From dba0ef4a4e7fa112831e7ee3b4198f6c09fa7fc0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Anna=20Christina=20Na=C3=9F?= <christina@imzadi.de>
Date: Tue, 11 Jul 2017 14:29:20 +0200
Subject: [PATCH] Erste Fassung

---
 README.md  |  29 ++++++++++++
 fritz_temp | 127 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 156 insertions(+)
 create mode 100644 README.md
 create mode 100755 fritz_temp

diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
@@ -0,0 +1,29 @@
+# fritz_temperatur
+
+## Allgemein
+
+Dieses Script fragt die Temperatur eines an die FritzBox angeschlossenen Sensors ab.
+
+Getestet wurde es mit einer FritzBox 7390 mit FritzOS 6.83 und einem Comet DECT-Heizkörperregler.
+
+Das Script benötigt folgende Parameter:
+
+  -H  Hostname oder IP der FritzBox
+  -U  Benutzername zum Einloggen an der FritzBox (z.B. administrator)
+  -P  Das Paßwort des eben genannten Benutzers
+  -A  Die ID des Sensors.
+
+Die Sensor-ID kann man über die Web-Oberfläche der FritzBox abfragen:
+- Menü Heimnetz => Smart Home
+- Beim gewünschten Sensor auf "Bearbeiten" (Stift-Symbol) klicken
+- Die "Identifikationsnummer" ist die benötigte ID. Leerzeichen aus der ID entfernen.
+
+## Voraussetzungen
+
+Das Script ist in Python3 geschrieben und benötigt die folgenden Debian-Pakete:
+
+* python3
+* python3-urllib
+
+Getestet wurde mit Debian 8 (Jessie).
+
diff --git a/fritz_temp b/fritz_temp
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+++ b/fritz_temp
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+#!/usr/bin/python3
+# get target temperature from AVM/Comet Dect Heizkoerperregler (Heating Device)
+# need Fritz!OS 6.50+
+
+import getopt
+import re
+import requests
+import sys
+import xml.etree.ElementTree as etree
+import urllib.parse
+from hashlib import md5
+
+DEBUG=False
+
+def OK(text):
+  print("OK: " + text)
+  sys.exit()
+
+def Warning(text):
+  print("WARNING: " + text)
+  sys.exit()
+
+def Critical(text):
+  print("CRITICAL: " + text)
+  sys.exit()
+
+def OptionsError():
+  Critical("Error: not all required options are given.\n -H <hostname>\n -U <username>\n -P <password>\n -A <ID of device>")
+
+def debug(text):
+  if DEBUG == True:
+    print("DEBUG: " + text)
+
+def get_sid(loginurl, username, password):
+  if not username:
+    username=''
+
+  # get challenge string
+  response = requests.get(loginurl)
+
+  if response.status_code == 200:
+    tree = etree.fromstring(response.content)
+    challenge = tree.find("Challenge").text
+    sid = tree.find("SID").text
+    debug("challenge: " + challenge)
+    debug("sid: " + sid)
+  else:  
+    Critical("Error: GetSid failed")
+
+  if len(sid) > 0 and re.search("^0+$", sid) and challenge:
+    debug("Get new SID")
+    # sid is null, got challenge
+    sid = ""
+    # build password response
+    pwd = challenge + "-" + password
+    # UTF-16LE encoding as required
+    pwd = pwd.encode("UTF-16LE")
+    # md5hash on top
+    m = md5()
+    m.update(pwd)
+    # final answer string
+    challenge_response = challenge + "-" + m.hexdigest()
+    debug("challenge_response: " + challenge_response)
+    # send to box
+    url = loginurl + "?username=" + username + "&response=" + challenge_response
+    response = requests.get(url)
+    #print(response.content)
+    # check answer
+    tree = etree.fromstring(response.content)
+    sid2 = tree.find("SID").text
+    debug("SID: " + sid2)
+    if (len(sid2) > 0) and not re.search("^0+$", sid2):
+      # is not null, bingo!
+      return sid2
+  else:
+    # use existing sid if sid matches an hex string
+    if (len(sid) > 0) and re.search("^[0-9a-f]+$", sid):
+      return sid
+
+host = None
+username = None
+password = None
+ain = None
+
+try:
+  opts, args = getopt.gnu_getopt(sys.argv[1:], 'H:U:P:A:')
+except getopt.GetoptError as err:
+  OptionsError()
+
+for opt, arg in opts:
+  if opt == "-H":
+    host = arg
+  elif opt == "-U":
+    username = arg
+  elif opt == "-P":
+    password = arg
+  elif opt == "-A":
+    ain = arg
+
+if not host or not username or not password or not ain:
+  OptionsError()
+
+# build urls and login
+# - login_sid.lua for fritzos 5.50+
+loginurl = "http://" + host + "/login_sid.lua"
+ahaurl = "http://" + host + "/webservices/homeautoswitch.lua"
+sid = get_sid(loginurl, username, password);
+if not sid:
+  Critical("Error: Login invalid or failed")
+
+#query actual state
+rain = urllib.parse.quote(ain)
+url = ahaurl + '?ain=' + rain + '&sid=' + sid + '&switchcmd=gettemperature';
+
+http_response = requests.get(url)
+
+if http_response.status_code == 200:
+  # check answer
+  answer = http_response.content.decode().strip()
+  debug("Antwort: " + answer)
+  temperatur = float(answer) / 10
+  temp_str = "{0:<3.1f}".format(temperatur)
+  OK("Temperatur: " + temp_str + " | temp=" + temp_str)
+else:
+  Critical("Error: Query failed.")
+
+