john
57 lines
1.8 KiB
JavaScript
57 lines
1.8 KiB
JavaScript
import http from 'node:http';
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import { request as httpRequest } from 'node:http';
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const listenHost = process.env.IMGPROXY_COMPAT_HOST || '10.10.0.2';
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const listenPort = Number(process.env.IMGPROXY_COMPAT_PORT || 20081);
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const upstream = new URL(process.env.IMGPROXY_UPSTREAM || 'http://127.0.0.1:20082');
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function convertPath(url) {
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if (url === '/health') return '/health';
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const pathname = url.split('?')[0] || '/';
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const match = pathname.match(/^(?:\/[^/]+)?\/unsafe\/(\d+)x(\d+)\/(\d+)\/([a-z0-9]+)\/(.+)$/i);
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if (!match) return pathname;
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const [, width, height, quality, format, encodedSource] = match;
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let source;
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source = encodedSource;
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for (let i = 0; i < 3; i += 1) {
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try {
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const decoded = decodeURIComponent(source);
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if (decoded === source) break;
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source = decoded;
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} catch {
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break;
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}
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}
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if (source.startsWith('local://') && !source.startsWith('local:///')) {
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source = `local:///${source.slice('local://'.length)}`;
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}
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return `/unsafe/rs:fit:${width}:${height}/q:${quality}/plain/${source}@${format}`;
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}
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const server = http.createServer((req, res) => {
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const upstreamPath = convertPath(req.url || '/');
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const options = {
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hostname: upstream.hostname,
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port: upstream.port || 80,
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method: req.method,
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path: upstreamPath,
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headers: {
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...req.headers,
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host: upstream.host,
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},
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};
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const proxy = httpRequest(options, (upstreamRes) => {
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res.writeHead(upstreamRes.statusCode || 502, upstreamRes.headers);
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upstreamRes.pipe(res);
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});
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proxy.on('error', (err) => {
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res.writeHead(502, { 'content-type': 'text/plain' });
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res.end(`imgproxy compat proxy error: ${err.message}`);
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});
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req.pipe(proxy);
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});
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server.listen(listenPort, listenHost, () => {
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console.log(`imgproxy compat proxy listening on ${listenHost}:${listenPort}, upstream ${upstream.href}`);
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});
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