对象存储 OSS：C++上传进度条

下面的代码以PutObject方法为例，介绍如何使用进度条。

#include <alibabacloud/oss/OssClient.h>
#include <fstream>
using namespace AlibabaCloud::OSS;

void ProgressCallback(size_t increment, int64_t transfered, int64_t total, void* userData)
{
    // increment表示本次回调发送的数据大小。
    // transfered表示已上传的数据大小。
    // total表示上传文件的总大小。
    std::cout << "ProgressCallback[" << userData << "] => " <<
    increment <<" ," << transfered << "," << total << std::endl;
}


int main(void)
{
    /* 初始化OSS账号信息。*/
            
    /* yourEndpoint填写Bucket所在地域对应的Endpoint。以华东1（杭州）为例，Endpoint填写为https://oss-cn-hangzhou.aliyuncs.com。*/
    std::string Endpoint = "yourEndpoint";
    / *yourRegion填写Bucket所在地域对应的Region。以华东1（杭州）为例，Region填写为cn - hangzhou。 * /
    std::string Region = "yourRegion";
    /* 填写Bucket名称，例如examplebucket。*/
    std::string BucketName = "examplebucket";
    /* 填写Object完整路径，完整路径中不能包含Bucket名称，例如exampledir/exampleobject.txt。*/
    std::string ObjectName = "exampledir/exampleobject.txt";

    /* 初始化网络等资源。*/
    InitializeSdk();

    ClientConfiguration conf;
    conf.signatureVersion = SignatureVersionType::V4;
    /* 从环境变量中获取访问凭证。运行本代码示例之前，请确保已设置环境变量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。*/
    auto credentialsProvider = std::make_shared<EnvironmentVariableCredentialsProvider>();
    OssClient client(Endpoint, credentialsProvider, conf);
    client.SetRegion(Region);
  
    /* yourLocalFilename填写本地文件完整路径。*/
    std::shared_ptr<std::iostream> content = std::make_shared<std::fstream>("yourLocalFilename", std::ios::in|std::ios::binary);
    PutObjectRequest request(BucketName, ObjectName, content);
  
    TransferProgress progressCallback = { ProgressCallback , nullptr };
    request.setTransferProgress(progressCallback);
   
    /* 上传文件。*/
    auto outcome = client.PutObject(request);

    if (!outcome.isSuccess()) {
        /* 异常处理。*/
        std::cout << "PutObject fail" <<
        ",code:" << outcome.error().Code() <<
        ",message:" << outcome.error().Message() <<
        ",requestId:" << outcome.error().RequestId() << std::endl;
        return -1;
    }

    /* 释放网络等资源。*/
    ShutdownSdk();
    return 0;
}