Question

所以我有这个想法，当你运行nodejs脚本时，它启动端口8080上的http（快速）服务器和端口1337上的常规tcp（网络）服务器。当你通过netcat连接到tcp服务器并发送“警告“它通过javascript在网页上运行alert（）命令。这是代码但if语句不起作用（它打印数据但没有在我的Web浏览器上发出警报）

var app = require("express")();
var http = require("http").Server(app);
var io = require("socket.io")(http);
var net = require("net");

app.get("/", function(req, res) {
    res.sendFile(__dirname + "/index.html");
});

var server = net.createServer();

io.on("connection", function(sock) {
    console.log("Client connected");

    server.on("connection", function(conn) {
    var remoteAddress = conn.remoteAddress + ":" + conn.remotePort;
    console.log("New client: " + remoteAddress);

    conn.on("data", function (data) {
        console.log(data.toString())
        if (data.toString() == "alert") {
            console.log("YES ALERT");
            io.emit("HELLO");
        }
    });
    conn.once("close", function () {
        console.log(remoteAddress + " disconnected");
    });
    conn.on("error", function (error) {
        console.log(remoteAddress + " Error: " + error);
    });});
});

server.listen(1337, function() {
    console.log("Listening on 1337");
});

http.listen(8080, function() {
    console.log("Web server started on 8080");
});

Answer 1

在您的网页中包含socket io客户端js并连接到套接字服务器

<script src="/socket.io/socket.io.js"></script>
<script>
  var socket = io('http://localhost:1337');
  socket.on('connect', function(){});
  socket.on('event', function(data){ alert(data.message)  });
  socket.on('disconnect', function(){});
</script>

您可以更改服务器端代码，发出事件以使用上面的示例。

io.emit("event",{"message":"HELLO"});

与net server - NodeJS交互快速服务器

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