WebKitFormBoundary header on file ulpoad - ajax

Question

To avoid sharing a third-service api token, I want to upload my files trough my node server.
To do this, I've my webpage sending my files in ajax to my node server which is sending them to the 3rd party api.
so :
client > ajax > node > api
My file succeed to arrive on the third party service but with WebKitFormBoundary header and footer.
------WebKitFormBoundaryBvPXh46XrNOYDFJn
Content-Disposition: form-data; name="file"; filename="Screen Shot 2014-11-20 at 15.01.45.png"
Content-Type: image/png
<< file bytes >>
------WebKitFormBoundaryBvPXh46XrNOYDFJn--
Ajax code :
$.uploadFiles = function(file){
var data = new FormData();
data.append('file', file, file.name);
console.log(data);
$.ajax({
//url: 'https://slack.com/api/files.upload?token=xoxp-2964595734-2964595740-3128685143-b1796a&channels='+settings.joinedChannel+'&pretty=1',
url: '/app/fileUpload?token='+settings.token+'&channel='+settings.joinedChannel,
type: 'POST',
data: data,
cache: false,
dataType: 'json',
processData: false, // Don't process the files
contentType: false, // Set content type to false as jQuery will tell the server its a query string request
success: function(data, textStatus, jqXHR)
{
if(typeof data.error === 'undefined')
{
// Success so call function to process the form
//submitForm(event, data);
console.log(data);
}
else
{
// Handle errors here
console.log('ERRORS: ' + data.error);
}
},
error: function(jqXHR, textStatus, errorThrown)
{
// Handle errors here
console.log('ERRORS: ' + textStatus);
// STOP LOADING SPINNER
}
});
};
Node code
app.post('/app/fileUpload', isAuthorized, function(req, res, next) {
var token = req.param('token');
var channel = req.param('channel');
var req = req;
models.app.find({ where: { token: token, active: true } }).success(function(application) {
slack.uploadFile(application.slack_api_token,channel,req);
return res.status(200).json({ success: true, message: "Uploading" });
});
});
[....]
uploadFile: function uploadFile(applicationToken,channel,file) {
var formData = {
// Pass a simple key-value pair
token: applicationToken,
// Pass a simple key-value pair
channels: channel,
// Pass data via Streams
file: file
};
request.post('https://slack.com/api/files.upload?pretty=1', { formData: formData }, function (error, response, body) {
if (!error && response.statusCode == 200 && typeof body.ok !== "undefined" && body.ok == true) {
console.log("OK");
//console.log(body);
} else {
console.log("Not OK");
//console.log(response);
}
});
},
FIXED : with formidable and this code to manage the file stream :
file: {
value: fs.createReadStream(stream.file.path),
options: {
filename: stream.file.name,
contentType: stream.file.type
}
}