RoadRunner Centrifugo Bridge

This repository contains the codebase PHP bridge using RoadRunner centrifuge plugin.

Installation

To install application server and Jobs codebase

composer require roadrunner-php/centrifugo

You can use the convenient installer to download the latest available compatible version of RoadRunner assembly:

composer require spiral/roadrunner-cli --dev
vendor/bin/rr get

Proxy Centrifugo requests to a PHP application

It's possible to proxy some client connection events from Centrifugo to the RoadRunner application server and react to them in a custom way. For example, it's possible to authenticate connection via request from Centrifugo to application backend, refresh client sessions and answer to RPC calls sent by a client over bidirectional connection.

The list of events that can be proxied:

connect – called when a client connects to Centrifugo, so it's possible to authenticate user, return custom data to a client, subscribe connection to several channels, attach meta information to the connection, and so on. Works for bidirectional and unidirectional transports.
refresh - called when a client session is going to expire, so it's possible to prolong it or just let it expire. Can also be used just as a periodical connection liveness callback from Centrifugo to app backend. Works for bidirectional and unidirectional transports.
sub_refresh - called when it's time to refresh the subscription. Centrifugo itself will ask your backend about subscription validity instead of subscription refresh workflow on the client-side.
subscribe - called when clients try to subscribe on a channel, so it's possible to check permissions and return custom initial subscription data. Works for bidirectional transports only.
publish - called when a client tries to publish into a channel, so it's possible to check permissions and optionally modify publication data. Works for bidirectional transports only.
rpc - called when a client sends RPC, you can do whatever logic you need based on a client-provided RPC method and params. Works for bidirectional transports only.

First you need to add centrifuge section to your RoadRunner configuration. For example, such a configuration would be quite feasible to run:

rpc:
  listen: tcp://127.0.0.1:6001

server:
  command: "php app.php"
  relay: pipes

centrifuge:
  proxy_address: "tcp://0.0.0.0:10001" # Centrifugo address

and centrifugo config:

{
  "admin": true,
  "api_key": "secret",
  "admin_password": "password",
  "admin_secret": "admin_secret",
  "allowed_origins": [
    "*"
  ],
  "token_hmac_secret_key": "test",
  "publish": true,
  "proxy_publish": true,
  "proxy_subscribe": true,
  "proxy_connect": true,
  "allow_subscribe_for_client": true,
  "proxy_connect_endpoint": "grpc://127.0.0.1:10001",
  "proxy_connect_timeout": "10s",
  "proxy_publish_endpoint": "grpc://127.0.0.1:10001",
  "proxy_publish_timeout": "10s",
  "proxy_subscribe_endpoint": "grpc://127.0.0.1:10001",
  "proxy_subscribe_timeout": "10s",
  "proxy_refresh_endpoint": "grpc://127.0.0.1:10001",
  "proxy_refresh_timeout": "10s",
  "proxy_sub_refresh_endpoint": "grpc://127.0.0.1:10001",
  "proxy_sub_refresh_timeout": "1s",
  "proxy_rpc_endpoint": "grpc://127.0.0.1:10001",
  "proxy_rpc_timeout": "10s"
}

Note proxy_connect_endpoint, proxy_publish_endpoint, proxy_subscribe_endpoint, proxy_refresh_endpoint, proxy_sub_refresh_endpoint, proxy_rpc_endpoint - endpoint address of roadrunner server with activated centrifuge plugin.

To init abstract RoadRunner worker:

<?php

require __DIR__ . '/vendor/autoload.php';

use RoadRunner\Centrifugo\CentrifugoWorker;
use RoadRunner\Centrifugo\Payload;
use RoadRunner\Centrifugo\Request;
use RoadRunner\Centrifugo\Request\RequestFactory;
use Spiral\RoadRunner\Worker;

$worker = Worker::create();
$requestFactory = new RequestFactory($worker);

// Create a new Centrifugo Worker from global environment
$centrifugoWorker = new CentrifugoWorker($worker, $requestFactory);

while ($request = $centrifugoWorker->waitRequest()) {

    if ($request instanceof Request\Invalid) {
        $errorMessage = $request->getException()->getMessage();

        if ($request->getException() instanceof \RoadRunner\Centrifugo\Exception\InvalidRequestTypeException) {
            $payload = $request->getException()->payload;
        }

        // Handle invalid request
        // $logger->error($errorMessage, $payload ?? []);

        continue;
    }

    if ($request instanceof Request\Refresh) {
        try {
            // Do something
            $request->respond(new Payload\RefreshResponse(
                // ...
            ));
        } catch (\Throwable $e) {
            $request->error($e->getCode(), $e->getMessage());
        }

        continue;
    }

    if ($request instanceof Request\Subscribe) {
        try {
            // Do something
            $request->respond(new Payload\SubscribeResponse(
                // ...
            ));

            // You can also disconnect connection
            $request->disconnect('500', 'Connection is not allowed.');
        } catch (\Throwable $e) {
            $request->error($e->getCode(), $e->getMessage());
        }

        continue;
    }

    if ($request instanceof Request\Publish) {
        try {
            // Do something
            $request->respond(new Payload\PublishResponse(
                // ...
            ));

            // You can also disconnect connection
            $request->disconnect('500', 'Connection is not allowed.');
        } catch (\Throwable $e) {
            $request->error($e->getCode(), $e->getMessage());
        }

        continue;
    }

    if ($request instanceof Request\RPC) {
        try {
            $response = $router->handle(
                new Request(uri: $request->method, data: $request->data),
            ); // ['user' => ['id' => 1, 'username' => 'john_smith']]

            $request->respond(new Payload\RPCResponse(
                data: $response
            ));
        } catch (\Throwable $e) {
            $request->error($e->getCode(), $e->getMessage());
        }

        continue;
    }
}

Note You can find addition information about here.

License

The MIT License (MIT). Please see LICENSE for more information. Maintained by Spiral Scout.