使用C#上传到服务器后,Zip文件已损坏

Question

我正在尝试将zip文件上传到服务器使用C# (Framework 4),以下是我的代码.

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();  

zip文件上传成功,但是当我尝试从服务器(手动)打开zip文件时,它显示Unexpected end of archive错误.
对于我正在使用的文件压缩Ionic.zip dll.在传输zip文件之前,我能够成功提取.

任何帮助赞赏.谢谢.

Answer 1

这就是问题:

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

StreamReader(和任何TextReader)用于文本数据.zip文件不是文本数据.

只需使用:

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

这样你就不会将二进制数据视为文本,因此它不应该被破坏.

或者,不要单独将它们全部加载到内存中 - 只需流式传输数据:

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

另请注意,您应该使用using所有这些流的语句,而不是仅仅调用Close- 这样即使抛出异常,资源也会被处理掉.