如何附加到Azure存储文件共享中的文件？ [英] How do I append to a file in an Azure storage file share?

问题描述

我想将条目写入存储在Azure文件存储中的日志文件中。我目前有这个：

I want to write entries to a log file stored in Azure file storage. I currently have this:

var log = "My log entry";

var client = _storageAccount.CreateCloudFileClient();
var share = client.GetShareReference(Config.LogShare);
share.CreateIfNotExists();
var root = share.GetRootDirectoryReference();
var logfile = root.GetFileReference("log.txt");
if (!logfile.Exists()) logfile.Create(0);

// What goes here to append to the file...?

我可以看到很多有关如何使用Blob执行此操作或如何上传整个文件的示例，但是如何附加到现有文件呢？

I can see plenty of examples of how to do this with Blobs, or how to upload an entire file, but how do I just append to an existing file?

我已经尝试过：

var buffer = Encoding.GetEncoding("UTF-8").GetBytes(log.ToCharArray());

using (var fileStream = logfile.OpenWrite(0)) {
    fileStream.Write(buffer, (int)logfile.Properties.Length, buffer.Length);
}

但随后出现此错误：

The remote server returned an error: (416) The range specified is invalid for the current size of the resource..

推荐答案

Azure文件存储REST API不支持附加到现有文件。为此，请将文件共享作为驱动器安装到计算机上，然后像简单的本地文件一样附加到文件中。

Azure file storage REST API doesn't support appending to an existing file. To achieve this, please mount the file share to your machine as a drive, and append to the file just like simple local files.

实际上，我不认为您确实需要根据上面的代码附加功能。您可以在CloudFile.OpenWrite（）/ CloudFile.Create（）中指定文件大小，或尝试 CloudFile.UploadFromStream（）而不是CloudFile.OpenWrite（）。

Actually, I don't think you really need appending functionality per your code above. You can specify the file size in CloudFile.OpenWrite() / CloudFile.Create(), or try CloudFile.UploadFromStream() instead of CloudFile.OpenWrite().

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