Question

I’m developing for Spotify (JavaScript) on an OSX machine and the application crashes when I’m trying to play a song.

The call I make to the API is: player.play(trackURI);

What happens is that the Spotify client will play for about 1/4th of a second the song, then it will crash. I do believe it is this method that crashes the client as I have debugged it to this point.

If you need any other info, and have any clue about why this could happen, I’m looking forward to a reply.

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More information:

So, I’ve managed to replicate it. What happens is that I have registered for the EVENT_CHANGE event like so player.observe(models.EVENT.CHANGE, function (e) {

When the song ends and a new one starts, I want to play the next song in my fake queue. Therefore, I call player.play(nextSongId) when the EVENT.CHANGE is triggered with e.data.curtrack == true.

Then I guess Spotify tries to play the next song in its queue, but then I want to play my own next song, so Spotify crashes.

Answer 1

After some fixing up, I think this happens because I was calling player.play(trackURI) almost immediately after I had called it once before. This happened because I was changing a song, which triggered the EVENT.CHANGE event, and then I would again call player.play() again. See the piece of code for a good way to deal with song changes.

player.observe(models.EVENT.CHANGE, function (e) {

    // Only update the page if the track changed
    if (e.data.curtrack == true && !justChangedSong) {
        var songId = queue.shift();
        if (songId != null)
        {
            player.play(songId);
            justChangedSong = true;
        }
    }
    else if (justChangedSong)
    {
        justChangedSong = false;
    }
});

Also, if you have a button called “Next song” or so, connect it to the playNextSong() method:

function playNextSong()
{
    var songId = queue.shift();
    if (songId != null)
    {
        player.play(songId);
        justChangedSong = true;
    }
}

Seems like Spotify is not crashing anymore. Cheers!