Merge branch 'develop' of http://khuhub.khu.ac.kr/2020105578/nodejs-game into develop

@@ -14,7 +14,11 @@ export class Server {
 
     const app = express();
     const server = createServer(app);
-    this.io = new socketIo.Server(server);
+    this.io = new socketIo.Server(server, {
+      cors: {
+        origin: '*'
+      }
+    });
 
     const roomManager = new RoomManager();
 

@@ -21,7 +21,7 @@ export const Login: React.FC = () => {
           console.error('login error!'); // TODO: 팝업 에러?
         }
       });
-    }, []);
+    }, [username]);
 
     return (
       <Main>

 import React, { useCallback, useContext, useEffect, useState } from 'react';
+import { useHistory } from 'react-router';
 import { Main } from '../components/common/Main';
 import { MessageResponse, MessageType, RawMessage } from '../components/common/types';
 import { RoomBlock } from '../components/rooms/RoomBlock';
@@ -6,6 +7,7 @@ import { Room } from '../components/rooms/types';
 import SocketContext from '../contexts/SocketContext';
 
 export const Rooms: React.FC = () => {
+  const history = useHistory();
   const socket = useContext(SocketContext);
   const [ rooms, setRooms ] = useState<Room[]>([]);
 
@@ -18,9 +20,8 @@ export const Rooms: React.FC = () => {
       if (response.ok) {
         setRooms(response.result!);
       } else {
-        // TODO: 에러 핸들링
-        console.log("방 목록을 수신하지 못함");
-        console.log(response);
+        // 로그인하지 않고 방 목록으로 왔다고 판단
+        history.push('/');
       }
     });
   }, []);