Skipper is not capable of that. At least I cannot find any proof in the documentation: https://github.com/balderdashy/skipper
Since sails@0.11.0 there is support for socket.io v1.2.1 which has support for binary data transfer:
http://socket.io/blog/introducing-socket-io-1-0/#binary-support
You want to transfer data from client to server. However most example you find is the other way round, e.g. https://stackoverflow.com/a/24124966/401025:
Server sends image to client:
require('socket.io')(3000).on('connection', function(socket){
require('fs').readFile('image.png', function(err, buf){
socket.emit('image', { image: true, buffer: buf });
});
});
Client receives image:
socket.on("image", function(image, buffer) {
if(image){
// do something with image
}
});
I have not tested if it works from client to server. You have to try ;)