인프런 커뮤니티 질문&답변

김성현

작성한 질문수

Slack 클론 코딩[실시간 채팅 with React]

socket.io 이벤트 연결하기

소켓 이벤트 연결하기를 시청하다가 504 (Gateway Timeout) 오류가 떴습니다.

작성

524

안녕하세요 제로초님,

useEffect(() => {
        console.log('DMList: workspace 바꼈다', workspace);
        setOnlineList([]);
    }, [workspace]);

    useEffect(() => {
        socket?.on('onlineList', (data: number[]) => {
            console.log("data", data)
            setOnlineList(data);
        });
        // socket?.on('dm', onMessage);
        // console.log('socket on dm', socket?.hasListeners('dm'), socket);
        return () => {
            // socket?.off('dm', onMessage);
            // console.log('socket off dm', socket?.hasListeners('dm'));
            // socket?.off('onlineList');
        };
    }, [socket]);

여기까지 진행하고 슬랙앱을 봤을 때, (나) 여기에만 초록불이 잘 들어오는걸 확인했는데, 여기서 다른 탭을 갔다오거나 새로고침을 하면 제 생각엔 swr이 작동을 안하는 것 같습니다. userdata를 못받아와서 갑자기 loginpage로 튕겨져 나가는데, 쿠키는 남아있는데 계속 로딩중이라고 뜹니다. 백이랑 프론트 서버를 재시작하면 다시 되긴하는데, 채널을 옮기거나 하면 다시 오류가 시작되는데 이유를 못찾겠습니다.

프론트 쪽

백쪽

어디서 꼬인건지 잘 모르겠습니다. mutate쪽이 문제인가 싶어서 지워봤는데 똑같습니다..

웹팩 Socket.io typescript react babel 클론코딩

답변 2

김성현

질문자

Executing (default): SELECT id, email, nickname, password, createdAt, updatedAt, deletedAt FROM users AS User WHERE (`User`.`deletedAt` IS NULL AND User.`email` = 'lee123@naver.com');

Executing (default): SELECT id, nickname, email FROM users AS User WHERE (`User`.`deletedAt` IS NULL AND User.`id` = 8);

POST /api/users/login 200 255.278 ms - 55

Executing (default): SELECT User.`id`, User.`nickname`, User.`email`, Workspaces.`id` AS Workspaces.id, Workspaces.`name` AS Workspaces.name, Workspaces.`url` AS Workspaces.url, Workspaces.`createdAt` AS Workspaces.createdAt, Workspaces.`updatedAt` AS Workspaces.updatedAt, Workspaces.`deletedAt` AS Workspaces.deletedAt, Workspaces.`OwnerId` AS Workspaces.OwnerId, Workspaces->WorkspaceMember.`loggedInAt` AS Workspaces.WorkspaceMember.loggedInAt, Workspaces->WorkspaceMember.`createdAt` AS Workspaces.WorkspaceMember.createdAt, Workspaces->WorkspaceMember.`updatedAt` AS Workspaces.WorkspaceMember.updatedAt, Workspaces->WorkspaceMember.`WorkspaceId` AS Workspaces.WorkspaceMember.WorkspaceId, Workspaces->WorkspaceMember.`UserId` AS Workspaces.WorkspaceMember.UserId

FROM users AS User LEFT OUTER JOIN ( workspacemembers AS Workspaces->WorkspaceMember INNER JOIN workspaces AS Workspaces ON Workspaces.`id` = Workspaces->WorkspaceMember.`WorkspaceId`) ON User.`id` = Workspaces->WorkspaceMember.`UserId` AND (`Workspaces`.`deletedAt` IS NULL) WHERE (`User`.`deletedAt` IS NULL AND User.`id` = 8);

Executing (default): SELECT id, name, url, createdAt, updatedAt, deletedAt, OwnerId FROM workspaces AS Workspace WHERE (`Workspace`.`deletedAt` IS NULL AND Workspace.`url` = 'sleact');

Executing (default): SELECT Channel.`id`, Channel.`name`, Channel.`private`, Channel.`createdAt`, Channel.`updatedAt`, Channel.`WorkspaceId`, Members.`id` AS Members.id, Members->ChannelMembers.`ChannelId` AS Members.ChannelMembers.ChannelId, Members->ChannelMembers.`UserId` AS Members.ChannelMembers.UserId FROM channels AS Channel INNER JOIN ( ChannelMembers AS Members->ChannelMembers INNER JOIN users AS Members ON Members.`id` = Members->ChannelMembers.`UserId` AND Members->ChannelMembers.`UserId` = 8) ON Channel.`id` = Members->ChannelMembers.`ChannelId` AND (`Members`.`deletedAt` IS NULL) WHERE Channel.`WorkspaceId` = 1;

Executing (default): SELECT User.`id`, User.`nickname`, User.`email`, WorkspaceMember.`loggedInAt` AS WorkspaceMember.loggedInAt, WorkspaceMember.`createdAt` AS WorkspaceMember.createdAt, WorkspaceMember.`updatedAt` AS WorkspaceMember.updatedAt, WorkspaceMember.`WorkspaceId` AS WorkspaceMember.WorkspaceId, WorkspaceMember.`UserId` AS WorkspaceMember.UserId FROM users AS User INNER JOIN workspacemembers AS WorkspaceMember ON User.`id` = WorkspaceMember.`UserId` AND WorkspaceMember.`WorkspaceId` = 1 WHERE (`User`.`deletedAt` IS NULL);

GET /api/workspaces/sleact/channels 200 46.302 ms - 2114

GET /api/workspaces/sleact/members 200 49.981 ms - 666

GET /api/users 200 21.758 ms - 1317

C:\Users\kimsh\Desktop\github-scm\sleact\back\socket.js:23

channels.forEach((channel) => {

TypeError: Cannot read properties of undefined (reading 'forEach')

at Socket.<anonymous> (C:\Users\kimsh\Desktop\github-scm\sleact\back\socket.js:23:16)

at Socket.emit (node:events:513:28)

at C:\Users\kimsh\Desktop\github-scm\sleact\back\node_modules\socket.io\lib\socket.js:531:14

at process.processTicksAndRejections (node:internal/process/task_queues:77:11)

Node.js v18.12.0

[nodemon] app crashed - waiting for file changes before starting...

이렇게 나옵니다..

제로초(조현영)

지식공유자

프론트에서 socket.emit('login') 부분 코드 보여주세요. 거기서 channels가 백엔드로 전달되지 않았습니다.

김성현

질문자

// 로그인 했을 때만 요청할 수 있도록 조건부 요청
    const { data: channelData } = useSWR<IChannel[]>(userData ? `/api/workspaces/${workspace}/channels` : null, fetcher);
    const { data: memberData } = useSWR<IUser[]>(userData ? `/api/workspaces/${workspace}/members` : null, fetcher);

    const [socket, disconnect] = useSocket(workspace);

    useEffect(() => {
        if (channelData && userData && socket) {
            socket.emit('login', { id: userData.id, channelData: channelData.map(v => v.id) })
        }
    }, [channelData, userData, socket]);

    useEffect(() => {
        return () => {
            disconnect();
        }
    }, [workspace, disconnect]);

초기에는 작동하는데 다른동작을 하면 못받아옵니다

제로초(조현영)

지식공유자

emit에 넣는 객체의 키가 channelData가 아니라 channels입니다

김성현

질문자

정말 감사합니다 ㅠㅠ 잘 되는것 같습니다.

제로초(조현영)

지식공유자

백엔드쪽 에러라서 백엔드 로그를 더 봐야하는데요. 저게 전부인가요??

김성현

작성한 질문수

전체 Q&A

질문하기