feat: enhance IP retrieval with caching

- Implemented caching for external IP retrieval in the misc function to reduce unnecessary requests and improve performance.
- Added error handling and logging for external IP retrieval failures.

web/reNgine/context_processors.py

@@ -1,11 +1,29 @@
 from . import settings
 import requests
+from django.core.cache import cache
+import logging
+
+logger = logging.getLogger(__name__)
 
 def version(request):
     return {"RENGINE_CURRENT_VERSION": settings.RENGINE_CURRENT_VERSION}
 
 def misc(request):
-    externalIp = requests.get('https://checkip.amazonaws.com').text.strip()
+    # Attempt to retrieve the external IP address from the cache
+    external_ip = cache.get('external_ip')
+
+    if external_ip is None:
+        try:
+            # If the IP address is not in the cache, make the request
+            external_ip = requests.get('https://checkip.amazonaws.com').text.strip()
+            # Cache the IP address for 1 hour (3600 seconds)
+            cache.set('external_ip', external_ip, timeout=3600)
+        except requests.RequestException as e:
+            # Handle the exception if the request fails
+            external_ip = 'Unable to retrieve IP'  # Default value in case of error
+            # You can also log the error if necessary
+            logger.error(f"Error retrieving external IP: {e}")
+
     return {
-        'external_ip': externalIp
+        'external_ip': external_ip
     }