initial import

2026-05-25 13:47:46 +02:00
parent 3e7f238cf4
commit 97f23260ed
32 changed files with 8898 additions and 0 deletions
@@ -0,0 +1,196 @@
+<?php
+/*
+ * Shared handling for the Racket installation zip and its binary parts.
+ */
+
+define('RACKET_ZIP_FILE', __DIR__ . '/config/racket.zip');
+define('RACKET_ZIP_DATA_DIR', __DIR__ . '/data');
+define('RACKET_ZIP_PART_PREFIX', 'racket-part-');
+define('RACKET_ZIP_MANIFEST_FILE', RACKET_ZIP_DATA_DIR . '/racket-parts.json');
+
+function racket_zip_binary_chunk_bytes_for_base64_kib($kib)
+{
+    return intdiv(((int)$kib) * 1024, 4) * 3;
+}
+
+function racket_zip_part_name($nr)
+{
+    return RACKET_ZIP_PART_PREFIX . sprintf('%06d', $nr);
+}
+
+function racket_zip_part_file($partNumber)
+{
+    return RACKET_ZIP_DATA_DIR . '/' . RACKET_ZIP_PART_PREFIX . $partNumber;
+}
+
+function racket_zip_ensure_data_dir()
+{
+    if (!is_dir(RACKET_ZIP_DATA_DIR)) {
+        if (!mkdir(RACKET_ZIP_DATA_DIR, 0755, true)) {
+            throw new RuntimeException('Kan data directory niet maken: ' . RACKET_ZIP_DATA_DIR);
+        }
+    }
+
+    if (!is_writable(RACKET_ZIP_DATA_DIR)) {
+        throw new RuntimeException('Data directory is niet schrijfbaar: ' . RACKET_ZIP_DATA_DIR);
+    }
+}
+
+function racket_zip_remove_old_parts()
+{
+    foreach (glob(RACKET_ZIP_DATA_DIR . '/' . RACKET_ZIP_PART_PREFIX . '*') ?: array() as $file) {
+        if (is_file($file)) {
+            @unlink($file);
+        }
+    }
+
+    if (is_file(RACKET_ZIP_MANIFEST_FILE)) {
+        @unlink(RACKET_ZIP_MANIFEST_FILE);
+    }
+}
+
+function split_racket_zip_parts($maxBase64Kib)
+{
+    $maxBase64Bytes = (int)$maxBase64Kib * 1024;
+    $binaryChunkBytes = racket_zip_binary_chunk_bytes_for_base64_kib($maxBase64Kib);
+
+    if ($binaryChunkBytes < 3) {
+        throw new RuntimeException('Ongeldige racket.zip base64 chunk-instelling.');
+    }
+
+    if (!is_file(RACKET_ZIP_FILE) || !is_readable(RACKET_ZIP_FILE)) {
+        throw new RuntimeException('racket.zip ontbreekt of is niet leesbaar: ' . RACKET_ZIP_FILE);
+    }
+
+    racket_zip_ensure_data_dir();
+    racket_zip_remove_old_parts();
+
+    $in = fopen(RACKET_ZIP_FILE, 'rb');
+
+    if ($in === false) {
+        throw new RuntimeException('Kan racket.zip niet openen.');
+    }
+
+    $parts = array();
+    $nr = 1;
+    $totalBinaryBytes = 0;
+
+    while (!feof($in)) {
+        $buf = fread($in, $binaryChunkBytes);
+
+        if ($buf === false) {
+            fclose($in);
+            throw new RuntimeException('Fout bij lezen van racket.zip.');
+        }
+
+        if ($buf === '') {
+            break;
+        }
+
+        $name = racket_zip_part_name($nr);
+        $file = RACKET_ZIP_DATA_DIR . '/' . $name;
+
+        if (file_put_contents($file, $buf, LOCK_EX) === false) {
+            fclose($in);
+            throw new RuntimeException('Kan part niet schrijven: ' . $file);
+        }
+
+        $n = sprintf('%06d', $nr);
+        $binaryBytes = strlen($buf);
+
+        $parts[] = array(
+            'number' => $n,
+            'name' => $name,
+            'file' => $file,
+            'size' => $binaryBytes,
+        );
+
+        $totalBinaryBytes += $binaryBytes;
+        $nr++;
+    }
+
+    fclose($in);
+
+    if (count($parts) === 0) {
+        throw new RuntimeException('racket.zip lijkt leeg te zijn.');
+    }
+
+    $manifest = array(
+        'source_file' => RACKET_ZIP_FILE,
+        'source_bytes' => filesize(RACKET_ZIP_FILE),
+        'source_mtime' => filemtime(RACKET_ZIP_FILE),
+        'source_sha256' => hash_file('sha256', RACKET_ZIP_FILE),
+        'max_base64_kib' => (int)$maxBase64Kib,
+        'max_base64_bytes' => $maxBase64Bytes,
+        'binary_chunk_bytes' => $binaryChunkBytes,
+        'part_count' => count($parts),
+        'total_binary_bytes' => $totalBinaryBytes,
+        'parts' => $parts,
+        'created_at' => gmdate('c'),
+    );
+
+    if (file_put_contents(
+        RACKET_ZIP_MANIFEST_FILE,
+        json_encode($manifest, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES) . "\n",
+        LOCK_EX
+    ) === false) {
+        throw new RuntimeException('Kan racket.zip manifest niet schrijven: ' . RACKET_ZIP_MANIFEST_FILE);
+    }
+
+    return $manifest;
+}
+
+function load_racket_zip_parts_manifest()
+{
+    if (!is_file(RACKET_ZIP_MANIFEST_FILE) || !is_readable(RACKET_ZIP_MANIFEST_FILE)) {
+        throw new RuntimeException('racket.zip parts-manifest ontbreekt: ' . RACKET_ZIP_MANIFEST_FILE);
+    }
+
+    $raw = file_get_contents(RACKET_ZIP_MANIFEST_FILE);
+
+    if ($raw === false) {
+        throw new RuntimeException('Kan racket.zip parts-manifest niet lezen: ' . RACKET_ZIP_MANIFEST_FILE);
+    }
+
+    $manifest = json_decode($raw, true);
+
+    if (!is_array($manifest)) {
+        throw new RuntimeException('racket.zip parts-manifest is geen geldige JSON: ' . RACKET_ZIP_MANIFEST_FILE);
+    }
+
+    return $manifest;
+}
+
+function racket_zip_parts_current($manifest, $maxBase64Kib)
+{
+    if (!is_array($manifest)) {
+        return false;
+    }
+
+    if ((int)($manifest['max_base64_kib'] ?? 0) !== (int)$maxBase64Kib) {
+        return false;
+    }
+
+    if (!is_file(RACKET_ZIP_FILE)) {
+        return false;
+    }
+
+    if ((int)($manifest['source_bytes'] ?? -1) !== (int)filesize(RACKET_ZIP_FILE)) {
+        return false;
+    }
+
+    if ((int)($manifest['source_mtime'] ?? -1) !== (int)filemtime(RACKET_ZIP_FILE)) {
+        return false;
+    }
+
+    foreach (($manifest['parts'] ?? array()) as $part) {
+        $number = (string)($part['number'] ?? '');
+        $file = racket_zip_part_file($number);
+
+        if (!preg_match('/^[0-9]{6}$/', $number) || !is_file($file) || !is_readable($file)) {
+            return false;
+        }
+    }
+
+    return count($manifest['parts'] ?? array()) > 0;
+}