annotate iwws.py @ 16:5a9b33dcdb2c default tip

Show how many samples as well as when the last sample was.
author Daniel O'Connor <darius@dons.net.au>
date Fri, 31 May 2013 13:36:26 +0930
parents a0213f0e707b
children
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1 #!/usr/bin/env python
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2
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3 #
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4 # Copyright 2011 Daniel O'Connor <darius@dons.net.au>
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5 #
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6 # Redistribution and use in source and binary forms, with or without modification, are
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7 # permitted provided that the following conditions are met:
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8 #
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9 # 1. Redistributions of source code must retain the above copyright notice, this list of
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10 # conditions and the following disclaimer.
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11 #
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12 # 2. Redistributions in binary form must reproduce the above copyright notice, this list
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13 # of conditions and the following disclaimer in the documentation and/or other materials
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14 # provided with the distribution.
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15 #
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16 # THIS SOFTWARE IS PROVIDED BY <COPYRIGHT HOLDER> ''AS IS'' AND ANY EXPRESS OR IMPLIED
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17 # WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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18 # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR
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19 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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20 # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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21 # SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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22 # ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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23 # NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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24 # ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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25 #
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26 # The views and conclusions contained in the software and documentation are those of the
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27 # authors and should not be interpreted as representing official policies, either expressed
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28 # or implied, of Daniel O'Connor.
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29 #
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30
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31 import sys
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32
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33 sys.path.append('..')
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34
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35 import calendar
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36 import datetime
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37 import pywws.DataStore
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38 import flask
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39 import logging
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40
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41 DEBUG = True
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42 DATA_DIR = '/data/weather'
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43
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44 # Create application object
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45 app = flask.Flask(__name__)
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46 app.debug_log_format = '%(asctime)s: %(message)s'
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47 app.config.from_object(__name__)
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48 app.config.from_envvar('IWWS_SETTINGS', silent=True)
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49
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50 if DEBUG:
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51 app.logger.setLevel(logging.DEBUG)
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52
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53 @app.route('/')
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54 def index():
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55 # Could be static really..
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56 return flask.render_template('index.html')
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57
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58 @app.route('/getdata.json')
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59 def getdata():
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60 app.logger.debug("Getting data")
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61 if 'duration' in flask.request.args:
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62 duration = float(flask.request.args['duration'])
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63 else:
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64 duration = 24 * 60 * 60
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65 duration = datetime.timedelta(seconds = duration)
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66 store = pywws.DataStore.data_store(DATA_DIR)
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67 now = datetime.datetime.now()
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68 then = now - duration
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69 data = store[then:now]
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70 app.logger.debug("done")
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71 r = {}
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72 for k in store.key_list:
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73 r[k] = []
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74
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75 # Raw data has absolute rain counts
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76 baserain = None
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77 for d in data:
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78 if baserain == None:
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79 baserain = d['rain']
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80 delta = d['rain'] - baserain
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81 # Sanity check
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82 if d['rain'] < baserain or delta > 100:
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83 delta = 0
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84 d['rain'] = delta
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85
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86 lastdata = d['idx']
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87 for k in d.keys():
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88 if k == 'idx':
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89 t = int(dt2epoch(d[k]))
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90 r[k].append(t)
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91 else:
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92 r[k].append(d[k])
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93 r['lastdata'] = dt2epoch(lastdata)
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94 return flask.jsonify(r)
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95
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96 def dt2epoch(dt):
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97 return calendar.timegm(dt.utctimetuple()[0:6]) + dt.microsecond / 1e6
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98
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99
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100 if __name__ == "__main__":
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101 app.run(host = '0.0.0.0', port = 5001, debug = DEBUG)