S3实现MINIO大文件上传并显示上传进度

目的

早两天写了一篇S3简单上传文件的小工具，知乎上看到了一个问题问如何实现显示MINIO上传进度，因此拓展一下这个小工具能够在上传大文件时显示进度。

完整代码托管于Github：mrchipset/simple-wpf

实现方式

先通过Xaml编写一个包含上传进度条的小界面。具体内容就不赘述了，可以参考这篇文章
为了得到上传进度就不能再简单地使用PutObjectRequest 进行上传需要使用S3中TransferUtility 提供的高等级API进行上传。
然后创建一个TransferUtilityUploadRequest 对象并绑定其UploadProgressEvent 事件以实现上传进度的监控

具体的实现代码如下：

private async Task<bool> UploadLargeFileAsync()
{
    var credentials = new BasicAWSCredentials(_accessKey, _secretKey);

    var clientConfig = new AmazonS3Config
    {
        ForcePathStyle = true,
        ServiceURL = _endpoint,
    };

    bool ret = true;
    using (var client = new AmazonS3Client(credentials, clientConfig))
    {


        try
        {
            var fileTransferUtility = new TransferUtility(client);

            var uploadRequest = new TransferUtilityUploadRequest
            {
                BucketName = LargeBucket,
                FilePath = UploadLargeFile,
                Key = System.IO.Path.GetFileName(UploadLargeFile)
            };

            uploadRequest.UploadProgressEvent += UploadRequest_UploadProgressEvent;

            await fileTransferUtility.UploadAsync(uploadRequest);
        }
        catch (FileNotFoundException e)
        {
            ret = false;
            this.Dispatcher.Invoke(new Action(() => this.statusLargeTxtBlk.Text = e.Message));
        }
        catch (AmazonS3Exception e)
        {
            ret = false;
            if (e.ErrorCode != null &&
                (e.ErrorCode.Equals("InvalidAccessKeyId") ||
            e.ErrorCode.Equals("InvalidSecurity")))
            {
                this.Dispatcher.Invoke(new Action(() => this.statusLargeTxtBlk.Text = "Please check the provided AWS Credentials"));
            }
            else
            {
                this.Dispatcher.Invoke(new Action(() => this.statusLargeTxtBlk.Text = $"An error occurred with the message '{e.Message}' when writing an object"));
            }
        }
        catch(Exception e)
        {
            this.Dispatcher.Invoke(new Action(() => this.statusLargeTxtBlk.Text = $"An error occurred with the message '{e.Message}' when writing an object"));
        }
    }
    return ret;
}

private void UploadRequest_UploadProgressEvent(object? sender, UploadProgressArgs e)
{
    this.Dispatcher.Invoke((Action)(() =>
    {
        this.uploadProgress.Value = e.TransferredBytes * 100 / e.TotalBytes ;
    }));
}

值得一提的时，在上传进度的事件处理函数中，由于我们通过异步方法执行上传函数，因此我们需要使用Dispatcher 来更新数据到UI 上。