如何监控文件上传进度？ [英] How to monitor file upload progress?

问题描述

我需要将文件上传到服务器并监控其进度。
i需要通知每次发送多少字节。

I need to upload a file to server and monitor it's progress. i need to get a notification how many bytes are sent each time.

例如，在下载的情况下，我有：

For example in case of download i have:

HttpURLConnection  connection = (HttpURLConnection) m_url.openConnection();
connection.connect();
InputStream stream = connection.getInputStream();
while ((currentBytes  = stream.read(byteBuffer)) > 0) {                    
    totalBytes+=currentBytes;
    //calculate something...
}

现在我需要做上传相同。但是如果使用

Now i need to do the same for upload. but if use

OutputStreamWriter stream = new OutputStreamWriter(connection.getOutputStream());
stream.write(str);
stream.flush();

比我无法得到任何进程通知，关于发送多少字节（看起来像automic行动）。

than i can't get any progres notification, about how many bytes are sent (it looks like automic action).

有任何建议吗？

谢谢

推荐答案

我使用过ChannelSocket对象。此对象允许在访问服务器时执行阻塞读写操作。因此，我使用此套接字模拟HTTP，并且每个写入请求都被阻止，直到它完成。这样我就可以跟随写入事务的实际进度。

I have used ChannelSocket object. This object allows to do blocking read and write when accessing the server. So i emulated HTTP using this socket and each write request was blocked untill it was done. This way i could follow the actual progress of write transaction.

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