HTTPModule Event Execution Order?

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Maybe this helps

http://support.microsoft.com/kb/307985/en-us/

An HttpApplication class provides a number of events with which modules can synchronize. The following events are available for modules to synchronize with on each request. These events are listed in sequential order:

  1. BeginRequest
  2. AuthenticateRequest
  3. AuthorizeRequest
  4. ResolveRequestCache
  5. AcquireRequestState
  6. PreRequestHandlerExecute
  7. PostRequestHandlerExecute
  8. ReleaseRequestState
  9. UpdateRequestCache
  10. EndRequest

The following events are available for modules to synchronize with for each request transmission. The order of these events is non-deterministic.

  • PreSendRequestHeaders
  • PreSendRequestContent
  • Error

See the article for full info.

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