Ratchet: Sending Message to a Specific Client Without Looping Through Array

[areebmajeed]

I'd to send a message to a specific client in Ratchet. Currently, I use:

foreach ($this->clients as $client) { if ($tosendid == $client->resourceId) { $client->send($msg); } }

I wonder if there's a direct way to send a message to the client without looping through the whole array. I don't mind, but I wonder if this method is slow because when you've 10,000 concurrent users, it might be slow to loop through an array just to send message to one user.

[cboden]

Instead of using an SplObjectStorage to store your clients you can use an array:

class MyClass implements \Ratchet\MessageComponentInterface {
    private $clients = [];

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

    public function msgToUser($msg, $id) {
        $this->clients[$id]->send($msg);
    }
}

[areebmajeed]

Thank you in tons!!!

[binodpal]

Sir msgToUser is a new function in ratchet?

[cboden]

No @binodpal, it's part of the example code I posted.

[samiklah]

how can I pass $id,

`var websocket_server = new WebSocket("ws://localhost:8080/");
websocket_server.onopen = function(e) {
console.log("Connection established!");
};
websocket_server.onerror = function(e) {
// Errorhandling
}
websocket_server.onmessage = function(e)
{
var json = JSON.parse(e.data);
switch(json.type) {
case 'chat':
$('#msg-area').append(json.msg);
break;
}
}

$(document).on('click', '#submit', function(){
var chat_msg = $('#msginput').val();
var to_id = $('#selected_user').val();

websocket_server.send(
JSON.stringify({
'type':'chat',
'user_id':,
'to_id':to_id,
'chat_msg':chat_msg
})
);
$('#msginput').val('');

});`

[areebmajeed]

@samiklah You must create a unique identifier for each user at the server side and then import it at the client-side as it will enable you to identify every user across the $clients array.

For instance, you can populate an array at your WebSocket Server which maps the unique ID of the user to their resource ID.

[Kamran2452]

Can i get custom User id at onOpen event and store it in an array for comparison.
If so then How?

[areebmajeed]

Can i get custom User id at onOpen event and store it in an array for comparison.
If so then How?

You can use the resource Id to identify a user.

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

[Kamran2452]

I got this from earlier comment let's say i have a notification that i want to send to a specific group of people one thing in my mind was to set the resource id or some other variable with my user id at onOpen event and onmessage i will send the user id's that i want to send message to with $data and then loop through the available users to achieve it but i can't get my head around how to set the custom user id
More Over for every tab open in same browser the server assigns a different Resource ID.

[areebmajeed]

I got this from earlier comment let's say i have a notification that i want to send to a specific group of people one thing in my mind was to set the resource id or some other variable with my user id at onOpen event and onmessage i will send the user id's that i want to send message to with $data and then loop through the available users to achieve it but i can't get my head around how to set the custom user id
More Over for every tab open in same browser the server assigns a different Resource ID.

Please read my answer to this question at https://stackoverflow.com/questions/55094719/how-do-you-send-data-to-the-server-onload-using-ratchet-websockets/55095014#55095014

[Kamran2452]

I read your solution and i think it might work in my scenario too can you share me the sample code for this cause i am new to this and don't know much about it.