annotate py/uploader.py @ 147:ab1e7bf77d69

requirements added
author Matt Johnston <matt@ucc.asn.au>
date Sun, 09 Dec 2012 20:07:15 +0800
parents 3b4277aaed3c
children 256505f98c4d
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1 import config
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2
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3 import json
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4 import hmac
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5 import zlib
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6
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7 class Uploader(gevent.Greenlet):
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8 def __init__(self, server):
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9 gevent.Greenlet.__init__(self)
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10 self.server = server
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11
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12 def _run(self):
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13 while True:
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14 self.do()
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15 gevent.sleep(config.UPLOAD_SLEEP)
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16
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17 def get_tosend(self, readings):
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18 tosend = {}
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19
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20 tosend['fridge_on'] = self.server.fridge.is_on()
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21
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22 tosend['now'] = self.server.now()
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23 tosend['readings'] = readings
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24
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25 tosend['wort_name'] = self.server.wort_name
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26 tosend['fridge_name'] = self.server.wort_fridge_name
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27
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28 tosend.update(dict(self.server.params))
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29
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30 tosend['start_time'] = self.server.start_time
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31 tosend['uptime'] = utils.uptime()
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32
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33 return tosend
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34
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35 def send(self, tosend):
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36 js = json.dumps(tosend)
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37 js_enc = binascii.b2a_base64(zlib.compress(js))
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38 mac = hmac.new(config.HMAC_KEY, js_enc).hexdigest()
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39 url_data = urllib.urlencode( {'data': js_enc, 'hmac': mac} )
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40 con = urllib2.urlopen(config.UPDATE_URL, url_data)
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41 result = con.read(100)
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42 if result != 'OK':
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43 raise Exception("Server returned %s" % result)
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44
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45 def do():
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46 readings = self.server.take_readings()
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47 try:
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48 tosend = self.get_tosend(readings)
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49 readings = None
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50 self.send(tosend)
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51 except Exception, e:
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52 EX"Error in uploader: %s" % str(e))
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53 finally:
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54 if readings is not None:
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55 self.server.pushfront(readings)