移动及重命名场景（C++ SDK）--对象存储-火山引擎

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移动及重命名场景（C++ SDK）

最近更新时间：2024.04.26 17:28:05首次发布时间：2023.01.29 15:35:46

如果您需要在 Bucket 中对文件进行重命名，您可以通过 CopyObject 接口将源对象拷贝至目标对象，然后通过 DeleteObject 接口删除源对象。

移动/重命名单个对象

以下代码用于将桶 srcbucket 中对象 srcdir/exampleobject.txt 重命名为 destbucket 中的 destdir/exampleobject.txt。

#include "TosClientV2.h"
using namespace VolcengineTos;

int main(void){
    // 初始化 TOS 账号信息
    // Your Region 填写 Bucket 所在 Region
    std::string region = "Your Region";
    std::string accessKey = std::getenv("TOS_ACCESS_KEY");
    std::string secretKey = std::getenv("TOS_SECRET_KEY");
    // 填写 Bucket 名称，例如 destbucket
    std::string bucketName = "destbucket";
    // 填写Object完整路径，完整路径中不能包含Bucket名称，destdir/exampleobject.txt。
    std::string objectName = "destdir/exampleobject.txt";
    // 填写 Bucket 名称，例如 srcbucket
    std::string srcBucketName = "srcbucket";
    // 填写Object完整路径，完整路径中不能包含Bucket名称，srcdir/exampleobject.txt。
    std::string srcObjectName = "srcdir/exampleobject.txt";
    
    // 初始化网络等资源
    InitializeClient();
    // 创建交互的 client
    TosClientV2 client(region, accessKey, secretKey);

    CopyObjectV2Input input(bucketName, objectName, srcBucketName,srcObjectName);
    auto output = client.copyObject(input);
    if (!output.isSuccess()) {
        // 异常处理
        std::cout << "CopyObject failed." << output.error().String() << std::endl;
        // 释放网络等资源
        CloseClient();
        return -1;
    }
    std::cout << "CopyObject success. the object etag:" << output.result().getETag() << std::endl;
    
    
    DeleteObjectInput deleteInput(srcBucketName, srcObjectName);
    auto deleteOutput = client.deleteObject(deleteInput);
    if (!deleteOutput.isSuccess()) {
        // 异常处理
        std::cout << "DeleteObject failed." << output.error().String() << std::endl;
        // 释放网络等资源
        CloseClient();
        return -1;
    }

    std::cout << "DeleteObject success." << std::endl;
    std::cout << " version id is:" <<  deleteOutput.result().getVersionId()
              << " is delete marker:" << deleteOutput.result().isDeleteMarker() << std::endl;
    // 释放网络等资源
    CloseClient();
    return 0;
}

移动/重命名目录

以下代码用于将桶 srcbucket 中目录 exampledir1/ 重命名为 destbucket 中的 exampledir2/。

#include "TosClientV2.h"
using namespace VolcengineTos;

std::string subReplace(std::string resourceStr, std::string subStr, std::string newStr) {
    std::string dstStr = resourceStr;
    std::string::size_type pos = 0;
    dstStr.replace(pos, subStr.length(), newStr);
    return dstStr;
}

int main(void){
    // 初始化 TOS 账号信息
    // Your Region 填写 Bucket 所在 Region
    std::string region = "Your Region";
    std::string accessKey = std::getenv("TOS_ACCESS_KEY");
    std::string secretKey = std::getenv("TOS_SECRET_KEY");
    // 填写 Bucket 名称，例如 examplebucket
    std::string bucketName = "destbucket";
    std::string srcBucketName = "srcbucket";
    std::string dir1 = "exampledir1/";
    std::string dir2 = "exampledir2/";
    // 初始化网络等资源
    InitializeClient();
    // 创建交互的 client
    TosClientV2 client(region, accessKey, secretKey);

    ListObjectsType2Input input(bucketName);
    bool isTruncated = true;
    std::string nextContinuationToken = "";

    while(isTruncated){
        input.setContinuationToken(nextContinuationToken);
        auto output = client.listObjectsType2(input);
        if (!output.isSuccess()) {
            // 异常处理
            std::cout << "ListObjects failed." << output.error().String() << std::endl;
            // 释放网络等资源
            CloseClient();
            return -1;
        }

        nextContinuationToken = output.result().getNextContinuationToken();
        isTruncated = output.result().isTruncated();

        for (const auto& object : output.result().getContents()) {
            auto newKey = object.getKey();
            if (newKey == dir1){
                newKey = dir2;
            } else {
                newKey = subReplace(newKey,dir1,dir2);
            }
            CopyObjectV2Input input(bucketName, newKey, srcBucketName,object.getKey());
            auto output = client.copyObject(input);
            if (!output.isSuccess()) {
                // 异常处理
                if(output.error().getStatusCode() != 404 && output.error().getCode() != "NoSuchKey"){
                    std::cout << "CopyObject failed." << output.error().String() << std::endl;
                    // 释放网络等资源
                    CloseClient();
                    return -1;
                }
            }
            std::cout << "CopyObject success. the object etag:" << output.result().getETag() << std::endl;
            
            DeleteObjectInput deleteInput(srcBucketName,object.getKey());
            auto deleteOutput = client.deleteObject(deleteInput);
            if (!deleteOutput.isSuccess()) {
                // 异常处理
                if(deleteOutput.error().getStatusCode() != 404 && output.error().getCode() != "NoSuchKey"){
                    std::cout << "DeleteObject failed:" << deleteOutput.error().String() << std::endl;
                    // 释放网络等资源
                    CloseClient();
                    return -1;
                }
            }

            std::cout << "DeleteObject success." << std::endl;
            std::cout << " version id is:" <<  deleteOutput.result().getVersionId()
                          << " is delete marker:" << deleteOutput.result().isDeleteMarker() << std::endl;

        }
    }

    // 释放网络等资源
    CloseClient();
    return 0;
}

对象存储

移动/重命名单个对象

移动/重命名目录

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