cinely/mule-uploader — pull request #5 by tuler (2013-05-10 15:30:34+00:00)
Title: Updated doc about CORS suggestion, adding HEAD method.

Sometimes PUT to S3 fails, and the code tries to recover from this error by issuing a HEAD to request to the bucket to check if the upload has succeeded or not.
In my bucket I had not included the HEAD method to CORS, so this request was failing and the upload could not recover from the PUT error.