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chttpmodule-onpreexecuterequesthandler-method.md

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title CHttpModule::OnPreExecuteRequestHandler Method
description Describes the CHttpModule::OnPreExecuteRequestHandler method and provides its syntax, parameters, return value, remarks, and requirements.
ms.date 10/07/2016
ms.assetid 772fb3dc-e37d-f6fe-a2e8-c756bd35129f

CHttpModule::OnPreExecuteRequestHandler Method

Represents the method that will handle a PreExecuteRequestHandler event, which occurs before IIS executes a request handler.

Syntax

virtual REQUEST_NOTIFICATION_STATUS OnPreExecuteRequestHandler(  
   IN IHttpContext* pHttpContext,  
   IN IHttpEventProvider* pProvider  
);

Parameters

pHttpContext
[IN] A pointer to an IHttpContext interface.

pProvider
[IN] A pointer to an IHttpEventProvider interface.

Return Value

A REQUEST_NOTIFICATION_STATUS value.

Remarks

When a request-level module is registered for the RQ_PRE_EXECUTE_REQUEST_HANDLER event notification, IIS will call the module's OnPreExecuteRequestHandler method before IIS calls the execute handler for a request.

Note

Request-level modules can register for the PreExecuteRequestHandler event notification by registering for RQ_PRE_EXECUTE_REQUEST_HANDLER in the module's RegisterModule function.

Example

The following code example demonstrates how to create a request-level HTTP module that registers for the RQ_PRE_EXECUTE_REQUEST_HANDLER event and post-event notifications. Before IIS calls an execute handler, IIS will call the example module's OnPreExecuteRequestHandler and OnPostPreExecuteRequestHandler methods. This method will write an entry in the application log of the Windows Event Viewer and then exit.

[!code-cppCHttpModulePreExecuteRequestHandler#1]

Your module must export the RegisterModule function. You can export this function by creating a module definition (.def) file for your project, or you can compile the module by using the /EXPORT:RegisterModule switch. For more information, see Walkthrough: Creating a Request-Level HTTP Module By Using Native Code.

You can optionally compile the code by using the __stdcall (/Gz) calling convention instead of explicitly declaring the calling convention for each function.

Requirements

Type Description
Client - IIS 7.0 on [!INCLUDEwinvista]
- IIS 7.5 on Windows 7
- IIS 8.0 on Windows 8
- IIS 10.0 on Windows 10
Server - IIS 7.0 on [!INCLUDEwinsrv2008]
- IIS 7.5 on Windows Server 2008 R2
- IIS 8.0 on Windows Server 2012
- IIS 8.5 on Windows Server 2012 R2
- IIS 10.0 on Windows Server 2016
Product - IIS 7.0, IIS 7.5, IIS 8.0, IIS 8.5, IIS 10.0
- [!INCLUDEiisexp75], [!INCLUDEiisexp80], [!INCLUDEiisexp100]
Header Httpserv.h

See Also

CHttpModule Class
CHttpModule::OnPostPreExecuteRequestHandler Method