Re: [Cppcms-users] json_rpc and json questions

[Daniel V. <chi...@gm...>]

On Thu, 2011-05-19 at 00:07 -0700, Artyom Beilis wrote:

> 
> This is why it is virtual. You want pre/post-actions?
> 
>   void main(std::string param)
>   {
>       // some pre-action
>       cppcms::rpc::json_rpc_server::main(param);
>       // some post-actions
>   }
> 
> 


The privilege validations depends on session() object (user and his
rights) and method name. Then:

  void main(std::string param)
  {
     if( check_privileges(context()) )
     {
        cppcms::rpc::json_rpc_server::main(param);
     }
     else { 
         // not authorized
     }   
  }


So if I do just that, the request parsing is made ​​twice.  One for
obtain method name for check_privileges and another into
json_rpc_server::main() function.  I guess there are no other solution
in actual design. Is it true? 

One solution is give to the user of json_rpc_server class the
possibility to add pre action after parsing json request but before
dispatching. 

Thanks.