_signature="PUT\n\n${content_type}\n${date}\n${resource}"
signature=`echo -en ${_signature} | openssl sha1 -hmac ${s3_s} -binary | base64`
_signature="PUT\n\n${content_type}\n${date}\n${resource}"
signature=`echo -en ${_signature} | openssl sha1 -hmac ${s3_s} -binary | base64`