impress-2020/api/outfitPageSSR.js

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/**
* /api/outfitPageSSR also serves the initial request for /outfits/:id, to
* add title and meta tags. This primarily for sharing, like on Discord or
* Twitter or Facebook!
*
* The route is configured in vercel.json, at the project root.
*
* To be honest, we probably should have built Impress 2020 on Next.js, and
* then we'd be getting realistic server-side rendering across practically the
* whole app very cheaply. But this is a good hack for what we have!
*
* TODO: We could add the basic outfit page layout and image preview, to use
* SSR to decrease time-to-first-content for the end-user, too
*/
const beeline = require("honeycomb-beeline")({
writeKey: process.env["HONEYCOMB_WRITE_KEY"],
dataset:
process.env["NODE_ENV"] === "production"
? "Dress to Impress (2020)"
: "Dress to Impress (2020, dev)",
serviceName: "impress-2020-gql-server",
});
import escapeHtml from "escape-html";
import fetch from "node-fetch";
import connectToDb from "../src/server/db";
import { normalizeRow } from "../src/server/util";
async function handle(req, res) {
// Load index.html as our initial page content. If this fails, it probably
// means something is misconfigured in a big way; we don't have a great way
// to recover, and we'll just show an error message.
let initialHtml;
try {
initialHtml = await loadIndexPageHtml();
} catch (e) {
console.error("Error loading index.html:", e);
return reject(res, "Sorry, there was an error loading this outfit page!");
}
// Load the given outfit by ID. If this fails, it's possible that it's just a
// problem with the SSR, and the client will be able to handle it better
// anyway, so just show the standard index.html and let the app load
// normally, as if there was no error. (We'll just log it.)
let outfit;
try {
outfit = await loadOutfitData(req.query.id);
} catch (e) {
console.error("Error loading outfit data:", e);
return sendHtml(res, initialHtml, 200);
}
// Similarly, if the outfit isn't found, we just show index.html - but with a
// 404 and a gentler log message.
if (outfit == null) {
console.info(`Outfit not found: ${req.query.id}`);
return sendHtml(res, initialHtml, 404);
}
const outfitName = outfit.name || "Untitled outfit";
// Okay, now let's rewrite the HTML to include some outfit data!
//
// WARNING!!!
// Be sure to always use `escapeHtml` when inserting user data!!
// WARNING!!!
//
let html = initialHtml;
// Add the outfit name to the title.
html = html.replace(
/<title>(.*)<\/title>/,
`<title>${escapeHtml(outfitName)} | Dress to Impress</title>`
);
// Add sharing meta tags just before the </head> tag.
const updatedAtTimestamp = Math.floor(
new Date(outfit.updatedAt).getTime() / 1000
);
const outfitUrl =
`https://impress-2020.openneo.net/outfits` +
`/${encodeURIComponent(outfit.id)}`;
const imageUrl =
`https://impress-outfit-images.openneo.net/outfits` +
`/${encodeURIComponent(outfit.id)}` +
`/v/${encodeURIComponent(updatedAtTimestamp)}` +
`/600.png`;
const metaTags = `
<meta property="og:title" content="${escapeHtml(outfitName)}">
<meta property="og:type" content="website">
<meta property="og:image" content="${escapeHtml(imageUrl)}">
<meta property="og:url" content="${escapeHtml(outfitUrl)}">
<meta property="og:site_name" content="Dress to Impress">
<meta property="og:description" content="A custom Neopets outfit, designed on Dress to Impress!">
`;
html = html.replace(/<\/head>/, `${metaTags}</head>`);
console.info(`Successfully SSR'd outfit ${outfit.id}`);
return sendHtml(res, html);
}
async function loadOutfitData(id) {
const db = await connectToDb();
const [rows] = await db.query(`SELECT * FROM outfits WHERE id = ?;`, [id]);
if (rows.length === 0) {
return null;
}
return normalizeRow(rows[0]);
}
let cachedIndexPageHtml = null;
async function loadIndexPageHtml() {
if (cachedIndexPageHtml == null) {
// Request the same built copy of index.html that we're already serving at
// our homepage.
const homepageUrl = process.env.VERCEL_URL
? `https://${process.env.VERCEL_URL}/`
: process.env.NODE_ENV === "development"
? "http://localhost:3000/"
: "https://impress-2020.openneo.net/";
const liveIndexPageHtml = await fetch(homepageUrl).then((res) =>
res.text()
);
cachedIndexPageHtml = liveIndexPageHtml;
}
return cachedIndexPageHtml;
}
function reject(res, message, status = 400) {
res.setHeader("Content-Type", "text/plain");
return res.status(status).send(message);
}
function sendHtml(res, html, status = 200) {
res.setHeader("Content-Type", "text/html");
return res.status(status).send(html);
}
async function handleWithBeeline(req, res) {
beeline.withTrace(
{ name: "api/outfitPageSSR", operation_name: "api/outfitPageSSR" },
() => handle(req, res)
);
}
export default handleWithBeeline;