下载文件到内存

实现下载指定文件(Object)到内存。代码中需要引用"inspurcloud/oss/OssClient.h"类库，使用InspurCloud::OSS命名空间，并初始化账号信息AccessKeyId、AccessKeySecret、Endpoint，示例代码：

        //指定目标文件所存在的桶以及目标文件(Object)名称
        std::string BucketName = "yourBucketName";
        std::string ObjectName = "yourObjectName";

        //初始化资源
        InitializeSdk();
        ClientConfiguration conf;
        OssClient client(Endpoint, AccessKeyId, AccessKeySecret, conf);

        //获取文件到内存
        GetObjectRequest request(BucketName, ObjectName);
        auto outcome = client.GetObject(request);

        //处理结果
        if (outcome.isSuccess()) {
            std::cout << "getObjectToBuffer success"<<std::endl;
            std::cout << "Content-Length:" << outcome.result().Metadata().ContentLength() << std::endl;
            std::string content;
            while (std::getline(*(outcome.result().Content()), content)) {
                std::cout << content << std::endl << std::endl;
            }
        }
        //异常处理
        else {
            std::cout << "getObjectToBuffer fail" << std::endl;
            std::cout << "error code:" << outcome.error().Code() << std::endl;
            std::cout << "error message:" << outcome.error().Message() << std::endl;
            std::cout << "requestId:" << outcome.error().RequestId() << std::endl;
            ShutdownSdk();
            return -1;
        }

        //释放资源
        ShutdownSdk();