Httpmodule Event Sequence and execution sequence

 

In general, the following events are triggered in sequence.

Beginrequest
Authenticaterequest
Authorizerequest
Resolverequestcache
Acquirerequeststate
Prerequesthandlerexecute
Postrequesthandlerexecute
Releaserequeststate
Updaterequestcache
Endrequest
In addition, there are three uncertain orders:
Presendrequestheaders
Presendrequestcontent
Error

So what happens after we register multiple modules?

For example:
If you have configured two httpmodules in Web. config: httpmodulea and httpmoduleb
The event execution sequence is as follows:
Httpmodulea-> beginrequest
Httpmoduleb-> beginrequest
Httpmodulea-> authenticaterequest
Httpmoduleb-> authenticaterequest
Httpmodulea-> authorizerequest
Httpmoduleb-> authorizerequest
... And so on

 

Of course, the default modules in the system are always executed before the custom modules.

Framework default module (c: \ windows \ microsoft.net \ framework \ v2.0.50727 \ config \ WEB. config)

<Httpmodules> <Add name = "Outputcache" Type = "System. Web. caching. outputcachemodule" /> <Add name = "Session" Type = "System. Web. sessionstate. sessionstatemodule" /> <Add name = "Windowsauthentication" Type = "System. Web. Security. windowsauthenticationmodule" /> <Add name = "Formsauthentication" Type = "System. Web. Security. formsauthenticationmodule" /> <Add name = "Passportauthentication" Type ="System. Web. Security. passportauthenticationmodule" /> <Add name = "Rolemanager" Type = "System. Web. Security. rolemanagermodule" /> <Add name = "Urlauthorization" Type = "System. Web. Security. urlauthorizationmodule" /> <Add name = "Fileauthorization" Type = "System. Web. Security. fileauthorizationmodule" /> <Add name = "Anonymousidentification" Type = "System. Web. Security. anonymousidentificationmodule" /> <Add name = "Profile" Type ="System. Web. profile. profilemodule" /> <Add name = "Errorhandlermodule" Type = "System. Web. Mobile. errorhandlermodule, system. Web. Mobile, version = 2.0.0.0, culture = neutral, publickeytoken = b03f5f7f11d50a3a" /> <Add name = "Servicemodel" Type = "System. servicemodel. Activation. httpmodule, system. servicemodel, version = 3.0.0.0, culture = neutral, publickeytoken = b77a5c561934e089" /> </Httpmodules>