29 lines
948 B
JavaScript
29 lines
948 B
JavaScript
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import { getPreviewPostBySlug } from '../../lib/graphcms'
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export default async function handler(req, res) {
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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 !== process.env.GRAPHCMS_PREVIEW_SECRET ||
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!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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