// Async patern
internal /*public*/ IAsyncResult BeginAspCompatExecution(AsyncCallback cb, object extraData)
{
InternalSecurityPermissions.UnmanagedCode.Demand();
if (IsInAspCompatMode)
{
// already in AspCompatMode -- execute synchronously
bool sync = true;
Exception error = _app.ExecuteStep(this, ref sync);
_ar = new HttpAsyncResult(cb, extraData, true, null, error);
_syncCaller = true;
}
else
{
_ar = new HttpAsyncResult(cb, extraData);
_syncCaller = (cb == null);
_rootedThis = GCHandle.Alloc(this);
if (UnsafeNativeMethods.AspCompatProcessRequest(_execCallback, this) != 1)
{
// failed to queue up the execution in ASP compat mode
_rootedThis.Free();
_ar.Complete(true, null, new HttpException(HttpRuntime.FormatResourceString(SR.Cannot_access_AspCompat)));
}
}
return(_ar);
}
internal /*public*/ IAsyncResult BeginAspCompatExecution(AsyncCallback cb, object extraData)
{
SynchronizationContextUtil.ValidateModeForAspCompat();
if (IsInAspCompatMode)
{
// already in AspCompatMode -- execute synchronously
bool sync = true;
Exception error = _app.ExecuteStep(this, ref sync);
_ar = new HttpAsyncResult(cb, extraData, true, null, error);
_syncCaller = true;
}
else
{
_ar = new HttpAsyncResult(cb, extraData);
_syncCaller = (cb == null);
_rootedThis = GCHandle.Alloc(this);
// send requests from the same session to the same STA thread
bool sharedActivity = (_sessionId != null);
int activityHash = sharedActivity ? _sessionId.GetHashCode() : 0;
if (UnsafeNativeMethods.AspCompatProcessRequest(_execCallback, this, sharedActivity, activityHash) != 1)
{
// failed to queue up the execution in ASP compat mode
_rootedThis.Free();
_ar.Complete(true, null, new HttpException(SR.GetString(SR.Cannot_access_AspCompat)));
}
}
return(_ar);
}
internal void TaskCompleted(bool onCallerThread)
{
int newTasksCompleted = Interlocked.Increment(ref _tasksCompleted);
Debug.Trace("Async", "TaskManager.TaskCompleted: onCallerThread=" + onCallerThread +
", _tasksCompleted=" + newTasksCompleted + ", _tasksStarted=" + _tasksStarted);
if (newTasksCompleted < _tasksStarted)
{
// need to wait for more completions
return;
}
// check if any tasks remain not started
if (!AnyTasksRemain)
{
// can complete the caller - all done
_inProgress = false;
_asyncResult.Complete(onCallerThread, null /*result*/, AnyTaskError);
return;
}
// need to resume executing tasks
if (Thread.CurrentThread.IsThreadPoolThread)
{
// if on thread pool thread, use the current thread
ResumeTasks(false /*waitUntilDone*/, onCallerThread);
}
else
{
// if on a non-threadpool thread, requeue
ThreadPool.QueueUserWorkItem(_resumeTasksCallback);
}
}
private void OnExecuteUrlCompletion(IntPtr ecb, int byteCount, int error)
{
if (this._entity != IntPtr.Zero)
{
UnsafeNativeMethods.EcbFreeExecUrlEntityInfo(this._entity);
}
this._rootedThis.Free();
HttpAsyncResult result = this._asyncResultOfExecuteUrl;
this._asyncResultOfExecuteUrl = null;
result.Complete(false, null, null);
}
private void OnAspCompatCompletion()
{
_rootedThis.Free();
_ar.Complete(false, null, _error); // resume the application execution
}
private static void BeginSetRequestContent(HttpWebRequest webRequest, ServiceRequest serviceRequest,
OssAction asyncCallback, ClientConfiguration clientConfiguration, HttpAsyncResult result)
{
var data = serviceRequest.BuildRequestContent();
if (data == null ||
(serviceRequest.Method != HttpMethod.Put &&
serviceRequest.Method != HttpMethod.Post))
{
// Skip setting content body in this case.
try
{
asyncCallback();
}
catch (Exception e)
{
result.WebRequest.Abort();
result.Complete(e);
}
return;
}
// Write data to the request stream.
long userSetContentLength = -1;
if (serviceRequest.Headers.ContainsKey(HttpHeaders.ContentLength))
{
userSetContentLength = long.Parse(serviceRequest.Headers[HttpHeaders.ContentLength]);
}
if (serviceRequest.UseChunkedEncoding || !data.CanSeek) // when data cannot seek, we have to use chunked encoding as there's no way to set the length
{
webRequest.SendChunked = true;
webRequest.AllowWriteStreamBuffering = false; // when using chunked encoding, the data is likely big and thus not use write buffer;
}
else
{
long streamLength = data.Length - data.Position;
webRequest.ContentLength = (userSetContentLength >= 0 &&
userSetContentLength <= streamLength) ? userSetContentLength : streamLength;
if (webRequest.ContentLength > clientConfiguration.DirectWriteStreamThreshold)
{
webRequest.AllowWriteStreamBuffering = false;
}
}
webRequest.BeginGetRequestStream(
(ar) =>
{
try
{
using (var requestStream = webRequest.EndGetRequestStream(ar))
{
if (!webRequest.SendChunked)
{
IoUtils.WriteTo(data, requestStream, webRequest.ContentLength);
}
else
{
IoUtils.WriteTo(data, requestStream);
}
}
asyncCallback();
}
catch (Exception e)
{
result.WebRequest.Abort();
result.Complete(e);
}
}, null);
}
/*
* Acquire session state
*/
IAsyncResult BeginAcquireState(Object source, EventArgs e, AsyncCallback cb, Object extraData) {
bool requiresState;
bool isCompleted = true;
bool skipReadingId = false;
Debug.Trace("SessionStateModuleOnAcquireState", "Beginning SessionStateModule::OnAcquireState");
_acquireCalled = true;
_releaseCalled = false;
ResetPerRequestFields();
_rqContext = ((HttpApplication)source).Context;
_rqAr = new HttpAsyncResult(cb, extraData);
ChangeImpersonation(_rqContext, false);
try {
if (EtwTrace.IsTraceEnabled(EtwTraceLevel.Information, EtwTraceFlags.AppSvc)) EtwTrace.Trace(EtwTraceType.ETW_TYPE_SESSION_DATA_BEGIN, _rqContext.WorkerRequest);
/* Notify the store we are beginning to get process request */
_store.InitializeRequest(_rqContext);
/* determine if the request requires state at all */
requiresState = _rqContext.RequiresSessionState;
// SessionIDManager may need to do a redirect if cookieless setting is AutoDetect
if (_idManager.InitializeRequest(_rqContext, false, out _rqSupportSessionIdReissue)) {
_rqAr.Complete(true, null, null);
if (EtwTrace.IsTraceEnabled(EtwTraceLevel.Information, EtwTraceFlags.AppSvc)) EtwTrace.Trace(EtwTraceType.ETW_TYPE_SESSION_DATA_END, _rqContext.WorkerRequest);
return _rqAr;
}
// See if we can skip reading the session id. See inline doc of s_allowInProcOptimization
// for details.
if (s_allowInProcOptimization &&
!s_sessionEverSet &&
(!requiresState || // Case 1
!((SessionIDManager)_idManager).UseCookieless(_rqContext)) ) { // Case 2
skipReadingId = true;
#if DBG
if (!requiresState) {
// Case 1
Debug.Trace("SessionStateModuleOnAcquireState", "Skip reading id because page has disabled session state");
}
else {
// Case 2
Debug.Trace("SessionStateModuleOnAcquireState", "Delay reading id because we're using InProc optimization, and we are not using cookieless");
}
#endif
}
else {
/* Get sessionid */
_rqId = _idManager.GetSessionID(_rqContext);
Debug.Trace("SessionStateModuleOnAcquireState", "Current request id=" + _rqId);
}
if (!requiresState) {
if (_rqId == null) {
Debug.Trace("SessionStateModuleOnAcquireState",
"Handler does not require state, " +
"session id skipped or no id found, " +
"skipReadingId=" + skipReadingId +
"\nReturning from SessionStateModule::OnAcquireState");
}
else {
Debug.Trace("SessionStateModuleOnAcquireState",
"Handler does not require state, " +
"resetting timeout for SessionId=" + _rqId +
"\nReturning from SessionStateModule::OnAcquireState");
// Still need to update the sliding timeout to keep session alive.
// There is a plan to skip this for perf reason. But it was postponed to
// after Whidbey.
_store.ResetItemTimeout(_rqContext, _rqId);
}
_rqAr.Complete(true, null, null);
if (EtwTrace.IsTraceEnabled(EtwTraceLevel.Information, EtwTraceFlags.AppSvc)) EtwTrace.Trace(EtwTraceType.ETW_TYPE_SESSION_DATA_END, _rqContext.WorkerRequest);
return _rqAr;
}
_rqExecutionTimeout = _rqContext.Timeout;
// If the page is marked as DEBUG, HttpContext.Timeout will return a very large value (~1 year)
// In this case, we want to use the executionTimeout value specified in the config to avoid
// PollLockedSession to run forever.
if (_rqExecutionTimeout == DEFAULT_DBG_EXECUTION_TIMEOUT) {
_rqExecutionTimeout = s_configExecutionTimeout;
}
/* determine if we need just read-only access */
_rqReadonly = _rqContext.ReadOnlySessionState;
if (_rqId != null) {
/* get the session state corresponding to this session id */
isCompleted = GetSessionStateItem();
}
else if (!skipReadingId) {
/* if there's no id yet, create it */
bool redirected = CreateSessionId();
_rqIdNew = true;
if (redirected) {
if (s_configRegenerateExpiredSessionId) {
// See inline comments in CreateUninitializedSessionState()
CreateUninitializedSessionState();
}
_rqAr.Complete(true, null, null);
if (EtwTrace.IsTraceEnabled(EtwTraceLevel.Information, EtwTraceFlags.AppSvc)) EtwTrace.Trace(EtwTraceType.ETW_TYPE_SESSION_DATA_END, _rqContext.WorkerRequest);
return _rqAr;
}
}
if (isCompleted) {
CompleteAcquireState();
_rqAr.Complete(true, null, null);
}
return _rqAr;
}
finally {
RestoreImpersonation();
}
}
