好的，所以我能够以一种半黑客的方式实现这个。我修改了firebase.json文件，将'/post'路由重定向到一个firebase云函数。你只需要添加你想要重定向的“源”路由，并添加你想要触发的firebase云函数的名称。
"rewrites": [
{
"source": "/post",
"function": "prebuildPostPage"
},
{
"source": "**",
"destination": "/index.html"
}
]
我需要添加“express”包来处理https请求。在你的函数文件夹中运行“npm i express”。然后我创建了这两个函数（看起来有点奇怪）：
const express = require('express');
const app = express();
app.get('/post', (req, res) => {
console.log(req.query);
const uid = req.query.uid;
const pid = req.query.pid;
console.log(`uid[${uid}], pid[${pid}]`);
if (uid == null || pid == null)
res.status(404).send("Post doesn't exist");
res.send(`<!DOCTYPE html>
<html>
<head>
<meta property="og:image" id='urlThumb' content="${`https://my.app/posts%2F${uid}%2F${pid}%2Furl_thumb.jpg?alt=media`}"/>
<meta property="og:image:width" content="800">
<meta property="og:image:height" content="600">
//Rest is the same as index.js head.
</head>
<body id="app-container">
//Same as index.js body
</body>
</html>
`);
});
exports.prebuildPostPage = functions.https.onRequest(app);
这对于向网络爬虫提供正确的缩略图非常有效，但不幸的是，它会将人们发送到主页。不好。
这是因为Flutter Web使用“＃”来管理页面路由和历史记录。在转发到我的云函数的URL中，忽略了哈希标记后的所有内容。
所以...这是一个hack方法...在我的flutter web应用程序main.dart文件中，我必须检查给定的URL是否实际上是“my.app/post?uid=xxx&pid=xxx”格式。如果是这种情况，我创建了第二个选项MyAppPost，而不是加载默认的MyApp（从主页开始），该选项默认为带有提供的uid和pid数据的帖子屏幕。这起作用了，但它破坏了我的导航系统。
将继续尝试改进此设置。
void main() {
setupLocator();
String url = window.location.href;
String _uid;
String _pid;
bool isPost = false;
print(url);
if (url.contains('/post')) {
_uid = getParam(url, 'uid', 28);
_pid = getParam(url, 'pid', 20);
if (_uid != null && _pid != null) isPost = true;
}
runApp(
MultiProvider(
providers: [
ChangeNotifierProvider(
create: (_) => PageManager(),
),
],
child: isPost
? MyAppPost(
uid: _uid,
pid: _pid,
)
: MyApp(),
),
);
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'VESTIQ',
navigatorKey: locator<NavigationService>().navigatorKey,
onGenerateRoute: (rs) => generateRoute(rs, context),
initialRoute: HomeRoute,
);
}
}
class MyAppPost extends StatelessWidget {
final String uid;
final String pid;
const MyAppPost({Key key, this.uid, this.pid}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'VESTIQ',
navigatorKey: locator<NavigationService>().navigatorKey,
home: PostView(
oid: uid,
pid: pid,
),
);
}
}
编辑：正在工作的导航器
void main() {
setupLocator();
String url = window.location.href;
String _uid;
String _pid;
bool launchWebApp = false;
if (url.contains('/post')) {
_uid = getParam(url, 'uid', 28);
_pid = getParam(url, 'pid', 20);
}
if (url.contains('/app')) launchWebApp = true;
runApp(
MyApp(
uid: _uid,
pid: _pid,
launchWebApp: launchWebApp,
),
);
}
class MyApp extends StatelessWidget {
final String uid;
final String pid;
final bool launchWebApp;
const MyApp({Key key, this.uid, this.pid, this.launchWebApp})
: super(key: key);
@override
Widget build(BuildContext context) {
bool isPostLink = (uid != null && pid != null);
if (isPostLink) {
urlPost = PostCard.fromPost(Post()
..updatePost(
uid: uid,
pid: pid,
));
}
Provider.of<Post>(context, listen: false).updatePost(uid: uid, pid: pid);
return MaterialApp(
title: 'VESTIQ',
navigatorKey: locator<NavigationService>().navigatorKey,
onGenerateRoute: (rs) => generateRoute(rs, context),
initialRoute: launchWebApp
? AppRoute
: isPostLink
? PostRoute
: HomeRoute,
);
}
}
