private static void AddPaginationHeders(IQidoRequestModel request, HttpResponseMessage response, PagedResult <DicomDataset> results)
{
LinkHeaderBuilder headerBuilder = new LinkHeaderBuilder( );
response.Headers.Add("link",
headerBuilder.GetLinkHeader(results, HttpContext.Current.Request.Url.AbsoluteUri));
response.Headers.Add("X-Total-Count", results.TotalCount.ToString());
response.Headers.Add("Access-Control-Expose-Headers", "link");
response.Headers.Add("Access-Control-Allow-Headers", "link");
response.Headers.Add("Access-Control-Expose-Headers", "X-Total-Count");
response.Headers.Add("Access-Control-Allow-Headers", "X-Total-Count");
if (results.TotalCount > results.Result.Count())
{
if (!request.Limit.HasValue ||
(request.Limit.HasValue && request.Limit.Value > results.PageSize))
{
response.Headers.Add("Warning", "299 " + "DICOMcloud" +
" \"The number of results exceeded the maximum supported by the server. Additional results can be requested.\"");
//DICOM: http://dicom.nema.org/dicom/2013/output/chtml/part18/sect_6.7.html
//Warning: 299 {SERVICE}: "The number of results exceeded the maximum supported by the server. Additional results can be requested.
}
}
}
private static HttpResponseMessage CreateMultipartResponse(IQidoRequestModel request, IEnumerable <DicomDataset> results)
{
HttpResponseMessage response;
if (MultipartResponseHelper.GetSubMediaType(request.AcceptHeader.FirstOrDefault( )) == MimeMediaTypes.xmlDicom)
{
MultipartContent multiContent;
response = new HttpResponseMessage( );
multiContent = new MultipartContent("related", MultipartResponseHelper.DicomDataBoundary);
response.Content = multiContent;
foreach (var result in results)
{
XmlDicomConverter converter = new XmlDicomConverter( );
MultipartResponseHelper.AddMultipartContent(multiContent,
new WadoResponse(new MemoryStream(Encoding.ASCII.GetBytes(converter.Convert(result))),
MimeMediaTypes.xmlDicom));
}
multiContent.Headers.ContentType.Parameters.Add(new System.Net.Http.Headers.NameValueHeaderValue("type",
"\"" + MimeMediaTypes.xmlDicom + "\""));
}
else
{
response = new HttpResponseMessage(System.Net.HttpStatusCode.BadRequest);
}
return(response);
}
public HttpResponseMessage SearchForSeries
(
[ModelBinder(typeof(QidoRequestModelBinder))]
IQidoRequestModel request
)
{
return(QidoService.SearchForSeries(request));
}
protected virtual IQueryOptions GetQueryOptions(IQidoRequestModel qidoRequest)
{
var queryOptions = CreateNewQueryOptions( );
queryOptions.Limit = Math.Min(MaximumResultsLimit, qidoRequest.Limit.HasValue ? qidoRequest.Limit.Value : MaximumResultsLimit);
queryOptions.Offset = Math.Max(0, qidoRequest.Offset.HasValue ? qidoRequest.Offset.Value : 0);
return(queryOptions);
}
protected virtual IQueryOptions GetQueryOptions(IQidoRequestModel qidoRequest)
{
var queryOptions = CreateNewQueryOptions( );
queryOptions.Limit = qidoRequest.Limit;
queryOptions.Offset = qidoRequest.Offset;
return(queryOptions);
}
private HttpResponseMessage SearchForDicomEntity
(
IQidoRequestModel request,
DicomAttributeCollection dicomSource,
DoQueryDelegate doQuery
)
{
if (null != request.Query)
{
var matchingParams = request.Query.MatchingElements;
var includeParams = request.Query.IncludeElements;
foreach (var queryParam in matchingParams)
{
string paramValue = queryParam.Value;
InsertDicomElement(dicomSource, queryParam.Key, paramValue);
}
foreach (var returnParam in includeParams)
{
InsertDicomElement(dicomSource, returnParam, "");
}
ICollection <DicomAttributeCollection> results = doQuery(QueryService, dicomSource, request.Limit, request.Offset); //TODO: move configuration params into their own object
StringBuilder jsonReturn = new StringBuilder("[");
JsonDicomConverter converter = new JsonDicomConverter( )
{
IncludeEmptyElements = true
};
foreach (var response in results)
{
jsonReturn.AppendLine(converter.Convert(response));
jsonReturn.Append(",");
}
if (results.Count > 0)
{
jsonReturn.Remove(jsonReturn.Length - 1, 1);
}
jsonReturn.Append("]");
return(new HttpResponseMessage(System.Net.HttpStatusCode.OK)
{
Content = new StringContent(jsonReturn.ToString( ), Encoding.UTF8, MimeMediaTypes.Json)
});
}
return(null);
}
public virtual HttpResponseMessage SearchForSeries(IQidoRequestModel request)
{
return(SearchForDicomEntity(request,
DefaultDicomQueryElements.GetDefaultSeriesQuery( ),
delegate
(
IObjectArchieveQueryService queryService,
DicomDataset dicomRequest,
IQidoRequestModel qidoResult
)
{
return queryService.FindSeriesPaged(dicomRequest, GetQueryOptions(qidoResult));
}));
}
public HttpResponseMessage SearchForInstances(IQidoRequestModel request)
{
return(SearchForDicomEntity(request,
DefaultDicomQueryElements.GetDefaultInstanceQuery( ),
delegate
(
IObjectArchieveQueryService queryService,
fo.DicomDataset dicomRequest,
IQidoRequestModel qidoResult
)
{
return queryService.FindObjectInstances(dicomRequest, GetQueryOptions(qidoResult));
}));
}
public HttpResponseMessage SearchForInstances(IQidoRequestModel request)
{
return(SearchForDicomEntity(request,
DefaultDicomQueryElements.GetDefaultInstanceQuery( ),
delegate
(
IObjectArchieveQueryService queryService,
DicomAttributeCollection dicomRequest,
int?limit,
int?offset
)
{
return queryService.FindObjectInstances(dicomRequest, offset, limit);
}));
}
private void AddResponseHeaders
(
IQidoRequestModel request,
DicomDataset dicomSource,
HttpResponseMessage response,
PagedResult <DicomDataset> results
)
{
//special parameters, if included, a representative instance UID (first) will be returned in header for each DS result
if (response.IsSuccessStatusCode && request.Query.CustomParameters.ContainsKey("_instance-header"))
{
AddPreviewInstanceHeader(results.Result, response);
}
AddPaginationHeders(request, response, results);
}
/// <summary>
/// If access Qido interface with URL http://localhost:44301/qidors/studies/1.3.12.2.1107.5.3.4.2373.1.20171103124622/series
/// will get a 404 page, this method will check if the URL contains uid information.
/// </summary>
/// <param name="valueProvider"></param>
/// <param name="wadoReq"></param>
private void CheckAndFillUids(IValueProvider valueProvider, IQidoRequestModel wadoReq)
{
string studyInstanceUidKey = fo.DicomTag.StudyInstanceUID.DictionaryEntry.Keyword.ToLower();
string seriesInstanceUidKey = fo.DicomTag.SeriesInstanceUID.DictionaryEntry.Keyword.ToLower();
string sopInstanceUidKey = fo.DicomTag.SOPInstanceUID.DictionaryEntry.Keyword.ToLower();
if (!wadoReq.Query.MatchingElements.ContainsKey(studyInstanceUidKey))
{
ValueProviderResult valueResult = valueProvider.GetValue(studyInstanceUidKey);
if (valueResult != null)
{
string studyInstanceUid = valueResult.RawValue as string;
if (!string.IsNullOrEmpty(studyInstanceUid))
{
wadoReq.Query.MatchingElements.Add(studyInstanceUidKey, studyInstanceUid);
}
}
}
if (!wadoReq.Query.MatchingElements.ContainsKey(seriesInstanceUidKey))
{
ValueProviderResult valueResult = valueProvider.GetValue(seriesInstanceUidKey);
if (valueResult != null)
{
string seriesInstanceUid = valueResult.RawValue as string;
if (!string.IsNullOrEmpty(seriesInstanceUid))
{
wadoReq.Query.MatchingElements.Add(seriesInstanceUidKey, seriesInstanceUid);
}
}
}
if (!wadoReq.Query.MatchingElements.ContainsKey(sopInstanceUidKey))
{
ValueProviderResult valueResult = valueProvider.GetValue(sopInstanceUidKey);
if (valueResult != null)
{
string sopInstanceUid = valueResult.RawValue as string;
if (!string.IsNullOrEmpty(sopInstanceUid))
{
wadoReq.Query.MatchingElements.Add(sopInstanceUidKey, sopInstanceUid);
}
}
}
}
private HttpResponseMessage SearchForDicomEntity
(
IQidoRequestModel request,
DicomDataset dicomSource,
DoQueryDelegate doQuery
)
{
if (null != request.Query)
{
HttpResponseMessage response = null;
var matchingParams = request.Query.MatchingElements;
var includeParams = request.Query.IncludeElements;
foreach (var returnParam in includeParams)
{
InsertDicomElement(dicomSource, returnParam, "");
}
foreach (var queryParam in matchingParams)
{
string paramValue = queryParam.Value;
InsertDicomElement(dicomSource, queryParam.Key, paramValue);
}
var results = doQuery(QueryService, dicomSource, request); //TODO: move configuration params into their own object
if (MultipartResponseHelper.IsMultiPartRequest(request))
{
response = CreateMultipartResponse(request, results.Result);
}
else
{
response = CreateJsonResponse(results.Result);
}
AddResponseHeaders(request, dicomSource, response, results);
return(response);
}
return(null);
}
public HttpResponseMessage SearchForStudies
(
IQidoRequestModel request
)
{
return(SearchForDicomEntity(request,
DefaultDicomQueryElements.GetDefaultStudyQuery(),
delegate
(
IObjectArchieveQueryService queryService,
fo.DicomDataset dicomRequest,
IQidoRequestModel qidoRequest
)
{
IQueryOptions queryOptions = GetQueryOptions(qidoRequest);
return queryService.FindStudies(dicomRequest, queryOptions);
}));
}
private HttpResponseMessage SearchForDicomEntity
(
IQidoRequestModel request,
fo.DicomDataset dicomSource,
DoQueryDelegate doQuery
)
{
if (null != request.Query)
{
var matchingParams = request.Query.MatchingElements;
var includeParams = request.Query.IncludeElements;
foreach (var returnParam in includeParams)
{
InsertDicomElement(dicomSource, returnParam, "");
}
foreach (var queryParam in matchingParams)
{
string paramValue = queryParam.Value;
InsertDicomElement(dicomSource, queryParam.Key, paramValue);
}
ICollection <fo.DicomDataset> results = doQuery(QueryService, dicomSource, request); //TODO: move configuration params into their own object
if (MultipartResponseHelper.IsMultiPartRequest(request))
{
if (MultipartResponseHelper.GetSubMediaType(request.AcceptHeader.FirstOrDefault( )) == MimeMediaTypes.xmlDicom)
{
HttpResponseMessage response;
MultipartContent multiContent;
response = new HttpResponseMessage( );
multiContent = new MultipartContent("related", MultipartResponseHelper.DicomDataBoundary);
response.Content = multiContent;
foreach (var result in results)
{
XmlDicomConverter converter = new XmlDicomConverter( );
MultipartResponseHelper.AddMultipartContent(multiContent,
new WadoResponse(new MemoryStream(Encoding.ASCII.GetBytes(converter.Convert(result))),
MimeMediaTypes.xmlDicom));
}
multiContent.Headers.ContentType.Parameters.Add(new System.Net.Http.Headers.NameValueHeaderValue("type",
"\"" + MimeMediaTypes.xmlDicom + "\""));
return(response);
}
else
{
return(new HttpResponseMessage(System.Net.HttpStatusCode.BadRequest));
}
}
else
{
StringBuilder jsonReturn = new StringBuilder("[");
JsonDicomConverter converter = new JsonDicomConverter( )
{
IncludeEmptyElements = true
};
foreach (var response in results)
{
jsonReturn.AppendLine(converter.Convert(response));
jsonReturn.Append(",");
}
if (results.Count > 0)
{
jsonReturn.Remove(jsonReturn.Length - 1, 1);
}
jsonReturn.Append("]");
return(new HttpResponseMessage(System.Net.HttpStatusCode.OK)
{
Content = new StringContent(jsonReturn.ToString( ),
Encoding.UTF8,
MimeMediaTypes.Json)
});
}
}
return(null);
}
public bool TryParse(HttpRequestMessage request, out IQidoRequestModel result)
{
QidoRequestModel wadoReq = new QidoRequestModel( );
wadoReq.Query = new QidoQuery( );
wadoReq.AcceptHeader = request.Headers.Accept;
wadoReq.AcceptCharsetHeader = request.Headers.AcceptCharset;
var query = request.RequestUri.ParseQueryString( );
foreach (var key in query)
{
string queryKey = ((string)key).Trim( ).ToLower( );
switch (queryKey)
{
case QidoRequestKeys.FuzzyMatching:
{
bool fuzzy;
if (bool.TryParse(query[QidoRequestKeys.FuzzyMatching], out fuzzy))
{
wadoReq.FuzzyMatching = fuzzy;
}
}
break;
case QidoRequestKeys.Limit:
{
int limit;
if (int.TryParse(query[QidoRequestKeys.Limit], out limit))
{
wadoReq.Limit = limit;
}
}
break;
case QidoRequestKeys.Offset:
{
int offset;
if (int.TryParse(query[QidoRequestKeys.Offset], out offset))
{
wadoReq.Offset = offset;
}
}
break;
case QidoRequestKeys.IncludeField:
{
string includeFields = query[QidoRequestKeys.IncludeField];
if (!string.IsNullOrWhiteSpace(includeFields))
{
wadoReq.Query.IncludeElements.AddRange(includeFields.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries));
}
}
break;
default:
{
string matchingQuery = query[queryKey].Trim( );
//string[] matchingQueryValues = matchingQuery.Trim ( ).Split ( new char[] {','}, StringSplitOptions.RemoveEmptyEntries ) ;
var matchingElements = wadoReq.Query.MatchingElements;
//TODO: what if key exists
//should return invalid request
//foreach ( var matchingParam in matchingQueryValues )
{
matchingElements.Add(queryKey, matchingQuery);
}
}
break;
}
}
result = wadoReq;
return(true);
}
public virtual bool TryParse(HttpRequestMessage request, ModelBindingContext bindingContext, out IQidoRequestModel result)
{
IQidoRequestModel wadoReq = CreateModel( );
wadoReq.AcceptHeader = request.Headers.Accept;
wadoReq.AcceptCharsetHeader = request.Headers.AcceptCharset;
var query = request.RequestUri.ParseQueryString();
foreach (var key in query)
{
string queryKey = ((string)key).Trim().ToLower();
if (queryKey == "")
{
continue;
}
switch (queryKey)
{
case QidoRequestKeys.FuzzyMatching:
{
bool fuzzy;
if (bool.TryParse(query[QidoRequestKeys.FuzzyMatching], out fuzzy))
{
wadoReq.FuzzyMatching = fuzzy;
}
}
break;
case QidoRequestKeys.Limit:
{
int limit;
if (int.TryParse(query[QidoRequestKeys.Limit], out limit))
{
wadoReq.Limit = limit;
}
}
break;
case QidoRequestKeys.Offset:
{
int offset;
if (int.TryParse(query[QidoRequestKeys.Offset], out offset))
{
wadoReq.Offset = offset;
}
}
break;
case QidoRequestKeys.IncludeField:
{
string includeFields = query[QidoRequestKeys.IncludeField];
if (!string.IsNullOrWhiteSpace(includeFields))
{
wadoReq.Query.IncludeElements.AddRange(includeFields.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries));
}
}
break;
default:
{
string queryValue = query[queryKey].Trim();
if (queryKey.StartsWith("_"))
{
wadoReq.Query.CustomParameters.Add(queryKey, queryValue);
}
else
{
wadoReq.Query.MatchingElements.Add(queryKey, queryValue);
}
}
break;
}
}
CheckAndFillUids(bindingContext.ValueProvider, wadoReq);
result = wadoReq;
return(true);
}
