通过C++亚马逊SDK用线程池写一段vstor传输到亚马逊云s3的代码

以下是一份使用C++亚马逊SDK和线程池实现vstor传输到亚马逊云s3的示例代码：

#include <iostream>
#include <fstream>
#include <sstream>
#include <thread>
#include <mutex>
#include <condition_variable>
#include <aws/core/Aws.h>
#include <aws/s3/S3Client.h>
#include <aws/s3/model/PutObjectRequest.h>
#include <aws/core/utils/memory/stl/AWSStringStream.h>
#include <aws/core/utils/StringUtils.h>
#include <aws/core/utils/threading/Executor.h>
#include <aws/core/utils/threading/ThreadPool.h>

using namespace std;
using namespace Aws::S3;
using namespace Aws::S3::Model;
using namespace Aws::Utils;
using namespace Aws::Utils::Threading;

// 亚马逊s3存储桶名称和文件名
static const char* BUCKET_NAME = "my-bucket";
static const char* OBJECT_KEY = "my-object-key";

// 读取vstor文件的线程任务类
class FileReaderTask : public Runnable {
public:
    FileReaderTask(const char* file_path, char* buffer, int buffer_size) : 
        m_file_path(file_path), m_buffer(buffer), m_buffer_size(buffer_size) {}

    void Run() override {
        ifstream file(m_file_path, ios::binary);
        if (!file) {
            cerr << "Failed to open file: " << m_file_path << endl;
            return;
        }

        // 读取文件到缓冲区中
        file.read(m_buffer, m_buffer_size);
        if (!file) {
            cerr << "Failed to read file: " << m_file_path << endl;
            return;
        }

        m_read_size = static_cast<int>(file.gcount());
    }

    int GetReadSize() const { return m_read_size; }

private:
    const char* m_file_path;
    char* m_buffer;
    int m_buffer_size;
    int m_read_size = 0;
};

// 上传vstor文件的线程任务类
class UploadTask : public Runnable {
public:
    UploadTask(S3Client* s3_client, const char* buffer, int buffer_size) :
        m_s3_client(s3_client), m_buffer(buffer), m_buffer_size(buffer_size) {}

    void Run() override {
        Aws::StringStream sstream;
        sstream << "bytes=" << m_uploaded_size << "-" << (m_buffer_size - 1);
        Aws::String range_str = sstream.str();

        // 构造上传请求
        PutObjectRequest request;
        request.SetBucket(BUCKET_NAME);
        request.SetKey(OBJECT_KEY);
        request.SetBody(&(m_buffer[m_uploaded_size]), m_buffer_size - m_uploaded_size);
        request.SetContentLength(m_buffer_size - m_uploaded_size);
        request.SetContentRange(range_str);

        // 执行上传请求
        auto outcome = m_s3_client->PutObject(request);
        if (!outcome.IsSuccess()) {
            cerr << "Failed to upload object: " << outcome.GetError().GetMessage() << endl;
            return;
        }

        m_uploaded_size = m_buffer_size;
    }

private:
    S3Client* m_s3_client;
    const char* m_buffer;
    int m_buffer_size;
    int m_uploaded_size = 0;
};

int main(int argc, char** argv) {
    if (argc != 2) {
        cerr << "Usage: " << argv[0] << " file_path" << endl;
        return 1;
    }

    // 初始化亚马逊SDK
    Aws::SDKOptions options;
    Aws::InitAPI(options);

    // 创建s3客户端
    S3Client s3_client;

    // 创建线程池
    ThreadPool thread_pool(4);

    // 读取vstor文件
    const int BUFFER_SIZE = 1024 * 1024; // 缓冲区大小为1MB
    char buffer[BUFFER_SIZE];
    FileReaderTask file_reader_task(argv[1], buffer, BUFFER_SIZE);
    thread_pool.SubmitRunnable(file_reader_task);
    file_reader_task.WaitUntilFinished();

    // 上传vstor文件
    int read_size = file_reader_task.GetReadSize();
    for (int uploaded_size = 0; uploaded_size < read_size; ) {
        UploadTask upload_task(&s3_client, buffer, read_size);
        thread_pool.SubmitRunnable(upload_task);
        upload_task.WaitUntilFinished();

        uploaded_size = upload_task.GetUploadedSize();
    }

    // 关闭线程池
    thread_pool.Shutdown();

    // 关闭亚马逊SDK
    Aws::ShutdownAPI(options);

    return 0;
}

该示例代码中，首先使用C++亚马逊SDK和线程池读取vstor文件到缓冲区中，然后使用线程池上传缓冲区中的数据到亚马逊s3存储桶中。上传过程中，将缓冲区分为若干段，每段使用一个线程来上传。当上传完一段数据后，再上传下一段数据，直至上传完整个缓冲区。