我正在尝试制作通知系统。为了证明这一点,用户1向用户2发送了好友请求。我正在使用express.js,angularjs和socket.io。单击按钮后,User1发送请求。在User2的末尾,有一个套接字on(),正在侦听好友请求事件。但是当我广播时,其他用户无法接收任何消息。
app.js(节点服务器文件)
var express = require('express'),
app = express();
var port = process.env.PORT || 3000;
var io = require('socket.io').listen(app.listen(port));
require('./config')(app,io);
require('./routes')(app,io);
config.js
// This file handles the configuration of the app.
// It is required by app.js
var express = require('express');
module.exports = function(app, io){
// Set .html as the default template extension
app.set('view engine', 'html');
// Initialize the ejs template engine
app.engine('html', require('ejs').renderFile);
// Tell express where it can find the templates
app.set('views', __dirname + '/views');
// Make the files in the public folder available to the world
app.use(express.static(__dirname + '/public'));
};
routes.js(从此文件发送好友请求)
var gravatar = require('gravatar');
var mysql = require('mysql');
// This is needed if the app is run on heroku:
var connection = mysql.createConnection({
host : "localhost",
user : "root",
password : "",
database : "two_way_demo"
});
connection.connect(function(error){
if(error)
{
console.log("Problem with MySQL"+error);
}
else {
console.log("Connected with Database");
}
});
module.exports = function(app,io){
app.get('/',function(req,res){
res.render('index');
});
app.get('/create', function(req,res){
// Generate unique id for the room
var id = Math.round((Math.random() * 1000000));
// Redirect to the random room
res.redirect('/chat/'+id);
});
app.get('/home/:id', function(req,res){
// Render the chant.html view
res.render('home');
});
// Initialize a new socket.io application, named 'chat'
var chat = io.on('connection', function (socket) {
socket.on('get-user-id',function(data){
connection.query("SELECT * from user_info WHERE email='"+data.userEmail+"'",function(err,rows){
if(err)
{
console.log("Problem with MySQL"+err);
}
else
{
//console.log(rows);
JSON.stringify(rows);
socket.emit('user-id',rows);
}
});
});
socket.on('send-request',function(data){
console.log(data);
*********************************************************************
// Tried the emit here but its not working
//io.emit('friend request', {
// receiverid: data.receiverid
//});
*********************************************************************
});
});
}
angular-code.js(角度代码文件)
$(function () {
var app = angular.module("notificationApp", []);
app.controller("chatCTRL", ["$scope", "$http", "$interval", function ($scope, $http, $interval) {
// connect to the socket
//var socket = io();
//socket.on('connect', function () {
// io.on('friend request', function (data) {
// alert("here")
// });
//});
$scope.senderId = Number(window.location.pathname.match(/(\d+)$/)[1]);
$scope.sendrequest = function (senderid, receiverid) {
var socket = io();
socket.on('connect', function () {
socket.emit('send-request', {
senderid: senderid,
receiverid : receiverid
});
});
}
}]);
app.controller("loginCTRL", ["$scope", "$http", "$interval", "$window", function ($scope, $http, $interval, $window) {
$scope.sendLogin = function () {
var socket = io();
socket.on('connect', function () {
socket.emit('get-user-id', {
userEmail: $scope.hisEmail
});
});
socket.on('connect', function () {
socket.on('user-id', function (data) {
$scope.UserId = data[0].user_id;
$window.location = "http://localhost:3000/home/" + $scope.UserId;
});
});
}
}]);
}());
home.html
<!DOCTYPE html>
<html ng-app="notificationApp">
<head lang="en">
<meta charset="UTF-8">
<title></title>
</head>
<body ng-controller="chatCTRL">
<h1>welcome</h1>
<div id="createbutton">
<div id="little"><button ng-click="sendrequest(senderId,6)">Send Friend Request to User#6</button></div>
</div>
<script src="http://cdnjs.cloudflare.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script src="/socket.io/socket.io.js"></script>
<script src="../angular/angular.js"></script>
<script src="../angular/common_angular.js"></script>
</body>
</html>
最佳答案
一些客户端架构的事情:
在大多数情况下,在有角度的客户端上,最好将套接字连接移到服务中。并在服务初始化时建立连接(服务为单例,因此启动时将只有一个连接),然后将此服务注入控制器中。
使用以下方法创建一些父抽象控制器可能会很方便
所有套接字侦听器,因此,无论角度控制器是否处于活动状态,所有侦听器都在监视。当父控制器从套接字获取数据时,它可以将其广播到子控制器
在您的注释代码中,您具有:
//var socket = io();
//socket.on('connect', function () {
// io.on('friend request', function (data) {
// alert("here")
// });
//});
更改为此(如果您在使用中建立连接,则应省略连接部分):
var socket = io();
socket.on('connect', function () {
socket.on('friend request', function (data) {
alert("here")
});
});
后端:
在您的注释代码中,您具有:
//io.emit('friend request', {
// receiverid: data.receiverid
//});
您应该使用
socket
中的var chat = io.on('connection', function (socket) {...
而不是io.emit
进行发射创建数组变量,在其中将在连接部分之前存储所有具有用户ID的套接字:
var socketList = [];
var chat = io.on('connection', function (socket) {
socketList.push({id:someId,socket:socket})
...
}
现在,在
send-request
中,用户应该发送其朋友的ID(我们必须知道应该通知哪个用户,我们当然可以通知所有人):socket.on('send-request',function(data){
socketList.forEach(function(soc){
if(soc.id === someId){
soc.socket.emit('friend request', {
receiverid: data.receiverid
})
}
});
我也不喜欢这部分
receiverid: data.receiverid
,因为这意味着标记用户从接收者客户端获取接收者的ID。这可能是不安全的(用户可以更改其ID并发送其他ID)。我更喜欢在服务器端创建ID,并且当用户A向用户B发送通知时,我会从服务器变量获取用户A ID。一段时间以来,我创建了聊天应用程序的简单原型(角度和快速),在此我提到了一些东西。如果您的应用程序仍然有问题,请去那里检查我的代码:
https://github.com/uhlryk/chat-prototype