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如何在node的express中使用socket.io，nodesocket.io
伺服器端server.js代碼
複製代碼 代碼如下:
var express=require("express");
var http=require("http");
var sio=require("socket.io");
var app=express();
var server=http.createServer(app);
var fs=require("fs");
app.get("/", function (req,res) {
res.sendfile(__dirname+"/index.html");
});
server.listen(1337);
var socket=sio.listen(server);
socket.on("connection", function (socket) {
socket.emit("news",{hello:"你好"});
socket.on("otherEvent", function (data) {
console.log("伺服器端接受到資料:%j",data);
})
});
用戶端index.html代碼
複製代碼 代碼如下:
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<script src="/socket.io/socket.io.js"></script>
<script>
var socket=io.connect();
socket.on("news", function (data) {
console.log(data.hello);
socket.emit("otherEvent",{my:"data"});
});
</script>
</head>
<body>
</body>
</html>
忽然想到一個問題.我可不可以把news的監聽代碼寫到和emit的同一端.
這樣:
複製代碼 代碼如下:
var express=require("express");
var http=require("http");
var sio=require("socket.io");
var app=express();
var server=http.createServer(app);
app.get("/", function (req,res) {
res.sendfile(__dirname+"/index.html");
});
server.listen(1337,"127.0.0.1", function () {
console.log("開始監聽1337");
});
var socket=sio.listen(server);
socket.on("connection", function (socket) {
socket.on("news", function (data) {
console.log(data.hello);
});
socket.emit("news",{hello:"你好"});
});
注意15~17行代碼:是我們新添加的.
事實證明不可以,不會有任何的列印.但是也是不會報錯的.
emit的執行,美其名曰:發送事件.如果有參數,美其名曰:攜帶參數.
後記：
在網上也找到不少關於Express架構中的session調用方法，可是發現真正能用的不是很多，本文是根據自己項目的製作過程，整理的Express和socket.IO中使用session的具體方法。
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