将图片直接上传到OSS上,不中转;
参考网址：https://help.aliyun.com/document_detail/31920.html?spm=5176.doc31931.6.206.OEtePt

load_auto_cache("aliyun_sts");

	/**
	 * 将图片直接上传到OSS上,不中转;
	 * 参考网址：https://help.aliyun.com/document_detail/31920.html?spm=5176.doc31931.6.206.OEtePt
	 * status: 1,
		//上传文件时,必要的3个参数
		AccessKeyId: "",
		AccessKeySecret: "",
		SecurityToken: "",
		
		//过期时间,客户端不关心
		Expiration: "2016-09-28T10:30:02Z",
		
		//出错时,返回下面3个参数
		RequestId: "",
		Code: "",
		Message: "",
		
		//回调地址
		callbackUrl: "",
		callbackBody: "",
		
		//文件存放目录
		dir: ""
	 */