从Windows Phone 8在FTP服务器上上载文件时引发异常

本文关键字：文件 上载 异常 服务器 Phone Windows FTP | 更新日期: 2023-09-27 17:59:40

我想在FTP服务器上上传一个视频文件，我的所有搜索结果都以MSDN managzine文章《在Windows Phone 8中添加FTP支持》结束。它有很棒的例子&图书馆我尝试了两个FTP URL，一个是Mozilla存储库&另一个是我的机密URL。对我来说什么都不管用，只是抛出了一个例外。我在一个名为File Downloader的应用程序中尝试了我的FTP URL，它运行正常。实验细节&输出windows日志如下所示。

因此，任何人都可以建议我应该对那个图书馆做些什么改变？是否有其他可用的工作库或任何其他方式将文件上传到FTP？

Exception is thrown in file FtpClient.cs, event FtpClientSocket_DataReceived(...), at line "await PrepareDataChannelAsync(Response);" [Line # 253]
ftp.mozilla.org
System.Exception: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. (Exception from HRESULT: 0x8007274C)
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at WinPhoneFtp.FtpService.FtpClient.<PrepareDataChannelAsync>d__2b.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at WinPhoneFtp.FtpService.FtpClient.<FtpClientSocket_DataReceived>d__3.MoveNext()
Output log
FTP Server IP Address: ftp.mozilla.org with port 21
FTP Command Channel Initailized
FTPServer -> 220-
220-   ftp.mozilla.org / archive.mozilla.org - files are in /pub/mozilla.org
220-
220-   Notice: This server is the only place to obtain nightly builds and needs to
220-   remain available to developers and testers. High bandwidth servers that
220-   contain the public release files are available at ftp://releases.mozilla.org/
220-   If you need to link to a public release, please link to the release server,
220-   not here. Thanks!
220-
220-   Attempts to download high traffic release files f
FTPServer -> rom this server will get a
220-   "550 Permission denied." response.
220 
FTPClient -> USER anonymous
FTPServer -> 331 Please specify the password.
FTPClient -> PASS m@m.com
FTPServer -> 230-
230-   ftp.mozilla.org / archive.mozilla.org - files are in /pub/mozilla.org
230-
230-   Notice: This server is the only place to obtain nightly builds and needs to
230-   remain available to developers and testers. High bandwidth servers that
230-   contain the public release files are available at ftp://releases.mozilla.org/
230-   If you need to link to a public release, please link to the release server,
230-   not here. Thanks!
230-
230-   Attempts to download high traffic release files f
FTPClient -> PWD
FTPServer -> rom this server will get a
230-   "550 Permission denied." response.
230 Login successful.
FTPClient -> PASV
FTPServer -> 257 "/"
FTPServer -> 227 Entered Passive Mode (63,245,215,46,199,76)
FTP Data Channel IPAddress: 63.245.215.46, Port: 50951
A first chance exception of type 'System.Exception' occurred in mscorlib.ni.dll
An exception of type 'System.Exception' occurred in mscorlib.ni.dll and wasn't handled before a managed/native boundary
A first chance exception of type 'System.Exception' occurred in mscorlib.ni.dll
========================================================================================================================
Confidential FTP URL which required authentication
System.Exception: No connection could be made because the target machine actively refused it. (Exception from HRESULT: 0x8007274D)
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at WinPhoneFtp.FtpService.FtpClient.<PrepareDataChannelAsync>d__2b.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at WinPhoneFtp.FtpService.FtpClient.<FtpClientSocket_DataReceived>d__3.MoveNext()
Output log
FTP Server IP Address: --CONFIDENTIAL-- with port 21
FTP Command Channel Initailized
FTPServer -> 220 (vsFTPd 2.0.5)
FTPClient -> USER --CONFIDENTIAL--
FTPServer -> 331 Please specify the password.
FTPClient -> PASS --CONFIDENTIAL--
FTPServer -> 230 Login successful.
FTPClient -> PWD
FTPClient -> PASV
FTPServer -> 257 "/"
FTPServer -> 227 Entering Passive Mode (173,193,219,177,156,29)
FTP Data Channel IPAddress: 173.193.219.177, Port: 39938
A first chance exception of type 'System.Exception' occurred in mscorlib.ni.dll
An exception of type 'System.Exception' occurred in mscorlib.ni.dll and wasn't handled before a managed/native boundary
A first chance exception of type 'System.Exception' occurred in mscorlib.ni.dll

我还尝试了以下给定的代码，它在Windows 8上工作，但在Windows Phone 8 上不工作

var ftpURL = "ftp://ftp.url.com";
var request = WebRequest.Create(ftpURL + "/" + file_name.ext);
request.Credentials = new NetworkCredential("uname", "pwd");
request.Method = "STOR";
byte[] fileBytes = null;
using (var stream = await objStorageFile.OpenReadAsync())
{
    fileBytes = new byte[stream.Size];
    using (var reader = new DataReader(stream))
    {
        await reader.LoadAsync((uint)stream.Size);
        reader.ReadBytes(fileBytes);
    }
}
var requestStream = request.BeginGetRequestStream(async a =>
{
    var requestStreamEnd = request.EndGetRequestStream(a);
    await requestStreamEnd.WriteAsync(fileBytes, 0, fileBytes.Length);
    await requestStreamEnd.FlushAsync();
}, request);
var respo = request.BeginGetResponse(b =>
{
    var res = request.EndGetResponse(b);
    var aa = res.Headers;
}, null);

从Windows Phone 8在FTP服务器上上载文件时引发异常

将FtpClient类方法中的PrepareDataChannelAsync（String channelInfo）替换为以下方法：

private async Task PrepareDataChannelAsync(String channelInfo)
    {
        channelInfo = channelInfo.Remove(0, "227 Entering Passive Mode".Length);
        int start = channelInfo.IndexOf("(") + 1;
        int length = channelInfo.IndexOf(")") - start;
        channelInfo = channelInfo.Substring(start, length);
        String[] Splits = channelInfo.Split(new char[] { ',', ' ', }, StringSplitOptions.RemoveEmptyEntries);
        String Ipaddr = String.Join(".", Splits, 0, 4);
        //Configure the IP Address
        //Calculate the Data Port
        Int32 port = Convert.ToInt32(Splits[4]);
        port = (port * 256) + Convert.ToInt32(Splits[5]);
        logger.AddLog(String.Format("FTP Data Channel IPAddress: {0}, Port: {1}", Ipaddr, port));
        FtpDataChannel = new StreamSocket();
        await FtpDataChannel.ConnectAsync(new Windows.Networking.HostName(Ipaddr), port.ToString());
        logger.AddLog("FTP Data Channel connected");
    }
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