Enhance logging: implement rotating file handler and log tenant resolution details in context manager

Web/app.py

@@ -50,6 +50,7 @@ import socket
 import io
 import html
 import logging
+from logging.handlers import RotatingFileHandler
 import secrets
 import importlib
 try:
@@ -76,10 +77,19 @@ from data_protection import (
 BASE_DIR = os.path.dirname(os.path.abspath(__file__))
 import settings as cfg
 from settings import MongoClient
+from tenant import get_tenant_context
 
 
 app = Flask(__name__, static_folder='static')  # Correctly set static folder
-app.logger.setLevel(logging.WARNING)
+app.logger.setLevel(logging.INFO)
+if not os.path.exists(cfg.LOGS_FOLDER):
+    os.makedirs(cfg.LOGS_FOLDER, exist_ok=True)
+log_file_path = os.path.join(cfg.LOGS_FOLDER, 'application.log')
+file_handler = RotatingFileHandler(log_file_path, maxBytes=10 * 1024 * 1024, backupCount=5, encoding='utf-8')
+file_handler.setLevel(logging.INFO)
+file_handler.setFormatter(logging.Formatter('%(asctime)s %(levelname)s %(name)s %(message)s'))
+app.logger.handlers = []
+app.logger.addHandler(file_handler)
 app.secret_key = cfg.SECRET_KEY
 app.debug = cfg.DEBUG
 app.config['UPLOAD_FOLDER'] = cfg.UPLOAD_FOLDER
@@ -1092,6 +1102,15 @@ def inject_version():
                 client.close()
 
     current_module = _get_current_module(request.path)
+    current_tenant_db = MONGODB_DB
+    current_tenant_id = None
+    try:
+        ctx = get_tenant_context()
+        if ctx:
+            current_tenant_db = ctx.db_name or current_tenant_db
+            current_tenant_id = ctx.tenant_id
+    except Exception:
+        current_tenant_db = MONGODB_DB
 
     return {
         'APP_VERSION': APP_VERSION,
@@ -1104,6 +1123,8 @@ def inject_version():
         'is_admin': is_admin,
         'unread_notification_count': unread_notification_count,
         'current_permissions': current_permissions,
+        'current_tenant_db': current_tenant_db,
+        'current_tenant_id': current_tenant_id,
         'permission_action_options': PERMISSION_ACTION_OPTIONS,
         'permission_page_options': PERMISSION_PAGE_OPTIONS,
         'permission_presets': us.get_permission_preset_definitions(),
@@ -4036,13 +4057,19 @@ def login():
     if request.method == 'POST':
         username = request.form['username']
         password = request.form['password']
+        ctx = get_tenant_context()
+        current_tenant_id = ctx.tenant_id if ctx else None
+        current_tenant_db = ctx.db_name if ctx else cfg.MONGODB_DB
+        app.logger.info(f"Login attempt: username={username!r} tenant={current_tenant_id or 'default'} db={current_tenant_db} host={request.host} ip={request.remote_addr}")
         if not username or not password:
+            app.logger.warning(f"Login blocked: missing credentials tenant={current_tenant_id or 'default'} host={request.host} ip={request.remote_addr}")
             flash('Bitte alle Felder ausfüllen', 'error')
             return redirect(url_for('login'))
         
         user = us.check_nm_pwd(username, password)
 
         if user:
+            app.logger.info(f"Login success: username={username!r} tenant={current_tenant_id or 'default'} db={current_tenant_db} host={request.host} ip={request.remote_addr}")
             session['username'] = username
             is_admin_user = bool(user.get('Admin', False))
             session['admin'] = is_admin_user
@@ -4063,6 +4090,7 @@ def login():
             else:
                 return redirect(url_for('home'))
         else:
+            app.logger.warning(f"Login failed: username={username!r} tenant={current_tenant_id or 'default'} db={current_tenant_db} host={request.host} ip={request.remote_addr}")
             flash('Ungültige Anmeldedaten', 'error')
             get_flashed_messages()
     return render_template('login.html')

Web/templates/base.html

@@ -191,6 +191,17 @@
             white-space: nowrap;
             flex-shrink: 0;
         }
+
+        .navbar-text.tenant-badge {
+            font-size: 0.82rem;
+            color: rgba(255,255,255,0.9);
+            background: rgba(255,255,255,0.12);
+            border: 1px solid rgba(255,255,255,0.18);
+            padding: 0.25rem 0.55rem;
+            border-radius: 999px;
+            white-space: nowrap;
+            margin-right: 0.75rem;
+        }
         
         .navbar-brand::before {
             content: attr(data-icon);
@@ -1113,7 +1124,10 @@
                                 <button class="function-search-btn" type="submit">Los</button>
                             </form>
                         </div>
-                        <span class="navbar-text text-light me-3">{{ session['username'] }}</span>
+                        {% if current_tenant_db %}
+                        <span class="navbar-text tenant-badge" title="Aktive Tenant-Datenbank">{{ current_tenant_db }}</span>
+                    {% endif %}
+                    <span class="navbar-text text-light me-3">{{ session['username'] }}</span>
                         <div class="dropdown me-2 user-menu-wrap">
                             <button class="btn btn-secondary dropdown-toggle user-menu-btn" type="button" id="invUserMenuDropdown" data-bs-toggle="dropdown" aria-expanded="false" data-notification-button="true">
                                 👤

Web/templates/login.html

@@ -14,6 +14,15 @@
 <div class="row justify-content-center">
     <div class="col-md-6">
         <h2 class="text-center">Login</h2>
+        {% if current_tenant_id or current_tenant_db %}
+        <div class="alert alert-info text-center small mb-4" role="alert">
+            {% if current_tenant_id %}
+                Aktiver Tenant: <strong>{{ current_tenant_id }}</strong> &middot; Datenbank: <strong>{{ current_tenant_db }}</strong>
+            {% else %}
+                Aktive Datenbank: <strong>{{ current_tenant_db }}</strong>
+            {% endif %}
+        </div>
+        {% endif %}
         <form method="POST" action="{{ url_for('login') }}">
             <div class="mb-3">
                 <label for="username" class="form-label">Username</label>

Web/tenant.py

@@ -128,7 +128,9 @@ class TenantContext:
             if tenant_from_port:
                 self.tenant_id = tenant_from_port
                 self.config = get_tenant_config(tenant_from_port)
+                logger.info(f"Tenant resolution by port: host={host} port={port} tenant={tenant_from_port}")
                 return self._get_db_name(tenant_from_port)
+            logger.info(f"Tenant port not mapped: host={host} port={port}")
 
         # Priority 3: Subdomain extraction
         parts = host.split('.')
@@ -144,7 +146,9 @@ class TenantContext:
                 self.subdomain = potential_subdomain
                 self.tenant_id = potential_subdomain
                 self.config = get_tenant_config(potential_subdomain)
+                logger.info(f"Tenant resolution by subdomain: host={host} tenant={potential_subdomain}")
                 return self._get_db_name(potential_subdomain)
+            logger.info(f"Tenant subdomain ignored: {potential_subdomain}")
 
         # Fallback to default tenant if no tenant identifier found.
         # If no explicit 'default' tenant config exists, use configured MongoDB DB.