Mercurial > personal > weather-server

annotate weather_server/server.py @ 11:52ef21607b31

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server: Create endpoint to get some recent readings.
author Paul Fisher <paul@pfish.zone>
date Sun, 06 Oct 2019 13:11:11 -0400
parents d54155a199d8
children 9a609bcf0809
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52ef21607b31 server: Create endpoint to get some recent readings.
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1 import datetime
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2 import hmac
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3 import sys
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5 import bson
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6 import flask
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7
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8 from . import common
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9 from . import locations
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10 from . import types
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11
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12
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13 def build_app(root_directory: str) -> flask.Flask:
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14 locs = locations.Locations(root_directory)
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15 app = flask.Flask(__name__)
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16 app.config['SEND_FILE_MAX_AGE_DEFAULT'] = 0
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17
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18 @app.route('/favicon.ico')
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19 def favicon():
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20 return flask.send_file('static/favicon.ico')
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21
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22 @app.route('/')
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23 def home():
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24 return 'Weather server'
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25
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26 @app.route('/_submit', methods=['POST'])
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27 def submit():
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28 req = flask.request
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29 reader = bson.decode_file_iter(
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30 req.stream, codec_options=common.BSON_OPTIONS)
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31 try:
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32 preamble = next(reader)
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33 loc_name = preamble['location']
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34 password = str(preamble['password'])
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35 loc, logger = locs.get(loc_name)
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36 if not hmac.compare_digest(password, loc.password):
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37 flask.abort(400)
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38 entries = [
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39 types.Reading.from_now(
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40 sample_time=item['sample_time'],
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41 temp_c=item['temp_c'],
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42 rh_pct=item['rh_pct'],
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43 )
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44 for item in reader
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45 ]
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46 except (KeyError, bson.InvalidBSON):
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47 flask.abort(400)
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48 logger.write_rows(entries)
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49 return flask.jsonify({'status': 'OK'})
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50
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51 @app.route('/<location>')
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52 def show(location: str):
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53 try:
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54 loc, logger = locs.get(location)
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55 except KeyError:
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56 flask.abort(404)
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57 data = logger.data
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58 if data:
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59 last_reading = data[-1]
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60 tz = loc.timezone()
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61 date = tz.normalize(last_reading.sample_time.astimezone(tz))
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62 else:
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63 last_reading = None
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64 date = None
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65 return flask.render_template(
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66 'location.html',
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67 location=loc,
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68 last_reading=last_reading,
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69 date=date)
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70
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71 @app.route('/<location>/recent')
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72 def recent(location: str):
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73 try:
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74 loc, logger = locs.get(location)
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75 except KeyError:
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76 flask.abort(404)
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77 req = flask.request
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78
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79 try:
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80 seconds = int(req.args['seconds'])
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81 except (KeyError, ValueError):
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82 flask.abort(400)
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83
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84 start = common.utc_now() - datetime.timedelta(seconds=seconds)
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85
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86 readings = [
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87 r.as_dict() for r in logger.data
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88 if start < r.sample_time
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89 ]
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90 resp = flask.Response()
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91 resp.content_type = 'application/json'
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92 resp.data = common.json_dumps(readings)
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93 return resp
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94
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95 return app
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96
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97
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98 def main(argv):
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99 """Main function for a simple local demo."""
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100 app = build_app(argv[0])
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101 app.run(host='0.0.0.0')
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102
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103
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104 if __name__ == '__main__':
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105 main(sys.argv[1:])