private static MemoryStream RetrieveImageData(string url, out StreamingResultMetaData result)
{
try
{
result = new StreamingResultMetaData();
result.Speed.Start();
var request = (HttpWebRequest)WebRequest.Create(url.ToString());
request.Accept = "application/dicom,application/Macro,application/Macro-header,image/jpeg,application/pdf";
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;
return(new MemoryStream(buffer));
}
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 Stream RetrievePdf(string serverAE, string studyInstanceUID, string seriesInstanceUID, string sopInstanceUid, out StreamingResultMetaData metaInfo)
{
string imageUrl = BuildImageUrl(serverAE, studyInstanceUID, seriesInstanceUID, sopInstanceUid);
imageUrl = imageUrl + String.Format("&contentType={0}", HttpUtility.HtmlEncode("application/pdf"));
return(RetrieveImageData(imageUrl, out metaInfo));
}
public Stream RetrieveImageHeader(string serverAE, string studyInstanceUID, string seriesInstanceUID, string sopInstanceUid, uint stopTag, out StreamingResultMetaData metaInfo)
{
string imageUrl = BuildImageUrl(serverAE, studyInstanceUID, seriesInstanceUID, sopInstanceUid);
imageUrl = imageUrl + String.Format("&stopTag={0:x8}", stopTag);
imageUrl = imageUrl + String.Format("&contentType={0}", HttpUtility.HtmlEncode("application/Macro-header"));
return(RetrieveImageData(imageUrl, out metaInfo));
}
