aws sdk cpp中S3相关的应用和示例 | ictfox blog

/*
 * Put one file slice to s3 object
 */
 int S3Storage::put_object_from_file_slice(const S3Client &client,
          const Aws::String bucket,
                                           const Aws::String object,
                                           const string &file_name,
                                           const uint64_t offset,
                                           const uint64_t length)
{
...
    // Upload file with slices to s3 paralleled
    PutObjectRequest request;
    request.WithKey(object).WithBucket(bucket);

    Aws::FStream local_file;
    local_file.open(file_name.c_str(), std::ios::in | std::ios::binary);
    assert(local_file.good());

    Array<uint8_t> file_contents(length);
    local_file.seekg(offset, std::ios::beg);
    cout << "file read offset " << local_file.tellg() << endl;
    local_file.read((char*)file_contents.GetUnderlyingData(),
                    file_contents.GetLength());
    local_file.close();

    //set the stream that will be put to s3
    auto sbuff = Aws::New<Aws::Utils::Stream::PreallocatedStreamBuf>(CLASS_TAG,
                                    &file_contents, file_contents.GetLength());
    auto sbody = Aws::MakeShared<Aws::IOStream>("whatever string", sbuff);
    request.SetBody(sbody);

    auto outcome = client.PutObject(request);
    if(outcome.IsSuccess()) {
        cout << "Put object succeeded!" << endl;
    } else {
        cout << "PutObject error: " <<
                outcome.GetError().GetExceptionName() << " - " <<
                outcome.GetError().GetMessage() << endl;
    }
...
}