如何向特定用户发送消息 Ratchet PHP Websocket

Question

我正在尝试构建一个系统，用户可以在与 websocket 服务器建立连接时订阅一个类别，然后他将开始接收该类别的更新。到目前为止，我已经与 Ratchet 合作，我能够向所有连接的客户端发送消息，但问题是我不想向所有客户端发送消息我只想向订阅了的客户端发送消息发送邮件的特定类别。

PHP代码

Chat.php

<?php
namespace MyApp;
use Ratchet\MessageComponentInterface;
use Ratchet\ConnectionInterface;

class Chat implements MessageComponentInterface
{
    protected $clients;

    public function __construct()
    {
        $this->clients = new \SplObjectStorage;
    }

    public function onOpen(ConnectionInterface $conn)
    {
        $this->clients->attach($conn);
    }

    public function onMessage(ConnectionInterface $conn, $msg)
    {
        foreach ($this->clients as $client)
        {
            if($conn !== $client)
                $client->send($msg);
        }
    }

    public function onClose(ConnectionInterface $conn)
    {
        $this->clients->detach($conn);
    }

    public function onError(ConnectionInterface $conn, \Exception $e)
    {
        echo "An error has occurred: {$e->getMessage()}\n";
        $conn->close();
    }
}
?>

server.php

<?php
use Ratchet\Server\IoServer;
use Ratchet\Http\HttpServer;
use Ratchet\WebSocket\WsServer;
use MyApp\Chat;

require dirname(__DIR__) . '/Ratchet/vendor/autoload.php';

$server = IoServer::factory(
  new HttpServer(
    new WsServer(
      new Chat()
    )
  ),
  8080
);

$server->run();
?>

客户端js代码

<script type="text/javascript">
var conn = new WebSocket('ws://localhost:8080');

conn.onopen = function(e) {
  console.log("Connection established!");
};

conn.onmessage = function(e) {
  console.log(e.data);
};
</script>

Answer 1

基本上，您需要一种将数据发送到 WebSocket 的语法，我建议使用 JSON 对象来执行此操作。在您的 WebSocket class 中，您需要一个名为 subscriptions 的局部变量和一个名为 users 的局部变量。

<?php
namespace MyApp;
use Ratchet\MessageComponentInterface;
use Ratchet\ConnectionInterface;

class Chat implements MessageComponentInterface
{
    protected $clients;
    private $subscriptions;
    private $users;

    public function __construct()
    {
        $this->clients = new \SplObjectStorage;
        $this->subscriptions = [];
        $this->users = [];
    }

    public function onOpen(ConnectionInterface $conn)
    {
        $this->clients->attach($conn);
        $this->users[$conn->resourceId] = $conn;
    }

    public function onMessage(ConnectionInterface $conn, $msg)
    {
        $data = json_decode($msg);
        switch ($data->command) {
            case "subscribe":
                $this->subscriptions[$conn->resourceId] = $data->channel;
                break;
            case "message":
                if (isset($this->subscriptions[$conn->resourceId])) {
                    $target = $this->subscriptions[$conn->resourceId];
                    foreach ($this->subscriptions as $id=>$channel) {
                        if ($channel == $target && $id != $conn->resourceId) {
                            $this->users[$id]->send($data->message);
                        }
                    }
                }
        }
    }

    public function onClose(ConnectionInterface $conn)
    {
        $this->clients->detach($conn);
        unset($this->users[$conn->resourceId]);
        unset($this->subscriptions[$conn->resourceId]);
    }

    public function onError(ConnectionInterface $conn, \Exception $e)
    {
        echo "An error has occurred: {$e->getMessage()}\n";
        $conn->close();
    }
}
?>

javascript 看起来有点像这样

<script type="text/javascript">
var conn = new WebSocket('ws://localhost:8080');

conn.onopen = function(e) {
  console.log("Connection established!");
};

conn.onmessage = function(e) {
  console.log(e.data);
};

function subscribe(channel) {
    conn.send(JSON.stringify({command: "subscribe", channel: channel}));
}

function sendMessage(msg) {
    conn.send(JSON.stringify({command: "message", message: msg}));
}
</script>

注意：此代码未经测试，是我根据使用 Ratchet 的经验即时编写的。祝你好运:)

Answer 2

// SOCKET VARIABLE DECLARATION
var mySocket;

// MESSAGE
const socketMessageListener = function(event) {
    var data = JSON.parse(event.data);
};

// OPEN SOCKET
const socketOpenListener = function(event) {
    console.log('Connected');
};

// CLOSE OR DISCONNECT SOCKET
const socketCloseListener = function(event) {
    if (mySocket) {
        console.error('Disconnected.');
    }
    mySocket = new WebSocket('ws://localhost:8080');
    mySocket.addEventListener('open', socketOpenListener);
    mySocket.addEventListener('message', socketMessageListener);
    mySocket.addEventListener('close', socketCloseListener);
};

// CALL THE LISTENER
socketCloseListener();

function sendMessage(data) {
    mySocket.send(JSON.stringify(data));
}

user3049006 我在研究中发现这段代码可以在失败重试连接时保持连接持久。

Answer 3

好的，现在我分享我的经验。您可以发送令牌并在数据库的 onOpen (server.php) 中插入此令牌。您可以在用户登录时插入聊天令牌。每次用户登录时都会生成和更新新令牌。现在使用此令牌在 onOpen 连接中查找用户 ID。

var conn = new WebSocket('ws://172.16.23.26:8080?token=<?php echo !empty($_SESSION['user']['token']) ? $_SESSION['user']['token'] : ''; ?>');    
    conn.onopen = function(e) {
        console.log("Connection established!");
    };

现在Server.php

  public function onOpen(ConnectionInterface $conn) {
    $this->clients->attach($conn);      
    $querystring = $conn->httpRequest->getUri()->getQuery();
    parse_str($querystring,$queryarray);
   //Get UserID By Chat Token
    $objUser = new \users;
    $objUser->setLoginToken($queryarray['token']);
    $GetUserInfo = $objUser->getUserByToken();
    echo "New connection! ({$conn->resourceId})\n";
    //save Chat Connection
   // Insert the new connection with the user ID to Match to later if user ID in Table Then Update IT with a new connection 

 }

现在您的连接已建立，然后向特定用户发送消息

客户端发送 USerID 以及收到的 ID 和消息

$("#conversation").on('click', '#ButtionID', function () {
         var userId      = $("#userId").val();
         var msg         = $("#msg").val();         
         var receiverId  = $("#receiverId").val();
      if ( userId  != null &&  msg  != null ){
        var data = {
            userId: userId,
            msg: msg,
            receiverId: receiverId
        };
        conn.send(JSON.stringify(data));
        $("#msg").val("");  
      }                 
    });

服务器端

public function onMessage(ConnectionInterface $from, $msg) {
      $numRecv = count($this->clients) - 1;
      echo sprintf('Connection %d sending message "%s" to %d other connection%s' . "\n",$from->resourceId, $msg, $numRecv, $numRecv == 1 ? '' : 's');
      $data = json_decode($msg, true);
      echo $data['userId'];
      echo $data['msg'];
      echo $data['receiverId'];
     // Save User ID receiver Id message in table 
     //Now Get Chat Connection by user id By Table Which is saved onOpen function    
        $UptGetChatConnection   = $objChatroom->getChatConnectionUserID($data['receiverId']);
    $ReciId = $UptGetChatConnection[0]['ConnectionID'];
    foreach ($this->clients as $client) {
        if ($from == $client) {
           $data['from']  = "Me";
           $data['fromname'] = 5;
        } else {
           $data['from']  = $user['name'];
           $data['fromname'] = 6;
        }
        echo $client->resourceId;
        echo $ReciId."\n";
        if($client->resourceId == $ReciId || $from == $client){
            $client->send(json_encode($data));
        }
    }
}

现在消息已经通过连接 ID 发送，而不是广播，只发送特定的用户

如何向特定用户发送消息 Ratchet PHP Websocket

How to send messages to particular users Ratchet PHP Websocket

php

real-time

websocket

ratchet