Create app.py

app.py

@@ -0,0 +1,77 @@
+from flask import Flask, request, jsonify
+import os
+import ipaddress
+import hashlib
+import urllib.request
+
+app = Flask(__name__)
+
+# VPN IP list URL
+VPN_LIST_URL = "https://raw.githubusercontent.com/Dan-Duran/vpn-checker/main/known-vpn/vpn-list.txt"
+VPN_LIST_PATH = "known-vpn/vpn-list.txt"
+MANUAL_LIST_PATH = "known-vpn/vpn-manual.txt"
+
+# Ensure known-vpn directory exists
+os.makedirs("known-vpn", exist_ok=True)
+
+
+def download_file(url, local_path):
+    """Download the VPN IP list if updated."""
+    try:
+        response = urllib.request.urlopen(url)
+        new_content = response.read()
+
+        if os.path.exists(local_path):
+            with open(local_path, "rb") as local_file:
+                existing_content = local_file.read()
+                if hashlib.md5(existing_content).hexdigest() == hashlib.md5(new_content).hexdigest():
+                    print(f"No changes in {local_path}. Using the existing file.")
+                    return
+
+        with open(local_path, "wb") as local_file:
+            local_file.write(new_content)
+        print(f"Updated {local_path} with the latest version.")
+    except urllib.error.URLError as e:
+        print(f"Failed to download {url}: {e}")
+
+
+def load_ip_list(file_path):
+    """Load IP lists from a given file path."""
+    if os.path.exists(file_path):
+        with open(file_path, "r") as file:
+            return [line.strip() for line in file if line.strip()]
+    return []
+
+
+def is_ip_in_list(ip, ip_list):
+    """Check if an IP is in a VPN CIDR block."""
+    try:
+        ip_obj = ipaddress.IPv4Address(ip)
+        for cidr in ip_list:
+            if ip_obj in ipaddress.IPv4Network(cidr, strict=False):
+                return True
+    except ipaddress.AddressValueError:
+        return False
+    return False
+
+
+@app.route("/check-vpn", methods=["GET"])
+def check_vpn():
+    """Check if an IP is in the VPN list."""
+    user_ip = request.args.get("ip")
+    if not user_ip:
+        return jsonify({"error": "No IP address provided"}), 400
+
+    # Ensure latest VPN list is downloaded
+    download_file(VPN_LIST_URL, VPN_LIST_PATH)
+
+    vpn_list = load_ip_list(VPN_LIST_PATH)
+    manual_list = load_ip_list(MANUAL_LIST_PATH)
+
+    is_vpn = is_ip_in_list(user_ip, vpn_list) or is_ip_in_list(user_ip, manual_list)
+    
+    return jsonify({"ip": user_ip, "vpn_detected": is_vpn})
+
+
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=5000, debug=True)