-
Notifications
You must be signed in to change notification settings - Fork 0
/
server.py
184 lines (151 loc) · 6.08 KB
/
server.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
#!python
# -*- coding: utf-8 -*-
"""Back-end server for socialsoundsproject.com"""
import logging
from os import environ as env
import soundcloud
from flask import Flask, render_template, request, jsonify, redirect, flash
from flask_redis import FlaskRedis
from models import LOCATIONS, Sound, UploadSoundForm
SERVER_URL = env['SERVER_URL']
REDIS_URL = env['REDIS_URL']
SOUNDCLOUD_CLIENT = None
SOUNDCLOUD_SOUNDS = None
logging.basicConfig(level=logging.DEBUG if env.get('DEBUG') else logging.INFO)
app = Flask(__name__)
app.secret_key = env['SECRET_KEY']
app.config['REDIS_URL'] = REDIS_URL
REDIS_CACHE = FlaskRedis(app)
def init_soundcloud(token_store):
"""
Returns SoundCloud client to use.
"""
logging.debug('Initialising SoundCloud client...')
return soundcloud.Client(client_id=env['SOUNDCLOUD_CLIENT_ID'],
client_secret=env['SOUNDCLOUD_CLIENT_SECRET'],
username=env['SOUNDCLOUD_ACCOUNT_USERNAME'],
password=env['SOUNDCLOUD_ACCOUNT_PASSWORD'])
def get_sounds(soundcloud_client):
"""
Get all geolocated Sounds in the authenticated user's stream.
"""
logging.info('Fetching sound data from authenticated user\'s SoundCloud stream.')
sounds = []
try:
page_size = 50
offset = 0
tracks = []
page = soundcloud_client.get('/me/tracks', limit=page_size)
while len(page) > 0:
tracks.extend(page)
offset += page_size
page = soundcloud_client.get('/me/tracks', limit=page_size, offset=offset)
logging.info('Got list of {0} sounds from SoundCloud.'.format(len(tracks)))
except Exception as e:
logging.error('Couldn\'t get SoundCloud sounds, try authenticating: {0}'.format(e))
return
for track in tracks:
sound = build_sound(track)
if sound:
sounds.append(sound)
logging.info('Built {0} geolocated sound objects from SoundCloud.'.format(len(sounds)))
return sounds
def build_sound(soundcloud_track):
"""
Build a Sound from the track object returned by the SoundCloud API,
or return None.
"""
try:
logging.debug(u'Building sound object: "{0}"'.format(soundcloud_track.obj.get('title')))
tags = soundcloud_track.obj.get('tag_list').split()
lats = {float(tag.split(u'=')[1]) for tag in tags if u'geo:lat=' in tag}
lons = {float(tag.split(u'=')[1]) for tag in tags if u'geo:lon=' in tag}
human_readable_location = soundcloud_track.obj.get('title')
if lats and lons:
sound = Sound(soundcloud_id=soundcloud_track.obj.get('id'),
latitude=lats.pop(),
longitude=lons.pop(),
human_readable_location=human_readable_location,
description=soundcloud_track.obj.get('description'))
logging.debug('Sound successfully processed: "{0}"'.format(sound))
return sound
except Exception as e:
logging.warning(
'Exception in processing sound "{title}": {exception}'.format(title=soundcloud_track.obj.get('title'),
exception=e)
)
return None
def check_sounds_refresh():
"""
Gets sounds again, if the <sounds:refresh> key is set.
"""
if REDIS_CACHE.get('sounds:refresh'):
logging.info('<sounds:refresh> key found, refreshing sounds...')
SOUNDCLOUD_SOUNDS = get_sounds(SOUNDCLOUD_CLIENT)
REDIS_CACHE.delete('soundcloud:new')
logging.debug('<sounds:refresh> key unset.')
@app.route('/')
def index():
"""
Serve the index page.
"""
if not SOUNDCLOUD_SOUNDS:
flash(
'No sounds found. Try authenticating to SoundCloud at secret URL http://{server-address}/${SOUNDCLOUD_AUTH_PATH}.',
'danger')
return render_template('index.html', locations=LOCATIONS)
@app.route('/upload', methods=['GET', 'POST'])
def upload_sound():
"""
Serve the 'upload sound' form for GET requests,
and process the results of a POST request, uploading the sound to SoundCloud.
"""
form = UploadSoundForm(request.form)
if request.method == 'POST' and form.validate():
logging.info('Upload form validated, posting to SoundCloud...')
track = SOUNDCLOUD_CLIENT.post('/tracks', track={
'title': u'{location}'.format(location=form.human_readable_location.data),
'description': form.description.data,
'asset_data': request.files[form.sound.name],
'tag_list': 'socialsoundsproject geo:lat={lat} geo:lon={lon}'.format(lat=form.latitude.data, lon=form.longitude.data),
'track_type': 'recording',
'license': 'cc-by',
'downloadable': 'true',
})
logging.debug('Sound uploaded, setting <sounds:refresh> key and sending user home.')
REDIS_CACHE.set('sounds:refresh', True)
return redirect('/')
return render_template('upload-sound.html', form=form)
@app.route('/sounds.json')
def all_sounds():
"""
Return JSON for all sounds.
"""
check_sounds_refresh()
return jsonify(sounds=SOUNDCLOUD_SOUNDS)
@app.route('/locations.json')
def locations():
"""
Return JSON for available projects.
"""
return jsonify(locations=LOCATIONS)
@app.route('/refresh')
def refresh_sounds():
"""
Manually refresh sounds.
"""
REDIS_CACHE.delete('soundcloud:new')
SOUNDCLOUD_CLIENT = init_soundcloud(REDIS_CACHE)
SOUNDCLOUD_SOUNDS = get_sounds(SOUNDCLOUD_CLIENT)
return redirect('/')
if __name__ == '__main__':
logging.info('Starting server...')
SOUNDCLOUD_CLIENT = init_soundcloud(REDIS_CACHE)
try:
SOUNDCLOUD_SOUNDS = get_sounds(SOUNDCLOUD_CLIENT)
except Exception as e:
logging.exception('Error getting Soundcloud sounds:')
# Bind to PORT if defined, otherwise default to 5000.
port = int(env.get('PORT', 5000))
logging.debug('Launching Flask app...')
app.run(host='0.0.0.0', port=port, debug=bool(env.get('DEBUG', False)))