Java

Get a Remote File's Size (32-bit)

Demonstrates the Chilkat SFtp.GetFileSize32 method, which returns a remote file's size in bytes as a 32-bit integer. The arguments are the remote path (or handle), whether symbolic links are followed, and whether the first argument is a handle.

Background: A 32-bit signed integer tops out near 2 GB, so this is fine for ordinary files but will misreport or fail for larger ones. When a file might exceed that, use GetFileSizeStr, which returns the size as a decimal string and cannot overflow. The two boolean arguments are shared by all the attribute getters: the first follows symbolic links to their target, and the second says whether you passed a path or an open handle.

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import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.SFtp;

public class ChilkatExample {

    public static void main(String[] args) {
        // Demonstrates the SFtp.GetFileSize32 method, which returns a remote file's size in bytes as a
        // 32-bit integer.  The 1st argument is the remote path (or handle), the 2nd selects whether
        // symbolic links are followed, and the 3rd indicates whether the 1st argument is a handle.

        SFtp sftp = new SFtp();

        // Connect, authenticate, and initialize the SFTP subsystem.
        int port = 22;
        try {
            sftp.connect("sftp.example.com", port);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Normally you would not hard-code the password in source.  You should instead obtain it
        // from an interactive prompt, environment variable, or a secrets vault.
        String password = "mySshPassword";

        try {
            sftp.authenticatePw("mySshLogin", password);

            sftp.initializeSftp();
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // The 2nd argument (bFollowLinks) selects whether a symbolic link is followed to its target.
        // The 3rd argument (bIsHandle) is false here because the 1st argument is a path, not an
        // open handle.
        boolean bFollowLinks = true;
        boolean bIsHandle = false;

        int fileSize = sftp.getFileSize32("subdir/report.pdf", bFollowLinks, bIsHandle);
        if (fileSize < 0) {
            System.out.println(sftp.getLastErrorText());
            return;
        }

        System.out.println("File size: " + fileSize + " bytes");

        // Note: For files that may exceed 2 GB, use GetFileSizeStr (returns a decimal string) instead,
        // because the value can overflow a 32-bit integer.

        sftp.disconnect();
    }
}