Checks the paper status of campus printers by IP

fetch_printer.py

import json
import requests
import re
from sys import argv

status = {"0": "Empty", "1": "Low", "2": "Normal", "3": "Full"}
data = {
    "uri":"/rps/",
    "userID":"",
    "password":""
}

def get_tray_levels(ip_address):

    home_url = ip_address if ip_address.startswith("http://") else "http://" + ip_address

    form = requests.get(home_url).text
    action_url = re.findall(r"URL=(http(?:s?)\:\/\/.+)\/rps\/", form)[0]

    url = action_url + "/login"
    resp = requests.post(url, data=data, verify=False).text
    trays_raw = re.findall(r"var cstInfo \= (\{.+\});\n", resp)[0]

    trays = json.loads(trays_raw)

    for tray in sorted(trays.values(), key=lambda t: t["cstName"]):
        print(tray["cstName"] + ": " + status.get(tray["remainPapVol"], "Unknown status"))

if __name__ == "__main__":
    if len(argv) < 2:
        exit("No IP provided.")
    get_tray_levels(argv[1])