Add text file preview window

2026-06-23 13:35:46 +02:00
parent e5c897c667
commit d5f278aae2
7 changed files with 171 additions and 3 deletions
@@ -0,0 +1,39 @@
+<?php
+require_once __DIR__ . '/common.php';
+
+const UNAV_PREVIEW_MAX_BYTES = 1048576;
+
+$resolved = unav_existing_path($_GET['path'] ?? null);
+if (!is_file($resolved['path'])) {
+    unav_error(400, 'Preview target must be a file');
+}
+
+$extension = strtolower(pathinfo($resolved['path'], PATHINFO_EXTENSION));
+$allowed = ['txt', 'log', 'md', 'rd', 'rst', 'yaml', 'yml', 'json', 'xml', 'csv', 'ini', 'cfg', 'conf', 'sh', 'php', 'js', 'css', 'html'];
+if (!in_array($extension, $allowed, true)) {
+    unav_error(415, 'Preview is not available for this file type');
+}
+
+$size = filesize($resolved['path']);
+if ($size === false) {
+    unav_error(500, 'Could not read file size');
+}
+if ($size > UNAV_PREVIEW_MAX_BYTES) {
+    unav_error(413, 'Preview file is larger than 1 MB');
+}
+
+$content = file_get_contents($resolved['path']);
+if ($content === false) {
+    unav_error(500, 'Could not read file');
+}
+if (strpos($content, "\0") !== false) {
+    unav_error(415, 'Preview is not available for binary files');
+}
+
+unav_json([
+    'path' => $resolved['path'],
+    'name' => basename($resolved['path']),
+    'size' => $size,
+    'extension' => $extension,
+    'content' => $content,
+]);