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a tool for shared writing and social publishing
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4.6 kB · 162 lines
TypeScript
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163export const maxDuration = 60;export const runtime = "nodejs";
import { NextRequest } from "next/server";import * as z from "zod";import { createClient } from "@supabase/supabase-js";import { Database } from "supabase/database.types";let supabase = createClient<Database>( process.env.NEXT_PUBLIC_SUPABASE_API_URL as string, process.env.SUPABASE_SERVICE_ROLE_KEY as string,);
export type LinkPreviewBody = { url: string; type: "meta" | "image" };export async function POST(req: NextRequest) { let body = (await req.json()) as LinkPreviewBody; let url = encodeURIComponent(body.url); if (body.type === "meta") { let result = await get_link_metadata(url); return Response.json(result); } else { let result = await get_link_image_preview(url); return Response.json(result); }}
export type LinkPreviewMetadataResult = ReturnType<typeof get_link_metadata>;export type LinkPreviewImageResult = ReturnType<typeof get_link_image_preview>;
async function get_link_image_preview(url: string) { let image = await fetch( `https://pro.microlink.io/?url=${url}&screenshot&viewport.width=1400&viewport.height=1213&embed=screenshot.url&meta=false&force=true`, { headers: { "x-api-key": process.env.MICROLINK_API_KEY!, }, next: { revalidate: 600, }, }, ); let key = await hash(url); if (image.status === 200) { await supabase.storage .from("url-previews") .upload(key, await image.arrayBuffer(), { contentType: image.headers.get("content-type") || undefined, upsert: true, }); } else { console.log("an error occured rendering the website", await image.text()); }
return { url: supabase.storage.from("url-previews").getPublicUrl(key, { transform: { width: 240, height: 208, resize: "contain" }, }).data.publicUrl, height: 208, width: 240, };}const hash = async (str: string) => { let hashBuffer = await crypto.subtle.digest( "SHA-256", new TextEncoder().encode(str), ); const hashArray = Array.from(new Uint8Array(hashBuffer)); const hashHex = hashArray .map((byte) => byte.toString(16).padStart(2, "0")) .join(""); return hashHex;};
async function get_link_metadata(url: string) { let response = await fetch( `https://iframe.ly/api/iframely?url=${url}&api_key=${process.env.IFRAMELY_KEY!}&_layout=standard`, { headers: { Accept: "application/json", }, next: { revalidate: 60 * 10, }, }, );
let json = await response.json(); console.log(json); let result = iframelyApiResponse.safeParse(json); console.log(result.error); return result;}
// Iframely API response type - minimal structure based on docslet iframelyApiResponse = z.object({ url: z.string(), meta: z .object({ title: z.string().optional(), description: z.string().optional(), author: z.string().optional(), author_url: z.string().optional(), site: z.string().optional(), canonical: z.string().optional(), duration: z.number().optional(), date: z.string().optional(), medium: z.string().optional(), }) .optional(), links: z .object({ player: z .array( z.object({ href: z.string(), rel: z.array(z.string()), type: z.string(), media: z .object({ "aspect-ratio": z.number().optional(), height: z.number().optional(), width: z.number().optional(), }) .optional(), html: z.string().optional(), }), ) .optional(), thumbnail: z .array( z.object({ href: z.string(), rel: z.array(z.string()), type: z.string(), media: z .object({ height: z.number().optional(), width: z.number().optional(), }) .optional(), }), ) .optional(), image: z .array( z.object({ href: z.string(), rel: z.array(z.string()), type: z.string(), media: z .object({ height: z.number().optional(), width: z.number().optional(), }) .optional(), }), ) .optional(), }) .optional(), html: z.string().optional(), rel: z.array(z.string()).optional(),});