CNA to Safari

## CNA to Safari
with AWS.Status;
with AWS.Response;

package Worker_Echoes.Apple.Captive is

   function Service (Request : AWS.Status.Data)
     return AWS.Response.Data;

end Worker_Echoes.Apple.Captive;


with Ada.Strings.Fixed;

with AWS.URL;
with AWS.Messages;

with Worker_Echoes.Protected_Strings;
with Worker_Echoes.Config;

package body Worker_Echoes.Apple.Captive is

   use AWS;
   use all type AWS.Messages.Status_Code;

   Last_CNA_CNS_Peername : Protected_Strings.Protected_String;

   -------------
   -- Service --
   -------------

   function Service (Request : Status.Data) return Response.Data is
      URL_Object : constant URL.Object := Status.URI (Request);
      URL_String : constant String := URL.URL (URL_Object);
      User_Agent : constant String := Status.User_Agent (Request);
   begin
      if User_Agent'Length >= 6 and then User_Agent (User_Agent'Last - 5 .. User_Agent'Last) = " wispr" then
         if Last_CNA_CNS_Peername.Get = Status.Peername (Request) then
            return Response.Build
              (Status_Code => S200,
               Content_Type => "text/html; charset=utf-8",
               Message_Body => "<HTML><HEAD><TITLE>Success</TITLE></HEAD><BODY>Success</BODY></HTML>");
         elsif URL_String = "http://captive.apple.com/hotspot-1.html" then
            return Response.Build
              (Status_Code => S200,
               Content_Type => "text/html; charset=utf-8",
               Message_Body => "<HTML><HEAD></HEAD><BODY></BODY></HTML>");
         else
            return Response.URL ("http://captive.apple.com/hotspot-1.html");
         end if;
      elsif Ada.Strings.Fixed.Index (User_Agent, "Safari") = 0 then
         Last_CNA_CNS_Peername.Set (Status.Peername (Request));

         -- 1. Not sure if intact "<BODY>Success</BODY>" matters, but probably yes.
         -- 2. There was no delay previously, thus A had to be created before BODY is processed.
         --    Now it's possible to click A with id, but touching working code was avoided.
         return Response.Build
           (Status_Code => S200,
            Content_Type => "text/html; charset=utf-8",
            Message_Body => "<HTML><HEAD><SCRIPT>" &
                               "window.setTimeout (function () {" &
                                  "var A = document.createElement (""a"");" &
                                  "A.setAttribute (""href"", ""http://captive.apple.com/hotspot-2.html"");" &
                                  "var Body = document.getElementsByTagName (""body"");" &
                                  "if (Body.length > 0) {" &
                                     "Body = Body [0];" &
                                  "} else {" &
                                     "Body = document.createElement (""body"");" &
                                     "document.getElementsByTagName (""html"") [0].appendChild (Body);" &
                                  "}" &
                                  "Body.appendChild (A);" &
                                  "A.click ();" &
                               "}, 1000);" &
                            "</SCRIPT>" &
                            "<STYLE>body { display: none; }</STYLE>" &
                            "<TITLE>Success</TITLE></HEAD><BODY>Success</BODY></HTML>");
      else
         Protected_Strings.Reset (Last_CNA_CNS_Peername, Status.Peername (Request)); -- reset if matches
         return Response.URL (Config.Get_Target_URL);
      end if;
   end Service;

end Worker_Echoes.Apple.Captive;