Enable 'service-down' mode by creating a flag file

lib/wttr_srv.py

@@ -375,6 +375,34 @@ def wttr(location, request):
     parsed_query = parse_request(location, request, query, fast_mode=True)
     response = _response(parsed_query, query, fast_mode=True)
 
+    ############################
+    # Service Down.
+
+    if os.path.exists("/tmp/service-down"):
+        # parsed_query = parse_request(location, request, query)
+        if parsed_query["html_output"]:
+            response = MALFORMED_RESPONSE_HTML_PAGE
+            http_code = 500  # Internal Server Error
+        else:
+            response = get_message("CAPACITY_LIMIT_REACHED", parsed_query["lang"])
+            http_code = 503  # Service Unavailable
+
+        # if exception is occured, we return not a png file but text
+        if "png_filename" in parsed_query:
+            del parsed_query["png_filename"]
+
+        return (
+            _wrap_response(
+                response,
+                parsed_query["html_output"],
+                parsed_query["json_output"],
+                png_filename=parsed_query.get("png_filename"),
+            ),
+            http_code,
+        )
+
+    ############################
+
     http_code = 200
     try:
         if not response: