Uploading a raw file to Rails using Carrierwave

My clients are trying to upload an image from Blackberry and Android phones. They don't like posting a)form parameters or b) multipart messages. What they would like to do is do a POST to a url with only the data from the file. Something like this can be done in curl: curl -d @google.png http://server/postcards/1/photo.json -X POST I'd like the uploaded photo to put into the photo attribute of the