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
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
# Copyright (C) 2013 Aleksey Lim
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import logging
import mimetypes
from os.path import split
from sugar_network import static, db
from sugar_network.toolkit.router import route, fallbackroute, Blob, ACL
from sugar_network.toolkit import coroutine
_logger = logging.getLogger('model.routes')
class VolumeRoutes(db.Routes):
@route('GET', ['context', None], cmd='feed',
mime_type='application/json')
def feed(self, request, distro):
context = self.volume['context'].get(request.guid)
releases = self.volume['release']
versions = []
impls, __ = releases.find(context=context.guid,
not_layer='deleted', **request)
for impl in impls:
version = impl.properties([
'guid', 'ctime', 'layer', 'author', 'tags',
'version', 'stability', 'license', 'notes',
])
if context['dependencies']:
requires = version.setdefault('requires', {})
for i in context['dependencies']:
requires.setdefault(i, {})
version['data'] = data = impl.meta('data')
for key in ('mtime', 'seqno', 'blob'):
if key in data:
del data[key]
versions.append(version)
result = {'releases': versions}
if distro:
aliases = context['aliases'].get(distro)
if aliases and 'binary' in aliases:
result['packages'] = aliases['binary']
return result
class FrontRoutes(object):
def __init__(self):
self._pooler = _Pooler()
@route('GET', mime_type='text/html')
def hello(self):
return _HELLO_HTML
@route('OPTIONS')
def options(self, request, response):
if request.environ['HTTP_ORIGIN']:
response['Access-Control-Allow-Methods'] = \
request.environ['HTTP_ACCESS_CONTROL_REQUEST_METHOD']
response['Access-Control-Allow-Headers'] = \
request.environ['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']
else:
response['Allow'] = 'GET, HEAD, POST, PUT, DELETE'
response.content_length = 0
@route('GET', cmd='subscribe', mime_type='text/event-stream')
def subscribe(self, request=None, response=None, ping=False, **condition):
"""Subscribe to Server-Sent Events."""
if request is not None and not condition:
condition = request
if response is not None:
response.content_type = 'text/event-stream'
response['Cache-Control'] = 'no-cache'
return self._pull_events(request, ping, condition)
@route('POST', cmd='broadcast',
mime_type='application/json', acl=ACL.LOCAL)
def broadcast(self, event=None, request=None):
if request is not None:
event = request.content
_logger.debug('Broadcast event: %r', event)
self._pooler.notify_all(event)
@fallbackroute('GET', ['static'])
def get_static(self, request):
path = static.path(*request.path[1:])
if not mimetypes.inited:
mimetypes.init()
mime_type = mimetypes.types_map.get('.' + path.rsplit('.', 1)[-1])
return Blob({
'blob': path,
'filename': split(path)[-1],
'mime_type': mime_type,
})
@route('GET', ['robots.txt'], mime_type='text/plain')
def robots(self, request, response):
return 'User-agent: *\nDisallow: /\n'
@route('GET', ['favicon.ico'])
def favicon(self, request, response):
return Blob({
'blob': static.path('favicon.ico'),
'mime_type': 'image/x-icon',
})
def _pull_events(self, request, ping, condition):
_logger.debug('Start subscription, total=%s', self._pooler.waiters + 1)
if ping:
# XXX The whole commands' kwargs handling should be redesigned
if 'ping' in condition:
condition.pop('ping')
# If non-greenlet application needs only to initiate
# a subscription and do not stuck in waiting for the first event,
# it should pass `ping` argument to return fake event to unblock
# `GET /?cmd=subscribe` call.
yield {'event': 'pong'}
rfile = None
if request is not None:
rfile = request.content_stream
if rfile is not None:
coroutine.spawn(self._waiter_for_closing, rfile)
while True:
event = self._pooler.wait()
if not isinstance(event, dict):
if event is rfile:
break
else:
continue
for key, value in condition.items():
if value.startswith('!'):
if event.get(key) == value[1:]:
break
elif event.get(key) != value:
break
else:
yield event
_logger.debug('Stop subscription, total=%s', self._pooler.waiters)
def _waiter_for_closing(self, rfile):
try:
coroutine.select([rfile.fileno()], [], [])
finally:
self._pooler.notify_all(rfile)
class _Pooler(object):
"""One-producer-to-many-consumers events delivery."""
def __init__(self):
self._value = None
self._waiters = 0
self._ready = coroutine.Event()
self._open = coroutine.Event()
self._open.set()
@property
def waiters(self):
return self._waiters
def wait(self):
self._open.wait()
self._waiters += 1
try:
self._ready.wait()
finally:
self._waiters -= 1
if self._waiters == 0:
self._ready.clear()
self._open.set()
return self._value
def notify_all(self, value=None):
self._open.wait()
if not self._waiters:
return
self._open.clear()
self._value = value
self._ready.set()
_HELLO_HTML = """\
<h2>Welcome to Sugar Network API!</h2>
Visit the <a href="http://wiki.sugarlabs.org/go/Sugar_Network/API">
Sugar Labs Wiki</a> to learn how it can be used.
"""
|
