asp.net address mapping-pseudo-static

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asp.net address mapping is defined as the actual file of the virtual address map that the user accesses, and the virtual address may be a static page. For example: In the visit to the Http://fuzhou.naoqiu.com/bus page, actually visit the/bus.aspx page.

asp.net address mapping is done through the HttpModule request principle.

What is the HttpModule principle?

An HTTP request passes the HTTP request to the HttpHandler container at a time (Resolverequestcache event) during the delivery of the HttpModule container. After this event, the HttpModule container creates a HttpHandler entry instance, but the HTTP request control is not surrendered at this time. Instead, it continues to trigger acquirerequeststate events and Prerequesthandlerexcute events. After the Prerequesthandlerexcute event, the HttpModule window temporarily hands control to the HttpHandler container for real HTTP request processing.

The ProcessRequest method is executed inside the HttpHandler container to process the HTTP request. After the container HttpHandler processes the entire HTTP request, the control is returned to Httpmodule,httpmodule, which continues to layer the forwarding of the processed HTTP request flow until it is returned to the client.

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After I understand the principle, I'll complete a simple address map with the following code:

First complete the address map base class:

<summary>

Address Rewriting

</summary>

Public abstract class Basemodulerewriter:ihttpmodule

{

<summary>

Initialization call

</summary>

<param name= "App" ></param>

public virtual void Init (HttpApplication app) {

App. BeginRequest + = new EventHandler (app_beginrequest);

}

public virtual void Dispose () {}

<summary>

Request Start

</summary>

<param name= "Sender" ></param>

<param name= "E" ></param>

protected virtual void App_beginrequest (object sender, EventArgs e)

{

HttpApplication app = sender as HttpApplication;

Rewrite (APP);

}

<summary>

Abstract method of operation

</summary>

<param name= "App" ></param>

protected abstract void Rewrite (HttpApplication app);

}

Inheriting base class, completing the need for address mapping operations:

protected override void Rewrite (HttpApplication app)

{

HttpContext context = App. context;

HttpRequest request = App. Request;

String part = Regex.match (Request. Url.tostring (), @ "(? <=http\:\/\/). *"). Value.tolower (). Trim ('/');

if (part. IndexOf ("/") = = 1)

{

Part = Regex.match (part, @ "^\w+"). Value;

Switch (part)

{

Case ' bus ': Context. RewritePath ("/bus.aspx"); Break;

Case "www":

Case "Naoqiu": the context. RewritePath ("/default.aspx"); Break;

Default:context. RewritePath ("/index_city.aspx"); Break;

}

}

}

So what are we going to do? Yes, it's a configuration file. There are several places to modify Web.config files, such as:

<!--request Rules-->

<httpModules>

<add name= "Bianminmodulerewriter"
Type= "Bianmin.urlrewriter.modulerewriter,bianmin.urlrewriter"/>

</httpModules>

<system.webServer>

<handlers>
<add name= "Aspnet_isapi" path= "*" verb= "*" modules= "isapimodule" script processor= "C:\Windows\Microsoft.NET\ Framework64\v4.0.30319\aspnet_isapi.dll "resourcetype=" Unspecified "requireaccess=" None "precondition=" Classicmode,runtimeversionv4.0,bitness64 "/>
</handlers>

<defaultDocument>

<files>

<clear/>

<add value= "default.aspx"/>

</files>

</defaultDocument>

</system.webServer>

Note: When you use Framewore 2..0 you need to change the \aspnet_isapi.dll file path

Source code Download Address: http://download.naoqiu.com download