ClankBundle - WebSocket in Symfony - php

Question

I try to use webscoket in my symfony project. I found this bundle, but i can't setup it.
https://github.com/JDare/ClankBundle
My ChatTopic.php
<?php
namespace My\ChatBundle\Topic;
use JDare\ClankBundle\Topic\TopicInterface;
use Ratchet\ConnectionInterface as Conn;
class ChatTopic implements TopicInterface
{
/**
* This will receive any Subscription requests for this topic.
*
* #param \Ratchet\ConnectionInterface $conn
* #param $topic
* #return void
*/
public function onSubscribe(Conn $conn, $topic)
{
//this will broadcast the message to ALL subscribers of this topic.
$topic->broadcast($conn->resourceId . " has joined " . $topic->getId());
}
/**
* This will receive any UnSubscription requests for this topic.
*
* #param \Ratchet\ConnectionInterface $conn
* #param $topic
* #return void
*/
public function onUnSubscribe(Conn $conn, $topic)
{
//this will broadcast the message to ALL subscribers of this topic.
$topic->broadcast($conn->resourceId . " has left " . $topic->getId());
}
/**
* This will receive any Publish requests for this topic.
*
* #param \Ratchet\ConnectionInterface $conn
* #param $topic
* #param $event
* #param array $exclude
* #param array $eligible
* #return mixed|void
*/
public function onPublish(Conn $conn, $topic, $event, array $exclude, array $eligible)
{
/*
$topic->getId() will contain the FULL requested uri, so you can proceed based on that
e.g.
if ($topic->getId() == "acme/channel/shout")
//shout something to all subs.
*/
$topic->broadcast(array(
"sender" => $conn->resourceId,
"topic" => $topic->getId(),
"event" => $event
));
}
}
Now my services
my_chat.chat_topic_handle:
class: My\ChatBundle\Topic\ChatTopic
config
# Clank Configuration
clank:
web_socket_server:
port: 8080 #The port the socket server will listen on
host: 127.0.0.1 #(optional) The host ip to bind to
topic:
-
name: "chat"
service: "my_chat.chat_topic_handle"
This is my js code:
var myClank = Clank.connect("ws://localhost:8080");
myClank.on("socket/connect", function(session){
session.publish("chat/channel", {msg: "This is a message!"});
//the callback function in "subscribe" is called everytime an event is published in that channel.
session.subscribe("chat/channel", function(uri, payload){
console.log("Received message", payload.msg);
});
session.unsubscribe("chat/channel");
session.publish("chat/channel", {msg: "I won't see this"});
})
myClank.on("socket/disconnect", function(error){
//error provides us with some insight into the disconnection: error.reason and error.code
console.log("Disconnected for " + error.reason + " with code " + error.code);
})
After refreshing page i have nothing from websocket in my console. Webscoket connects with server, but I think that my ChatTopic.php doesn't work, and I don't know why. Thanks for help.

Answer 1

I think the problem is in your js code.
You connect to socket, subscribe to "chat/channel" and immediately unsubscribe. This prevents you from receiving any message.
You should, in order:
subscribe
publish
never unsubscribe (or at least, I still did not find a reason to do so)
By the way, you do not have to "refresh the page", you should open two browser pages on the same url: when the second loads you should see a message in the other one too.