OptionalcallbackOptionalContent-set the request content type
Optionalexpiresafter expires seconds, the url will become invalid, default is 1800
Optionalmethodthe HTTP method, default is 'GET'
Optionalprocessimage process params, will send with x-oss-process e.g.: {process: 'image/resize,w_200'}
Optionalresponseset the response headers for download
Optionalsubadditional signature parameters in url
Optionaltraffictraffic limit, range: 819200~838860800
set the callback for the operation