feat: add videodb media index with Docker stack

- Add videodb PHP/MySQL media collection manager (Blu-ray, DVD, CD) - Dockerfile: PHP 8.1 + Apache with GD/mysqli/exif extensions - docker-compose.yml: app on port 6761 + MySQL 8.0 with health checks - docker-entrypoint.sh: auto-generates config.inc.php from env vars, waits for MySQL, initializes DB schema idempotently - init-db.php: CLI schema installer using app's own prefix_query() logic - Persistent volumes for DB, cache, and cover images Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-05-11 09:49:52 +02:00
commit f55c91276e
1230 changed files with 252321 additions and 0 deletions
--- a/videodb/core/httpcache.php
+++ b/videodb/core/httpcache.php
@@ -0,0 +1,111 @@
+<?php
+/**
+ * HTTP caching functions
+ *
+ * Enable use of HTTP 304 headers for unmodified content to save bandwidth
+ *
+ * @package Core
+ * @author  Andreas Götz    <cpuidle@gmx.de>
+ * @version $Id: httpcache.php,v 1.5 2010/11/05 10:38:47 andig2 Exp $
+ */
+
+/**
+ * Start output buffering
+ */
+function httpCacheCaptureStart()
+{
+    ob_start();
+}
+
+/**
+ * Stop output buffering
+ *
+ * @param   string  MD5 hash of content
+ */
+function httpCacheCaptureEnd()
+{
+    $content = ob_get_contents();
+    ob_end_clean();
+
+    return $content;
+}
+
+/**
+ * Get last modified data for given etag
+ * Checks session for known etag and timestamp
+ */
+function httpCacheCheckTag($template, $etag)
+{
+    if ($etag != $_SESSION['vdb'][$template]['etag'])
+    {
+        $lastmod = time();
+        $_SESSION['vdb'][$template]['etag'] = $etag;
+        $_SESSION['vdb'][$template]['time'] = $lastmod;
+    }
+    else
+    {
+        $lastmod = $_SESSION['vdb'][$template]['time'];
+    }
+    return($lastmod);
+}
+
+/**
+ * Output 304 Not Modified header
+ * Require browser to re-check on next request
+ */
+function httpCacheHeaders($etag, $expires)
+{
+    header(php_sapi_name() == 'cgi' ? 'Status: 304 Not Modified' : 'HTTP/1.x 304 Not Modified');
+    header("ETag: {$etag}");
+    header("Cache-Control: private, max-age={$expires}, pre-check=0, post-check=0");
+    header("Content-Length: 0");
+
+    header("Content-Type: !invalid");
+    exit();
+}
+
+/**
+ * Check if output was modified since last request
+ * If unmodifed, output 304 Not Modified header
+ * Otherwise add additional ETag and LastModified headers
+ */
+function httpCacheOutput($template, $content)
+{
+    $etag = '"'.md5($content).'"';
+
+    // check if 'sending' is necessary (using cache functions)
+    $sendbody = true;
+    $expires  = 0;
+
+    $lastmod  = httpCacheCheckTag($template, $etag);
+
+    // check 'If-Modified-Since' header
+    if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && gmdate('D, d M Y H:i:s', $lastmod)." GMT" == trim($_SERVER['HTTP_IF_MODIFIED_SINCE']))
+    {
+        httpCacheHeaders($etag, $expires);
+    }
+
+    // check 'If-None-Match' header (ETag)
+    if ($sendbody && isset($_SERVER['HTTP_IF_NONE_MATCH']))
+    {
+        $inm = explode(',', $_SERVER['HTTP_IF_NONE_MATCH']);
+        foreach ($inm as $i)
+        {
+            if (trim($i) != $etag) continue;
+            httpCacheHeaders($etag, $expires);
+        }
+    }
+
+    // send with caching headers (enable cache for one day)
+    $exp_gmt = gmdate('D, d M Y H:i:s', time() + $expires).' GMT';
+    $mod_gmt = gmdate('D, d M Y H:i:s', $lastmod).' GMT';
+    header("Expires: {$exp_gmt}");
+    header("Last-Modified: {$mod_gmt}");
+    header("Cache-Control: private, max-age={$expires}, pre-check=0, post-check=0");
+    header("Pragma: !invalid");
+    header("ETag: {$etag}");
+
+    echo $content;
+}
+
+?>