Add script

LICENSE

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+Copyright (c) 2023 Maxim Sklenář
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

cdwifi.py

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+#!/usr/bin/env python3
+"""Script to login to CDWiFi captive portal."""
+import sys
+import requests
+from bs4 import BeautifulSoup
+
+
+def main():
+    """Main function."""
+    test_req = requests.get("http://www.example.com",
+                            timeout=5, allow_redirects=False)
+    if test_req.status_code == 302 and "Location" in test_req.headers:
+        # Extract the URL of the captive portal from the Location header
+        captive_portal_url = test_req.headers["Location"]
+    else:
+        internet = requests.get("http://www.example.com", timeout=5)
+        if internet.status_code == 200:
+            print("Already connected to the internet", file=sys.stderr)
+            sys.exit(0)
+
+        print("Couldn't get CAPNET address", file=sys.stderr)
+        sys.exit(1)
+    capnet = requests.get(captive_portal_url, timeout=5)
+
+    soup = BeautifulSoup(capnet.text, "html.parser")
+    # Get input[name=secret]
+    secret = soup.find("input", {"name": "secret"})
+    # If secret is None, exit
+    if secret is None:
+        print("Failed to get secret", file=sys.stderr)
+        sys.exit(1)
+
+    value = secret["value"]
+
+    if value is None:
+        print("Unknown secret format", file=sys.stderr)
+        sys.exit(1)
+
+    # Create x-www-urlencoded payload
+    payload = {"secret": value, "eula": "on"}
+    # Send POST request
+    capnet = requests.post(
+        captive_portal_url + "/accept",
+        headers={"Content-Type": "application/x-www-form-urlencoded"},
+        data=payload,
+        timeout=5,
+    )
+
+    if capnet.status_code != 200:
+        print("Failed to login to CAPNET", file=sys.stderr)
+        sys.exit(1)
+
+    print("Logged in to CAPNET")
+
+
+if __name__ == "__main__":
+    main()