Zig

Multiple Hop SSH to SFTP

See more SFTP Examples

Demonstrates how to SFTP through an intermediate SSH server (multiple hop). The scheme looks like this:

Application => ServerSSH1 => ServerSFtp

The ConnectThroughSsh method is added in Chilkat version 9.5.0.55 to accomplish this task.

Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

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

    const ssh1 = try chilkat.Ssh.init();
    defer ssh1.deinit();

    // Hostname may be an IP address or domain name:
    const hostname = "192.168.1.111";
    const port = 22;

    // Connect directly to the 1st SSH server:
    ssh1.connect(hostname, port) catch {
        std.debug.print("{s}\n", .{try ssh1.getLastErrorText(alloc)});
        return;
    };

    // Authenticate using login/password:
    ssh1.authenticatePw("myLogin", "myPassword") catch {
        std.debug.print("{s}\n", .{try ssh1.getLastErrorText(alloc)});
        return;
    };

    // Connect through the 1st SSH connection to reach a 2nd SSH server (for SFTP)
    // Note: Any number of connections may be simultaneously tunneled through a single
    // existing SSH connection.
    const sftp = try chilkat.SFtp.init();
    defer sftp.deinit();

    // Connect to some SSH/SFTP server through ssh1.
    sftp.connectThroughSsh(ssh1, "sftp.someremoteserver.com", 22) catch {
        std.debug.print("{s}\n", .{try sftp.getLastErrorText(alloc)});
        return;
    };

    // Authenticate with the SFTP server.
    sftp.authenticatePw("myLogin", "myPassword") catch {
        std.debug.print("{s}\n", .{try sftp.getLastErrorText(alloc)});
        return;
    };

    // After authenticating, the SFTP subsystem must be initialized:
    sftp.initializeSftp() catch {
        std.debug.print("{s}\n", .{try sftp.getLastErrorText(alloc)});
        return;
    };

    // Upload from the local file to the SSH server.
    // Important -- the remote filepath is the 1st argument,
    // the local filepath is the 2nd argument;
    const remote_file_path = "hamlet.xml";
    const local_file_path = "c:/temp/hamlet.xml";

    sftp.uploadFileByName(remote_file_path, local_file_path) catch {
        std.debug.print("{s}\n", .{try sftp.getLastErrorText(alloc)});
        return;
    };

    std.debug.print("Success.\n", .{});

    // Close the connection with the SFTP server.(This closes the the tunnel through ssh1.)
    // The connection with ssh1 is still alive, and may be used for more connections.
    sftp.disconnect();

    // ...
    // ...
    // ...

    ssh1.disconnect();
}