/// <summary>
/// Event handler for HttpApplication.AcquireRequestState
/// </summary>
/// <param name="source"></param>
/// <param name="args"></param>
private void OnAcquireRequestState(object source, EventArgs args)
{
acquireCalled = true;
HttpApplication app = (HttpApplication)source;
HttpContext context = app.Context;
bool isNew = false;
SessionItem sessionData = null;
bool supportSessionIdReissue;
sessionIdManager.InitializeRequest(context, false, out supportSessionIdReissue);
var sessionId = sessionIdManager.GetSessionID(context);
if (sessionId != null)
{
sessionData = GetSessionItem(sessionId);
}
else
{
bool redirected, cookieAdded;
sessionId = sessionIdManager.CreateSessionID(context);
sessionIdManager.SaveSessionID(context, sessionId, out redirected, out cookieAdded);
if (redirected)
{
return;
}
}
if (sessionData == null)
{
// Identify the session as a new session state instance. Create a new SessionItem
// and add it to the local Hashtable.
isNew = true;
sessionData = AddNewSessionItem(sessionId,
SessionStateUtility.GetSessionStaticObjects(context));
}
// Add the session data to the current HttpContext.
SessionStateUtility.AddHttpSessionStateToContext(context,
new HttpSessionStateContainer(sessionId,
sessionData.Items,
sessionData.StaticObjects,
Timeout,
isNew,
CookieMode,
SessionStateMode.Custom,
false));
// Execute the Session_OnStart event for a new session.
if (isNew && Start != null)
{
Start(this, EventArgs.Empty);
}
}
private void OnAcquireRequestState(object source, EventArgs args)
{
HttpApplication app = (HttpApplication)source;
HttpContext context = app.Context;
bool isNew = false;
string sessionId;
RedisSessionItemHash sessionItemCollection = null;
bool supportSessionIDReissue = true;
sessionIDManager.InitializeRequest(context, false, out supportSessionIDReissue);
sessionId = sessionIDManager.GetSessionID(context);
if (sessionId == null)
{
bool redirected, cookieAdded;
sessionId = sessionIDManager.CreateSessionID(context);
sessionIDManager.SaveSessionID(context, sessionId, out redirected, out cookieAdded);
isNew = true;
if (redirected)
{
return;
}
}
if (!RequiresSessionState(new HttpContextWrapper(context)))
{
return;
}
releaseCalled = false;
sessionItemCollection = new RedisSessionItemHash(sessionId, redisConfig.SessionTimeout, GetRedisConnection());
if (sessionItemCollection.Count == 0)
{
isNew = true;
}
// Add the session data to the current HttpContext.
SessionStateUtility.AddHttpSessionStateToContext(context,
new TaskWaitRedisHttpSessionStateContainer(sessionId,
sessionItemCollection,
SessionStateUtility.GetSessionStaticObjects(context),
redisConfig.SessionTimeout,
isNew,
redisConfig.CookieMode,
SessionStateMode.Custom,
false));
// Execute the Session_OnStart event for a new session.
if (isNew && Start != null)
{
Start(this, EventArgs.Empty);
}
}
void OnAcquireRequestState(object o, EventArgs args)
{
Trace.WriteLine("SessionStateModule.OnAcquireRequestState (hash " + this.GetHashCode().ToString("x") + ")");
HttpApplication application = (HttpApplication)o;
HttpContext context = application.Context;
if (!(context.Handler is IRequiresSessionState))
{
Trace.WriteLine("Handler (" + context.Handler + ") does not require session state");
return;
}
bool isReadOnly = (context.Handler is IReadOnlySessionState);
bool supportSessionIDReissue;
if (idManager.InitializeRequest(context, false, out supportSessionIDReissue))
{
return; // Redirected, will come back here in a while
}
string sessionId = idManager.GetSessionID(context);
handler.InitializeRequest(context);
storeData = GetStoreData(context, sessionId, isReadOnly);
storeIsNew = false;
if (storeData == null && !storeLocked)
{
storeIsNew = true;
sessionId = idManager.CreateSessionID(context);
Trace.WriteLine("New session ID allocated: " + sessionId);
bool redirected;
bool cookieAdded;
idManager.SaveSessionID(context, sessionId, out redirected, out cookieAdded);
if (redirected)
{
if (supportSessionIDReissue)
{
handler.CreateUninitializedItem(context, sessionId, (int)config.Timeout.TotalMinutes);
}
context.Response.End();
return;
}
else
{
storeData = handler.CreateNewStoreData(context, (int)config.Timeout.TotalMinutes);
}
}
else if (storeData == null && storeLocked)
{
WaitForStoreUnlock(context, sessionId, isReadOnly);
}
else if (storeData != null &&
!storeLocked &&
storeSessionAction == SessionStateActions.InitializeItem &&
IsCookieLess(context, config))
{
storeData = handler.CreateNewStoreData(context, (int)config.Timeout.TotalMinutes);
}
container = CreateContainer(sessionId, storeData, storeIsNew, isReadOnly);
SessionStateUtility.AddHttpSessionStateToContext(app.Context, container);
if (storeIsNew)
{
OnSessionStart();
HttpSessionState hss = app.Session;
if (hss != null)
{
storeData.Timeout = hss.Timeout;
}
}
// Whenever a container is abandoned, we temporarily disable the expire call back.
// So in this case we are quite sure we have a brand new container, so we make sure it works again.
supportsExpiration = handler.SetItemExpireCallback(OnSessionExpired);
}
//</Snippet3>
//<Snippet4>
//
// Event handler for HttpApplication.AcquireRequestState
//
private void OnAcquireRequestState(object source, EventArgs args)
{
HttpApplication app = (HttpApplication)source;
HttpContext context = app.Context;
bool isNew = false;
string sessionID;
SessionItem sessionData = null;
bool supportSessionIDReissue = true;
pSessionIDManager.InitializeRequest(context, false, out supportSessionIDReissue);
sessionID = pSessionIDManager.GetSessionID(context);
if (sessionID != null)
{
try
{
pHashtableLock.AcquireReaderLock(Int32.MaxValue);
sessionData = (SessionItem)pSessionItems[sessionID];
if (sessionData != null)
{
sessionData.Expires = DateTime.Now.AddMinutes(pTimeout);
}
}
finally
{
pHashtableLock.ReleaseReaderLock();
}
}
else
{
bool redirected, cookieAdded;
sessionID = pSessionIDManager.CreateSessionID(context);
pSessionIDManager.SaveSessionID(context, sessionID, out redirected, out cookieAdded);
if (redirected)
{
return;
}
}
if (sessionData == null)
{
// Identify the session as a new session state instance. Create a new SessionItem
// and add it to the local Hashtable.
isNew = true;
sessionData = new SessionItem();
sessionData.Items = new SessionStateItemCollection();
sessionData.StaticObjects = SessionStateUtility.GetSessionStaticObjects(context);
sessionData.Expires = DateTime.Now.AddMinutes(pTimeout);
try
{
pHashtableLock.AcquireWriterLock(Int32.MaxValue);
pSessionItems[sessionID] = sessionData;
}
finally
{
pHashtableLock.ReleaseWriterLock();
}
}
// Add the session data to the current HttpContext.
SessionStateUtility.AddHttpSessionStateToContext(context,
new HttpSessionStateContainer(sessionID,
sessionData.Items,
sessionData.StaticObjects,
pTimeout,
isNew,
pCookieMode,
SessionStateMode.Custom,
false));
// Execute the Session_OnStart event for a new session.
if (isNew && Start != null)
{
Start(this, EventArgs.Empty);
}
}
private async Task AcquireStateAsync(HttpContext context)
{
_acquireCalled = true;
_releaseCalled = false;
ResetPerRequestFields();
_rqContext = new HttpContextWrapper(context);
SessionEventSource.Log.SessionDataBegin(context);
/* Notify the store we are beginning to get process request */
_store.InitializeRequest(_rqContext);
/* determine if the request requires state at all */
_rqRequiresState = SessionStateUtility.IsSessionStateRequired(context);
// SessionIDManager may need to do a redirect if cookieless setting is AutoDetect
if (_idManager.InitializeRequest(context, false, out _rqSupportSessionIdReissue))
{
SessionEventSource.Log.SessionDataEnd(context);
return;
}
/* Get sessionid */
_rqId = _idManager.GetSessionID(context);
if (!_rqRequiresState)
{
if (_rqId != null)
{
// 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.
await _store.ResetItemTimeoutAsync(_rqContext, _rqId, GetCancellationToken());
}
SessionEventSource.Log.SessionDataEnd(context);
return;
}
// 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.
_rqExecutionTimeout = s_configExecutionTimeout;
/* determine if we need just read-only access */
_rqReadonly = SessionStateUtility.IsSessionStateReadOnly(context);
if (_rqId != null)
{
/* get the session state corresponding to this session id */
await GetSessionStateItemAsync();
}
else
{
/* if there's no id yet, create it */
bool redirected = CreateSessionId();
_rqIdNew = true;
if (redirected)
{
if (s_configRegenerateExpiredSessionId)
{
// See inline comments in CreateUninitializedSessionState()
await _store.CreateUninitializedItemAsync(_rqContext, _rqId, s_timeout, GetCancellationToken());
}
SessionEventSource.Log.SessionDataEnd(context);
return;
}
}
await CompleteAcquireStateAsync(context);
}
