public void Unload()
{
lock (_syncLock)
{
_alreadyRetrieved = false;
_retrieveResult = null;
ResetAttemptData();
}
}
public byte[] GetUncompressedPixelData()
{
try
{
//construct this object before the lock so there's no chance of deadlocking
//with the parent data source (because we are accessing its tags at the
//same time as it's trying to get the pixel data).
FramePixelDataRetriever retriever = new FramePixelDataRetriever(this);
lock (_syncLock)
{
RetrievePixelDataResult result;
if (_retrieveResult == null)
{
AbortAttemptIfNecessary();
ResetAttemptData();
_retrievesAttempted++;
result = retriever.Retrieve();
}
else
result = _retrieveResult;
//free this memory up in case it's holding a compressed buffer.
_retrieveResult = null;
CodeClock clock = new CodeClock();
clock.Start();
//synchronize the call to decompress; it's really already synchronized by
//the parent b/c it's only called from CreateFrameNormalizedPixelData, but it doesn't hurt.
byte[] pixelData = result.GetPixelData();
clock.Stop();
Platform.Log(LogLevel.Debug,
"[Decompress Info] Sop/Frame: {0}/{1}, Transfer Syntax: {2}, Uncompressed bytes: {3}, Elapsed (s): {4}",
retriever.SopInstanceUid, FrameNumber, retriever.TransferSyntaxUid,
pixelData.Length, clock.Seconds);
return pixelData;
}
}
catch(Exception ex)
{
_lastError = ex;
throw;
}
}
public void Retrieve()
{
if (!_alreadyRetrieved)
{
//construct this object before the lock so there's no chance of deadlocking
//with the parent data source (because we are accessing it's tags at the
//same time as it's trying to get the pixel data).
FramePixelDataRetriever retriever = new FramePixelDataRetriever(this);
lock (_syncLock)
{
if (!_alreadyRetrieved)
{
AbortAttemptIfNecessary();
try
{
ResetAttemptData();
_retrievesAttempted++;
var start = DateTime.Now;
_retrieveResult = retriever.Retrieve();
var end = DateTime.Now;
_lastRetrievePerformanceInfo =
new StreamingPerformanceInfo(start, end, _retrieveResult.MetaData.ContentLength);
_alreadyRetrieved = true;
}
catch (Exception ex)
{
_lastError = ex;
throw;
}
}
}
}
}
public ImageServerFramePixelData(RetrievePixelDataResult result)
{
InternalResult = result;
}
public RetrievePixelDataResult RetrievePixelData(string serverAE, string studyInstanceUID, string seriesInstanceUID, string sopInstanceUid, int frame)
{
try
{
CodeClock clock = new CodeClock();
clock.Start();
FrameStreamingResultMetaData result = new FrameStreamingResultMetaData();
StringBuilder url = new StringBuilder();
if (_baseUri.ToString().EndsWith("/"))
{
url.AppendFormat("{0}{1}", _baseUri, serverAE);
}
else
{
url.AppendFormat("{0}/{1}", _baseUri, serverAE);
}
url.AppendFormat("?requesttype=WADO&studyUID={0}&seriesUID={1}&objectUID={2}", studyInstanceUID, seriesInstanceUID, sopInstanceUid);
url.AppendFormat("&frameNumber={0}", frame);
url.AppendFormat("&contentType={0}", HttpUtility.HtmlEncode("application/clearcanvas"));
result.Speed.Start();
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url.ToString());
request.Accept = "application/dicom,application/clearcanvas,image/jpeg";
request.Timeout = (int)TimeSpan.FromSeconds(StreamingSettings.Default.ClientTimeoutSeconds).TotalMilliseconds;
request.KeepAlive = false;
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
if (response.StatusCode != HttpStatusCode.OK)
{
throw new StreamingClientException(response.StatusCode, HttpUtility.HtmlDecode(response.StatusDescription));
}
Stream responseStream = response.GetResponseStream();
BinaryReader reader = new BinaryReader(responseStream);
byte[] buffer = reader.ReadBytes((int)response.ContentLength);
reader.Close();
responseStream.Close();
response.Close();
result.Speed.SetData(buffer.Length);
result.Speed.End();
result.ResponseMimeType = response.ContentType;
result.Status = response.StatusCode;
result.StatusDescription = response.StatusDescription;
result.Uri = response.ResponseUri;
result.ContentLength = buffer.Length;
result.IsLast = (response.Headers["IsLast"] != null && bool.Parse(response.Headers["IsLast"]));
clock.Stop();
PerformanceReportBroker.PublishReport("Streaming", "RetrievePixelData", clock.Seconds);
RetrievePixelDataResult pixelDataResult;
if (response.Headers["Compressed"] != null && bool.Parse(response.Headers["Compressed"]))
{
pixelDataResult = new RetrievePixelDataResult(CreateCompressedPixelData(response, buffer), result);
}
else
{
pixelDataResult = new RetrievePixelDataResult(buffer, result);
}
return(pixelDataResult);
}
catch (WebException ex)
{
if (ex.Status == WebExceptionStatus.ProtocolError && ex.Response is HttpWebResponse)
{
HttpWebResponse response = (HttpWebResponse)ex.Response;
throw new StreamingClientException(response.StatusCode, HttpUtility.HtmlDecode(response.StatusDescription));
}
throw new StreamingClientException(StreamingClientExceptionType.Network, ex);
}
}
public RetrievePixelDataResult RetrievePixelData(string serverAE, string studyInstanceUID, string seriesInstanceUID, string sopInstanceUid, int frame)
{
try
{
CodeClock clock = new CodeClock();
clock.Start();
FrameStreamingResultMetaData result = new FrameStreamingResultMetaData();
StringBuilder url = new StringBuilder();
if (_baseUri.ToString().EndsWith("/"))
{
url.AppendFormat("{0}{1}", _baseUri, serverAE);
}
else
{
url.AppendFormat("{0}/{1}", _baseUri, serverAE);
}
url.AppendFormat("?requesttype=WADO&studyUID={0}&seriesUID={1}&objectUID={2}", studyInstanceUID, seriesInstanceUID, sopInstanceUid);
url.AppendFormat("&frameNumber={0}", frame);
url.AppendFormat("&contentType={0}", HttpUtility.HtmlEncode("application/clearcanvas"));
result.Speed.Start();
HttpWebRequest request = (HttpWebRequest) WebRequest.Create(url.ToString());
request.Accept = "application/dicom,application/clearcanvas,image/jpeg";
request.Timeout = (int) TimeSpan.FromSeconds(StreamingSettings.Default.ClientTimeoutSeconds).TotalMilliseconds;
request.KeepAlive = false;
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
if (response.StatusCode != HttpStatusCode.OK)
{
throw new StreamingClientException(response.StatusCode, HttpUtility.HtmlDecode(response.StatusDescription));
}
Stream responseStream = response.GetResponseStream();
BinaryReader reader = new BinaryReader(responseStream);
byte[] buffer = reader.ReadBytes((int) response.ContentLength);
reader.Close();
responseStream.Close();
response.Close();
result.Speed.SetData(buffer.Length);
result.Speed.End();
result.ResponseMimeType = response.ContentType;
result.Status = response.StatusCode;
result.StatusDescription = response.StatusDescription;
result.Uri = response.ResponseUri;
result.ContentLength = buffer.Length;
result.IsLast = (response.Headers["IsLast"] != null && bool.Parse(response.Headers["IsLast"]));
clock.Stop();
PerformanceReportBroker.PublishReport("Streaming", "RetrievePixelData", clock.Seconds);
RetrievePixelDataResult pixelDataResult;
if (response.Headers["Compressed"] != null && bool.Parse(response.Headers["Compressed"]))
pixelDataResult = new RetrievePixelDataResult(CreateCompressedPixelData(response, buffer), result);
else
pixelDataResult = new RetrievePixelDataResult(buffer, result);
return pixelDataResult;
}
catch (WebException ex)
{
if (ex.Status == WebExceptionStatus.ProtocolError && ex.Response is HttpWebResponse)
{
HttpWebResponse response = (HttpWebResponse) ex.Response;
throw new StreamingClientException(response.StatusCode, HttpUtility.HtmlDecode(response.StatusDescription));
}
throw new StreamingClientException(StreamingClientExceptionType.Network, ex);
}
}
