first commit

历届学生/18课程/class18_2/项目/上课项目/聊天室/backend/index.js

@@ -0,0 +1,63 @@
+const { log } = require('console');
+
+var app = require('express')();
+var http = require('http').createServer(app);
+var io = require('socket.io')(http);
+
+
+app.get('/', (req, res) => {
+    res.send('<h1>Hello world</h1>');
+});
+
+var onlineUserList = []
+
+
+//如果有客户端连接了 connection
+io.on('connection', (socket) => {
+    socket.on("login", function(res) {
+        if (onlineUserList.length == 0) {
+            onlineUserList.push(res);
+            socket.emit("LoginSuccess", res);
+        } else {
+            var u = onlineUserList.filter(v => {
+                if (v.name == res.name) {
+                    return v
+                }
+            });
+
+            if (u.length != 0) {
+                socket.emit("userNameExists");
+            } else {
+                onlineUserList.push(res);
+                socket.emit("LoginSuccess", res);
+            }
+        }
+    });
+  
+    socket.on("JoinRoom",function(res) {
+        socket.join(res.roomid);
+        var Online = onlineUserList.filter(v=> {
+            if (v.roomid == res.roomid) {
+                return v
+            }
+        });
+        io.in(res.roomid).emit("OnLineUserList", Online);
+        io.in(res.roomid).emit("WelcomeUser", `欢迎用户${res.name}加入群聊`);
+    });
+
+    socket.on("shake",function(res) {
+        console.log("shake1: ",res);
+        socket.to(res.roomid).emit("addShake", "");
+    })
+
+    socket.on("sendMessage",function(res) {
+        console.log("用户的聊天内容：", res);
+        socket.to(res.roomid).emit('SetMessage', res);
+    })
+
+});
+
+
+http.listen(1314, () => {
+    console.log('listening on *:1314');
+});