webservice/upload.php returning zero instead of actual itemid

Hello everyone,

I'm using this "webservice" to upload files in moodle, which is fine, but when the json string is retrieved, it has itemid set to 0 (zero).

But whe I log in into moodle later, this uploaded file has a different itemid. I suppose that itemid is the huge number in the following link, which I can use to adress file

I'm on moodle 2.3

draftfile.php/104/user/draft/419799805/test6/image.jpg

my question is, how can I get the link to uploaded file, if the itemid is always 0???

Thanks M