使用C＃上传到服务器后，Zip文件越来越损坏 [英] Zip file is getting corrupted after uploaded to server using C#

问题描述

我试图上传一个zip使用 C＃（Framework 4中）键，下面是我的代码。文件服务器

I am trying to upload a zip file to server using C# (Framework 4)and following is my code.

string ftpUrl = ConfigurationManager.AppSettings["ftpAddress"];
string ftpUsername = ConfigurationManager.AppSettings["ftpUsername"];
string ftpPassword = ConfigurationManager.AppSettings["ftpPassword"];  
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(ftpUrl + "Transactions.zip");  
request.Proxy = new WebProxy(); //-----The requested FTP command is not supported when using HTTP proxy.
request.Method = WebRequestMethods.Ftp.UploadFile;
request.Credentials = new NetworkCredential(ftpUsername, ftpPassword);
StreamReader sourceStream = new StreamReader(fileToBeUploaded);
byte[] fileContents = Encoding.UTF8.GetBytes(sourceStream.ReadToEnd());
sourceStream.Close();
request.ContentLength = fileContents.Length;
Stream requestStream = request.GetRequestStream();
requestStream.Write(fileContents, 0, fileContents.Length);
requestStream.Close();
FtpWebResponse response = (FtpWebResponse)request.GetResponse();
Console.WriteLine("Upload File Complete, status {0}", response.StatusDescription);
            response.Close();  

该zip文件上传成功，但是当我试图从服务器打开压缩文件（手动） ，它向我展示了档案意外结束错误。结果
。对于我使用的文件压缩 Ionic.zip DLL 。传输压缩文件之前，我是能够成功地提取。

The zip file is uploaded successfully, but when I tried to open the zip file from server(manually), it showed me Unexpected end of archive error.
For file compression I am using Ionic.zip dll. Before transferring the zip file, I was able to extract successfully.

任何帮助表示赞赏。谢谢。

Any help appreciated. Thanks.

推荐答案

这就是问题所在：

StreamReader sourceStream = new StreamReader(fileToBeUploaded);
byte[] fileContents = Encoding.UTF8.GetBytes(sourceStream.ReadToEnd());

的StreamReader （和任何的TextReader ）现在的文本的数据。 。一个zip文件是不是文本数据

StreamReader (and any TextReader) is for text data. A zip file isn't text data.

只需使用：

byte[] fileContents = File.ReadAllBytes(fileToBeUploaded);

你不把二进制数据作为文本方式，所以它不应该遭到损坏。

That way you're not treating binary data as text, so it shouldn't get corrupted.

或者，不要将其全部加载到内存中单独 - 只是流中的数据：

Or alternatively, don't load it all into memory separately - just stream the data:

using (var requestStream = request.GetRequestStream())
{
    using (var input = File.OpenRead(fileToBeUploaded))
    {
        input.CopyTo(requestStream);
    }
}

另外请注意，你应该使用使用语句对所有这些流，而不是只调用关闭 - 这样即使有异常抛出的资源将被全部销毁。

Also note that you should be using using statements for all of these streams, rather than just calling Close - that way the resources will be disposed even if an exception is thrown.

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