IP取得

ipアドレス取得

//クライアントipをチェックするための関数
function ipchecker(req){

    var ip ='192.168.0.4.';
    var pointer = 0;
    if(req.headers['x-forwarded-for']) {
      if(req.headers['x-forwarded-for'].indexOf(ip)>-1){
        pointer = req.headers['x-forwarded-for'].indexOf(ip);
        ip = req.headers['x-forwarded-for'].slice(pointer);
        console.log("1mid");
        return ip;
      }
      console.log("1out");
      return req.headers['x-forwarded-for'];
    }

    if(req.connection && req.connection.remoteAddress) {
      if(req.connection.remoteAddress.indexOf(ip)>-1){
        pointer = req.connection.remoteAddress.indexOf(ip);
        console.log(ip);
        ip = req.connection.remoteAddress.slice(pointer);
        console.log("2mid");
        return ip;
      }
      console.log("2out");
      return req.connection.remoteAddress;
    }

    if(req.connection.socket && req.connection.socket.remoteAddress) {
      if(req.connection.socket.remoteAddress.indexOf(ip)>-1){
        pointer = req.connection.socket.remoteAddress.indexOf(ip);
        ip = req.connection.socket.remoteAddress.slice(pointer);
        console.log("3mid");
        return ip;
      }
      console.log("3out");
      return req.connection.socket.remoteAddress;
    }

    if(req.socket && req.socket.remoteAddress) {
     if(req.socket.remoteAddress.indexOf(ip)>-1){
      pointer = req.socket.remoteAddress.indexOf(ip);
      ip = req.socket.remoteAddress.slice(pointer);
      console.log("4mid");
      return ip;
    }
    console.log("4out");  
    return req.socket.remoteAddress;
  }


  return '0.0.0.0';
}