public async Task OnCFindRequestAsync_Pending_ShouldRespond()
{
var port = Ports.GetNext();
using (DicomServer.Create <PendingAsyncDicomCFindProvider>(port, logger: _logger.IncludePrefix("DicomServer")))
{
var client = new Client.DicomClient("127.0.0.1", port, false, "SCU", "ANY-SCP")
{
Logger = _logger.IncludePrefix(typeof(DicomClient).Name)
};
var responses = new ConcurrentQueue <DicomCFindResponse>();
DicomRequest.OnTimeoutEventArgs timeout = null;
var request = new DicomCFindRequest(DicomQueryRetrieveLevel.Study)
{
OnResponseReceived = (req, res) => responses.Enqueue(res),
OnTimeout = (sender, args) => timeout = args
};
await client.AddRequestAsync(request).ConfigureAwait(false);
await client.SendAsync().ConfigureAwait(false);
Assert.Collection(
responses,
response1 => Assert.Equal(DicomStatus.Pending, response1.Status),
response2 => Assert.Equal(DicomStatus.Pending, response2.Status),
response3 => Assert.Equal(DicomStatus.Success, response3.Status)
);
Assert.Null(timeout);
}
}
public async Task AcceptStoreContexts()
{
int port = Ports.GetNext();
using (DicomServer.Create <AcceptOnlyEchoStoreProvider>(port))
{
var echoReq = new DicomCEchoRequest();
DicomStatus echoStatus = DicomStatus.Pending;
echoReq.OnResponseReceived += (req, resp) => echoStatus = resp.Status;
var storeReq = new DicomCStoreRequest(@".\Test Data\CT1_J2KI");
DicomStatus storeStatus = DicomStatus.Pending;
storeReq.OnResponseReceived += (req, resp) => storeStatus = resp.Status;
var filmSession = new FilmSession(DicomUID.BasicFilmSession, DicomUID.Generate());
var printReq = new DicomNCreateRequest(filmSession.SOPClassUID, filmSession.SOPInstanceUID);
DicomStatus printStatus = DicomStatus.Pending;
printReq.OnResponseReceived += (req, resp) => printStatus = resp.Status;
var client = new Client.DicomClient("127.0.0.1", port, false, "SCU", "ANY-SCP");
await client.AddRequestsAsync(echoReq, storeReq, printReq);
await client.SendAsync();
Assert.Equal(DicomStatus.Success, echoStatus);
Assert.Equal(DicomStatus.Success, storeStatus);
Assert.Equal(DicomStatus.SOPClassNotSupported, printStatus);
}
}
public async Task DicomClientSend_ToAcceptedAssociation_ShouldSendRequest()
{
var port = Ports.GetNext();
using (DicomServer.Create <DicomClientTest.MockCEchoProvider>(port))
{
var locker = new object();
var expected = DicomStatus.Success;
DicomStatus actual = null;
var client = new Dicom.Network.Client.DicomClient("localhost", port, false, "SCU", "ANY-SCP");
await client.AddRequestAsync(
new DicomCEchoRequest
{
OnResponseReceived = (rq, rsp) =>
{
lock (locker) actual = rsp.Status;
}
}).ConfigureAwait(false);
await client.SendAsync().ConfigureAwait(false);
Assert.Equal(expected, actual);
}
}
public async Task DicomClientSend_ToRejectedAssociation_ShouldNotSendRequest()
{
var port = Ports.GetNext();
using (DicomServer.Create <DicomClientTest.MockCEchoProvider>(port))
{
var locker = new object();
DicomStatus status = null;
var client = new Dicom.Network.Client.DicomClient("localhost", port, false, "SCU", "WRONG-SCP");
await client.AddRequestAsync(
new DicomCEchoRequest
{
OnResponseReceived = (rq, rsp) =>
{
lock (locker) status = rsp.Status;
}
}).ConfigureAwait(false);
try
{
await client.SendAsync().ConfigureAwait(false);
}
catch
{
}
Assert.Null(status);
}
}
/// <summary>
/// Blocks until the request is received so calling code doesn't have to deal with asynchrony (see the EventWaitHandle in TrySend).
/// Only the timeout is applied no Throtelling, the client is unreleased on return
/// </summary>
/// <param name="client"></param>
/// <param name="token"></param>
#region SendRequest
public void SendRequest(DicomClient client, CancellationToken token)
{
_listener.OnNotify(this, new NotifyEventArgs(ProgressEventType.Information, "Sending request to " + _dicomConfiguration.RemoteAetTitle + " at " + _dicomConfiguration.RemoteAetUri.Host + ":" + _dicomConfiguration.RemoteAetUri.Port));
bool completed;
try
{
completed = client.SendAsync(token)
.Wait(_dicomConfiguration.TransferTimeOutInMilliseconds + 1000, token);
}
catch (Exception ex)
{
OnRequestException?.Invoke(ex);
throw new Exception("Error when attempting to send DICOM request: " + ex.Message, ex);
}
if (completed)
{
OnRequestSucess?.Invoke();
}
else
{
OnRequestTimeout?.Invoke();
}
}
public async Task OnCStoreRequestAsync_PreferedTransfersyntax()
{
var port = Ports.GetNext();
using (DicomServer.Create <AsyncDicomCStoreProviderPreferingUncompressedTS>(port, logger: _logger.IncludePrefix("DicomServer")))
{
var client = new Client.DicomClient("127.0.0.1", port, false, "SCU", "ANY-SCP")
{
Logger = _logger.IncludePrefix(typeof(DicomClient).Name)
};
int numberOfContexts = 0;
DicomTransferSyntax accpetedTS = null;
// create a request with a jpeg-encoded file
var request = new DicomCStoreRequest(@"./Test Data/CT1_J2KI");
client.AssociationAccepted += (sender, e) =>
{
numberOfContexts = e.Association.PresentationContexts.Count;
accpetedTS = e.Association.PresentationContexts.First().AcceptedTransferSyntax;
};
await client.AddRequestAsync(request).ConfigureAwait(false);
await client.SendAsync().ConfigureAwait(false);
Assert.Equal(2, numberOfContexts); // one for the jpeg2k TS and one for the mandatory ImplicitLittleEndian
Assert.Equal(DicomTransferSyntax.JPEG2000Lossy, accpetedTS);
}
}
public async Task OnCFindRequestAsync_ImmediateSuccess_ShouldRespond()
{
var port = Ports.GetNext();
using (DicomServer.Create <ImmediateSuccessAsyncDicomCFindProvider>(port, logger: _logger.IncludePrefix("DicomServer")))
{
var client = new Client.DicomClient("127.0.0.1", port, false, "SCU", "ANY-SCP")
{
Logger = _logger.IncludePrefix(typeof(DicomClient).Name)
};
DicomCFindResponse response = null;
DicomRequest.OnTimeoutEventArgs timeout = null;
var request = new DicomCFindRequest(DicomQueryRetrieveLevel.Study)
{
OnResponseReceived = (req, res) => response = res,
OnTimeout = (sender, args) => timeout = args
};
await client.AddRequestAsync(request).ConfigureAwait(false);
await client.SendAsync().ConfigureAwait(false);
Assert.NotNull(response);
Assert.Equal(DicomStatus.Success, response.Status);
Assert.Null(timeout);
}
}
/// <summary>
/// Throttle requests using W(O) = mO(t) + c where W is the wait period, O is the opertaion duration, m and c are positive constants
/// Sends requests added to the client is unreleased at the end of this request send.
/// </summary>
///
#region ThrottleRequest
public void ThrottleRequest(DicomClient client, CancellationToken cancellationToken)
{
var transferTimer = new Stopwatch();
transferTimer.Start();
SendRequest(client, cancellationToken);
transferTimer.Stop();
//valuein mills
var delay = _dicomConfiguration.RequestCooldownInMilliseconds;
if (delay > 0)
{
_listener.OnNotify(this, new NotifyEventArgs(ProgressEventType.Information, "Requests sleeping for " + delay / 1000 + "seconds"));
Task.Delay(delay, cancellationToken).Wait(cancellationToken);
}
}
public async Task DicomClientSend_StorePart10File_ShouldSucceed()
{
var port = Ports.GetNext();
using (var server = DicomServer.Create <CStoreScp>(port))
{
server.Logger = _logger.IncludePrefix("CStoreScp");
var file = DicomFile.Open(@".\Test Data\CT-MONO2-16-ankle");
var client = new Dicom.Network.Client.DicomClient("127.0.0.1", port, false, "SCU", "SCP")
{
Logger = _logger.IncludePrefix("DicomClient")
};
await client.AddRequestAsync(new DicomCStoreRequest(file)).ConfigureAwait(false);
var exception = await Record.ExceptionAsync(async() => await client.SendAsync());
Assert.Null(exception);
}
}
public async Task SendMaxPDU()
{
var port = Ports.GetNext();
uint serverPduLength = 400000;
uint clientPduLength = serverPduLength / 2;
using (var server = DicomServer.Create <DicomCEchoProvider>(port, null, new DicomServiceOptions {
MaxPDULength = serverPduLength
}))
{
uint serverPduInAssociationAccepted = 0;
var client = new Client.DicomClient("127.0.0.1", port, false, "SCU", "ANY-SCP");
client.Options = new DicomServiceOptions {
MaxPDULength = clientPduLength
}; // explicitly choose a different value
await client.AddRequestAsync(new DicomCEchoRequest());
client.AssociationAccepted += (sender, e) => serverPduInAssociationAccepted = e.Association.MaximumPDULength;
await client.SendAsync();
Assert.Equal(serverPduLength, serverPduInAssociationAccepted);
}
}
public override SMIDataChunk DoGetChunk(ICacheFetchRequest cacheRequest, IDataLoadEventListener listener, GracefulCancellationToken cancellationToken)
{
listener.OnNotify(this, new NotifyEventArgs(ProgressEventType.Information, $"PACSSource version is {typeof(PACSSource).Assembly.GetName().Version}. Assembly is {typeof(PACSSource).Assembly} "));
listener.OnNotify(this, new NotifyEventArgs(ProgressEventType.Information, $"Fo-Dicom version is {typeof(DicomClient).Assembly.GetName().Version}. Assembly is {typeof(DicomClient).Assembly} "));
var dicomConfiguration = GetConfiguration();
var requestSender = new DicomRequestSender(dicomConfiguration, listener);
var dateFrom = Request.Start;
var dateTo = Request.End;
CachingSCP.LocalAet = LocalAETitle;
CachingSCP.Listener = listener;
if (PatientIdWhitelistColumnInfo != null && !IgnoreWhiteList)
{
GetWhitelist(listener);
}
//temp dir
var cacheDir = new LoadDirectory(Request.CacheProgress.LoadProgress.LoadMetadata.LocationOfFlatFiles).Cache;
var cacheLayout = new SMICacheLayout(cacheDir, new SMICachePathResolver(Modality));
Chunk = new SMIDataChunk(Request)
{
FetchDate = dateFrom,
Modality = Modality,
Layout = cacheLayout
};
ConcurrentBag <StudyToFetch> studiesToOrder = new ConcurrentBag <StudyToFetch>();
CachingSCP.OnEndProcessingCStoreRequest = (storeRequest, storeResponse) =>
{
SaveSopInstance(storeRequest, cacheLayout, listener);
listener.OnNotify(this,
new NotifyEventArgs(ProgressEventType.Debug,
"Stored sopInstance" + storeRequest.SOPInstanceUID.UID));
};
//helps with tyding up resources if we abort or through an exception and neatly avoids -> Access to disposed closure
using (var server = (DicomServer <CachingSCP>)DicomServer.Create <CachingSCP>(dicomConfiguration.LocalAetUri.Port))
{
DicomClient client = new DicomClient(dicomConfiguration.RemoteAetUri.Host, dicomConfiguration.RemoteAetUri.Port, false, dicomConfiguration.LocalAetTitle, dicomConfiguration.RemoteAetTitle);
try
{
// Find a list of studies
#region Query
listener.OnNotify(this,
new NotifyEventArgs(ProgressEventType.Information,
"Requesting Studies from " + dateFrom + " to " + dateTo));
var request = CreateStudyRequestByDateRangeForModality(dateFrom, dateTo, Modality);
request.OnResponseReceived += (req, response) =>
{
if (Filter(_whitelist, response))
{
studiesToOrder.Add(new StudyToFetch(response.Dataset.GetSingleValue <string>(DicomTag.StudyInstanceUID)));
}
};
requestSender.ThrottleRequest(request, client, cancellationToken.AbortToken);
listener.OnNotify(this,
new NotifyEventArgs(ProgressEventType.Debug,
"Total filtered studies for " + dateFrom + " to " + dateTo + "is " + studiesToOrder.Count));
#endregion
//go and get them
#region Retrieval
var transferStopwatch = new Stopwatch();
StudyToFetch current;
int consecutiveFailures = 0;
//While we have things to fetch
while (studiesToOrder.TryTake(out current))
{
transferStopwatch.Restart();
//delay value in mills
if (dicomConfiguration.TransferCooldownInMilliseconds != 0)
{
listener.OnNotify(this,
new NotifyEventArgs(ProgressEventType.Information,
"Transfers sleeping for " + dicomConfiguration.TransferCooldownInMilliseconds / 1000 + "seconds"));
Task.Delay(dicomConfiguration.TransferCooldownInMilliseconds, cancellationToken.AbortToken).Wait(cancellationToken.AbortToken);
}
bool done = false;
//Build fetch command that Study
var cMoveRequest = CreateCMoveByStudyUid(LocalAETitle, current.StudyUid, listener);
//Register callbacks
cMoveRequest.OnResponseReceived += (requ, response) =>
{
listener.OnNotify(this,
new NotifyEventArgs(ProgressEventType.Debug,
$"Got {response.Status.State} response for {requ}. Items remaining {response.Remaining}"));
switch (response.Status.State)
{
case DicomState.Pending:
case DicomState.Warning:
// ignore
break;
case DicomState.Cancel:
case DicomState.Failure:
consecutiveFailures++;
if (current.RetryCount < MaxRetries)
{
// put it back in the bag with a increased retry count
current.RetryCount++;
studiesToOrder.Add(current);
}
// final state
done = true;
break;
case DicomState.Success:
// final state
consecutiveFailures = 0;
done = true;
break;
}
};
//send the command to the server
//tell user what we are sending
listener.OnNotify(this, new NotifyEventArgs(ProgressEventType.Information, CMoveRequestToString(cMoveRequest, current.RetryCount + 1)));
//do not use requestSender.ThrottleRequest(cMoveRequest, cancellationToken);
//TODO is there any need to throtttle this request given its lifetime
requestSender.ThrottleRequest(cMoveRequest, client, cancellationToken.AbortToken);
//enforce a minimum timeout
var swStudyTransfer = Stopwatch.StartNew();
bool hasTransferTimedOut = false;
do
{
Task.Delay(Math.Max(100, dicomConfiguration.TransferPollingInMilliseconds), cancellationToken.AbortToken)
.Wait(cancellationToken.AbortToken);
hasTransferTimedOut = swStudyTransfer.ElapsedMilliseconds > dicomConfiguration.TransferTimeOutInMilliseconds;
}while(!done && !hasTransferTimedOut);
// Study has finished being fetched (or timed out)
if (hasTransferTimedOut)
{
listener.OnNotify(this, new NotifyEventArgs(ProgressEventType.Information, "Abandonning fetch of study " + current.StudyUid));
}
if (consecutiveFailures > 5)
{
throw new Exception("Too many consecutive failures, giving up");
}
// 1 failure = study not available, 2 failures = system is having a bad day?
if (consecutiveFailures > 1)
{
//wait 4 minutes then 6 minutes then 8 minutes, eventually server will start responding again?
int sleepFor = consecutiveFailures * 2 * 60_000;
listener.OnNotify(this, new NotifyEventArgs(ProgressEventType.Warning, $"Sleeping for {sleepFor}ms due to {consecutiveFailures} consecutive failures"));
Task.Delay(sleepFor, cancellationToken.AbortToken)
.Wait(cancellationToken.AbortToken);
}
}
#endregion
}
finally
{
server.Stop();
}
}
return(Chunk);
}
public Task OnReceiveAssociationAcceptAsync(DicomAssociation association)
{
return(DicomClient.OnReceiveAssociationAcceptAsync(association));
}
/// <summary>
/// Blocks until the request is received so calling code doesn't have to deal with asynchrony (see the EventWaitHandle in TrySend).
/// Only the timeout is applied no Throtelling
/// </summary>
/// <param name="dicomRequest"></param>
#region SendRequest
private void SendRequest(DicomRequest dicomRequest, CancellationToken token)
{
var client = new DicomClient(_dicomConfiguration.RemoteAetUri.Host, _dicomConfiguration.RemoteAetUri.Port, false, _dicomConfiguration.LocalAetTitle, _dicomConfiguration.RemoteAetTitle);
SendRequest(dicomRequest, client, token);
}
public Task OnReceiveAssociationRejectAsync(DicomRejectResult result, DicomRejectSource source, DicomRejectReason reason)
{
return(DicomClient.OnReceiveAssociationRejectAsync(result, source, reason));
}
/// <summary>
/// Throttle requests using W(O) = mO(t) + c where W is the wait period, O is the opertaion duration, m and c are positive constants
/// The request is added to the client which is unreleased at the end of this request send.
/// </summary>
///
#region ThrottleRequest
public void ThrottleRequest(DicomRequest dicomRequest, DicomClient client, CancellationToken cancellationToken)
{
client.AddRequestAsync(dicomRequest).Wait(cancellationToken);
ThrottleRequest(client, cancellationToken);
}
public Task OnReceiveAssociationReleaseResponseAsync()
{
return(DicomClient.OnReceiveAssociationReleaseResponseAsync());
}
/// <summary>
/// Blocks until the request is received so calling code doesn't have to deal with asynchrony (see the EventWaitHandle in TrySend).
/// Only the timeout is applied no Throtelling, the client is unreleased on return
/// </summary>
/// <param name="dicomRequest"></param>
/// <param name="client"></param>
#region SendRequest
public void SendRequest(DicomRequest dicomRequest, DicomClient client, CancellationToken token)
{
client.AddRequestAsync(dicomRequest).Wait(token);
SendRequest(client, token);
}
public Task OnConnectionClosedAsync(Exception exception)
{
return(DicomClient.OnConnectionClosedAsync(exception));
}
public Task OnReceiveAbortAsync(DicomAbortSource source, DicomAbortReason reason)
{
return(DicomClient.OnReceiveAbortAsync(source, reason));
}
public static Task <IDicomClientState> TransitionToSendingRequestsState(this DicomClient dicomClient,
IInitialisationWithAssociationParameters parameters, DicomClientCancellation cancellation)
{
return(TransitionToSendingRequestsState(dicomClient, parameters, parameters.Association, cancellation));
}
protected override Task OnSendQueueEmptyAsync()
{
return(DicomClient.OnSendQueueEmptyAsync());
}
public static Task <IDicomClientState> TransitionToIdleState(this DicomClient dicomClient, DicomClientCancellation cancellation)
{
var idleState = new DicomClientIdleState(dicomClient);
return(dicomClient.Transition(idleState, cancellation));
}
public Task OnRequestCompletedAsync(DicomRequest request, DicomResponse response)
{
return(DicomClient.OnRequestCompletedAsync(request, response));
}
public Task <DicomResponse> OnNEventReportRequestAsync(DicomNEventReportRequest request)
{
return(DicomClient.OnNEventReportRequestAsync(request));
}
public Task <DicomResponse> OnCStoreRequestAsync(DicomCStoreRequest request)
{
return(DicomClient.OnCStoreRequestAsync(request));
}
public Task OnRequestTimedOutAsync(DicomRequest request, TimeSpan timeout)
{
return(DicomClient.OnRequestTimedOutAsync(request, timeout));
}
public static Task <IDicomClientState> TransitionToConnectState(this DicomClient dicomClient, DicomClientCancellation cancellation)
{
var connectState = new DicomClientConnectState(dicomClient);
return(dicomClient.Transition(connectState, cancellation));
}
public async Task ClientHandleNEventReport_SynchronousEvent()
{
var port = Ports.GetNext();
using (DicomServer.Create <SimpleStorageComitmentProvider>(port))
{
DicomStatus status = null;
int verifiedInstances = 0;
DateTime stampNActionResponse = DateTime.MinValue;
DateTime stampNEventReportRequest = DateTime.MinValue;
var dicomClient = new Client.DicomClient("127.0.0.1", port, false, "SCU", "ANY-SCP");
var nActionDicomDataSet = new DicomDataset
{
{ DicomTag.TransactionUID, DicomUIDGenerator.GenerateDerivedFromUUID().UID },
{
DicomTag.ReferencedSOPSequence,
new DicomDataset()
{
{ DicomTag.ReferencedSOPClassUID, "1.2.840.10008.5.1.4.1.1.1" },
{ DicomTag.ReferencedSOPInstanceUID, "1.3.46.670589.30.2273540226.4.54" }
},
new DicomDataset()
{
{ DicomTag.ReferencedSOPClassUID, "1.2.840.10008.5.1.4.1.1.1" },
{ DicomTag.ReferencedSOPInstanceUID, "1.3.46.670589.30.2273540226.4.59" }
}
}
};
var nActionRequest = new DicomNActionRequest(DicomUID.StorageCommitmentPushModel,
DicomUID.StorageCommitmentPushModel, 1)
{
Dataset = nActionDicomDataSet,
OnResponseReceived = (DicomNActionRequest request, DicomNActionResponse response) =>
{
status = response.Status;
stampNActionResponse = DateTime.Now;
},
};
await dicomClient.AddRequestAsync(nActionRequest);
dicomClient.OnNEventReportRequest = (eventReq) =>
{
var refSopSequence = eventReq.Dataset.GetSequence(DicomTag.ReferencedSOPSequence);
foreach (var item in refSopSequence.Items)
{
verifiedInstances += 1;
}
stampNEventReportRequest = DateTime.Now;
return(Task.FromResult(new DicomNEventReportResponse(eventReq, DicomStatus.Success)));
};
dicomClient.AssociationLingerTimeoutInMs = (int)TimeSpan.FromSeconds(5).TotalMilliseconds;
await dicomClient.SendAsync().ConfigureAwait(false);
Assert.Equal(DicomStatus.Success, status);
Assert.Equal(2, verifiedInstances);
Assert.True(stampNActionResponse < stampNEventReportRequest);
}
}
public static Task <IDicomClientState> TransitionToCompletedState(this DicomClient dicomClient, IInitialisationWithConnectionParameters parameters,
DicomClientCancellation cancellation)
{
return(TransitionToCompletedState(dicomClient, parameters.Connection, cancellation));
}
public DicomClientConnection(DicomClient dicomClient, INetworkStream networkStream)
: base(networkStream, dicomClient.FallbackEncoding, dicomClient.Logger)
{
DicomClient = dicomClient;
NetworkStream = networkStream;
}