Google Drive and blob files

Hi,

I've a problem with my app, i'm beginner and i would like to upload my images on Google Drive :

1 - The authentication is good 2 - The problem is in the mime Type, i think

This is the function, i use for try to upload in my G-Drive

[CODE] function upLoadFile(myAccessToken, myFileName, blobData) {

var base64image = Ti.Utils.base64encode(blobData); //convert blob to base64 encoded string
var reqBody = '--foo_bar_baz\nContent-Type: application/json; charset=UTF-8\n\n{"title": "' + myFileName+".jpg" + '"}\n--foo_bar_baz\nContent-Type: image/jpeg\nContent-Transfer-Encoding: base64\n\n' + base64image + '\n--foo_bar_baz--';
var url = "https://www.googleapis.com/upload/drive/v2/files";
var client = Ti.Network.createHTTPClient({
    onload : function(e) {
        //Ti.API.info("Received text: " + this.responseText);
        alert('Fichier : '+myFileName+' ok');
    },
    onerror : function(e) {
        //Ti.API.debug(e.error);
        alert('error');
    },
    timeout : 100000000
});
client.open("POST", url);
client.setRequestHeader('Authorization', "Bearer " + myAccessToken); 
client.setRequestHeader('Content-Type', 'multipart/related; boundary="foo_bar_baz"' ); 
client.send(reqBody);

} [/CODE]

And this is the loop , to get the file in my app

[CODE] $.move.addEventListener('click', function(e) {

/* Pour Parcourir ANDROID pas IOS */
var dir = Titanium.Filesystem.getFile(Titanium.Filesystem.externalStorageDirectory);
Ti.API.info('FICHIER : '+dir);
googleAuth.isAuthorized(function() 
{
    var contents = dir.getDirectoryListing();
    for(var content in contents)
    {
        Ti.API.info(contents[content]);
        var blob = contents[content].read();
        Ti.API.info("Blob ? "+blob);
    }   
}, 
function() 
{
    googleAuth.authorize();
});

}); [/CODE]

The function need a blob, but there is something wrong... if someone can help me...

Best Regards