55 lines
1.9 KiB
JavaScript
55 lines
1.9 KiB
JavaScript
import util from "util";
|
|
import stream from "stream";
|
|
import fetch from "node-fetch";
|
|
|
|
const streamPipeline = util.promisify(stream.pipeline);
|
|
|
|
const VALID_URL_PATTERNS = [
|
|
/^http:\/\/images\.neopets\.com\/items\/[a-zA-Z0-9_ -]+\.gif$/,
|
|
/^http:\/\/images\.neopets\.com\/cp\/(bio|items)\/data\/[0-9]{3}\/[0-9]{3}\/[0-9]{3}\/[a-f0-9_]+\/[a-zA-Z0-9_\-\/]+\.(svg|png|js)$/,
|
|
/^http:\/\/images\.neopets\.com\/cp\/(bio|items)\/swf\/[0-9]{3}\/[0-9]{3}\/[0-9]{3}\/[a-f0-9_]+\.swf$/,
|
|
];
|
|
|
|
export default async (req, res) => {
|
|
const urlToProxy = req.query.url;
|
|
if (!urlToProxy) {
|
|
return res
|
|
.status(400)
|
|
.send("Bad request: Must provide `?url` in the query string");
|
|
}
|
|
|
|
if (!VALID_URL_PATTERNS.some((p) => urlToProxy.match(p))) {
|
|
return res
|
|
.status(400)
|
|
.send("Bad request: URL did not match any valid patterns");
|
|
}
|
|
|
|
console.debug("[assetProxy] 💌 Sending: %s", urlToProxy);
|
|
|
|
const proxyRes = await fetch(urlToProxy);
|
|
console.debug(
|
|
`[assetProxy] %s %s: %s`,
|
|
proxyRes.ok ? "✅" : "🛑",
|
|
`${proxyRes.status} ${proxyRes.statusText}`.padStart(7, " "),
|
|
urlToProxy
|
|
);
|
|
|
|
res.status(proxyRes.status);
|
|
|
|
res.setHeader("Cache-Control", proxyRes.headers.get("Cache-Control"));
|
|
res.setHeader("ETag", proxyRes.headers.get("ETag"));
|
|
res.setHeader("Last-Modified", proxyRes.headers.get("Last-Modified"));
|
|
|
|
if (!proxyRes.headers.get("Content-Encoding")) {
|
|
// If the content is not encoded (I think their images generally aren't?),
|
|
// stream the body directly, to speed things up a bit.
|
|
res.setHeader("Content-Length", proxyRes.headers.get("Content-Length"));
|
|
res.setHeader("Content-Type", proxyRes.headers.get("Content-Type"));
|
|
await streamPipeline(proxyRes.body, res);
|
|
} else {
|
|
// Otherwise, I don't immediately know how to stream encoded content, so,
|
|
// let's just await the full body and send it the normal way.
|
|
const buffer = await proxyRes.buffer();
|
|
res.send(buffer);
|
|
}
|
|
};
|