Comments (1)
I'm not quite sure I'm following this but basically, if I get this right:
- You've got an asynchronous
fetchData
on a component that is visited - Then
fetchData
makes a query and you process the response and store it in some request-global / app-global state - You then (in the affected case) perform a redirect, presumably still on the server
- The redirect isn't being made
- Some kind of second query comes into play
So I'm pretty sure for the last two points I'm missing some information to be able to help you. I assume you want to abort traversal at that point? So, that's obviously something that the react-ssr-prepass
visitor doesn't support, so let's assume traversal continues.
After react-ssr-prepass
is done you've marked request to redirect, but are you aborting all other actions, like server-side rendering?
Usually I'd do that (in my case an express server for instance) by checking whether a redirect was scheduled using req.headersSent
. If you're not familiar with that, if you start a redirect then it's clear that your request doesn't need any other content in the response headers than the redirect, so Express goes ahead and sends the redirect down.
So at that point you can back off in your server-side code and say:
if (req.headersSent) return
// ... some React SSR code comes after
Now, I'm not sure what you mean by this last part:
second query doesn't provided to initial state and page looks incorrect
But could it be that you were relying on react-tree-walker
's traversal cancellation, where you could stop it from traversing deeper by returning false
?
There's a little "hack" that you can do, since you're not using suspense. You can take instance
(the one you call instance.fetchData
on) and change the state to tell you to abort early, e.g.:
class YourComponent extends React.Component {
fetchData = async () => {
await yourFetchCall()
if (...) {
res.redirect(...) // I assume this comes from somewhere
this.setState({ abort: true })
}
}
render() {
if (this.state.abort) {
return null; // stop traversal for react-ssr-prepass
}
// ...
}
}
from react-ssr-prepass.
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from react-ssr-prepass.