c# - C# - 按块上传文件 - 错误的最后一个块大小

Question

我正在尝试将大文件按块上传到第 3 部分服务。但我对最后一块有问题。最后一个块总是小于 5mb，但所有块包括。最后一个大小相同 - 5mb 我的代码：

int chunkSize = 1024 * 1024 * 5;
using (Stream streamx = new FileStream(file.Path, FileMode.Open, FileAccess.Read))
 {
    byte[] buffer = new byte[chunkSize];

    int bytesRead = 0;
    long bytesToRead = streamx.Length;

    while (bytesToRead > 0)
    {

        int n = streamx.Read(buffer, 0, chunkSize);

        if (n == 0) break;

        // do work on buffer...
        // uploading chunk ....
        var partRequest = HttpHelpers.InvokeHttpRequestStream
            (
                new Uri(endpointUri + "?partNumber=" + i + "&uploadId=" + UploadId),
                "PUT",
                 partHeaders,
                 buffer
            );  // upload buffer


        bytesRead += n;
        bytesToRead -= n;

    }
    streamx.Dispose();
 }   

缓冲区上传到第 3 方服务。

标签： c#uploadchunksimage-file

Answer 1

解决了，有人在评论中发布了更新的代码，但几秒钟后删除了这条评论。但是有解决办法。我在之后添加了这部分

if (n == 0)

这段代码，它将最后一个块的大小调整到正确的大小

// Let's resize the last incomplete buffer
if (n != buffer.Length)
    Array.Resize(ref buffer, n);

谢谢你们。

我发布完整的工作代码：

int chunkSize = 1024 * 1024 * 5;
using (Stream streamx = new FileStream(file.Path, FileMode.Open, FileAccess.Read))
 {
    byte[] buffer = new byte[chunkSize];

    int bytesRead = 0;
    long bytesToRead = streamx.Length;

    while (bytesToRead > 0)
    {

        int n = streamx.Read(buffer, 0, chunkSize);

        if (n == 0) break;

        // Let's resize the last incomplete buffer
        if (n != buffer.Length)
           Array.Resize(ref buffer, n);

        // do work on buffer...
        // uploading chunk ....
        var partRequest = HttpHelpers.InvokeHttpRequestStream
            (
                new Uri(endpointUri + "?partNumber=" + i + "&uploadId=" + UploadId),
                "PUT",
                 partHeaders,
                 buffer
            );  // upload buffer


        bytesRead += n;
        bytesToRead -= n;

    }

 }