Why handlers in asp.net

NET request pipeline and the Web server request pipeline can be integrated into a common request pipeline. The unified pipeline has several benefits for ASP. NET developers. For example, it lets managed-code modules receive pipeline notifications for all requests, even if the requests are not for ASP.

NET resources. However, if you want, you can run IIS 7. For more information, see ASP. However, they are written in managed code and are fully integrated with the life cycle of an ASP.

NET application. NET uses modules to implement various application features, which includes forms authentication, caching, session state, and client script services. In each case, when those services are enabled, the module is called as part of a request and performs tasks that are outside the scope of any single page request. Modules can consume application events and can raise events that can be handled in the Global.

For more information about application events, see ASP. An HTTP handler returns a response to a request that is identified by a file name extension or family of file name extensions. In contrast, an HTTP module is invoked for all requests and responses. It subscribes to event notifications in the request pipeline and lets you run code in registered event handlers. The tasks that a module is used for are general to an application and to all requests for resources in the application.

Modules must be registered to receive notifications from the request pipeline. When ASP. NET creates an instance of the HttpApplication class that represents your application, instances of any modules that have been registered are created. When a module is created, its Init method is called and the module initializes itself.

In a module's Init method, you can subscribe to various application events such as BeginRequest or EndRequest by binding the events to methods in the module. For modules that operate in the IIS 7. When application events are raised, the appropriate method in your module is called. The method can perform whatever logic is required, such as checking authentication or logging request information.

During event handling, the module has access to the Context property of the current request. This enables you to redirect the request to an alternative page, modify the request, or perform any other request manipulation.

For example, if the module checks authentication, the module might redirect to a login or error page if the credentials are not correct.

Otherwise, when the module's event handler has finished running, ASP. NET calls the next process in the pipeline. This might be another module or might be the appropriate HTTP handler such as an. You can implement much of the functionality of a module in the application's Global. However, modules have an advantage over the Global. By adding them to the global assembly cache and registering them in the Machine. For more information, see Global Assembly Cache. Event handlers in the Global.

Custom modules in Integrated mode can be explicitly scoped to receive event notifications only for requests to the application.

Otherwise, custom modules receive event notification for all requests to the application. If the precondition attribute of the add element of the modules section is set to "managedHandler", the module is scoped to the application. The advantage of using the Global. In addition, the Global. You should use a module whenever you must create code that depends on application events, and when the following conditions are true:.

You should add code in the Global. You can also use the Global. Create a class that implements the IHttpModule interface.

You will find a requestLog. So in simple words, an HttpModule will execute for every request of your application, irrespective of the extension used. Http Modules are generally used for security, statistics, logging etc. This article has been editorially reviewed by Suprotim Agarwal. C and. Organized around concepts, this Book aims to provide a concise, yet solid foundation in C and.

NET, covering C 6. NET Core, with chapters on the latest. NET Core 3. NET Standard and C 8. Use these concepts to deepen your existing knowledge of C and. NET, to have a solid grasp of the latest in C and. NET OR to crack your next. NET Interview. Views: NET Interview question. The Absolutely Awesome. NET Interview Book. NET architecture but bypass the web-page model. The result is a leaner, more efficient component. What is HTTP module: Help in processing of page request by handing application events , similar to what global.

How to write custom HTTP handler: Step 1: What all we need to know before writing handlers There are two type of handler you actually can make. Further these Interfaces require us to implement the ProcessRequest method and the IsReusable property. Step 2: Create a ASP. Type: identifies the HTTP handler class. This identification consists of two portions. First is the fully qualified class name , That portion is followed by a comma and the name of the DLL assembly that contains the class.

Well yes. In visual studio we have a new item template to accomplish this. For this we can use the recognized extension. All requests that end in. What is leeching: sites that steal bandwidth by linking to resources on your server.