Dart

SFTP Upload from Local Filesystem

See more SFTP Examples

Demonstrates how to upload a file to an SSH server. There are no limitations on file size, and the file is streamed directly from the local filesystem. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // This example assumes the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  final sftp = CkSFtp();

  // Set some timeouts, in milliseconds:
  sftp.connectTimeoutMs = 5000;
  sftp.idleTimeoutMs = 10000;

  // Connect to the SSH server.  
  // The standard SSH port = 22
  // The hostname may be a hostname or IP address.
  final hostname = 'sftp.example.com';
  final port = 22;
  try {
    sftp.connect(hostname, port);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Authenticate with the SSH server.  Chilkat SFTP supports
  // both password-based authenication as well as public-key
  // authentication.  This example uses password authenication.
  try {
    sftp.authenticatePw('myLogin', 'myPassword');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // After authenticating, the SFTP subsystem must be initialized:
  try {
    sftp.initializeSftp();
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Open a file for writing on the SSH server.
  // If the file already exists, it is overwritten.
  // (Specify "createNew" instead of "createTruncate" to
  // prevent overwriting existing files.)
  final String handle;
  try {
    handle = sftp.openFile('hamlet.xml', 'writeOnly', 'createTruncate');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Upload from the local file to the SSH server.
  try {
    sftp.uploadFile(handle, 'c:/temp/hamlet.xml');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // -----------------------------------------------------------------------------
  // This is important.  You must close the handle on the server.
  // Otherwise open handles will accumulate on the server until eventually a limit
  // is reached and the server will fail on a call to OpenFile.
  // -----------------------------------------------------------------------------

  // Close the file.
  try {
    sftp.closeHandle(handle);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Success.');
}