Dart

Check if File Exists

See more SFTP Examples

Demonstrates how to check to see if a file exists. 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();

  // Connect to the SSH server.  
  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;
  }

  // Check to see if a file exists

  // The return value is one of the following values:
  // -1: Unable to check. Examine the LastErrorText to determine the reason for failure.
  // 0: File does not exist.
  // 1: The regular file exists.
  // 2: It exists, but it is a directory.
  // 3: It exists, but it is a symlink (only possible if followLinks is false)
  // 4: It exists, but it is a special filesystem entry type.
  // 5: It exists, but it is an unkown filesystem entry type.
  // 6: It exists, but it is an socket filesystem entry type.
  // 7: It exists, but it is an char device entry type.
  // 8: It exists, but it is an block device entry type.
  // 9: It exists, but it is an FIFO entry type.

  final followLinks = true;
  final status = sftp.fileExists('someDir/someFile.txt', followLinks);
  if (status < 0) {
    print(sftp.lastErrorText);
    return;
  }

  print('status = $status');

  print('Success');
}