podcast: switch to server-side php proxy for rss feed

itunes api unreachable from browser on vps. podcast.php fetches
anchor.fm rss server-to-server, parses xml, returns json.
1h cache header to avoid hammering the feed.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 69 insertions, 0 deletions

diff --git a/podcast.php b/podcast.php
new file mode 100644
index 0000000..2447fbf
--- /dev/null
+++ b/podcast.php
@@ -0,0 +1,69 @@
+<?php
+header('Content-Type: application/json');
+header('Cache-Control: public, max-age=3600');
+header('Access-Control-Allow-Origin: *');
+
+$rss_url = 'https://anchor.fm/s/e8438774/podcast/rss';
+$limit = max(1, min(20, intval($_GET['limit'] ?? 6)));
+
+$ctx = stream_context_create(['http' => [
+  'timeout' => 8,
+  'user_agent' => 'Mozilla/5.0 (compatible; podcast-proxy/1.0)',
+]]);
+
+$xml = @file_get_contents($rss_url, false, $ctx);
+if ($xml === false) {
+  http_response_code(502);
+  echo json_encode(['error' => 'could not fetch feed']);
+  exit;
+}
+
+$feed = @simplexml_load_string($xml);
+if (!$feed) {
+  http_response_code(502);
+  echo json_encode(['error' => 'could not parse feed']);
+  exit;
+}
+
+$ns_itunes = 'http://www.itunes.com/dtds/podcast-1.0.dtd';
+
+// artwork from channel-level itunes:image
+$channel = $feed->channel;
+$itunes_ch = $channel->children($ns_itunes);
+$art = (string)($itunes_ch->image->attributes()['href'] ?? '');
+
+$episodes = [];
+foreach ($channel->item as $item) {
+  if (count($episodes) >= $limit) break;
+  $itunes = $item->children($ns_itunes);
+  $duration_raw = (string)($itunes->duration ?? '');
+
+  // normalize duration to h:mm or Xm
+  if (strpos($duration_raw, ':') !== false) {
+    $parts = array_map('intval', explode(':', $duration_raw));
+    if (count($parts) === 3) {
+      [$h, $m, $s] = $parts;
+      $duration = $h > 0 ? "{$h}:" . str_pad($m, 2, '0', STR_PAD_LEFT) : "{$m}m";
+    } else {
+      [$m, $s] = $parts;
+      $duration = "{$m}m";
+    }
+  } elseif (is_numeric($duration_raw)) {
+    $secs = intval($duration_raw);
+    $h = intdiv($secs, 3600);
+    $m = intdiv($secs % 3600, 60);
+    $duration = $h > 0 ? "{$h}:" . str_pad($m, 2, '0', STR_PAD_LEFT) : "{$m}m";
+  } else {
+    $duration = '';
+  }
+
+  $link = (string)($item->link ?? $item->enclosure->attributes()['url'] ?? '#');
+
+  $episodes[] = [
+    'title' => (string)$item->title,
+    'url'   => $link,
+    'duration' => $duration,
+  ];
+}
+
+echo json_encode(['art' => $art, 'episodes' => $episodes]);