1 files changed, 40 insertions, 1 deletions
diff --git a/src/backend/checkenv.py b/src/backend/checkenv.py
index 4f540e9..8030bc9 100644
--- a/src/backend/checkenv.py
+++ b/src/backend/checkenv.py
@@ -1,18 +1,57 @@
 #!/usr/bin/python3
 
 import os
+import re
 import subprocess
 import sisyphus.getenv
+import sisyphus.getfs
 import sisyphus.getnews
 import urllib.request
+from urllib.error import HTTPError
+
+
+NETWORK_CHECK_URL_FILE = os.path.join(
+    sisyphus.getfs.s_cfg_dir, "network_check_url.conf")
+
+
+def is_valid_url(url):
+    regex = re.compile(
+        r'^(http|https)://'
+        r'([a-zA-Z0-9.-]+)'
+        r'(\.[a-zA-Z]{2,})'
+        r'(:\d+)?'
+        r'(/.*)?$'
+    )
+    return re.match(regex, url) is not None
 
 
 def connectivity():
     is_online = int()
+    default_url = "https://redcorelinux.org"
+
+    try:
+        with open(NETWORK_CHECK_URL_FILE, "r") as file:
+            url = file.readline().strip()
+
+        if not url:
+            url = default_url
+
+        elif not is_valid_url(url):
+            url = default_url
+
+    except FileNotFoundError:
+        url = default_url
 
     try:
-        urllib.request.urlopen("http://www.google.com", timeout=5)
+        urllib.request.urlopen(url, timeout=5)
         is_online = int(1)
+
+    except HTTPError as e:
+        if e.code == 429:
+            is_online = int(1)  # ignore rate limiting errors
+        else:
+            is_online = int(1)  # ignore all other http errors
+
     except urllib.error.URLError:
         is_online = int(0)