在 socket.io 和 express(node.js) 上獲取 CORS EROOR

Question

Socket.io 和 Node.js (express.js) 得到 CORS 錯誤

 let io;
    module.exports = {
      init: (httpServer) => {
        io = require("socket.io")(httpServer);
        return io;
      },
      getIO: () => {
        if (!io) {
          throw new Error("Socket.io not inittialized");
        }
    return io;
  },
};

Answer 1

在必須發送的套接字 js 中嘗試此代碼

cors: {
       origin: "*",
       methods: ["GET", "POST"],
      }, 

套接字中的Cors也避免了這個錯誤

  let io;
    module.exports = {
      init: (httpServer) => {
        io = require("socket.io")(httpServer, {
          cors: {
            origin: "*",
            methods: ["GET", "POST"],
          },
        });
        return io;
      },
      getIO: () => {
        if (!io) {
          throw new Error("Socket.io not inittialized");
        }
        return io;
      },
    };