79 lines
2.2 KiB
TypeScript
79 lines
2.2 KiB
TypeScript
interface Env {}
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import { bech32 } from "./bech32";
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import { fromHex } from "./hex";
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interface NostrJson {
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names: Record<string, string>;
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}
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const HOST = "snort.social";
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async function fetchNostrAddress(name: string, domain: string) {
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try {
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const res = await fetch(`https://${domain}/.well-known/nostr.json?name=${encodeURIComponent(name)}`, {
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signal: AbortSignal.timeout(1000),
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});
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const data: NostrJson = await res.json();
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const match = Object.keys(data.names).find(n => {
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return n.toLowerCase() === name.toLowerCase();
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});
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return match ? data.names[match] : undefined;
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} catch {
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// ignored
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}
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}
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export const onRequest: PagesFunction<Env> = async context => {
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const u = new URL(context.request.url);
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const prefixes = ["npub1", "nprofile1", "naddr1", "nevent1", "note1"];
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const isEntityPath = () => {
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return prefixes.some(
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a => u.pathname.startsWith(`/${a}`) || u.pathname.startsWith(`/e/${a}`) || u.pathname.startsWith(`/p/${a}`),
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);
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};
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const nostrAddress = u.pathname.match(/^\/([a-zA-Z0-9_]+)$/i);
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const next = await context.next();
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if (u.pathname != "/" && (isEntityPath() || nostrAddress)) {
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try {
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let id = nostrAddress ? nostrAddress[1] : u.pathname.split("/").at(-1);
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if (nostrAddress) {
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const pubkey = await fetchNostrAddress(id, HOST);
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if (pubkey) {
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id = bech32.encode("npub", bech32.toWords(fromHex(pubkey)));
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} else {
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return next;
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}
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}
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const rsp = await fetch(
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`http://nostr.api.v0l.io/api/v1/opengraph/${id}?canonical=${encodeURIComponent(`https://${HOST}/%s`)}`,
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{
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method: "POST",
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body: await next.arrayBuffer(),
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headers: {
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"user-agent": `SnortFunctions/1.0 (https://${HOST})`,
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"content-type": "text/html",
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accept: "text/html",
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},
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},
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);
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if (rsp.ok) {
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const body = await rsp.text();
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if (body.length > 0) {
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return new Response(body, {
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headers: {
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"content-type": "text/html",
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},
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});
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}
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}
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} catch {
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// ignore
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}
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}
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return next;
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};
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