Mercurial > personal > weather-server

annotate weather_server/server.py @ 39:b77c8e7d2742

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Use zoneinfo rather than pytz.
author Paul Fisher <paul@pfish.zone>
date Tue, 01 Apr 2025 15:54:21 -0400
parents 7def5611895b
children 1a69004d8e5a
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1 import datetime
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2 import hmac
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3 import pathlib
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4 import sys
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6 import bson
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7 import flask
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8
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9 from . import common
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10 from . import locations
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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.LocationFolder(pathlib.Path(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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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 locations = tuple(locs.locations().values())
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25 return flask.render_template(
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26 'index.html',
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27 locations=locations,
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28 )
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29
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30 @app.route('/_submit', methods=['POST'])
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31 def submit():
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32 req = flask.request
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33 reader = bson.decode_file_iter(
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34 req.stream, codec_options=common.BSON_OPTIONS)
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35 try:
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36 preamble = next(reader)
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37 loc_name = preamble['location']
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38 password = str(preamble['password'])
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39 loc = locs.get(loc_name)
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40 if not hmac.compare_digest(password, loc.password):
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41 flask.abort(400)
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42 entries = tuple(reader)
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43 except (KeyError, bson.InvalidBSON):
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44 flask.abort(400)
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45 now = datetime.datetime.now(tz=datetime.UTC)
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46 loc.record(entries, now)
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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: str):
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51 try:
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52 loc = locs.get(location)
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53 except KeyError:
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54 flask.abort(404)
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55 last_reading = loc.latest()
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56 if last_reading:
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57 tz = loc.timezone()
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58 date = tz.normalize(last_reading.sample_time.astimezone(tz))
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59 else:
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60 date = None
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61 now = datetime.datetime.now(tz=datetime.UTC)
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62 diff = (now - date) if date else None
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63 is_recent = diff and diff < datetime.timedelta(hours=12)
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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 date_format='%H:%M' if is_recent else '%Y-%m-%d %H:%M')
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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 = 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 = [r for r in loc.entries if start < r['sample_time']]
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87 resp = flask.Response()
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88 resp.content_type = 'application/json'
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89 resp.data = common.json_dumps({
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90 'timezone': loc.tz_name,
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91 'readings': readings,
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92 })
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93 return resp
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94
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95 return app
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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:])