How to know if it failed?

[Jeremy Darling]

Given a bad connection string there doesn't seem to be any feedback that Sequest has failed. Is there a way to tell what went wrong and where? I read the readme, but don't see it in there.

EG 1:

var sequest = require('sequest');

var seq = sequest('nouser@invalidhost');

seq.pipe(process.stdout); // only necessary if you want to see the output in your terminal
seq.write('ls -la');
seq.write('touch testfile');
seq.write('ls -la');
seq.end();

EG 2:

var sequest = require('sequest');

var seq = sequest('root@127.0.0.1');

seq.pipe(process.stdout); // only necessary if you want to see the output in your terminal
seq.write('ls -la');
seq.write('invalidcommand testfile');
seq.write('ls -la');
seq.end();

Seems there should be an error callback someplace that returns the error type (connection refused, invalid login, bad command) and the details.

[Jarrett Cruger]

@jdarling when its used as a stream, you can listen to the on('error') event to catch any of those cases. Otherwise the error is captured and sent to the callback when using it with the other interface.

[Jeremy Darling]

By chance can you post an example of that? I'm actually looking at streaming this back into a web socket for remote access.

[Jarrett Cruger]

@jdarling no different from the example you gave except make sure to tack on

seq.on('error', function (err) {
  //handle me
});

And then you would just swap process.stdout for your websocket writeable stream which you can get with primus or websocket-stream

[Jeremy Darling]

I think I finally found my typo. I was trying to use the "Continuous Mode" code as is and it never did anything. Looked at the test cases though and noticed that I needed to basically get the object back from the connection. Below code works:

// Require sequest so we can use it
var sequest = require('sequest');

// Setup the host to connect to
var host = 'root@127.0.0.1';

// Create the connection
var conn = sequest.connect(host);

// Get the sequest object back for streaming and error handling
var seq = conn();

// Pipe output to the terminal, substitute for whatever stream you want
// or remove completely if you don't need it
seq.pipe(process.stdout);

seq.on('error', function (err) {
  // Error handler goes here
  throw err;
});

// Do some stuff
seq.write('ls -la');
seq.write('invalidcommand testfile');
seq.write('ls -la');

// All done
seq.end();

This code didn't work:

// Require sequest so we can use it
var sequest = require('sequest');

// Setup the host to connect to
var host = 'root@127.0.0.1';

// Create the connection and get the sequest object back
var seq = sequest(host);

// Pipe output to the terminal, substitute for whatever stream you want
// or remove completely if you don't need it
seq.pipe(process.stdout);

seq.on('error', function (err) {
  // Error handler goes here
  throw err;
});

// Do some stuff
seq.write('ls -la');
seq.write('invalidcommand testfile');
seq.write('ls -la');

// All done
seq.end();

Just posting in case someone else hits the same mis-understanding :). Close this if you would like. I think you should add something like the above to the documentation though. But, if the 2nd one should have worked, it didn't.

I'm on Windows connecting to a Linux host.

Oh, and thanks for your prompt replies. Must faster than I manage to be with mine :)

[Martín Acosta]

thanks @jdarling !! i have the same problem, now is working!!