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(Node.js) Co:Z SFTP Binary File Download (from z/OS IBM Mainframe)

Demonstrates how to download a binary file, such as a .zip, from a Co:Z SFTP server on a z/OS IBM Mainframe.

Note: This requires Chilkat v9.5.0.76 or greater.

Install Chilkat for Node.js and Electron using npm at

Chilkat npm packages for Node.js

Chilkat npm packages for Electron

on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

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

    var sftp = new chilkat.SFtp();

    // Connect to the SSH server.  
    var hostname = "sftp.example.com";
    var port = 22;
    var success = sftp.Connect(hostname,port);
    if (success !== true) {
        console.log(sftp.LastErrorText);
        return;
    }

    success = sftp.AuthenticatePw("myLogin","myPassword");
    if (success !== true) {
        console.log(sftp.LastErrorText);
        return;
    }

    success = sftp.InitializeSftp();
    if (success !== true) {
        console.log(sftp.LastErrorText);
        return;
    }

    // To download a binary file from the Co:Z SFTP server, 
    // we must switch to binary mode in the following unconventional way.
    // We pretend to fetch a directory listing for "/+mode=binary"
    // This has the effect of putting the server in binary mode for transfers.
    var handle = sftp.OpenDir("/+mode=binary");
    if (sftp.LastMethodSuccess !== true) {
        console.log(sftp.LastErrorText);
        return;
    }

    // Download the "directory listing" (but it's not actually a directory listing, and we'll just discard it.)
    // dirListing: SFtpDir
    var dirListing = sftp.ReadDir(handle);
    if (sftp.LastMethodSuccess !== true) {
        console.log(sftp.LastErrorText);
        return;
    }

    // Close the directory handle:
    success = sftp.CloseHandle(handle);
    if (success !== true) {
        console.log(sftp.LastErrorText);
        return;
    }

    // Download the binary file:
    var localFilePath = "c:/temp/test.zip";
    var remoteFilePath = "test.zip";
    success = sftp.DownloadFileByName(remoteFilePath,localFilePath);
    if (success !== true) {
        console.log(sftp.LastErrorText);
        return;
    }

    console.log("Success.");

}

chilkatExample();

 

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