Question

如何在服务器上运行多个socket事件/ socket.on（）？离。

var express = require('express'),
app = express();
server = require('http').createServer(app);
io = require('socket.io').listen(server)

server.listen(8080);

io.sockets.on('connection', function(socket) {

        socket.on('node1', function(data){
                io.sockets.emit('node1 message', data);
        });
        socket.on('node2', function(data){
                io.sockets.emit('node2 message', data);
        });

});

当我按照以下方式运行客户端时，消息将被广播。

socket.emit('node1','Hello World');

但是在node2上，没有任何东西可以通过。

socket.emit('node2','Hello World');

谢谢！

抱歉，

这是我在客户端运行的（发送数据）。

<!DOCTYPE html>
<html>
<head>
<title>nodes_update</title>
</head>
<body>
<script src="http://192.168.0.1:8080/socket.io/socket.io.js"></script>
<script type="text/JavaScript">

    var socket = io('http://192.168.0.1:8080/');
        socket.emit('<?php echo $_REQUEST["node"] ?>','<?php echo $_REQUEST["node_message"] ?>');
</script>
</body>
</html>

在接收方。

<!DOCTYPE html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">  
</head>
<body>
</body>
<script src="http://192.168.0.1:8080/socket.io/socket.io.js"></script>
<script type="text/JavaScript">

            var socket = io('http://192.168.0.1:8080/');
            socket.on('<?php echo $_REQUEST["node"] ?>', function(data) {

                // plot_data(data);

            });
</script>
</html>



<?php echo $_REQUEST["node"] ?> //is the node number ex "node1" or "node2"
<?php echo $_REQUEST["node_message"] ?> //is the data of the node ex "Temp-90".

http://192.168.0.1/show_node_data.php?node=node1+message&node_message=Temp-90

这是绘制多个节点数据

谢谢！

Answer 1

好的我记录服务器使用mysql进行节点名称查找，然后将数据发送到找到节点名称的页面，否则不发送任何内容。

server.js

var express = require('express'),
app = express();
server = require('http').createServer(app);
io = require('socket.io').listen(server)
server.listen(8080);
var mysql = require('mysql');
var connection = mysql.createConnection('mysql://moo:password@localhost/node_db');
connection.connect();





io.sockets.on('connection', function(socket) {

        socket.on('send message', function(data){
                var token = data.token;
                var message = data.message;

                var queryToken = 'SELECT COUNT(*) as num FROM `node_token` where node_token = ' + connection.escape(token);

                connection.query(queryToken, function(err, rows, fields) {
                        if (err) throw err;
                        //console.log(rows[0].num);
                        //console.log(token);
                        //console.log(message);

                        var node_name = rows[0].num;

                        if(node_name != 0) {
                                console.log("Node name found in DB");
                                io.sockets.emit(token, message);
                        }else{
                        console.log("Node name not found in db");
                        }

                });
        });

});

数据库表;

+----+------------+---------------+
| id | node_token | node_owner_id |
+----+------------+---------------+
|  2 | node1      |             1 |
|  3 | node2      |             1 |
+----+------------+---------------+
2 rows in set (0.00 sec)

发送数据页＆＃34; node_update.php？node = node1＆amp; node_message = temp-90＆＃34;

<!DOCTYPE html>
<html>
<head>
<title>nodes_update</title>
</head>
<body>
<script src="http://192.168.0.1:8080/socket.io/socket.io.js"></script>
<script type="text/JavaScript">

    var token = <?php echo $_REQUEST["node"]; ?>;
    var message = <?php echo $_REQUEST["node_message"]; ?>;

    var socket = io('http://192.168.0.1:8080/');
    socket.emit('send message',{token:token, message:message});
</script>
</body>
</html>

收到数据页＆＃34; node_get_data.php？node = node1＆＃34;

<!DOCTYPE html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">  
</head>
<body>
</body>
<script src="http://192.168.0.1:8080/socket.io/socket.io.js"></script>
<script type="text/JavaScript">

            var socket = io('http://192.168.0.1:8080/');
            socket.on('<?php echo $_REQUEST["node"]; ?>', function(data) {

                //plot(data);

            });
</script>
</html>

这样我可以使用无限制的节点，只需将它们添加到数据库中。

感谢所有帮助!!

运行socket.io连接多个事件

1 个答案: