What is ASP.NET HttpRuntime

The httpRuntime element configures ASP.NET HTTP run-time settings that determine how a request for an ASP.NET application is processed and ASP.NET creates application domain for each web application that will run on a web server.

When a request comes in, ASP.NET loads the HTTP Runtime settings into process and create HTTPRuntime Object which is used to begin ASP.NET Pipeline model that process the web request and the ProcessRequest() method of HTTP Runtime starts the ASP.NET Page life cycle processing.

Here are few HTTPRuntime settings, which can be configured in web.config file

xml version="1.0"?>

<configuration>

  <system.web>  

    <httpRuntime executionTimeout="300" maxRequestLength="51200" targetFramework="4.6.1" maxQueryStringLength="2048" maxUrlLength="4096" />

  </system.web>

</configuration>

executionTimeout:

The executionTimeout property indicates the maximum number of seconds a request is allowed to execute before being automatically shut down by ASP.NET. The default is 110 seconds

  <system.web>  

    <httpRuntime executionTimeout="300"/>

  </system.web>

maxRequestLength:

The property maxRequestLength indicates the maximum file upload size supported by ASP.NET. This limit can be used to prevent denial of service attacks caused by users posting large files to the server. The size specified is in kilobytes. The default is 4096 KB (4 MB)

  <system.web>  

    <httpRuntime maxRequestLength="51200"/>

  </system.web>

targetFramework:

The property targetFramework indicates the version of the .NET Framework that the current web application targets

  <system.web>  

    <httpRuntime targetFramework="4.6.1"/>

  </system.web>

maxUrlLength:

The property maxUrlLength indicates the maximum length of the URL supported by ASP.NET, in bytes. The default value is 4096.

 <system.web>  

    <httpRuntime maxUrlLength="4096" />

  </system.web>

maxQueryStringLength :

The property maxQueryStringLength indicates the maximum length of the query string supported by ASP.NET, in bytes. The default value is 2048.

  <system.web>  

    <httpRuntime maxQueryStringLength="2048" />

  </system.web>