hyperf/docs/zh-hk/websocket-server.md

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# WebSocket 服務
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Hyperf 提供了對 WebSocket Server 的封裝,可基於 [hyperf/websocket-server](https://github.com/hyperf/websocket-server) 組件快速搭建一個 WebSocket 應用。
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## 安裝
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```bash
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composer require hyperf/websocket-server
```
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## 配置 Server
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修改 `config/autoload/server.php`,增加以下配置。
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```php
<?php
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'servers' => [
[
'name' => 'ws',
'type' => Server::SERVER_WEBSOCKET,
'host' => '0.0.0.0',
'port' => 9502,
'sock_type' => SWOOLE_SOCK_TCP,
'callbacks' => [
SwooleEvent::ON_HAND_SHAKE => [Hyperf\WebSocketServer\Server::class, 'onHandShake'],
SwooleEvent::ON_MESSAGE => [Hyperf\WebSocketServer\Server::class, 'onMessage'],
SwooleEvent::ON_CLOSE => [Hyperf\WebSocketServer\Server::class, 'onClose'],
],
],
],
```
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## 配置路由
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> 目前暫時只支持配置文件的模式配置路由,後續會提供註解模式。
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`config/routes.php` 文件內增加對應 `ws` 的 Server 的路由配置,這裏的 `ws` 值取決於您在 `config/autoload/server.php` 內配置的 WebSocket Server 的 `name` 值。
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```php
<?php
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Router::addServer('ws', function () {
Router::get('/', 'App\Controller\WebSocketController');
});
```
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## 創建對應控制器
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```php
<?php
declare(strict_types=1);
namespace App\Controller;
use Hyperf\Contract\OnCloseInterface;
use Hyperf\Contract\OnMessageInterface;
use Hyperf\Contract\OnOpenInterface;
use Swoole\Http\Request;
use Swoole\Server;
use Swoole\Websocket\Frame;
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use Swoole\WebSocket\Server as WebSocketServer;
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class WebSocketController implements OnMessageInterface, OnOpenInterface, OnCloseInterface
{
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public function onMessage(WebSocketServer $server, Frame $frame): void
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{
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$server->push($frame->fd, 'Recv: ' . $frame->data);
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}
public function onClose(Server $server, int $fd, int $reactorId): void
{
var_dump('closed');
}
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public function onOpen(WebSocketServer $server, Request $request): void
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{
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$server->push($request->fd, 'Opened');
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}
}
```
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接下來啟動 Server便能看到對應啟動了一個 WebSocket Server 並監聽於 9502 端口,此時您便可以通過各種 WebSocket Client 來進行連接和進行數據傳輸了。
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```
$ php bin/hyperf.php start
[INFO] Worker#0 started.
[INFO] WebSocket Server listening at 0.0.0.0:9502
[INFO] HTTP Server listening at 0.0.0.0:9501
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```
## 連接上下文
WebSocket 服務的 onOpen, onMessage, onClose 回調並不在同一個協程下觸發因此不能直接使用協程上下文存儲狀態信息。WebSocket Server 組件提供了 **連接級** 的上下文API 與協程上下文完全一樣。
```php
<?php
declare(strict_types=1);
namespace App\Controller;
use Hyperf\Contract\OnMessageInterface;
use Hyperf\Contract\OnOpenInterface;
use Hyperf\WebSocketServer\Context;
use Swoole\Http\Request;
use Swoole\Websocket\Frame;
use Swoole\WebSocket\Server as WebSocketServer;
class WebSocketController implements OnMessageInterface, OnOpenInterface
{
public function onMessage(WebSocketServer $server, Frame $frame): void
{
$server->push($frame->fd, 'Username: ' . Context::get('username'));
}
public function onOpen(WebSocketServer $server, Request $request): void
{
Context::set('username', $request->cookie['username']);
}
}
```