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import { getDraftPost } from "@/lib/api";
import { BUILDER_CONFIG } from "@/lib/constants";
import querystring from "querystring";
export default async function preview(req, res) {
const postId = req.query[`builder.overrides.${BUILDER_CONFIG.postsModel}`];
if (req.query.secret !== BUILDER_CONFIG.previewSecret || !postId) {
return res.status(401).json({ message: "Invalid request" });
}
// Check if the post with the given `slug` exists
const post = await getDraftPost(postId);
// If the slug doesn't exist prevent preview mode from being enabled
if (!post) {
return res.status(401).json({ message: "Invalid post" });
}
// Enable Preview Mode by setting the cookies
res.setPreviewData({
postDraftId: postId,
});
// Redirect to the path from the fetched post
// We don't redirect to req.query.slug as that might lead to open redirect vulnerabilities
res.writeHead(307, {
Location: `/posts/${post.data.slug}?${querystring.stringify(req.query)}`,
});
res.end();
}
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