public void OnElement_SmallObject_ReturnValueTrue()
{
const string expected = "STEREOTACTIC";
var e = new ManualResetEventSlim(false);
var element = new DicomCodeString(DicomTag.ApplicatorType, expected);
using (var stream = new MemoryStream())
{
var target = new StreamByteTarget(stream);
var writer = new DicomWriter(
DicomTransferSyntax.ExplicitVRLittleEndian,
new DicomWriteOptions { LargeObjectSize = 14 },
target);
writer.OnBeginWalk();
Assert.True(writer.OnElement(element));
e.Wait(100);
stream.Seek(8, SeekOrigin.Begin);
using (var reader = new StreamReader(stream))
{
var actual = reader.ReadToEnd().Trim();
Assert.Equal(expected, actual);
}
}
}
private void OnCompletePreamble(IByteTarget target, object state) {
// recalculate FMI group length as required by standard
_fileMetaInfo.RecalculateGroupLengths();
DicomWriter writer = new DicomWriter(DicomTransferSyntax.ExplicitVRLittleEndian, _options, _target);
DicomDatasetWalker walker = new DicomDatasetWalker(_fileMetaInfo);
walker.BeginWalk(writer, OnCompleteFileMetaInfo, walker);
}
private DicomDataset DeepClone_(DicomDataset dataset)
{
var ms = new MemoryStream();
var target = new StreamByteTarget(ms);
var writer = new DicomWriter(DicomTransferSyntax.ImplicitVRLittleEndian, DicomWriteOptions.Default, target);
var walker = new DicomDatasetWalker(dataset);
walker.Walk(writer);
var clone = new DicomDataset();
var reader = new DicomReader { IsExplicitVR = false };
var byteSource = new ByteBufferByteSource(
new MemoryByteBuffer(ms.ToArray()));
reader.Read(byteSource, new DicomDatasetReaderObserver(clone));
return clone;
}
private void SendNextMessage()
{
while (true)
{
DicomMessage msg;
lock (_lock)
{
if (_msgQueue.Count == 0)
{
if (_pending.Count == 0) OnSendQueueEmpty();
return;
}
if (_sending) return;
if (Association.MaxAsyncOpsInvoked > 0 && _pending.Count >= Association.MaxAsyncOpsInvoked) return;
_sending = true;
msg = _msgQueue.Dequeue();
}
if (msg is DicomRequest) _pending.Add(msg as DicomRequest);
DicomPresentationContext pc = null;
if (msg is DicomCStoreRequest)
{
pc =
Association.PresentationContexts.FirstOrDefault(
x =>
x.Result == DicomPresentationContextResult.Accept && x.AbstractSyntax == msg.SOPClassUID
&& x.AcceptedTransferSyntax == (msg as DicomCStoreRequest).TransferSyntax);
if (pc == null)
pc =
Association.PresentationContexts.FirstOrDefault(
x =>
x.Result == DicomPresentationContextResult.Accept &&
x.AbstractSyntax == msg.SOPClassUID);
}
else
{
pc =
Association.PresentationContexts.FirstOrDefault(
x =>
x.Result == DicomPresentationContextResult.Accept && x.AbstractSyntax == msg.SOPClassUID);
}
if (pc == null)
{
pc = msg.PresentationContext;
}
if (pc == null)
{
_pending.Remove(msg as DicomRequest);
try
{
if (msg is DicomCStoreRequest)
(msg as DicomCStoreRequest).PostResponse(
this,
new DicomCStoreResponse(msg as DicomCStoreRequest, DicomStatus.SOPClassNotSupported));
else if (msg is DicomCEchoRequest)
(msg as DicomCEchoRequest).PostResponse(
this,
new DicomCEchoResponse(msg as DicomCEchoRequest, DicomStatus.SOPClassNotSupported));
else if (msg is DicomCFindRequest)
(msg as DicomCFindRequest).PostResponse(
this,
new DicomCFindResponse(msg as DicomCFindRequest, DicomStatus.SOPClassNotSupported));
else if (msg is DicomCMoveRequest)
(msg as DicomCMoveRequest).PostResponse(
this,
new DicomCMoveResponse(
msg as DicomCMoveRequest,
DicomStatus.SOPClassNotSupported));
//TODO: add N services
}
catch
{
}
Logger.Error(
"No accepted presentation context found for abstract syntax: {sopClassUid}",
msg.SOPClassUID);
}
else
{
var dimse = new Dimse
{
Message = msg,
PresentationContext = pc
};
// force calculation of command group length as required by standard
msg.Command.RecalculateGroupLengths();
if (msg.HasDataset)
{
// remove group lengths as recommended in PS 3.5 7.2
//
// 2. It is recommended that Group Length elements be removed during storage or transfer
// in order to avoid the risk of inconsistencies arising during coercion of data
// element values and changes in transfer syntax.
msg.Dataset.RemoveGroupLengths();
if (msg.Dataset.InternalTransferSyntax != dimse.PresentationContext.AcceptedTransferSyntax)
msg.Dataset =
msg.Dataset.ChangeTransferSyntax(dimse.PresentationContext.AcceptedTransferSyntax);
}
Logger.Info("{logId} -> {dicomMessage}", LogID, msg.ToString(Options.LogDimseDatasets));
try
{
dimse.Stream = new PDataTFStream(this, pc.ID, Association.MaximumPDULength);
var writer = new DicomWriter(
DicomTransferSyntax.ImplicitVRLittleEndian,
DicomWriteOptions.Default,
new StreamByteTarget(dimse.Stream));
dimse.Walker = new DicomDatasetWalker(msg.Command);
dimse.Walker.Walk(writer);
if (dimse.Message.HasDataset)
{
dimse.Stream.IsCommand = false;
writer = new DicomWriter(
dimse.PresentationContext.AcceptedTransferSyntax,
DicomWriteOptions.Default,
new StreamByteTarget(dimse.Stream));
dimse.Walker = new DicomDatasetWalker(dimse.Message.Dataset);
dimse.Walker.Walk(writer);
}
}
catch (Exception e)
{
Logger.Error("Exception sending DIMSE: {@error}", e);
}
finally
{
dimse.Stream.Flush(true).Wait();
dimse.Stream.Dispose();
}
}
lock (_lock) _sending = false;
}
}
private void OnCompleteFileMetaInfo(IAsyncResult result)
{
try
{
DicomDatasetWalker walker;
if (result != null)
{
walker = result.AsyncState as DicomDatasetWalker;
walker.EndWalk(result);
}
DicomTransferSyntax syntax = _fileMetaInfo.TransferSyntax;
if (_options.KeepGroupLengths)
{
// update transfer syntax and recalculate existing group lengths
_dataset.InternalTransferSyntax = syntax;
_dataset.RecalculateGroupLengths(false);
}
else
{
// remove group lengths as suggested in PS 3.5 7.2
//
// 2. It is recommended that Group Length elements be removed during storage or transfer
// in order to avoid the risk of inconsistencies arising during coercion of data
// element values and changes in transfer syntax.
_dataset.RemoveGroupLengths();
}
DicomWriter writer = new DicomWriter(syntax, _options, _target);
walker = new DicomDatasetWalker(_dataset);
walker.BeginWalk(writer, OnCompleteDataset, walker);
}
catch (Exception e)
{
_exception = e;
_async.Set();
}
}
private void OnEndSendCommand(IAsyncResult result) {
var dimse = result.AsyncState as Dimse;
try {
dimse.Walker.EndWalk(result);
dimse.Stream.IsCommand = false;
var writer = new DicomWriter(dimse.PresentationContext.AcceptedTransferSyntax, DicomWriteOptions.Default, new StreamByteTarget(dimse.Stream));
dimse.Walker = new DicomDatasetWalker(dimse.Message.Dataset);
dimse.Walker.BeginWalk(writer, OnEndSendMessage, dimse);
} catch (Exception e) {
Logger.Error("Exception sending DIMSE: {@error}", e);
} finally {
if (!dimse.Message.HasDataset) {
lock (_lock)
_sending = false;
SendNextMessage();
}
}
}
private void SendNextMessage() {
DicomMessage msg;
lock (_lock) {
if (_msgQueue.Count == 0) {
if (_pending.Count == 0)
OnSendQueueEmpty();
return;
}
if (_sending)
return;
if (Association.MaxAsyncOpsInvoked > 0 && _pending.Count >= Association.MaxAsyncOpsInvoked)
return;
_sending = true;
msg = _msgQueue.Dequeue();
}
if (msg is DicomRequest)
_pending.Add(msg as DicomRequest);
DicomPresentationContext pc = null;
if (msg is DicomCStoreRequest) {
pc = Association.PresentationContexts.FirstOrDefault(x => x.Result == DicomPresentationContextResult.Accept && x.AbstractSyntax == msg.SOPClassUID && x.AcceptedTransferSyntax == (msg as DicomCStoreRequest).TransferSyntax);
if (pc == null)
pc = Association.PresentationContexts.FirstOrDefault(x => x.Result == DicomPresentationContextResult.Accept && x.AbstractSyntax == msg.SOPClassUID);
} else {
pc = Association.PresentationContexts.FirstOrDefault(x => x.Result == DicomPresentationContextResult.Accept && x.AbstractSyntax == msg.SOPClassUID);
}
if (pc == null) {
Logger.Error("No accepted presentation context found for abstract syntax: {0}", msg.SOPClassUID);
lock (_lock)
_sending = false;
SendNextMessage();
return;
}
var dimse = new Dimse();
dimse.Message = msg;
dimse.PresentationContext = pc;
// force calculation of command group length as required by standard
msg.Command.RecalculateGroupLengths();
if (msg.HasDataset) {
// remove group lengths as recommended in PS 3.5 7.2
//
// 2. It is recommended that Group Length elements be removed during storage or transfer
// in order to avoid the risk of inconsistencies arising during coercion of data
// element values and changes in transfer syntax.
msg.Dataset.RemoveGroupLengths();
if (msg.Dataset.InternalTransferSyntax != dimse.PresentationContext.AcceptedTransferSyntax)
msg.Dataset = msg.Dataset.ChangeTransferSyntax(dimse.PresentationContext.AcceptedTransferSyntax);
}
Logger.Info("{0} -> {1}", LogID, msg.ToString(Options.LogDimseDatasets));
dimse.Stream = new PDataTFStream(this, pc.ID, Association.MaximumPDULength);
var writer = new DicomWriter(DicomTransferSyntax.ImplicitVRLittleEndian, DicomWriteOptions.Default, new StreamByteTarget(dimse.Stream));
dimse.Walker = new DicomDatasetWalker(msg.Command);
if (dimse.Message.HasDataset)
dimse.Walker.BeginWalk(writer, OnEndSendCommand, dimse);
else
dimse.Walker.BeginWalk(writer, OnEndSendMessage, dimse);
}
/// <summary>
/// Write DICOM file meta information.
/// </summary>
/// <param name="target">Byte target subject to writing.</param>
/// <param name="fileMetaInfo">File meta information.</param>
/// <param name="options">Writer options.</param>
private static void WriteFileMetaInfo(
IByteTarget target,
DicomDataset fileMetaInfo,
DicomWriteOptions options)
{
// recalculate FMI group length as required by standard
fileMetaInfo.RecalculateGroupLengths();
var writer = new DicomWriter(DicomTransferSyntax.ExplicitVRLittleEndian, options, target);
var walker = new DicomDatasetWalker(fileMetaInfo);
walker.Walk(writer);
}
/// <summary>
/// Write DICOM dataset.
/// </summary>
/// <param name="target">Byte target subject to writing.</param>
/// <param name="syntax">Transfer syntax applicable to dataset.</param>
/// <param name="dataset">Dataset.</param>
/// <param name="options">Writer options.</param>
private static Task WriteDatasetAsync(
IByteTarget target,
DicomTransferSyntax syntax,
DicomDataset dataset,
DicomWriteOptions options)
{
UpdateDatasetGroupLengths(syntax, dataset, options);
var writer = new DicomWriter(syntax, options, target);
var walker = new DicomDatasetWalker(dataset);
return walker.WalkAsync(writer);
}
private void OnCompletePreamble(IByteTarget target, object state)
{
DicomWriter writer = new DicomWriter(DicomTransferSyntax.ExplicitVRLittleEndian, _options, _target);
DicomDatasetWalker walker = new DicomDatasetWalker(_fileMetaInfo);
walker.BeginWalk(writer, OnCompleteFileMetaInfo, walker);
}
private void OnCompleteFileMetaInfo(IAsyncResult result)
{
try {
DicomDatasetWalker walker;
if (result != null) {
walker = result.AsyncState as DicomDatasetWalker;
walker.EndWalk(result);
}
DicomTransferSyntax syntax = _fileMetaInfo.TransferSyntax;
DicomWriter writer = new DicomWriter(syntax, _options, _target);
walker = new DicomDatasetWalker(_dataset);
walker.BeginWalk(writer, OnCompleteDataset, walker);
} catch (Exception e) {
_exception = e;
_async.Set();
}
}
private static void WalkDataset(
IByteTarget target,
DicomTransferSyntax syntax,
DicomDataset dataset,
DicomWriteOptions options)
{
var writer = new DicomWriter(syntax, options, target);
var walker = new DicomDatasetWalker(dataset);
walker.Walk(writer);
}
private void SendNextMessage()
{
while (true)
{
DicomMessage msg;
lock (_lock)
{
if (_sending)
{
return;
}
if (_msgQueue.Count == 0)
{
if (_pending.Count == 0) OnSendQueueEmpty();
return;
}
if (!Options.IgnoreAsyncOps && Association.MaxAsyncOpsInvoked > 0
&& _pending.Count >= Association.MaxAsyncOpsInvoked)
{
Logger.Debug("Cannot send messages since pending: {pending} would exceed max async ops invoked: {invoked}",
_pending.Count,
Association.MaxAsyncOpsInvoked);
return;
// Cannot easily recover from this unwanted state, so better to throw.
throw new DicomNetworkException(
"Cannot send messages since pending: {0} would exceed max async ops invoked: {1}",
_pending.Count,
Association.MaxAsyncOpsInvoked);
}
_sending = true;
msg = _msgQueue.Dequeue();
if (msg is DicomRequest)
{
_pending.Add(msg as DicomRequest);
}
}
DicomPresentationContext pc = null;
if (msg is DicomCStoreRequest)
{
pc =
Association.PresentationContexts.FirstOrDefault(
x =>
x.Result == DicomPresentationContextResult.Accept && x.AbstractSyntax == msg.SOPClassUID
&& x.AcceptedTransferSyntax == (msg as DicomCStoreRequest).TransferSyntax);
if (pc == null)
pc =
Association.PresentationContexts.FirstOrDefault(
x =>
x.Result == DicomPresentationContextResult.Accept &&
x.AbstractSyntax == msg.SOPClassUID);
}
else if (msg is DicomResponse)
{
//the presentation context should be set already from the request object
pc = msg.PresentationContext;
//fail safe if no presentation context is already assigned to the response (is this going to happen)
if (pc == null)
{
pc = this.Association.PresentationContexts.FirstOrDefault<DicomPresentationContext>(x => (x.Result == DicomPresentationContextResult.Accept) && (x.AbstractSyntax == msg.SOPClassUID));
}
}
else
{
pc =
Association.PresentationContexts.FirstOrDefault(
x =>
x.Result == DicomPresentationContextResult.Accept && x.AbstractSyntax == msg.SOPClassUID);
}
if (pc == null)
{
pc = msg.PresentationContext;
}
if (pc == null)
{
lock (_lock)
{
_pending.Remove(msg as DicomRequest);
}
try
{
if (msg is DicomCStoreRequest)
(msg as DicomCStoreRequest).PostResponse(
this,
new DicomCStoreResponse(msg as DicomCStoreRequest, DicomStatus.SOPClassNotSupported));
else if (msg is DicomCEchoRequest)
(msg as DicomCEchoRequest).PostResponse(
this,
new DicomCEchoResponse(msg as DicomCEchoRequest, DicomStatus.SOPClassNotSupported));
else if (msg is DicomCFindRequest)
(msg as DicomCFindRequest).PostResponse(
this,
new DicomCFindResponse(
msg as DicomCFindRequest,
DicomStatus.SOPClassNotSupported));
else if (msg is DicomCGetRequest)
(msg as DicomCGetRequest).PostResponse(
this,
new DicomCGetResponse(
msg as DicomCGetRequest,
DicomStatus.SOPClassNotSupported));
else if (msg is DicomCMoveRequest)
(msg as DicomCMoveRequest).PostResponse(
this,
new DicomCMoveResponse(
msg as DicomCMoveRequest,
DicomStatus.SOPClassNotSupported));
else if (msg is DicomNActionRequest)
(msg as DicomNActionRequest).PostResponse(
this,
new DicomNActionResponse(
msg as DicomNActionRequest,
DicomStatus.SOPClassNotSupported));
else if (msg is DicomNCreateRequest)
(msg as DicomNCreateRequest).PostResponse(
this,
new DicomNCreateResponse(
msg as DicomNCreateRequest,
DicomStatus.SOPClassNotSupported));
else if (msg is DicomNDeleteRequest)
(msg as DicomNDeleteRequest).PostResponse(
this,
new DicomNDeleteResponse(
msg as DicomNDeleteRequest,
DicomStatus.SOPClassNotSupported));
else if (msg is DicomNEventReportRequest)
(msg as DicomNEventReportRequest).PostResponse(
this,
new DicomNEventReportResponse(
msg as DicomNEventReportRequest,
DicomStatus.SOPClassNotSupported));
else if (msg is DicomNGetRequest)
(msg as DicomNGetRequest).PostResponse(
this,
new DicomNGetResponse(
msg as DicomNGetRequest,
DicomStatus.SOPClassNotSupported));
else if (msg is DicomNSetRequest)
(msg as DicomNSetRequest).PostResponse(
this,
new DicomNSetResponse(
msg as DicomNSetRequest,
DicomStatus.SOPClassNotSupported));
else
{
Logger.Warn("Unknown message type: {type}", msg.Type);
}
}
catch
{
}
Logger.Error(
"No accepted presentation context found for abstract syntax: {sopClassUid}",
msg.SOPClassUID);
}
else
{
var dimse = new Dimse
{
Message = msg,
PresentationContext = pc
};
// force calculation of command group length as required by standard
msg.Command.RecalculateGroupLengths();
if (msg.HasDataset)
{
// remove group lengths as recommended in PS 3.5 7.2
//
// 2. It is recommended that Group Length elements be removed during storage or transfer
// in order to avoid the risk of inconsistencies arising during coercion of data
// element values and changes in transfer syntax.
msg.Dataset.RemoveGroupLengths();
if (msg.Dataset.InternalTransferSyntax != dimse.PresentationContext.AcceptedTransferSyntax)
{
Logger.Debug("{logId} Changing Transfer Syntax from {0} to {1}", LogID, msg.Dataset.InternalTransferSyntax, dimse.PresentationContext.AcceptedTransferSyntax);
msg.Dataset =
msg.Dataset.Clone(dimse.PresentationContext.AcceptedTransferSyntax);
}
}
Logger.Info("{logId} -> {dicomMessage}", LogID, msg.ToString(Options.LogDimseDatasets));
try
{
dimse.Stream = new PDataTFStream(this, pc.ID, Association.MaximumPDULength);
var writer = new DicomWriter(
DicomTransferSyntax.ImplicitVRLittleEndian,
DicomWriteOptions.Default,
new StreamByteTarget(dimse.Stream));
dimse.Walker = new DicomDatasetWalker(msg.Command);
dimse.Walker.Walk(writer);
if (dimse.Message.HasDataset)
{
dimse.Stream.SetIsCommandAsync(false).Wait();
writer = new DicomWriter(
dimse.PresentationContext.AcceptedTransferSyntax,
DicomWriteOptions.Default,
new StreamByteTarget(dimse.Stream));
dimse.Walker = new DicomDatasetWalker(dimse.Message.Dataset);
dimse.Walker.Walk(writer);
}
}
catch (Exception e)
{
Logger.Error("Exception sending DIMSE: {@error}", e);
}
finally
{
dimse.Stream.FlushAsync(true).Wait();
dimse.Stream.Dispose();
}
}
lock (_lock) _sending = false;
}
}
public void OnFragmentItem_LargeBuffer_ReturnValueTrue()
{
var expected = Enumerable.Range(0, 256).Select(i => (byte)i).ToArray();
var e = new ManualResetEventSlim(false);
using (var stream = new MemoryStream())
{
var target = new StreamByteTarget(stream);
var writer = new DicomWriter(
DicomTransferSyntax.ExplicitVRLittleEndian,
new DicomWriteOptions { LargeObjectSize = 200 },
target);
writer.OnBeginWalk();
Assert.True(writer.OnFragmentItem(new MemoryByteBuffer(expected)));
e.Wait(100);
var actual = new byte[expected.Length];
stream.Seek(8, SeekOrigin.Begin);
stream.Read(actual, 0, actual.Length);
Assert.Equal(expected, actual);
}
}
