如何在 Firebase 中创建带有 503 代码的维护页面？

Question

使用以下 firebase.json，我可以将用户重定向到我想要的 maintenance.html 页面。但是，检索到的页面带有 304 状态代码。我希望使用 503 状态代码检索它，以向搜索引擎表明这是临时维护。我试图手动设置 header 但它似乎不起作用。这在 Firebase 中如何实现？

{
  "hosting": {
    "public": "build",
    "ignore": [],
    "redirects": [ {
      "source": "/index.html",
      "destination": "/maintenance.html",
      "type": 307
    } ],
    "rewrites": [
      {
        "source": "**"
        , "destination": "/index.html"
      }
    ],
    "headers": [
      {
        "source": "/maintenance.html",
        "headers": [ {
          "key": "status",
          "value": "503"
        } ]
      }
    ]
  }
}

Answer 1

以下是最终对我有用的东西：

{
  "hosting": {
    "public": "build",
    "ignore": [],
    "redirects": [
      {
        "source": "/index.html",
        "destination": "/maintenance.html",
        "type": 307
      }
    ],
    "headers": [
      {
        "source": "/maintenance.html",
        "headers": [ {
          "key": "status",
          "value": "503"
        } ]
      }
    ]
  }
}