ASP. NET pipeline model

ASP. NET is composed of a pipeline model, which consists of multiple HTTP modules and an HTTP handler. In ASP. NET, You can have multiple modules that are being executed, but you can only have one handler that is being executed.

Asp.net processes HTTP requests as follows:

Httprequest --> inetinfo.exe --> response --> aspnet_wp.exe --> httpruntime --> httpapplication factory --> httpapplication --> httpmodule --> httphandler factory --> httphandler. processrequest ()

When an HTTP request arrives at the HTTP module, it does not actually process the request. You can append some information, intercept some information, or stop the request at this stage. After the HTTP handler is processed, You can process it again in the HTTP module and return the correct result to the client.