whois

 

 

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import 'dart:io'; import 'dart:convert';   main()async{   List a = 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    for(int i=0; i<a.length; i++){     Whois w = Whois(domain: a[i]);     await w.getWhois();   } }         class Whois{   Whois({this.domain});   Socket socket;   String domain;   bool dataFinished = false;   bool doneFinished = false;   bool getData = false;   String s = 'start:';     Future getWhois()async{     await request();     while(!dataFinished){       await Future.delayed(Duration(milliseconds: 100));     }   }     Future request()async{     dataFinished = false;     doneFinished = false;     getData = false;       try {       socket = await Socket.connect('whois.cnnic.net.cn', 43);       socket.listen(onData, onError: onError, onDone: onDone);       print('============================================================================================================');       print('$s $domain');       socket.write(domain + '\n');     }catch(e){       print('from request error: ${e.toString()}');       print('waiting 2 seconds');       sleep(Duration(seconds: 2));     }   }     void onError(e){     print('===================== error ==============================');     print('from error side: ${e.toString()}');     errorFinished = true;   }     void onData(value)async{     getData = true;     String data = utf8.decode(value);     print('===================== WHOIS ==============================');     if(data.contains('interval')){       print('system notice too fast, wait 2 seconds');       socket.destroy();       sleep(Duration(seconds: 2));       s = 'restart';       await request();     }else{       print('not find interval');       dataFinished = true;       print('whois:::::::: ${data.substring(0, 18)}');     }   }     onDone()async{     int t = 1;     print('mmmmmmmmmmmmmmmmmmmmm DONE mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm');     sleep(Duration(milliseconds: 100));     while(t<5){         if(getData == false){         print('wairint data from onDone function: $t');         sleep(Duration(milliseconds: 50));         t++;       }else{         t = 5;       }       }     if(getData == false){       socket.destroy();       print('wait too long time without response, wait 2 second to restart.');       sleep(Duration(seconds: 2));       s = 'restart';       await request();     }     } }