Refine school script diagnostics and document-state capture

2026-10-15 15:15:42 +08:00
parent a4c2df838e
commit 83b0c7e177
16 changed files with 435 additions and 27 deletions
@@ -0,0 +1,126 @@
+import 'dart:convert';
+
+import 'package:webview_flutter/webview_flutter.dart';
+
+import '../../services/diagnostic_log.dart';
+
+/// Convert errors into fixed labels; never export the original console text.
+String? schoolConsoleCode(String message) {
+  final text = message.toLowerCase();
+  if (text.contains('mixed content')) return 'mixed_content';
+  if (text.contains('content security policy')) {
+    return 'content_security_policy';
+  }
+  if (text.contains('cors')) return 'cross_origin';
+  if (text.contains('refused to')) return 'resource_refused';
+  if (text.contains('referenceerror')) {
+    if (RegExp(r'(?:jquery|\$) is not defined').hasMatch(text)) {
+      return 'jquery_missing';
+    }
+    if (text.contains('beangle is not defined')) return 'beangle_missing';
+    if (text.contains('require is not defined')) return 'require_missing';
+    return 'reference_error';
+  }
+  if (text.contains('syntaxerror')) return 'syntax_error';
+  if (text.contains('typeerror')) return 'type_error';
+  if (text.contains('securityerror')) return 'security_error';
+  if (text.contains('evalerror')) return 'eval_error';
+  if (text.contains('rangeerror')) return 'range_error';
+  return null;
+}
+
+// Counts and known library booleans only. This never reads text, forms, cookies,
+// storage, or resource URLs. A different document or login form returns null.
+const schoolPageDiagnosticsScript = r'''(() => {
+  if(location.href!==__EXPECTED_URL__ || document.querySelector('input[type="password"]'))return 'null';
+  const links=Array.from(document.querySelectorAll('link[rel~="stylesheet"]'));
+  const resources=performance.getEntriesByType('resource');
+  return JSON.stringify({scripts:document.scripts.length,styles:document.styleSheets.length,
+    links:links.length,loaded:links.filter(link=>link.sheet!==null).length,
+    jquery:typeof window.jQuery==='function',beangle:window.beangle!==null && typeof window.beangle==='object',
+    require:typeof window.require==='function',
+    script202:resources.filter(r=>r.initiatorType==='script' && r.responseStatus===202).length,
+    style202:resources.filter(r=>r.initiatorType==='link' && r.responseStatus===202).length});
+})()''';
+
+void recordSchoolPageState(DiagnosticLog log, String school, Object raw) {
+  dynamic value = raw;
+  try {
+    for (var i = 0; i < 2 && value is String; i++) {
+      value = jsonDecode(value);
+    }
+    if (value is! Map) return;
+    const counts = [
+      'scripts',
+      'styles',
+      'links',
+      'loaded',
+      'script202',
+      'style202',
+    ];
+    const libraries = ['jquery', 'beangle', 'require'];
+    if (counts.any(
+          (key) => value[key] is! int || value[key] < 0 || value[key] > 100000,
+        ) ||
+        libraries.any((key) => value[key] is! bool)) {
+      return;
+    }
+    for (final key in counts) {
+      if ((key == 'script202' || key == 'style202') && value[key] == 0) {
+        continue;
+      }
+      log.add(
+        'school_asset_state',
+        fields: {
+          'school': school,
+          'code': key == 'script202'
+              ? 'script_202'
+              : key == 'style202'
+              ? 'stylesheet_202'
+              : key,
+          'count': value[key] as int,
+        },
+      );
+    }
+    if (school == 'undergraduate') {
+      for (final key in libraries) {
+        log.add(
+          'school_library_state',
+          fields: {'school': school, 'code': key, 'result': value[key] as bool},
+        );
+      }
+    }
+  } catch (_) {
+    /* Diagnostics must not interfere with the school page. */
+  }
+}
+
+Future<void> recordSchoolPageDiagnostics(
+  WebViewController web,
+  String school,
+  String url, {
+  bool Function()? isCurrent,
+}) async {
+  final uri = Uri.tryParse(url);
+  if (uri == null ||
+      uri.scheme != 'https' ||
+      !const {'eams.uestc.edu.cn', 'yjsjy.uestc.edu.cn'}.contains(uri.host)) {
+    return;
+  }
+  try {
+    if (isCurrent?.call() == false) return;
+    if (await web.currentUrl() != url || isCurrent?.call() == false) return;
+    final raw = await web.runJavaScriptReturningResult(
+      schoolPageDiagnosticsScript.replaceAll(
+        '__EXPECTED_URL__',
+        jsonEncode(url),
+      ),
+    );
+    if (await web.currentUrl() != url || isCurrent?.call() == false) {
+      return;
+    }
+    recordSchoolPageState(DiagnosticLog.instance, school, raw);
+  } catch (_) {
+    /* No original exceptions or page data enter the log. */
+  }
+}