Mercurial > personal > weather-server

annotate weather_server/server.py @ 21:beb42c835c52

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Make weather server handle arbitrary data: - Make logfile record arbitrary BSONs - Make server handlers OK with same - Make location type a normal class rather than attrs; have it handle its own logger. - Bump version number.
author Paul Fisher <paul@pfish.zone>
date Sat, 19 Oct 2019 18:40:48 -0400
parents 9a609bcf0809
children 88249e451566
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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 import pytz
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9
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10 from . import common
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11 from . import locations
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13
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14 def build_app(root_directory: str) -> flask.Flask:
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15 locs = locations.LocationFolder(pathlib.Path(root_directory))
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16 app = flask.Flask(__name__)
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17 app.config['SEND_FILE_MAX_AGE_DEFAULT'] = 0
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19 @app.route('/favicon.ico')
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20 def favicon():
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21 return flask.send_file('static/favicon.ico')
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22
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23 @app.route('/')
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24 def home():
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25 return 'Weather server'
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26
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27 @app.route('/_submit', methods=['POST'])
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28 def submit():
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29 req = flask.request
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30 reader = bson.decode_file_iter(
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31 req.stream, codec_options=common.BSON_OPTIONS)
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32 try:
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33 preamble = next(reader)
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34 loc_name = preamble['location']
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35 password = str(preamble['password'])
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36 loc = locs.get(loc_name)
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37 if not hmac.compare_digest(password, loc.password):
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38 flask.abort(400)
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39 entries = tuple(reader)
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40 except (KeyError, bson.InvalidBSON):
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41 flask.abort(400)
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42 now = datetime.datetime.now(tz=pytz.UTC)
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43 loc.record(entries, now)
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44 return flask.jsonify({'status': 'OK'})
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46 @app.route('/<location>')
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47 def show(location: str):
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48 try:
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49 loc = locs.get(location)
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50 except KeyError:
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51 flask.abort(404)
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52 last_reading = loc.latest()
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53 if last_reading:
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54 tz = loc.timezone()
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55 date = tz.normalize(last_reading.sample_time.astimezone(tz))
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56 else:
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57 date = None
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58 return flask.render_template(
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59 'location.html',
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60 location=loc,
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61 last_reading=last_reading,
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62 date=date)
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63
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64 @app.route('/<location>/recent')
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65 def recent(location: str):
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66 try:
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67 loc = locs.get(location)
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68 except KeyError:
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69 flask.abort(404)
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70 req = flask.request
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71
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72 try:
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73 seconds = int(req.args['seconds'])
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74 except (KeyError, ValueError):
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75 flask.abort(400)
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77 start = common.utc_now() - datetime.timedelta(seconds=seconds)
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78
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79 readings = [r for r in loc.entries if start < r['sample_time']]
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80 resp = flask.Response()
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81 resp.content_type = 'application/json'
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82 resp.data = common.json_dumps({
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83 'timezone': loc.tz_name,
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84 'readings': readings,
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85 })
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86 return resp
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87
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88 return app
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91 def main(argv):
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92 """Main function for a simple local demo."""
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93 app = build_app(argv[0])
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94 app.run(host='0.0.0.0')
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96
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97 if __name__ == '__main__':
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98 main(sys.argv[1:])