Mercurial > personal > weather-server

annotate weather_server/server.py @ 9:f1ea183d28ba

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Give a 404 rather than a 500 on missing locations.
author Paul Fisher <paul@pfish.zone>
date Sun, 29 Sep 2019 20:34:38 -0400
parents d54155a199d8
children 52ef21607b31
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 app.config['SEND_FILE_MAX_AGE_DEFAULT'] = 0
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16
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17 @app.route('/favicon.ico')
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18 def favicon():
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19 return flask.send_file('static/favicon.ico')
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20
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21 @app.route('/')
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22 def home():
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23 return 'Weather server'
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24
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25 @app.route('/_submit', methods=['POST'])
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26 def submit():
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27 req = flask.request
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28 reader = bson.decode_file_iter(
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29 req.stream, codec_options=common.BSON_OPTIONS)
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30 try:
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31 preamble = next(reader)
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32 loc_name = preamble['location']
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33 password = str(preamble['password'])
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34 loc, logger = locs.get(loc_name)
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35 if not hmac.compare_digest(password, loc.password):
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36 flask.abort(400)
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37 entries = [
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38 types.Reading.from_now(
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39 sample_time=item['sample_time'],
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40 temp_c=item['temp_c'],
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41 rh_pct=item['rh_pct'],
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42 )
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43 for item in reader
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44 ]
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45 except (KeyError, bson.InvalidBSON):
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46 flask.abort(400)
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47 logger.write_rows(entries)
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48 return flask.jsonify({'status': 'OK'})
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49
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50 @app.route('/<location>')
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51 def show(location):
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52 try:
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53 loc, logger = locs.get(location)
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54 except KeyError:
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55 flask.abort(404)
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56 data = logger.data
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57 if data:
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58 last_reading = data[-1]
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59 tz = loc.timezone()
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60 date = tz.normalize(last_reading.sample_time.astimezone(tz))
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61 else:
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62 last_reading = None
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63 date = None
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64 return flask.render_template(
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65 'location.html',
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66 location=loc,
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67 last_reading=last_reading,
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68 date=date)
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69
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70 return app
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73 def main(argv):
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74 """Main function for a simple local demo."""
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75 app = build_app(argv[0])
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76 app.run(host='0.0.0.0')
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79 if __name__ == '__main__':
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80 main(sys.argv[1:])