GammaPushpinBundle
, (*1)
Symfony Bundle that helps you to add a realtime features to your applications using Pushpin reverse proxy. Integrates php-gripcontrol library., (*2)
Features
- Works with WebSocket-over-HTTP Requests from Pushpin
- De serializes (using jms/serializer) a TEXT events from Pushpin into DTOs (events) specified by your configuration
- Handling WebSocketEvent with your specific handler
- Pushpin helpers to publishing to a channel, subscribing, detaching etc.
Installation
Install a bundle, (*3)
composer require "gamma/pushpin-bundle"
Register the bundle in app/AppKernel.php:, (*4)
``` php
public function registerBundles()
{
return array(
// ...
new Gamma\Pushpin\PushpinBundle\GammaPushpinBundle()
);
}, (*5)
Configuration
------------
```yaml
// config.yml
gamma_pushpin:
proxy:
control_uri: "http://localhost:5561/" # control URI to Pushpin
web_socket:
json_events:
base_namespace: ~
For testing you need to install a Pushpin on dev machine.
And enable WebSocket-over-HTTP in routes config file:, (*6)
* localhost:80,over_http, (*7)
Usage
Create an event class. Extend AbstractJsonEvent. This class will hold a data from websocket clients:, (*8)
<?php
namespace AppBundle\WebsocketEvents\Chat;
use Gamma\Pushpin\PushpinBundle\Events\Base\AbstractJsonEvent;
use JMS\Serializer\Annotation\Type as JMS;
class ChatMessage extends AbstractJsonEvent
{
/**
* @var string
* @JMS("string")
*/
public $room;
/**
* @var string
* @JMS("string")
*/
public $comment;
}
Update configuration with your new event:, (*9)
// config.yml
gamma_pushpin:
// ...
web_socket:
json_events:
base_namespace: 'AppBundle\WebsocketEvents'
mappings:
chatMessage: # logical name of your event
class: 'Chat\ChatMessage' # base_namespace + clas should give fully qualified class name
Create handler service for your event by extending AbstractEventHandler class:, (*10)
<?php
namespace AppBundle\Services\WebSocket;
use Gamma\Pushpin\PushpinBundle\Events\Base\AbstractEvent;
use Gamma\Pushpin\PushpinBundle\Handlers\Base\AbstractEventHandler;
use Gamma\Pushpin\PushpinBundle\Interfaces\Events\TextEventInterface;
use GripControl\WebSocketEvent;
class ChatMessageHandler extends AbstractEventHandler
{
const EVENT_TYPE = TextEventInterface::EVENT_TYPE;
/**
* {@inheritdoc}
*/
public function handle(AbstractEvent $event)
{
//your logic
//Example of creating response event to client:
//$resultEvent = new WebSocketEvent('TEXT', 'Hello Client');
}
}
````
Here you can return a single WebSocketEvent, array of WebSocketEvent objects or WebSocketEventsDTO that holds events as array as well.
Register handler as a Symfony service:
```YAML
//services.yml
services:
app.chat_message_handler:
class: AppBundle\Services\Websocket\ChatMessageHandler
tags:
- { name: gamma.pushpin.grip_event_handler, type: chatMessage }
Note: Here is type: <logicalEventName> should be similar to logical name of event in configuration., (*11)
In a Controller this Events should be passed to GripControl::encode_websocket_events function.
So last thing you need to do is to create a simple controller that Pushpin will access., (*12)
<?php
namespace AppBundle\Controller;
use Gamma\Pushpin\PushpinBundle\Controller\GripController;
use Gamma\Pushpin\PushpinBundle\DTO\WebSocketEventsDTO;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\ParamConverter;
class ChatController extends GripController
{
/**
* @Route("/websocket/chat", name="app_websocket_chat_message")
* @param Request $request
* @param WebSocketEventsDTO $inputEvents
*
* @ParamConverter("inputEvents", converter="gamma.web_socket.events", options={"format": "json"})
* @return Response
*/
public function chatMessageAction(Request $request, WebSocketEventsDTO $inputEvents)
{
return $this->encodeWebSocketEvents(
$this->get('gamma.pushpin.grip.events_handler')->handleEvents($inputEvents)
);
}
}
If everything is ok you should be able to connect to Pushpin's websocket port (7999 by default) with URL:
ws://localhost:7999/websocket/chat, (*13)
You can test with wscat utility:, (*14)
$ wscat -c ws://localhost:7999/websocket/chat
connected (press CTRL+C to quit)
Now clients can send a message to your application:, (*15)
chatMessage:{"room":"test","comment":"hello Symfony!"}
This will call your handler and return a result back to a client., (*16)
Working with channels
Pushpin works as a publish-subscribe service. So you have ability to subscribe clients to a specific channels and publish a messages to it.
Anything that can be a channel in your application should implement a WebSocketChannelInterface with one method getChannelName().
To publish messages you can also use \PubControl\PubControl::publish, (*17)
By calling methods on gamma.pushpin.pushpin_helper you can:
- subscribe client to a channel subscribeToChannel($channel)
- publish to a channel sendWsMessageToChannel($channel, $message)
- unsubscribe from channel unSubscribeFromChannel($channel)
- detach connection detachConnection(), (*18)
Here is additional info on Pushpin, (*19)
Example of working application
SimpleChatDemo, (*20)
TODO
- HTTP streaming with Pushpin
- more documentation
- more
phpunit
Wallogit.com
