how I cand handle errors when adding torrents to a client?

[rafaelleru]

I tryed client.add(t, function(err, torrent){manage error if it happens here}) but didn't work.

[alxhotel]

I believe you can do something like this:

client.on('error', function (err) {
  // Handle error
})
client.on('warning', function (err) {
  // Handle warning
})

[rafaelleru]

Yes but I want to manage the duplicated torrent and invalid torrent identifier when adding a torrent.
So I need to get the errors in the callback client.add(torrent, callback(err, torrent))

[DiegoRBaquero]

@rafaelleru You need to use the error event of the client.

The onTorrent callback function of client.add is not an error-first callback function.

[feross]

You can also listen for the 'error' event on the torrent object, which is more specific than the client 'error' event.

torrent.on('error', function (err) {})

From the docs:

Note: Torrent errors are emitted at torrent.on('error'). If there are no 'error' event handlers on the torrent instance, then the error will be emitted at client.on('error'). This prevents throwing an uncaught exception (unhandled 'error' event), but it makes it impossible to distinguish client errors versus torrent errors. Torrent errors are not fatal, and the client is still usable afterwards. Therefore, always listen for errors in both places (client.on('error') and torrent.on('error')).