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annotate weather_server/server.py @ 5:368f732f13d0

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Actually make the server runnable.
author Paul Fisher <paul@pfish.zone>
date Sun, 29 Sep 2019 15:14:30 -0400
parents e7c8dcc5fc15
children d54155a199d8
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e7c8dcc5fc15 Make the weather server pip-installable and locally runnable.
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1 import hmac
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2 import sys
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4 import bson
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5 import flask
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6
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7 from . import common
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8 from . import locations
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9 from . import types
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10
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11
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12 def build_app(root_directory: str) -> flask.Flask:
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13 locs = locations.Locations(root_directory)
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14 app = flask.Flask(__name__)
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15
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16 @app.route('/favicon.ico')
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17 def favicon():
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18 return flask.send_file('static/favicon.ico')
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19
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20 @app.route('/')
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21 def home():
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22 return 'Weather server'
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23
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24 @app.route('/_submit', methods=['POST'])
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25 def submit():
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26 req = flask.request
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27 reader = bson.decode_file_iter(
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28 req.stream, codec_options=common.BSON_OPTIONS)
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29 try:
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30 preamble = next(reader)
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31 loc_name = preamble['location']
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32 password = str(preamble['password'])
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33 loc, logger = locs.get(loc_name)
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34 if not hmac.compare_digest(password, loc.password):
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35 flask.abort(400)
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36 entries = [
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37 types.Reading.from_now(
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38 sample_time=item['sample_time'],
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39 temp_c=item['temp_c'],
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40 rh_pct=item['rh_pct'],
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41 )
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42 for item in reader
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43 ]
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44 except (KeyError, bson.InvalidBSON):
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45 flask.abort(400)
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46 logger.write_rows(entries)
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47 return flask.jsonify({'status': 'OK'})
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48
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49 @app.route('/<location>')
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50 def show(location):
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51 try:
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52 loc, logger = locs.get(location)
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53 except KeyError:
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54 flask.abort(404)
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55 data = logger.data
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56 if data:
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57 last_reading = data[-1]
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58 tz = loc.timezone()
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59 date = tz.normalize(last_reading.sample_time.astimezone(tz))
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60 else:
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61 last_reading = None
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62 date = None
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63 return flask.render_template(
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64 'location.html',
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65 location=loc,
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66 last_reading=last_reading,
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67 date=date)
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68
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69 return app
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72 def main(argv):
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73 """Main function for a simple local demo."""
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74 app = build_app(argv[0])
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75 app.run(host='0.0.0.0')
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78 if __name__ == '__main__':
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79 main(sys.argv[1:])