private static void ProcessStartOfRequest <T>(ExecutionState <T> executionState)
{
// 1. Build request
executionState.Req = executionState.RestCMD.BuildRequestDelegate(executionState.Cmd.Uri, executionState.Cmd.Builder, executionState.Cmd.ServerTimeoutInSeconds, executionState.OperationContext);
// User Headers
Executor.ApplyUserHeaders(executionState);
executionState.CancelDelegate = executionState.Req.Abort;
// 2. Set Headers
if (executionState.RestCMD.SetHeaders != null)
{
executionState.RestCMD.SetHeaders(executionState.Req, executionState.OperationContext);
}
if (executionState.RestCMD.SendStream != null)
{
CommonUtils.ApplyRequestOptimizations(executionState.Req, executionState.RestCMD.SendStream.Length - executionState.RestCMD.SendStream.Position);
}
else
{
CommonUtils.ApplyRequestOptimizations(executionState.Req, -1);
}
Executor.FireSendingRequest(executionState);
// 3. Sign Request
if (executionState.RestCMD.SignRequest != null)
{
executionState.RestCMD.SignRequest(executionState.Req, executionState.OperationContext);
}
// 4. Set timeout (this is actually not honored by asynchronous requests)
executionState.Req.Timeout = executionState.RemainingTimeout;
}
/// <summary>
/// Callback on DataContext object sending request.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="System.Data.Services.Client.SendingRequestEventArgs"/> instance containing the event data.</param>
private void TableServiceContext_SendingRequest(object sender, SendingRequestEventArgs e)
{
HttpWebRequest request = e.Request as HttpWebRequest;
// Check timeout
int timeoutDex = request.RequestUri.Query.LastIndexOf("&timeout=", System.StringComparison.Ordinal);
if (timeoutDex > 0)
{
timeoutDex += 9; // Magic number -> length of "&timeout="
int endDex = request.RequestUri.Query.IndexOf('&', timeoutDex);
string timeoutString = endDex > 0
? request.RequestUri.Query.Substring(timeoutDex, endDex - timeoutDex)
: request.RequestUri.Query.Substring(timeoutDex);
int result = -1;
int.TryParse(timeoutString, out result);
if (result > 0)
{
request.Timeout = result * 1000; // Convert to ms
}
}
// Sign request
if (this.ServiceClient.Credentials.IsSharedKey)
{
this.ServiceClient.AuthenticationHandler.SignRequest(request, null /* operationContext */);
}
else if (this.ServiceClient.Credentials.IsSAS)
{
Uri transformedUri = this.ServiceClient.Credentials.TransformUri(request.RequestUri);
// Recreate the request
HttpWebRequest newRequest = WebRequest.Create(transformedUri) as HttpWebRequest;
TableUtilities.CopyRequestData(newRequest, request);
e.Request = newRequest;
request = newRequest;
}
lock (this.cancellationLock)
{
if (this.cancellationRequested)
{
throw new OperationCanceledException(SR.OperationCanceled);
}
this.currentRequest = request;
}
// SAS will be handled directly by the queries themselves prior to transformation
request.Headers.Add(
Constants.HeaderConstants.StorageVersionHeader,
Constants.HeaderConstants.TargetStorageVersion);
CommonUtils.ApplyRequestOptimizations(request, -1);
if (this.sendingSignedRequestAction != null)
{
this.sendingSignedRequestAction(request);
}
}
