first.cpp

        try {
                InitializeSdk();
                string   acessKey = "LTAI4FdgRS23ETv1LfqSsyVS";
                string  secret = "LNJGNlhmp9B7oE090cydWPuGGiczMQ";
                string   endpoint = "oss-cn-shanghai.aliyuncs.com";
                string  bucket = "room-20211208";
                FString filePath = FPaths::ProjectContentDir();
                string path(TCHAR_TO_UTF8(*filePath));
                ClientConfiguration conf;
                /* 设置连接池数，默认为16个。*/
                conf.maxConnections = 20;

                /* 设置请求超时时间，超时没有收到数据就关闭连接，默认为10000ms。*/
                conf.requestTimeoutMs = 8000;
                OssClient client(endpoint, acessKey, secret, conf);


                /* 填写文件完整路径，例如exampledir/exampleobject.txt。文件完整路径中不能包含Bucket名称 */
                string ObjectName = "text1.txt";
                
                /* 填写本地文件完整路径，例如D:\\localpath\\examplefile.txt，其中localpath为本地文件examplefile.txt所在本地路径 */
                string FileNametoSave = path+"Test/text1.txt";
                
                
                //GetObjectRequest request(bucket, ObjectName);
                //        request.setResponseStreamFactory([=]() {return std::make_shared<std::fstream>(FileNametoSave, std::ios_base::out | std::ios_base::in | std::ios_base::trunc | std::ios_base::binary); });
                //request.setResponseStreamFactory([=]() {return std::make_shared<std::fstream>(FileNametoSave, std::ios_base::out | std::ios_base::in | std::ios_base::trunc | std::ios_base::binary); });
                //auto outcome = client.GetObject(request);

                
                GetObjectOutcome outcome = client.GetObject(bucket,ObjectName, FileNametoSave);
                
                if (outcome.isSuccess() !=true ) {
                        cout << "failed" << endl;
                        ShutdownSdk();
                        return "failed";
                }
                else {
                        cout << "success" << endl;
                }
                ShutdownSdk();
                

        
                return path;
        }
        catch (std::exception e) {
                cout << "exception: %s" << "exception" << endl;
                return "exception";
        }