A simple and efficient URL rewriting solution with flexible configuration (with source code)

Download Code: http://www.ssxz.com/iuhxq/index.html

By referencing urlrewrite. dll, you only need to add two lines to rewrite the URL.

Key code:
Public class myhttpmodule: ihttpmodule
{
Public void Init (httpapplication APP)
{
App. authorizerequest + = new eventhandler (app_authorizerequest );
}

Public void dispose (){}

Protected void rewrite (string requestedpath, system. Web. httpapplication APP)
{
// App. Context. rewritepath ("~ /Default. aspx ", String. Empty," test = tttttttt ");
Foreach (urlrewrite URL in siteurls. getsiteurls (). URLs)
{
If (RegEx. ismatch (App. Context. Request. Path, URL. pattern, regexoptions. Compiled | regexoptions. ignorecase ))
{
App. context. rewritepath (URL. page, String. empty, RegEx. replace (App. context. request. path, URL. pattern, URL. querystring, regexoptions. compiled | regexoptions. ignorecase ));
Return;
}
}
If (App. Context. Request. Path. tolower (). endswith (". shtml "))
{
App. Context. response. Redirect ("~ /Index.html ");
}
}

Private void app_authorizerequest (Object sender, eventargs E)
{
Httpapplication APP = (httpapplication) sender;
Rewrite (App. Request. Path, APP );
}
}

Public class siteurls
{
# Region internal attributes and Methods
String siteurlsfile = httpcontext. Current. server. mappath (configurationsettings. deleettings ["siteurls"]);
Private arraylist _ URLs;
Public arraylist URLs
{
Get
{
Return _ URLs;
}
Set
{
_ URLs = value;
}
}

Private namevaluecollection _ paths;
Public namevaluecollection paths
{
Get
{
Return _ paths;
}
Set
{
_ Paths = value;
}
}

Private siteurls ()
{
String applicationpath = httpcontext. Current. Request. applicationpath;

If (applicationpath = "/")
{
Applicationpath = string. empty;
}

URLs = new arraylist ();
Paths = new namevaluecollection ();
Paths. Add ("home", applicationpath );

Xmldocument xml = new xmldocument ();

XML. Load (siteurlsfile );

Xmlnode root = xml. selectsinglenode ("siteurls ");
Foreach (xmlnode N in root. childnodes)
{
If (N. nodetype! = Xmlnodetype. Comment & N. Name. tolower () = "Rewrite ")
{
Xmlattribute name = n. attributes ["name"];
Xmlattribute Path = n. attributes ["path"];
Xmlattribute page = n. attributes ["page"];
Xmlattribute querystring = n. attributes ["querystring"];
Xmlattribute pattern = n. attributes ["pattern"];

If (name! = NULL & path! = NULL & page! = NULL & querystring! = NULL & pattern! = NULL)
{
Paths. Add (name. Value, applicationpath + path. value );
URLs. add (New urlrewrite (name. value, paths ["home"] + pattern. value, paths ["home"] + Page. value. replace ("^", "&"), querystring. value. replace ("^ ","&")));
}
}
}
}
# Endregion

Public static siteurls getsiteurls ()
{
String cachekey = "siteurls ";
Siteurls URLs = system. Web. httpcontext. Current. cache ["siteurls"] As siteurls;
If (URLs = NULL)
{
URLs = new siteurls ();
System. Web. httpcontext. Current. cache. insert (cachekey, URLs, new cachedependency (URLs. siteurlsfile), datetime. maxvalue, timespan. Zero, cacheitempriority. High, null );
}

Return URLs;
}

/// <Summary>
/// Output URL example
/// </Summary>
/// <Param name = "ID"> </param>
/// <Returns> </returns>
Public String show (int id)
{
Return string. Format (paths ["show"], ID );
}

Public class urlrewrite
{
# Region member variables
Private string _ name;
Public string name
{
Get
{
Return _ name;
}
Set
{
_ Name = value;
}
}

Private string _ pattern;
Public String Pattern
{
Get
{
Return _ pattern;
}
Set
{
_ Pattern = value;
}
}

Private string _ page;
Public String page
{
Get
{
Return _ page;
}
Set
{
_ Page = value;
}
}

Private string _ querystring;
Public String querystring
{
Get
{
Return _ querystring;
}
Set
{
_ Querystring = value;
}
}
# Endregion

# Region Constructor
Public urlrewrite (string name, string pattern, string page, string querystring)
{
_ Name = Name;
_ Pattern = pattern;
_ Page = page;
_ Querystring = querystring;
}
# Endregion
}

Public class pagebase: Page
{
//// <Summary>
/// Rewrite the default htmltextwriter method, modify the value attribute in the form tag, and set the value to the rewritten URL instead of the real URL.
/// </Summary>
/// <Param name = "Writer"> </param>
Protected override void render (htmltextwriter writer)
{

If (writer is system. Web. UI. html32textwriter)
{
Writer = new formfixerhtml32textwriter (writer. innerwriter );
}
Else
{
Writer = new formfixerhtmltextwriter (writer. innerwriter );
}

Base. Render (writer );
}
}

Internal class formfixerhtml32textwriter: system. Web. UI. html32textwriter
{
Private string _ URL; // a false URL

Internal formfixerhtml32textwriter (textwriter writer): Base (writer)
{
_ Url = httpcontext. Current. Request. rawurl;
}

Public override void writeattribute (string name, string value, bool encode)
{
// If the current output attribute is the form-marked action attribute, replace the value with the rewritten false URL
If (_ URL! = NULL & string. Compare (name, "action", true) = 0)
{
Value = _ URL;
}
Base. writeattribute (name, value, encode );
}
}

Internal class formfixerhtmltextwriter: system. Web. UI. htmltextwriter
{
Private string _ URL;
Internal formfixerhtmltextwriter (textwriter writer): Base (writer)
{
_ Url = httpcontext. Current. Request. rawurl;
}

Public override void writeattribute (string name, string value, bool encode)
{
If (_ URL! = NULL & string. Compare (name, "action", true) = 0)
{
Value = _ URL;
}

Base. writeattribute (name, value, encode );
}
}

Rewrite the configuration file:

<? XML version = "1.0" encoding = "UTF-8"?>
<Siteurls>
<! -- If you want to override the shtml extension, you need to adjust the application ing in IIS to map the shtml extension to C:/Windows/Microsoft. net/framework/v1.1.4322/aspnet_isapi.dll. Check whether the file exists. -->
<! -- Access method http: // localhost/example/show/323.shtml -->
<Rewrite name = "show"
Path = "/show/clusters 02.16.shtml"
Pattern = "/show/(/d1_0000.shtml"
Page = "/webform1.aspx"
Querystring = "id = $1 ^ Cn = itemlist"/>

</Siteurls>

Add the following content to Web. config:

<Deleetask>
<Add key = "siteurls" value = "~ /Siteurls. config "/>
</Appsettings>

<Httpmodules>
<Add name = "myhttpmodule" type = "urlrewrite. myhttpmodule, urlrewrite"/>
</Httpmodules>