追加上传

• 使用内存中资源对文件(Object)追加上传。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：

        //指定上传到的存储桶以及需要追加的文件(Object)
        std::string BucketName = "yourBucketName";
        std::string ObjectName = "yourObjectName";
  
        //初始化资源
        InitializeSdk();
        ClientConfiguration conf;
        OssClient client(Endpoint, AccessKeyId, AccessKeySecret, conf);
        auto meta = ObjectMetaData();
        meta.setContentType("text/plain");
  
        //第一次追加的位置是0,返回值为下一次追加的位置，后续追加的位置是追加前文件的长度。
        std::shared_ptr<std::iostream> content1 = std::make_shared<std::stringstream>();
        *content1 <<"Welcome to Inspur Cloud Object Storage Service(first)！";
        AppendObjectRequest request(BucketName, ObjectName, content1, meta);
        request.setPosition(0L);
  
        //第一次追加文件
        auto result = client.AppendObject(request);
  
        //处理结果
        if (!result.isSuccess()) {
            std::cout << "AppendObject fail" << std::endl;
            std::cout << "error code:" << result.error().Code() << std::endl;
            std::cout << "error message:" << result.error().Message() << std::endl;
            std::cout << "requestId:" << result.error().RequestId() << std::endl;
            ShutdownSdk();
            return -1;
        }
        else{
            std::cout << "AppendObject success！" << std::endl;
        }
  
        std::shared_ptr<std::iostream> content2 = std::make_shared<std::stringstream>();
        *content2 <<"Welcome to Inspur Cloud Object Storage Service(second)！";
        auto position = result.result().Length();
        AppendObjectRequest appendObjectRequest(BucketName, ObjectName, content2);
        appendObjectRequest.setPosition(position);
  
        //第二次追加文件
        auto outcome = client.AppendObject(appendObjectRequest);
  
        //处理结果
        if (!result.isSuccess()) {
            std::cout << "AppendObject 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;
        }
        else{
            std::cout << "AppendObject success！" << std::endl;
        }
  
        //释放资源
        ShutdownSdk();
  

• 使用本地文件对文件(Object)追加上传。代码中需要引用"inspurcloud/oss/OssClient.h"类库、"fstream"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：

        //指定上传到的存储桶以及需要追加的文件(Object)
        std::string BucketName = "yourBucketName";
        std::string ObjectName = "yourObjectName";
  
        //初始化资源
        InitializeSdk();
        ClientConfiguration conf;
        OssClient client(Endpoint, AccessKeyId, AccessKeySecret, conf);
        auto out = client.HeadObject(BucketName, ObjectName);
        auto length = out.result().ContentLength();
        auto meta = ObjectMetaData();
        meta.setContentType("text/plain");
        //"yourLocalFilename"需要包含本地路径，例如C:\\Users\\NAME\\Desktop\\abc.txt
        auto fileToUpload = "yourLocalFilename";
        auto result = client.AppendObject(BucketName, ObjectName, fileToUpload, length);
  
        //处理结果
        if (!result.isSuccess()) {
            std::cout << "AppendObject fail" << std::endl;
            std::cout << "error code:" << result.error().Code() << std::endl;
            std::cout << "error message:" << result.error().Message() << std::endl;
            std::cout << "requestId:" << result.error().RequestId() << std::endl;
            ShutdownSdk();
            return -1;
        }
        else{
            std::cout << "AppendObject success！" << std::endl;
        }
  
        //释放资源
        ShutdownSdk();
  

• 注意：追加上传过程中,如果目标文件为不可追加文件，则会引发ObjectNotAppendable 异常。