787168b248
- Font preload eliminates layout shift (CLS 0) - Dual accent colors: --accent for filled buttons, --accent-text for text on dark bg - All WCAG AA contrast ratios met (buttons, links, badges, countdown) - Language picker: position absolute instead of fixed - CoinGecko rates proxied with 2min server-side cache (no CORS, no rate limit) - English as default inline text (no empty→text shift)
54 lines
1.6 KiB
PHP
54 lines
1.6 KiB
PHP
<?php
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header('Content-Type: application/json');
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// Server-side cache: fetch from CoinGecko at most once per 2 minutes
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$cacheFile = __DIR__ . '/../data/rates_cache.json';
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$cacheTTL = 120; // seconds
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if (file_exists($cacheFile)) {
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$cached = json_decode(file_get_contents($cacheFile), true);
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if ($cached && (time() - ($cached['_time'] ?? 0)) < $cacheTTL) {
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unset($cached['_time']);
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header('Cache-Control: public, max-age=60');
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echo json_encode($cached);
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exit;
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}
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}
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$url = 'https://api.coingecko.com/api/v3/simple/price?ids=monero&vs_currencies=eur,usd,chf';
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$ch = curl_init($url);
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curl_setopt_array($ch, [
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CURLOPT_RETURNTRANSFER => true,
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CURLOPT_TIMEOUT => 10,
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CURLOPT_HTTPHEADER => ['Accept: application/json', 'User-Agent: xmrpay.link/1.0'],
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]);
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$response = curl_exec($ch);
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$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
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curl_close($ch);
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if ($response !== false && $httpCode === 200) {
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$data = json_decode($response, true);
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if ($data) {
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$data['_time'] = time();
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file_put_contents($cacheFile, json_encode($data));
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unset($data['_time']);
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header('Cache-Control: public, max-age=60');
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echo json_encode($data);
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exit;
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}
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}
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// On error, serve stale cache if available
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if (file_exists($cacheFile)) {
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$cached = json_decode(file_get_contents($cacheFile), true);
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if ($cached) {
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unset($cached['_time']);
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header('Cache-Control: public, max-age=30');
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echo json_encode($cached);
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exit;
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}
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}
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http_response_code(502);
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echo json_encode(['error' => 'Failed to fetch rates']);
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