/// <summary>
/// Perform the actual cleanup work.
/// </summary>
/// <param name="disposing">If 'true' this method is called from user code; if 'false' it is called by the runtime.</param>
protected virtual void Dispose(bool disposing)
{
HttpWebResponse response = this.httpWebResponse;
this.httpWebResponse = null;
if (response != null)
{
((IDisposable)response).Dispose();
}
WebUtil.DisposeMessage(this.underlyingResponseMessage);
this.underlyingResponseMessage = null;
}
/// <summary>
/// Sets the stream of response message to local outputResponseStream.
/// </summary>
private void GetStreamFromResponseMessage()
{
if (HttpStatusCode.NoContent != this.StatusCode)
{
Stream stream = this.responseMessage.GetStream();
if (null != stream)
{
this.outputResponseStream = stream;
}
}
else
{
WebUtil.DisposeMessage(this.responseMessage);
}
}
/// <summary>cleanup work to do once the request has completed</summary>
protected override void CompletedRequest()
{
byte[] buffer = this.asyncStreamCopyBuffer;
this.asyncStreamCopyBuffer = null;
if ((null != buffer) && !this.usingBuffer)
{
this.PutAsyncResponseStreamCopyBuffer(buffer);
}
if (this.responseStreamOwner)
{
if (null != this.outputResponseStream)
{
this.outputResponseStream.Position = 0;
}
}
Debug.Assert(null != this.responseMessage || null != this.Failure || this.IsAborted, "should have response or exception");
if (null != this.responseMessage)
{
if (!this.AllowDirectNetworkStreamReading)
{
// we've cached off what we need, headers still accessible after close
WebUtil.DisposeMessage(this.responseMessage);
}
Version responseVersion;
Exception ex = SaveResult.HandleResponse(
this.RequestInfo,
this.StatusCode,
this.responseMessage.GetHeader(XmlConstants.HttpDataServiceVersion),
this.GetResponseStream,
false,
out responseVersion);
if (null != ex)
{
this.HandleFailure(ex);
}
else
{
this.responseInfo = this.CreateResponseInfo();
}
}
}
/// <summary>
/// dispose
/// </summary>
public void Dispose()
{
this.current = null;
if (null != this.materializer)
{
this.materializer.Dispose();
}
if (null != this.writer)
{
this.writer.Dispose();
}
if (null != this.responseMessage)
{
WebUtil.DisposeMessage(this.responseMessage);
}
GC.SuppressFinalize(this);
}
/// <summary>invoked for derived classes to cleanup before callback is invoked</summary>
protected override void CompletedRequest()
{
Debug.Assert(null != this.responseMessage || null != this.Failure, "should have response or exception");
if (null != this.responseMessage)
{
// Can't use DataServiceContext.HandleResponse as this request didn't necessarily go to our server
// the MR could have been served by arbitrary server.
InvalidOperationException failure = null;
if (!WebUtil.SuccessStatusCode((HttpStatusCode)this.responseMessage.StatusCode))
{
failure = SaveResult.GetResponseText(
this.responseMessage.GetStream,
(HttpStatusCode)this.responseMessage.StatusCode);
}
if (failure != null)
{
// we've cached off what we need, headers still accessible after close
WebUtil.DisposeMessage(this.responseMessage);
this.HandleFailure(failure);
}
}
}
/// <summary>
/// Synchronizely get the query set count from the server by executing the $count=value query
/// </summary>
/// <param name="context">The context</param>
/// <returns>The server side count of the query set</returns>
internal long GetQuerySetCount(DataServiceContext context)
{
Debug.Assert(null != context, "context is null");
Version requestVersion = this.QueryComponents(context.Model).Version;
if (requestVersion == null || requestVersion.Major < 2)
{
// minimum DSV for $count is V2.
requestVersion = Util.DataServiceVersion2;
}
QueryResult response = null;
QueryComponents qc = this.QueryComponents(context.Model);
Uri requestUri = qc.Uri;
DataServiceRequest <long> serviceRequest = new DataServiceRequest <long>(requestUri, qc, null);
HeaderCollection headers = new HeaderCollection();
// Validate and set the request DSV header
headers.SetRequestVersion(requestVersion, context.MaxProtocolVersionAsVersion);
context.Format.SetRequestAcceptHeaderForCount(headers);
string httpMethod = XmlConstants.HttpMethodGet;
ODataRequestMessageWrapper request = context.CreateODataRequestMessage(
context.CreateRequestArgsAndFireBuildingRequest(httpMethod, requestUri, headers, context.HttpStack, null /*descriptor*/),
new string[] { XmlConstants.HttpRequestAccept } /*headersToReset*/,
null /*descriptor*/);
response = new QueryResult(this, Util.ExecuteMethodName, serviceRequest, request, new RequestInfo(context), null, null);
response.AllowDirectNetworkStreamReading = context.AllowDirectNetworkStreamReading;
IODataResponseMessage responseMessage = null;
try
{
responseMessage = response.ExecuteQuery();
if (HttpStatusCode.NoContent != response.StatusCode)
{
StreamReader sr = new StreamReader(response.GetResponseStream());
long r = -1;
try
{
r = XmlConvert.ToInt64(sr.ReadToEnd());
}
finally
{
sr.Close();
}
return(r);
}
else
{
throw new DataServiceQueryException(Strings.DataServiceRequest_FailGetCount, response.Failure);
}
}
catch (InvalidOperationException ex)
{
QueryOperationResponse operationResponse = null;
operationResponse = response.GetResponse <long>(MaterializeAtom.EmptyResults);
if (null != operationResponse)
{
operationResponse.Error = ex;
throw new DataServiceQueryException(Strings.DataServiceException_GeneralError, ex, operationResponse);
}
throw;
}
finally
{
WebUtil.DisposeMessage(responseMessage);
}
}
/// <summary>Releases all resources used by the current instance of the <see cref="T:System.Data.Services.Client.DataServiceStreamResponse" /> class.</summary>
public void Dispose()
{
WebUtil.DisposeMessage(this.responseMessage);
}
