我用swoole搭建一个websocket服务，关于访问IP的一点疑问

安装swoole官方demo代码搭建一个websocket，
服务端代码:ws_server.php

<code>//创建websocket服务器对象，监听0.0.0.0:9502端口
$ws = new swoole_websocket_server("0.0.0.0", 9502);

//监听WebSocket连接打开事件
$ws->on('open', function ($ws, $request) {
    var_dump($request->fd, $request->get, $request->server);
    $ws->push($request->fd, "hello, welcome\n");
});

//监听WebSocket消息事件
$ws->on('message', function ($ws, $frame) {
    echo "Message: {$frame->data}\n";
    $ws->push($frame->fd, "server: {$frame->data}");
});

//监听WebSocket连接关闭事件
$ws->on('close', function ($ws, $fd) {
    echo "client-{$fd} is closed\n";
});

$ws->start();</code>

客户端代码:index.html

<code><script>
var wsServer = 'ws://127.0.0.1:9502';
var websocket = new WebSocket(wsServer);
websocket.onopen = function (evt) {
    console.log("Connected to WebSocket server.");
};

websocket.onclose = function (evt) {
    console.log("Disconnected");
};

websocket.onmessage = function (evt) {
    console.log('Retrieved data from server: ' + evt.data);
};

websocket.onerror = function (evt, e) {
    console.log('Error occured: ' + evt.data);
};
</script></code>

我用命令开启ws_server.php服务端，客户端文件index.html放在apache的web根目录下，我访问localhost,在console控制台能看到“Connected to WebSocket server.”等消息，证明访问成功
但是如果我把ws_server.php的监听ip改成其他（比如192.168.0.233:9502），然后在index.html相关代码改成wsServer = 'ws://192.168.0.233:9502';
访问为什么就不成功了呢？

回复内容：

安装swoole官方demo代码搭建一个websocket，
服务端代码:ws_server.php

<code>//创建websocket服务器对象，监听0.0.0.0:9502端口
$ws = new swoole_websocket_server("0.0.0.0", 9502);

//监听WebSocket连接打开事件
$ws->on('open', function ($ws, $request) {
    var_dump($request->fd, $request->get, $request->server);
    $ws->push($request->fd, "hello, welcome\n");
});

//监听WebSocket消息事件
$ws->on('message', function ($ws, $frame) {
    echo "Message: {$frame->data}\n";
    $ws->push($frame->fd, "server: {$frame->data}");
});

//监听WebSocket连接关闭事件
$ws->on('close', function ($ws, $fd) {
    echo "client-{$fd} is closed\n";
});

$ws->start();</code>

客户端代码:index.html

<code><script>
var wsServer = 'ws://127.0.0.1:9502';
var websocket = new WebSocket(wsServer);
websocket.onopen = function (evt) {
    console.log("Connected to WebSocket server.");
};

websocket.onclose = function (evt) {
    console.log("Disconnected");
};

websocket.onmessage = function (evt) {
    console.log('Retrieved data from server: ' + evt.data);
};

websocket.onerror = function (evt, e) {
    console.log('Error occured: ' + evt.data);
};
</script></code>

我用命令开启ws_server.php服务端，客户端文件index.html放在apache的web根目录下，我访问localhost,在console控制台能看到“Connected to WebSocket server.”等消息，证明访问成功
但是如果我把ws_server.php的监听ip改成其他（比如192.168.0.233:9502），然后在index.html相关代码改成wsServer = 'ws://192.168.0.233:9502';
访问为什么就不成功了呢？

设置成0.0.0.0代表监听所有地址来源的连接，所以可以进行连接。
而设置成192.168.0.233表示接受来自192.168.0.233这个主机的连接，你的本地主机不是192.168.0.233，连接自然不能建立。