first commit

历届学生/逯帅帅/项目开发/上课项目/聊天室/backend/index.js

@@ -0,0 +1,44 @@
+const app = require("express")();
+const httpServer = require("http").createServer(app);
+const io = require("socket.io")(httpServer, {});
+
+// 保存在线用户数据
+var userOnline = []
+
+io.on("connection", socket => {
+  console.log("有一个客户端建立了链接");
+
+
+  socket.on("login", (res) => {
+    console.log(res);
+    var isHave =  userOnline.filter((val,index) => {
+      return val.username == res.username
+    });
+    if (isHave.length > 0) {
+      socket.emit("UserNameExist");
+    } else {
+      userOnline.push(res);
+      socket.join(res.roomid);
+      socket.emit("LoginSuccess");
+    }
+  });
+
+  socket.on("getUserOnline", (id) => {
+    console.log("房间号：",id)
+    console.log("UserOnline：",userOnline)
+    socket.join(id);
+    // socket.emit("UserOnline", userOnline);
+    io.in(id).emit("UserOnline", userOnline);
+  });
+
+  socket.on("getMessage", (res) => {
+    socket.to(res.roomid).emit("sedMessage", res);
+  });
+
+
+
+});
+
+
+
+httpServer.listen(3000);