MVC creates and registers an anti-theft chain

Create Customhandler.jpghandler

 Public classjpghandler:ihttphandler{ Public voidProcessRequest (HttpContext context) {Try         {             //get the file server-side physical path             stringFileName =context. Server.MapPath (context.             Request.filepath); //if Urlreferrer is empty, a picture of the default forbidden hotlinking is displayed             if(Context. Request.UrlReferrer.Host = =NULL) {context. Response.ContentType="Image/jpeg"; Context. Response.WriteFile ("/error.jpg"); }             Else             {                 //If the urlreferrer does not contain its own site host domain name, a default forbidden hotlinking picture is displayed                 if(Context. Request.UrlReferrer.Host.Contains ("localhost")) {context. Response.ContentType="application/pdf"; Context.                 Response.WriteFile (FileName); }                 Else{context. Response.ContentType="Image/jpeg"; Context. Response.WriteFile ("/error.jpg"); }             }         }         Catch(Exception ex) {context. Response.ContentType="Image/jpeg"; Context. Response.WriteFile ("/error.jpg"); }     }      Public BOOLisreusable {Get{return true; } }}

Reference the compiled DLL file in the project and register the handler in the project

  <system.webServer>      "Myjpghandler" path= " *.jpg " verb="*" type="Customhandler.jpghandler, Customhandler  " />      
MVC creates and registers an anti-theft chain