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Mercure 即時推播

Doggy 基於 Mercure 協定實作伺服器端即時推播。Mercure Hub 內建於 FrankenPHP,透過 Caddyfile 設定即可啟用,無需額外容器或服務。

架構

客户端 (EventSource)
    ↑ SSE
    └── http://localhost:8000/.well-known/mercure

    Caddyfile (FrankenPHP)
        ↑ mercure 指令内嵌 Hub
    FrankenPHP (内置 Hub)

Caddyfile 設定

FrankenPHP 的 Caddyfile 中嵌入 Mercure Hub:

caddy
http://localhost:8000 {
    route /.well-known/mercure {
        mercure {
            transport bolt {
                path /var/www/var/mercure.db
            }
            publisher_jwt !ChangeThisMercureHubJWTSecretKey!
            subscriber_jwt !ChangeThisMercureHubJWTSecretKey!
            cors_origins http://localhost:8000
            publish_origins *
            anonymous
        }
    }
}

JWT 權杖

MercureTokenFactory 產生帶訂閱權限的 JWT:

php
// src/Security/MercureTokenFactory.php
$token = $factory->createSubscribeToken(
    topics: ['/user/123/*', '/entity/*'],
    roles: ['ROLE_USER'],
    expiresIn: 3600
);

MercureCookieSubscriber 在每個回應中注入 mercureAuthorization Cookie:

php
// 自动生成的订阅主题
$topics = [
    'https://enterprise.local/user/' . $userId . '/export',
    '/user/' . $userId . '/*',
    '/entity/*',
];

前端訂閱

javascript
const url = new URL('/.well-known/mercure', window.location.origin);
url.searchParams.append('topic', '/user/' + userId + '/*');
const eventSource = new EventSource(url);
eventSource.onmessage = (event) => {
    const data = JSON.parse(event.data);
    // 处理推送消息
};

核心應用

  • 匯出進度:大型檔案匯出即時進度推播
  • 線上狀態PresenceService + PresenceApiController
  • 即時通知:系統訊息、審批提醒
  • 資料同步:多使用者協作即時更新

基於 MIT 協議開源 | Copyright © 2026 Doggy