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Editing: rss-proxy.php

writable 0666

<?php
/*************************************************************************
 *  RSS-PROXY – /rss-proxy.php?slug=<slug>&feed=<rss_url>
 *
 *  ► Returns JSON: {"items":[{"title","link","date"},…],"url":"…"}
 *  ► Caches to /social/<slug>/rss-cache.json for 1 hour
 *  ► Timeouts: 3 s connect, 10 s download, 15 s script max
 *************************************************************************/
declare(strict_types=1);

// --------------- headers & timeouts ---------------
header('Content-Type: application/json; charset=utf-8');
set_time_limit(15);

// --------------- 1) validate inputs ---------------
$slug = preg_replace('/[^a-z0-9_]/i','', $_GET['slug'] ?? '');
$feed = $_GET['feed'] ?? '';

if (
    !$slug ||
    !filter_var($feed, FILTER_VALIDATE_URL)
) {
    http_response_code(400);
    echo json_encode(['error' => 'Bad or missing slug/feed']);
    exit;
}

// --------------- 2) prepare cache paths ---------------
$baseDir   = rtrim($_SERVER['DOCUMENT_ROOT'], '/');
$profileDir = "{$baseDir}/social/{$slug}";
$cacheFile = "{$profileDir}/rss-cache.json";
$cacheTTL  = 3600; // 1 hour

// --------------- 3) serve cache if fresh ---------------
if (is_file($cacheFile) && filemtime($cacheFile) > time() - $cacheTTL) {
    echo file_get_contents($cacheFile);
    exit;
}

// --------------- 4) fetch the RSS feed ---------------
$ch = curl_init($feed);
curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_FAILONERROR    => true,
    CURLOPT_FOLLOWLOCATION => true,
    CURLOPT_CONNECTTIMEOUT => 3,
    CURLOPT_TIMEOUT        => 10,
    CURLOPT_USERAGENT      => 'RSS-Proxy/1.0',
]);
$xmlData = curl_exec($ch);
curl_close($ch);

// --------------- 5) parse up to 5 items ---------------
$items = [];
if ($xmlData !== false) {
    $xml = @simplexml_load_string($xmlData, 'SimpleXMLElement', LIBXML_NOCDATA);
    if ($xml && isset($xml->channel->item)) {
        foreach ($xml->channel->item as $it) {
            $items[] = [
                'title' => (string)$it->title,
                'link'  => (string)$it->link,
                'date'  => (string)$it->pubDate,
            ];
            if (count($items) >= 5) {
                break;
            }
        }
    }
}

// --------------- 6) build JSON & write cache ---------------
$result = json_encode([
    'items' => $items,
    'url'   => $feed
], JSON_UNESCAPED_SLASHES);

// ensure the profile directory exists
if (!is_dir($profileDir)) {
    @mkdir($profileDir, 0755, true);
}

// write cache (silently fail if it can’t)
@file_put_contents($cacheFile, $result);

// --------------- 7) output ---------------
echo $result;

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Editing: rss-proxy.php

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