[python] Draft of web backend

web/conf/.htaccess

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+Deny from all

web/conf/conf.custom.ini

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+[clima]
+    mode         = 
+    temperature  =
+    fan          = 

web/conf/conf.ini

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+[clima]
+    mode         = 
+    temperature  =
+    fan          = 

web/main.py

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+#!/usr/bin/env python3
+# -*- coding: UTF-8 -*-
+import xml.etree.ElementTree as ET
+import sys
+import cgitb, cgi
+import datetime as dt
+import locale
+import json
+
+import configparser
+
+# Read configuration files (latest files in list override previous settings)
+cfg = configparser.ConfigParser()
+
+#locale.setlocale(locale.LC_TIME, 'it_IT')
+remoteOpts = ('mode', 'temperature', 'fan')
+
+# Start CGI handling for webserver
+cgitb.enable()
+inputvars = cgi.FieldStorage()
+
+# Default format is json, keep HTML for light debug
+#if 'format' in inputvars and inputvars['format'].value == 'html':
+#    format = 'html'
+#    print('Content-Type: text/html; charset=utf-8')
+#else:
+format = 'json'
+print('Content-Type: text/json; charset=utf-8')
+
+print()
+### End of HTTP headers:  it is now safe to output things
+##########################################################
+
+def error(msg):
+  print(json.dumps({'ret' : msg}, indent=4))
+  exit(-1)
+
+def getClimaOpts():
+  cfg.read(['conf/conf.ini', 'conf/conf.custom.ini'])
+  if 'clima' in cfg:
+    return dict(cfg['clima'].items())
+  else:
+    return {'ret': 'err'}
+
+def setClimaOpts(opt):
+  cfg['clima'] = opt
+  with open('conf/conf.custom.ini', 'w') as configfile:
+    cfg.write(configfile)
+
+
+if 'cmd' in inputvars:
+  cmd = inputvars['cmd'].value
+
+  # Send a command to clima through DG interface
+  if   cmd == 'setClima':
+    if not (set(remoteOpts).issubset(inputvars)):
+      error('Invalid cmd options')
+    else:
+      # parse and send
+      opt = { key:inputvars[key].value for key in inputvars if key in remoteOpts }
+
+      # Call DG and send this
+
+      print(json.dumps({'ret' : 'OK'}, indent=4))
+
+
+  # Get default clima options from cfg file
+  elif cmd == 'getClima':
+    # Parse cfg file and return json
+    opt = getClimaOpts()
+    print(json.dumps(opt, indent=4))
+
+  # Edit cfg file with new clima options
+  elif cmd == 'putClima':
+    if not (set(remoteOpts).issubset(inputvars)):
+      error('Invalid cmd options')
+    else:
+      # parse and send
+      opt = { key:inputvars[key].value for key in inputvars if key in remoteOpts }
+
+      # Edit cfg file
+      setClimaOpts(opt)
+
+      print(json.dumps({'ret' : 'OK'}, indent=4))
+
+  # Get ambient informations (i.e. temperature)
+  elif cmd == 'getAmbient':
+    print(json.dumps({'ret' : 'OK'}, indent=4))
+
+  else:
+    error('Invalid cmd code %s' % cmd)
+else:
+  error('Invalid cmd')