有一个symfony应用程序,它使用带棘轮的php websockets (http://socketo.me/docs/sessions)。创建一个可以将接收到的消息广播到所有连接的客户端(web浏览器)的websocket应用程序似乎很常见。但是我有一个很大的问题,那就是只向特定的客户端发送消息(例如,用getUser()加载用户并找到它所属的websocket客户端对象)。
这是我的设置:
// WebsocketServer.php
$server = IoServer::factory(
new HttpServer(
new SessionProvider(
new WsServer(
new WebSocketCommunicator()
),
new MySessionHandler())
),
$this->_websocketPort
);
$server->run();
// Handler for communication with clients
class WebSocketCommunicator implements HttpServerInterface
{
protected $clients;
public function __construct()
{
$this->clients = new \SplObjectStorage();
}
public function onOpen(ConnectionInterface $conn, RequestInterface $request = null)
{
echo "URI: " . $conn->httpRequest->getUri()->getHost();
echo "KEY: " . $conn->Session->get('key');
// ==> I need somethink like:
$user = $conn->Session->get('user_from_session')->getId();
// Attach new client
$this->clients->attach($conn);
}
public function onMessage(ConnectionInterface $pClient, $msg)
{
$msgObj = json_decode($msg);
echo "WebSocket-Request msg: " . $msg->msg;
}
}
在使用websockets时,没有可以加载登录用户实体(->getUser())的常规会话或安全对象。如上面的链接所述,可以使用包含头和Symfony2数据的cookie会话对象或httpRequest对象。有没有办法在这些实例中检索用户对象,甚至是用户id?
我能找到的只有下面这样的例子和变通方法:
Send user ID from browser to websocket server while opening connection
How do you send data to the server onload using ratchet websockets?
https://medium.com/@nihon_rafy/create-a-websocket-server-with-symfony-and-ratchet-973a59e2df94
现在有没有现代的解决方案呢?或者任何我可以读到的教程或参考资料?
发布于 2021-06-03 13:06:11
我正在为websocket服务器开发一个Laravel 8.0应用程序,PHP 7.4和cboden/Ratchet包。当事件在后端被触发时,我需要向用户/用户组发送通知,或者更新UI。
我所做的是:
1)使用composer安装了amphp/websocket-client包。
2)创建了一个单独的类,以便实例化一个可以连接到websocket服务器的对象,发送所需的消息并断开连接:
namespace App;
use Amp\Websocket\Client;
class wsClient {
public function __construct() {
//
}
// Creates a temporary connection to the WebSocket Server
// The parameter $to is the user name the server should reply to.
public function connect($msg) {
global $x;
$x = $msg;
\Amp\Loop::run(
function() {
global $x;
$connection = yield Client\connect('ws://ssa:8090');
yield $connection->send(json_encode($x));
yield $connection->close();
\Amp\Loop::stop();
}
);
}
}
3)在处理程序类中 onMessage()事件,如下所示:
/**
* @method onMessage
* @param ConnectionInterface $conn
* @param string $msg
*/
public function onMessage(ConnectionInterface $from, $msg) {
$data = json_decode($msg);
// The following line is for debugging purposes only
echo " Incoming message: " . $msg . PHP_EOL;
if (isset($data->username)) {
// Register the name of the just connected user.
if ($data->username != '') {
$this->names[$from->resourceId] = $data->username;
}
}
else {
if (isset($data->to)) {
// The "to" field contains the name of the users the message should be sent to.
if (str_contains($data->to, ',')) {
// It is a comma separated list of names.
$arrayUsers = explode(",", $data->to);
foreach($arrayUsers as $name) {
$key = array_search($name, $this->names);
if ($key !== false) {
$this->clients[$key]->send($data->message);
}
}
}
else {
// Find a single user name in the $names array to get the key.
$key = array_search($data->to, $this->names);
if ($key !== false) {
$this->clients[$key]->send($data->message);
}
else {
echo " User: " . $data->to . " not found";
}
}
}
}
echo " Connected users:\n";
foreach($this->names as $key => $data) {
echo " " . $key . '->' . $data . PHP_EOL;
}
}
如您所见,您希望websocket服务器将消息发送到的用户在$msg参数中指定为字符串($data-> to )以及消息本身($data-> message )。这两件事都是JSON编码的,这样参数$msg就可以被视为对象。
4)客户端的(布局刀片文件中的javascript)当客户端连接时,我将用户名发送到websocket服务器(正如您的第一个链接所建议的那样)
var currentUser = "{{ Auth::user()->name }}";
socket = new WebSocket("ws://ssa:8090");
socket.onopen = function(e) {
console.log(currentUser + " has connected to websocket server");
socket.send(JSON.stringify({ username: currentUser }));
};
socket.onmessage = function(event) {
console.log('Data received from server: ' + event.data);
};
因此,用户名及其连接号被保存在websocket服务器中。
5)处理程序类中的onOpen()方法如下所示:
public function onOpen(ConnectionInterface $conn) {
// Store the new connection to send messages to later
$this->clients[$conn->resourceId] = $conn;
echo " \n";
echo " New connection ({$conn->resourceId}) " . date('Y/m/d h:i:sa') . "\n";
}
每次客户端连接到websocket服务器时,它的连接号或resourceId都存储在一个数组中。因此,用户名存储在一个数组($names)中,密钥存储在另一个数组($clients)中。
6)最后,我可以在项目中的任何地方创建project客户端的实例:
public function handle(NotificationSent $event) {
$clientSocket = new wsClient();
$clientSocket->connect(array('to'=>'Anatoly,Joachim,Caralampio', 'message'=>$event->notification->data));
}
在本例中,我使用通知事件侦听器的handle()方法。
好吧,这篇文章是为那些想知道如何从PHP websocket服务器(AKA echo server)向一个特定的客户端或一组客户端发送消息的人准备的。
https://stackoverflow.com/questions/64292868
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