Custom URL rewriting 04.18

1. Define XML rules and configure URL nodes

 ? XML version = "1.0" encoding = "UTF-8"?>     URLs  >    rewrite   name   =" shownews "  pattern   =" news-(\ d00000000.html "  page   =" News. aspx "  query  =" id = $1 " >    rewrite  >    URLs  > 

 

2. parse XML and encapsulate it

   Public   Class  Myurlrewrite {  Public   String Name { Get ; Set  ;}  Public   String Pattern { Get ; Set ;}  Public   String Page { Get ; Set  ;}  Public   String Query { Get ; Set  ;}}  Public   Class  Urllist {  Private  Static  Urllist instance;  Public List <myurlrewrite> Getallurls {  Get  ;  Set  ;}  Private  Urllist () {getallurls = New List <myurlrewrite> (); Xmldocument xmldoc = New Xmldocument ();  String Xmlpath = httpcontext. Current. Request. physicalapplicationpath + "  /Urllink. config  "  ; Xmldoc. Load (xmlpath); xmlnode Node = Xmldoc. selectsinglenode ( "  URLs  "  );  Foreach (Xmlnode item In Node. childnodes) {xmlattribute name = Item. attributes [ "  Name  "  ]; Xmlattribute Pattern = Item. attributes [ "  Pattern  "  ];  Xmlattribute page = Item. attributes [ "  Page  " ]; Xmlattribute Query = Item. attributes [ "  Query  "  ];  If (Name = Null | Pattern = Null | Query = Null | Pattern = Null  )  Continue  ; Myurlrewrite Model =New  Myurlrewrite (); Model. Name = Name. value; model. Pattern = Pattern. value; model. Page = Page. value; model. Query = Query. value; getallurls. Add (model );}}  Public   Static  Urllist geturllist (){  If (Instance = Null ) {Instance = New  Urllist ();}  Return  Instance ;}} 

3. Customize the ihttpmodule interface to implement URL rewriting. [I will not talk about this interface more, but there are a lot on the Internet]

  /*  ** Provide module initialization and event processing for implementation Classes *  */       Public   Class  Myhttpmodule: system. Web. ihttpmodule { # Region Ihttpmodule Member //  Dispose of resources used by modules implementing ihttpmodule (excluding memory ).          Public   Void  Dispose (){  Throw   New  Notimplementedexception ();}  //  Initialize the module and make it ready to process requests.          Public   Void  Init (httpapplication context) {context. beginrequest + = New  Eventhandler (context_beginrequest );}  Void Context_beginrequest ( Object  Sender, eventargs e) {httpcontext Context = (Httpapplication) sender). context;  String Requestpath = Context. Request. Path. tolower ();  Foreach (Myurlrewrite item In  Urllist. geturllist (). getallurls ){ //  Not distinguished by sizeWrite                  If  (RegEx. ismatch (requestpath, item. pattern, regexoptions. ignorecase )){  String Newurl = RegEx. Replace (requestpath, item. pattern, item. query );  If (Newurl. Length = 0  ) Context. rewritepath (item. Page );  Else  Context. rewritepath (item. Page + "  ?  " + Newurl. substring ( 1  ));}}}  # Endregion  } 

4. Configure web. config

<Httpmodules><AddName= "Urlrewrite"Type= "_ 017_url rewrite. myhttpmodule, 017_url Rewrite"/></Httpmodules>
 

5. Final

 

Summary:

1. It is important to understand the pipelines and lifecycles of Asp.net.

2. SetProgramConfigurable, avoid always modifying the demo, and use XML to define rules

3. The most important thing is that the Lakers have entered the playoffs, but kobe is injured.