL_ID, NOTIFICATION_CHANNEL_NAME, NotificationManager.IMPORTANCE_DEFAULT ) val notificationManager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager notificationManager.createNotificationChannel(channel) // ௨஌νϟωϧͷઃఆ val notification = NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID).apply { setContentTitle("FTP Server") setContentText("FTP Server established") setSmallIcon(R.drawable.notification_icon) }.build() // ࣮ࡍͷ௨஌ͷੜ੒ return notification }
40. Activity ForegroundService 行 行 Foreground Service 40 private fun launchFtpService() { val intent = Intent(this, FtpService::class.java) startForegroundService(intent) }
41. Apache FTP Server 見 立 方 FTP 方 Foreground Service FTP 行 41
42. 方 FTP 立 方 42 Ҿ༻:https://mina.apache.org/ftpserver-project/embedding_ftpserver.html
43. PropertiesUserManager 人 FTPS 方 43 Ҿ༻:https://mina.apache.org/ftpserver-project/embedding_ftpserver.html
44. Listener UserManager 行 FTP 44 private fun startFtpServer() { // Apache FTP ServerͷϑΝΫτϦ val serverFactory = FtpServerFactory() // ϙʔτͳͲΛࢦఆ͢ΔListenerΛ࡞Δ val ftpListener = createFtpListener() // Ϣʔβ໊ɺύεϫʔυΛ؅ཧ͢ΔUserManagerΛ࡞Δ val userManager = createUserManager() // ࡞ͬͨListenerɺUserManagerΛࢦఆ͠ɺFTPαʔόΛ࣮ࡍʹ࡞੒͠ɺ࣮ߦ͢Δ serverFactory.addListener("default", ftpListener) serverFactory.userManager = userManager ftpServer = serverFactory.createServer() ftpServer?.start() }
45. Listener UserManager 行 FTP 45 private fun startFtpServer() { // Apache FTP ServerͷϑΝΫτϦ val serverFactory = FtpServerFactory() // ϙʔτͳͲΛࢦఆ͢ΔListenerΛ࡞Δ val ftpListener = createFtpListener() // Ϣʔβ໊ɺύεϫʔυΛ؅ཧ͢ΔUserManagerΛ࡞Δ val userManager = createUserManager() // ࡞ͬͨListenerɺUserManagerΛࢦఆ͠ɺFTPαʔόΛ࣮ࡍʹ࡞੒͠ɺ࣮ߦ͢Δ serverFactory.addListener("default", ftpListener) serverFactory.userManager = userManager ftpServer = serverFactory.createServer() ftpServer?.start() }
46. FTP Listener 自 Listener 46 private fun createFtpListener(): Listener { val listenerFactory = ListenerFactory() // ࣮ࡍʹ͸Ҿ਺Λड͚औͬͯࢦఆ͢Δͱྑͦ͞͏ listenerFactory.port = <ϙʔτ൪߸> return listenerFactory.createListener() }
47. Listener UserManager 行 FTP 47 private fun startFtpServer() { // Apache FTP ServerͷϑΝΫτϦ val serverFactory = FtpServerFactory() // ϙʔτͳͲΛࢦఆ͢ΔListenerΛ࡞Δ val ftpListener = createFtpListener() // Ϣʔβ໊ɺύεϫʔυΛ؅ཧ͢ΔUserManagerΛ࡞Δ val userManager = createUserManager() // ࡞ͬͨListenerɺUserManagerΛࢦఆ͠ɺFTPαʔόΛ࣮ࡍʹ࡞੒͠ɺ࣮ߦ͢Δ serverFactory.addListener("default", ftpListener) serverFactory.userManager = userManager ftpServer = serverFactory.createServer() ftpServer?.start() }
48. UserManager 48 private fun createUserManager(): UserManager { val userManagerFactory = PropertiesUserManagerFactory() // Ϣʔβ৘ใΛอ؅͢ΔϑΝΠϧͷ࡞੒ val profileFile = File(getExternalFilesDir(null)?.path + "/users.property") if (!profileFile.exists()) { profileFile.createNewFile() } userManagerFactory.file = profileFile userManagerFactory.passwordEncryptor = SaltedPasswordEncryptor() // Ϣʔβ໊ɺύεϫʔυɺݖݶͳͲͷઃఆ val baseUser = BaseUser() baseUser.name = <Ϣʔβ໊> baseUser.password = <ύεϫʔυ> baseUser.homeDirectory = getExternalFilesDir(Environment.DIRECTORY_DCIM)?.path baseUser.authorities = listOf(WritePermission()) val userManager = userManagerFactory.createUserManager() userManager.save(baseUser) return userManager }
49. Listener UserManager 行 FTP 49 private fun startFtpServer() { // Apache FTP ServerͷϑΝΫτϦ val serverFactory = FtpServerFactory() // ϙʔτͳͲΛࢦఆ͢ΔListenerΛ࡞Δ val ftpListener = createFtpListener() // Ϣʔβ໊ɺύεϫʔυΛ؅ཧ͢ΔUserManagerΛ࡞Δ val userManager = createUserManager() // ࡞ͬͨListenerɺUserManagerΛࢦఆ͠ɺFTPαʔόΛ࣮ࡍʹ࡞੒͠ɺ࣮ߦ͢Δ serverFactory.addListener("default", ftpListener) serverFactory.userManager = userManager ftpServer = serverFactory.createServer() ftpServer?.start() }
50. Foreground Service 行 行 50 try { ServiceCompat.startForeground( this, ID_FOREGROUND_SERVICE_FTP, createNotification(), // ௨஌Λ࡞Δؔ਺ʢ࣍ϖʔδʣ if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) { ServiceInfo.FOREGROUND_SERVICE_TYPE_DATA_SYNC } else { 0 } // ManifestͰએݴͨ͠Foreground Service TypeΛ౰ͯࠐΉ ) // FTPαʔόͷ࣮ߦ startFtpServer() } catch (e: Exception) { Timber.e(e, "Failed to launch foreground service”) } Cyberduck Android FTP 子
51. Android FTP 立 子 走 FTP 自 大 Android Developers 大 GitHub OSS 51