c# - 将文件从 Azure 存储 blob 移动到 Ftp 服务器

Question

我需要将一些文件从 Azure 存储上传到外部 Ftp 服务器。

Azure 有没有办法直接上传这些文件而无需事先下载它们？

Answer 1

您需要使用两个类/库并在此处创建两个方法:

1. WebClient类将文件从 blob 存储下载到本地驱动器
2. 用于移动文件的 FTP 库(例如 WinSCP)

WebClient 类:您需要提供以下格式的 URI 参数:https://[accountname].blob.core.windows.net/[containername]/[filetodownloadincludingextension]

下载位置必须是一个变量，作为要上传到 FTP 服务器的文件的原始位置。

        string uri = "https://[accountname].blob.core.windows.net/[containername]/[filetodownloadincludingextension]/";
        string file = "file1.txt";
        string downloadLocation = @"C:\";

        WebClient webClient = new WebClient();
        Log("Downloading File from web...");
        try
        {
            webClient.DownloadFile(new Uri(uri+file), downloadLocation);
            Log("Download from web complete");
            webClient.Dispose();
        }
        catch (Exception ex)
        {
            Log("Error Occurred in downloading file. See below for exception details");
            Log(ex.Message);
            webClient.Dispose();
        } 
        return downloadLocation + file;

下载到本地驱动器后，您需要将其上传到 FTP/SFTP 服务器。为此，您可以使用 WinSCP 库:

        string absPathSource = downloadLocation + file;
        string destination = "/root/folder"; //this basically is your FTP path

    // Setup session options
        SessionOptions sessionOptions = new SessionOptions
        {

            Protocol = Protocol.Sftp,
            HostName = ConfigurationManager.AppSettings["scpurl"],
            UserName = ConfigurationManager.AppSettings["scpuser"],
            Password = ConfigurationManager.AppSettings["scppass"].Trim(),
            SshHostKeyFingerprint = ConfigurationManager.AppSettings["scprsa"].Trim()
        };

        using (Session session = new Session())
        {

            //disable version checking
            session.DisableVersionCheck = true;

            // Connect
            session.Open(sessionOptions);

            // Upload files
            TransferOptions transferOptions = new TransferOptions();
            transferOptions.TransferMode = TransferMode.Binary;

            TransferOperationResult transferResult;
            transferResult = session.PutFiles(absPathSource, destination, false, transferOptions);

            // Throw on any error
            transferResult.Check();

            // Print results
            foreach (TransferEventArgs transfer in transferResult.Transfers)
            {
                //Console.WriteLine("Upload of {0} succeeded", transfer.FileName);
            }
        }

如果您想在上传后从本地硬盘删除文件，您可以在上传到 FTP 代码的末尾添加 File.Delete 代码。