private async Task UploadFileAsync(FluentFTP.FtpClient client, string remotePath, StorageFile localFile, CancellationToken token, IProgress <double> progress)
{
await semaphore.WaitAsync();
try
{
string remoteDirectory = Path.GetDirectoryName(remotePath);
string remoteFileName = Path.GetFileName(remotePath);
while (!(await client.DirectoryExistsAsync(remoteDirectory)))
{
string dir = Path.GetFileName(remoteDirectory);
remoteDirectory = Path.GetDirectoryName(remoteDirectory);
remoteFileName = Path.Combine(dir, remoteFileName);
}
await client.SetWorkingDirectoryAsync(remoteDirectory);
using (var stream = await localFile.OpenStreamForReadAsync())
{
await client.UploadAsync(stream, remoteFileName, FluentFTP.FtpExists.Overwrite, true, token, progress);
}
}
finally
{
client.Dispose();
semaphore.Release();
}
}
public void Dispose()
{
if (_FtpClient == null)
{
return;
}
_FtpClient.Dispose();
}
private async Task DownloadFileAsync(FluentFTP.FtpClient client, string remotePath, StorageFile localFile, CancellationToken token, IProgress <double> progress)
{
await semaphore.WaitAsync();
try
{
string remoteDirectory = Path.GetDirectoryName(remotePath);
string remoteFileName = Path.GetFileName(remotePath);
await client.SetWorkingDirectoryAsync(remoteDirectory);
using (var stream = await localFile.OpenStreamForWriteAsync())
{
await client.DownloadAsync(stream, remoteFileName, token, progress);
}
}
finally
{
client.Dispose();
semaphore.Release();
}
}
/// <summary>
/// 导航到指定的地址。需要登录时自动弹出登录界面。导航失败时，自动导航到失败页面。
/// 不抛出异常。
/// </summary>
/// <param name="address">要导航到的地址</param>
/// <returns>导航是否成功</returns>
private async Task <bool> NavigateAsync(Uri address)
{
await ftpSemaphore.WaitAsync();
try
{
errorMessage.Visibility = Visibility.Collapsed;
progressBar.Visibility = Visibility.Visible;
progressBar.IsIndeterminate = true;
currentAddress = address;
// 显示新的地址
UriBuilder uriBuilder = new UriBuilder(currentAddress);
uriBuilder.UserName = string.Empty;
uriBuilder.Password = string.Empty;
addressBox.Text = uriBuilder.Uri.ToString();
// 不是ftp协议则抛出异常
if (address.Scheme != "ftp" && address.Scheme != "ftps")
{
throw new InvalidOperationException("只支持ftp协议");
}
// Host改变时重新连接
if (client == null)
{
client = CreateFtpClient(address, GetCredential(address.UserInfo), address.Scheme == "ftps");
await FtpConnectAsync(client);
}
else if (client.Host != address.Host ||
(client.EncryptionMode != FluentFTP.FtpEncryptionMode.None && address.Scheme == "ftp") ||
(client.EncryptionMode != FluentFTP.FtpEncryptionMode.Explicit && address.Scheme == "ftps") ||
(client.Port != 21 && address.Port < 0) ||
(client.Port != address.Port && address.Port >= 0) ||
!string.IsNullOrEmpty(address.UserInfo))
{
client.Disconnect();
client.Dispose();
client = CreateFtpClient(address, GetCredential(address.UserInfo), address.Scheme == "ftps");
await FtpConnectAsync(client);
}
// FTP路径可能包含#号，#号后面的内容会被归入Fragment。
string remotePath = address.LocalPath + address.Fragment;
listItemsVM.Clear();
foreach (var item in (await client.GetListingAsync(remotePath)).OrderBy(x => x.Name))
{
listItemsVM.Add(await FtpListItemViewModel.FromFtpListItemAsync(item));
}
using (Data.HistoryContext db = new Data.HistoryContext())
{
Data.HistoryEntry h = new Data.HistoryEntry
{
Time = DateTimeOffset.Now,
Url = uriBuilder.Uri.ToString()
};
await db.AddAsync(h);
await db.SaveChangesAsync();
}
return(true);
}
catch (FluentFTP.FtpCommandException exception)
{
if (exception.CompletionCode == "530")
{
errorMessage.Text = "认证失败，请尝试登录。";
loginButton.Flyout.ShowAt(loginButton);
loginErrorMessage.Visibility = Visibility.Visible;
}
else
{
errorMessage.Text = string.Format(
"发生错误，FTP返回代码：{0}。详细信息：\n{1}", exception.CompletionCode, exception.Message);
}
errorMessage.Visibility = Visibility.Visible;
listItemsVM.Clear();
return(false);
}
catch (Exception exception)
{
errorMessage.Text = string.Format("发生错误。详细信息：\n{0}", exception.Message);
errorMessage.Visibility = Visibility.Visible;
listItemsVM.Clear();
return(false);
}
finally
{
progressBar.Visibility = Visibility.Collapsed;
ftpSemaphore.Release();
}
}
public void Dispose()
{
_client.Dispose();
}
public void Dispose()
{
ftp?.Dispose();
ftp = null;
}
