node.js - Socket.io : sending to all clients in a namespace,(不包括发件人)

Question

我已经从socket.io官方网站上看到了这个socket.io cheatsheet，并且在堆栈溢出时在这里得到了一些答案。我没有找到想要的答案。

我如何发送给命名空间中的所有客户端(发件人除外)？

Answer 1

如果套接字连接到 namespace ，则可以使用socket.broadcast.emit转发消息

const app = require("express")();
const http = require("http").createServer(app);
const PORT = 3000;
const io = require("socket.io")(http);

app.get("/", (req, res) => {
  res.send("<h1>This is a socket io server</h1>");
});

http.listen(PORT, () => {
  console.log(`Listening on port ${PORT}`);
});

io.of("/").on("connection", function(socket) {
});

io.of("chat").on("connection", function(socket) {
  socket.on("message", data => {
    // socket is connected to namespace so just broadcast the emit to other clients in the namespace
    socket.broadcast.emit("message", {
      user: socket.id,
      message: data.message
    });
  });
});