35 lines
1.1 KiB
TypeScript
35 lines
1.1 KiB
TypeScript
import type { BlitzApiRequest, BlitzApiResponse } from "blitz";
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import { getConfig } from "blitz";
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import { getPreviewPostBySlug } from "../../../../integrations/datocms";
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const { serverRuntimeConfig } = getConfig();
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export default async function preview(req: BlitzApiRequest, res: BlitzApiResponse) {
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// Check the secret and next parameters
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// This secret should only be known to this API route and the CMS
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if (
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req.query.secret !== serverRuntimeConfig.datoCms.previewSecret ||
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!req.query.slug ||
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Array.isArray(req.query.slug)
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) {
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return res.status(401).json({ message: "Invalid token" });
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}
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// Fetch the headless CMS to check if the provided `slug` exists
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const post = await getPreviewPostBySlug(req.query.slug);
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// If the slug doesn't exist prevent preview mode from being enabled
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if (!post) {
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return res.status(401).json({ message: "Invalid slug" });
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}
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// Enable Preview Mode by setting the cookies
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res.setPreviewData({});
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// Redirect to the path from the fetched post
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// We don't redirect to req.query.slug as that might lead to open redirect vulnerabilities
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res.writeHead(307, { Location: `/posts/${post.slug}` });
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res.end();
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}
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