31 lines
1.2 KiB
JavaScript
31 lines
1.2 KiB
JavaScript
import {readFileSync} from 'node:fs';
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import {createServer} from 'node:http';
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import {URL} from 'node:url';
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const data = readFileSync(process.env.SITES_FILE || 'webring.txt', 'utf-8');
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const sites = [...data.matchAll(/^\s*([^#\s].*)\s*$/gm)].map(match => match[1]);
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const text = (response, body, code = 200) => {
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response.writeHead(code, {'Content-Type': 'text/plain'}).write(body);
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response.end();
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};
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const redirect = (res, url) => res.writeHead(302, {Location: url}).end();
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const toSite = (response, from, offset) => {
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const index = sites.findIndex(site => site === from);
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if (!from || index === -1) {
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return text(response, 'the provided site is not in the webring', 400);
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}
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redirect(response, sites[(index + offset + sites.length) % sites.length]);
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};
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const pathHandlers = {
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'/prev': (response, query) => toSite(response, query.get('from'), -1),
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'/next': (response, query) => toSite(response, query.get('from'), +1),
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'/list': response => text(response, sites.join('\n')),
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};
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createServer((request, response) => {
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const url = new URL(request.url, `http://${request.headers.host}`);
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pathHandlers[url.pathname]?.(response, url.searchParams);
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}).listen(process.env.PORT || 80);
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