将媒体文件上载到4 MB以上的Azure文件共享会损坏它们

问题描述

我正在尝试通过Azure.Storage.Files.Shares库将大文件上传到Azure文件共享，我在大约4 MB以上的所有媒体文件（图像，PDF等）中遇到损坏问题。 Azure文件共享对单个请求的限制为4 MB，这就是为什么我将上传分为多个块的原因，尽管每个块上传都返回201，但它仍然会损坏文件。

注意：

似乎不必写多个块是一个问题，因为我可以根据需要在任意多个块中写入一个3 MB的文件，这将是很好的
.txt大小超过4 MB的文件没有问题，上传后显示完全正常

此功能的此上载部分基本上是从我发现的有关此问题的唯一其他堆栈溢出“解决方案”中复制/粘贴的：

public async Task WriteFileFromStream(string fullPath,MemoryStream stream)
{
    // Get pieces of path
    string dirName = Path.GetDirectoryName(fullPath);
    string fileName = Path.GetFileName(fullPath);
    
    ShareClient share = new ShareClient(this.ConnectionString,this.ShareName);

    // Set position of the stream to 0 so that we write all contents
    stream.Position = 0;
    try
    {
        // Get a directory client for specified directory and create the directory if it doesn't exist
        ShareDirectoryClient directory = share.GetDirectoryClient(dirName);
        directory.CreateIfNotExists();

        if (directory.Exists())
        {
            // Get file client
            ShareFileClient file = directory.GetFileClient(fileName);
            
            // Create file based on stream length
            file.Create(stream.Length);

            int blockSize = 300 * 1024; // can be anything as long as it doesn't exceed 4194304
            long offset = 0; // Define http range offset
            BinaryReader reader = new BinaryReader(stream);

            while (true)
            {
                byte[] buffer = reader.ReadBytes(blockSize);
                if (buffer.Length == 0)
                    break;

                MemoryStream uploadChunk = new MemoryStream();
                uploadChunk.Write(buffer,buffer.Length);
                uploadChunk.Position = 0;

                HttpRange httpRange = new HttpRange(offset,buffer.Length); // offset -> buffer.Length-1 (inclusive)
                var resp = file.UploadRange(httpRange,uploadChunk);
                
                Console.WriteLine($"Wrote bytes {offset}-{offset+(buffer.Length-1)} to {fullPath}. Response: {resp.GetRawResponse()}");
                offset += buffer.Length;    // Shift the offset by number of bytes already written
            }

            reader.Close();
        }
        else
        {
            throw new Exception($"Failed to create directory: {dirName}");
        }
    }
    catch (Exception e)
    {
        // Close out memory stream
        throw new Exception($"Error occured while writing file from stream: {e.Message}");
    }
}

对此表示任何帮助。

解决方法

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