# File lib/s3/key.rb, line 126
    def put(data=nil, perms=nil, headers={})
      headers['x-amz-acl'] = perms if perms
      @data = data || @data
      meta  = self.class.add_meta_prefix(@meta_headers)
      @bucket.s3.interface.put(@bucket.name, @name, @data, meta.merge(headers))
    end