impress-2020/api/outfitImage.js

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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",
});
const { renderOutfitImage } = require("../src/server/outfit-images");
const VALID_LAYER_URLS = [
/^https:\/\/impress-asset-images\.s3\.amazonaws\.com\/(biology|object)\/[0-9]{3}\/[0-9]{3}\/[0-9]{3}\/[0-9]+\/(150|300)x(150|300)\.png(\?[a-zA-Z0-9_-]+)?$/,
/^http:\/\/images\.neopets\.com\/cp\/(bio|object|items)\/data\/[0-9]{3}\/[0-9]{3}\/[0-9]{3}\/[a-zA-Z0-9_-]+\/[a-zA-Z0-9_-]+\.svg$/,
];
async function handle(req, res) {
if (!req.query.layerUrls) {
res.setHeader("Content-Type", "text/plain");
return res.status(400).send(`Missing required parameter: layerUrls`);
}
const layerUrls = req.query.layerUrls.split(",");
const size = parseInt(req.query.size);
if (size !== 150 && size !== 300) {
res.setHeader("Content-Type", "text/plain");
return res.status(400).send(`Size must be 150 or 300`);
}
for (const layerUrl of layerUrls) {
if (!VALID_LAYER_URLS.some((pattern) => layerUrl.match(pattern))) {
return res.status(400).send(`Unexpected layer URL format: ${layerUrl}`);
}
}
let imageResult;
try {
imageResult = await renderOutfitImage(layerUrls, size);
} catch (e) {
console.error(e);
res.setHeader("Content-Type", "text/plain");
return res.status(400).send(`Error rendering image: ${e.message}`);
}
const { image, status } = imageResult;
if (status === "success") {
// On success, we use very aggressive caching, on the assumption that
// layers are ~immutable too, and that our rendering algorithm will almost
// never change in a way that requires pushing changes. If it does, we
// should add a cache-buster to the URL!
res.setHeader("Cache-Control", "public, max-age=604800, immutable");
res.status(200);
} else {
// On partial failure, we still send the image, but with a 500 status. We
// send a long-lived cache header, but in such a way that the user can
// refresh the page to try again. (`private` means the CDN won't cache it,
// and we don't send `immutable`, which would save it even across reloads.)
// The 500 won't really affect the client, which will still show the image
// without feedback to the user - but it's a helpful debugging hint.
res.setHeader("Cache-Control", "private, max-age=604800");
res.status(500);
}
res.setHeader("Content-Type", "image/png");
return res.send(image);
}
export default async (req, res) => {
beeline.withTrace({ name: "outfitImage" }, () => handle(req, res));
};