第一次使用节点js,我正在编写一个我和朋友之间供私人使用的应用程序,我的朋友可以随时加入。
是否可能使服务器具有对象数组a.e.带有n个项目的“ franksLibrary”
,并且用户能够阅读和修改“ franksLibrary”?
当前我要做的是在用户网页中设置“ franksLibrary”,并发送franksLibrary和所有其他var来通过socket.io进行同步
index.js是服务器代码, index.html是交付给用户的
例如index.js
var http = require('http').createServer(app);
var io = require('socket.io')(http);
app.get('/', function(req, res){
res.sendFile(__dirname + '/index.html');
});
io.on('connection', function(socket){
socket.on('chat message', function(msg, usr){
io.emit('chat message',msg, usr);
});
});
http.listen(3000, function(){
console.log('listening on *:3000');
});
示例index.html:
var franksLibrary = [{
"book1":"title of book 1"
},
{
"book2":"title of book 2"
}];
socket.on('chat message', function(franksL /*,more variables*/){
franksLibrary = franksL
});
synch = function(){
socket.emit('chat message', franksLibrary /*,more variables*/);
}
removeBook = function(object, from){
var a = object;
var index = from.indexOf(a);
from.splice(index,1);
synch();
}
答案 0 :(得分:1)
将franksLibrary
从index.html
移到index.js
。然后,在服务器上的connection
回调中,将chat message
和数据一起发送到新连接的客户端。
index.js
var franksLibrary = [{
"book1": "title of book 1"
},
{
"book2": "title of book 2"
}];
io.on('connection', function(socket) {
socket.emit('chat message', franksLibrary);
socket.on('chat message', function(data) {
franksLibrary = data;
socket.broadcast.emit('chat message', franksLibrary);
});
});
index.html
// initialize variable
var franksLibrary = [];
const socket = io();
socket.on('chat message', function(franksL) {
franksLibrary = franksL;
});
const synch = function(){
socket.emit('chat message', franksLibrary);
};
const removeBook = function(object, from) {
var a = object;
var index = from.indexOf(a);
from.splice(index,1);
synch();
};