CODEWITHSUNDEEP
node.jssftp
Fabio Ricci
Fabio Ricci

Reputation: 387

SFTP modules in Node to download and delete files

my task is (or better, should be) simple: to fetch the content of a directory in SFTP from a Node application, then download all the files in there and finally delete them remotely.

Now, I've checked different modules. Very clean, in my opinion, is ssh2-sftp-client. I can use it like this:

let Client = require('ssh2-sftp-client');
let sftp = new Client();

sftp.connect({
    host: myhost,
    port: '22',
    username: myusername,
    password: mypassword
}).then(() => {
    return sftp.list('/path/to/my/files');
}).then((data) => {

    for(var i = 0 ; i < data.length; i++) {
        sftp.get('/path/to/my/files/'+data[i].name); 
        }   
}).catch((err) => {
    console.log(err, 'catch error');
});

I can list all files and see the resulting jSon in console, but the .get command seems to do nothing and I have no idea what is wrong. From the documentation (https://www.npmjs.com/package/ssh2-sftp-client) you can get files simply like I'm doing. But:

1) it doesn't seem to work 2) how can I debug what's going on? 3) if I have no chance to choose the local directory, will these files most probably be downloaded where the js is launched by node, right?

So, how could I get the files actually downloaded and possibly deleted remotely if they were successfully downloaded with this module (or others if any)?

Thanks, Fabio

Upvotes: 3

Views: 12826

Answers (4)

Suhail Ahmed
Suhail Ahmed

Reputation: 360

Download and save file using get() method 

sftp.get(remote_file_path, local_file_path).then((stream) => {
    console.log('File download Success')
});

It requires two param: src and dest file path

Upvotes: 0

ZabdiAG
ZabdiAG

Reputation: 155

sftp.get(remoteFileNameWithPath, true).then(stream => {
  stream.pipe(fs.createWriteStream(localFilePath)).on('close', () => console.log('completely passed file'))
})

the get method returns a promise with a stream result, so, In order to save this you need to pipe to a writeStream Check docs on nodejs: https://nodejs.org/api/stream.html

Upvotes: 1

zenbakiak
zenbakiak

Reputation: 1

I'm not sure what happens but when I ran a code like this it only download one file.

for (var i = fileList.length - 1; i >= 0; i--) {

  remoteFilename = process.env.FTP_DEFAULT_DIR + '/' + fileList[i].name
  localFilename = fileList[i].name

  sftp.get(remoteFilename).then((stream) => {
    stream.pipe(fs.createWriteStream(localFilename));
    console.log(stream);
    console.log('processing: ', remoteFilename);
  }).catch((err)=> {
    console.log(err)
  });
}

Upvotes: -1

mscdex
mscdex

Reputation: 106698

sftp.get() returns a Promise that returns a stream, so if you want to save the stream to disk, you will need to pipe it. For example:

var fs = require('fs');

// ...

for(var i = 0; i < data.length; i++) {
  const remoteFilename = '/path/to/remote/files/' + data[i].name;
  const localFilename = '/path/to/local/files/' + data[i].name;
  sftp.get(remoteFilename).then((stream) => {
    stream.pipe(fs.createWriteStream(localFilename));
  });
}

Also, it appears that ssh2-sftp-client is not using the latest version branch of the ssh2 module (v0.5.x as of this writing), so keep that in mind if you run into issues.

Upvotes: 4

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