feat(core): implement system health check endpoint

backend/config/settings.py

@@ -53,7 +53,7 @@ INSTALLED_APPS = [
 ]
 
 MIDDLEWARE = [
-    'corsheaders.middleware.CorsMiddleware',  # Place CORS middleware at the top
+    'corsheaders.middleware.CorsMiddleware',
     'django.middleware.security.SecurityMiddleware',
     'django.contrib.sessions.middleware.SessionMiddleware',
     'django.middleware.common.CommonMiddleware',

backend/config/urls.py

@@ -16,9 +16,11 @@ Including another URLconf
 """
 from django.contrib import admin
 from django.urls import path,include
+from core.views import HealthCheckView
 
 urlpatterns = [
     path('admin/', admin.site.urls),
+    path('api/health/', HealthCheckView.as_view(), name='health-check'),
     path('api/crawlers/', include('crawler.urls')),
     path('api/ads/', include('ads.urls')),
 ]

backend/core/views.py

@@ -1,3 +1,40 @@
-from django.shortcuts import render
+from django.db import connection
+from rest_framework.views import APIView
+from rest_framework.response import Response
+from rest_framework import status
+import os
+import redis
 
-# Create your views here.
+class HealthCheckView(APIView):
+    """
+    Endpoint to check system health (database connection and redis connection).
+    """
+    authentication_classes = []
+    permission_classes = []
+
+    def get(self, request):
+        db_status = "healthy"
+        redis_status = "healthy"
+        
+        # Check Database
+        try:
+            connection.ensure_connection()
+        except Exception as e:
+            db_status = f"unhealthy: {str(e)}"
+            
+        # Check Redis
+        try:
+            redis_url = os.getenv("REDIS_URL", "redis://localhost:6379/0")
+            r = redis.Redis.from_url(redis_url, socket_timeout=3)
+            r.ping()
+        except Exception as e:
+            redis_status = f"unhealthy: {str(e)}"
+            
+        is_healthy = db_status == "healthy" and redis_status == "healthy"
+        status_code = status.HTTP_200_OK if is_healthy else status.HTTP_503_SERVICE_UNAVAILABLE
+        
+        return Response({
+            "status": "healthy" if is_healthy else "unhealthy",
+            "database": db_status,
+            "redis": redis_status
+        }, status=status_code)