private void HandleNetworkError(NetworkException error)
{
if (this.OnNetworkError != null)
{
this.OnNetworkError(error);
}
}
public static string ToString(Exception exception)
{
return(exception switch
{
ServerException _ => "抱歉，服务器错误",
NetworkException _ => "抱歉，无法连接到Internet",
_ => "抱歉，出错啦！"
});
public async Task ConnectAsync_TimedOut_ThrowsNetworkException()
{
using SocketsConnectionFactory factory = new SocketsConnectionFactory(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPEndPoint doesNotExist = new IPEndPoint(IPAddress.Parse("1.2.3.4"), 23);
NetworkException ex = await Assert.ThrowsAsync <NetworkException>(() => factory.ConnectAsync(doesNotExist).AsTask());
Assert.Equal(NetworkError.TimedOut, ex.NetworkError);
}
public static void Create_AllErrorCodes_Success()
{
foreach (NetworkError error in Enum.GetValues(typeof(NetworkError)))
{
NetworkException e = new NetworkException(error);
Assert.Equal(error, e.NetworkError);
Assert.Null(e.InnerException);
Assert.NotNull(e.Message);
}
}
public static void Create_InnerExceptionAndMessage_Success()
{
const string Message = "Hello";
Exception inner = new Exception();
NetworkException e = new NetworkException(Message, NetworkError.Unknown, inner);
Assert.Equal(inner, e.InnerException);
Assert.Equal(Message, e.Message);
}
public async Task ConnectAsync_WhenRefused_ThrowsNetworkException()
{
using Socket notListening = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
int port = notListening.BindToAnonymousPort(IPAddress.Loopback);
var endPoint = new IPEndPoint(IPAddress.Loopback, port);
using SocketsConnectionFactory factory = new SocketsConnectionFactory(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
NetworkException ex = await Assert.ThrowsAsync <NetworkException>(() => factory.ConnectAsync(endPoint).AsTask());
Assert.Equal(NetworkError.ConnectionRefused, ex.NetworkError);
}
public async Task ConnectAsync_WhenHostNotFound_ThrowsNetworkException()
{
using SocketsConnectionFactory factory = new SocketsConnectionFactory(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
// Unassigned as per https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.txt
int unusedPort = 8;
DnsEndPoint endPoint = new DnsEndPoint(System.Net.Test.Common.Configuration.Sockets.InvalidHost, unusedPort);
NetworkException ex = await Assert.ThrowsAsync <NetworkException>(() => factory.ConnectAsync(endPoint).AsTask());
Assert.Equal(NetworkError.HostNotFound, ex.NetworkError);
}
public void EnqueueAnnouncement_WithPeerNotReady_Test()
{
AutoResetEvent executed = new AutoResetEvent(false);
NetworkException exception = null;
_nonInterceptedPeer.IsConnected = false;
Should.Throw <NetworkException>(() =>
_nonInterceptedPeer.EnqueueAnnouncement(new BlockAnnouncement(), ex =>
{
exception = ex;
executed.Set();
}));
}
private static void PrintError(NetworkException exception)
{
if (exception == null)
{
throw new ArgumentNullException(nameof(exception));
}
switch (exception.StatusCode)
{
case 401: Console.WriteLine("Unauthorized"); break;
case 404: Console.WriteLine("Not found"); break;
default: Console.WriteLine("Unexpected error"); break;
}
}
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if (value == null)
{
return(null);
}
var imageName = value switch
{
ServerException _ => "the_internet.gif",
NetworkException _ => "the_internet.gif",
_ => "the_internet.gif",
};
return(ImageSource.FromFile(imageName));
}
/// <summary>
/// Handles the exception.
/// </summary>
/// <param name="ex">The error object.</param>
void HandleException(Exception ex, string additionalMessage, bool terminateOnError)
{
if (ex.InnerException != null)
{
ex = ex.InnerException;
}
bool terminate = terminateOnError;
string msg = null;
if (ex is ObjectDisposedException)
{
terminate = true;
}
else
{
NetworkException ne = ex as NetworkException;
if (ne != null)
{
if (ne.Status == NetworkExceptionStatus.ProtocolError)
{
msg = "Error while transferring data between the client and server. ";
}
else
{
terminate = true;
}
}
}
EventHandler ev;
if (terminate)
{
ev = (s, e) => {
SetResult(Result.Ok);
Finish();
}
}
;
else
{
ev = null;
}
Util.ShowMessage("IMAP Demo", msg + additionalMessage + "Error: " + ex.Message, this, ev);
}
public void EnqueueAnnouncement_ShouldExecuteCallback_Test()
{
AutoResetEvent executed = new AutoResetEvent(false);
NetworkException exception = null;
var called = false;
_nonInterceptedPeer.EnqueueAnnouncement(new BlockAnnouncement(), ex =>
{
exception = ex;
called = true;
executed.Set();
});
executed.WaitOne();
exception.ShouldBeNull();
called.ShouldBeTrue();
}
public void EnqueueBlock_ShouldExecuteCallback_Test()
{
AutoResetEvent executed = new AutoResetEvent(false);
NetworkException exception = null;
bool called = false;
_nonInterceptedPeer.EnqueueBlock(new BlockWithTransactions(), ex =>
{
exception = ex;
called = true;
executed.Set();
});
executed.WaitOne();
exception.ShouldBeNull();
called.ShouldBeTrue();
}
public void EnqueueAnnouncement_WithPeerNotReady_Test()
{
AutoResetEvent executed = new AutoResetEvent(false);
NetworkException exception = null;
bool called = false;
_grpcPeer.IsConnected = false;
Should.Throw <NetworkException>(() =>
_grpcPeer.EnqueueAnnouncement(new BlockAnnouncement(), ex =>
{
exception = ex;
called = true;
executed.Set();
}));
Should.Throw <NetworkException>(() =>
_grpcPeer.EnqueueBlock(new BlockWithTransactions(), ex =>
{
exception = ex;
called = true;
executed.Set();
}));
}
void IExceptionCaught.EmitSignal(object sender, NetworkException ex)
{
_socketDispatcher.EmitExceptionCaughtSignal(sender, ex);
}
private void _client_OnConnectFail(NetworkException error)
{
this._client_OnLogonFailed("连接错误.");
}
/// <summary>
/// Event procedure: Called, if an error occurs at the websocket layer.
/// </summary>
/// <param name="e">Message and optional Exception info</param>
protected override void OnError(ErrorEventArgs e)
{
LastException = new NetworkException(e.Message, e.Exception);
ErrorOccured?.Invoke(e.Message, e.Exception);
}
/// <summary>
/// Event procedure: Called when a error occurs on the websocket layer.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void OnError(object sender, ErrorEventArgs e)
{
LastException = new NetworkException(e.Message, e.Exception);
ErrorOccured?.Invoke(e.Message, e.Exception);
}
private void OnTcpServer_ExceptionCaught(object sender, NetworkException ex)
{
Log.Error(ex, "服务端异常捕获");
}
private void OnExceptionCaught(object sender, NetworkException ex)
{
Log.Error(ex, "Telnet异常捕获");
}
void network_OnError(NetworkException exception)
{
main.status.Text = "Fehler: " + exception.Message;
}
/// <summary> /// 发射异常捕获信号 /// </summary> /// <param name="sender"></param> /// <param name="ex"></param> internal abstract void EmitExceptionCaughtSignal(object sender, NetworkException ex);
public async Task<string> MakeOperationAsync(SupportedModules module, SupportedMethods method, string syscode = "", string resStr = "", string genMod = "", bool forAuth = false)
{
if (IsNetworkAvailable() && (forAuth || await IsValidAccountAsync(forAuth)))
{
PostDataWriter args = new PostDataWriter() { module = module, method = method, cidReq = syscode, resStr = resStr, GenMod = genMod };
String strContent = "";
try
{
strContent = await GetResponseAsync(args);
#if DEBUG
Debug.WriteLine("Call for :" + module + "/" + method + "\nResponse :" + strContent + "\n");
#endif
if (args.method != SupportedMethods.GetPage && strContent.StartsWith("<"))
{
strContent = "";
}
}
catch (Exception ex)
{
LastException = ex;
}
return strContent;
}
else
{
LastException = new NetworkException("Network Unavailable");
return null;
}
}
