Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
ZeroServices
Search
Boris Feld
October 27, 2013
Programming
0
110
ZeroServices
Présentation de ZeroServices, une libraire pour faire des services réseaux en P2P.
Boris Feld
October 27, 2013
Tweet
Share
More Decks by Boris Feld
See All by Boris Feld
BALTO, ONE TEST OUTPUT FORMAT TO UNITE THEM ALL
lothiraldan
0
52
Une révolution dans le monde des tests
lothiraldan
0
250
Mercurial changeset Evolution
lothiraldan
0
180
Python Unicode and Bytes Demystified
lothiraldan
0
230
Django 101
lothiraldan
0
250
Saltpad: A saltstack Web GUI
lothiraldan
5
27k
Mock considered harmful
lothiraldan
1
710
from Sync to Async Python, a AsyncIO migration
lothiraldan
2
740
Microservices késako
lothiraldan
0
130
Other Decks in Programming
See All in Programming
データの民主化を支える、透明性のあるデータ利活用への挑戦 2025-06-25 Database Engineering Meetup#7
y_ken
0
340
Kotlin エンジニアへ送る:Swift 案件に参加させられる日に備えて~似てるけど色々違う Swift の仕様 / from Kotlin to Swift
lovee
1
260
PostgreSQLのRow Level SecurityをPHPのORMで扱う Eloquent vs Doctrine #phpcon #track2
77web
2
510
技術同人誌をMCP Serverにしてみた
74th
1
630
イベントストーミング図からコードへの変換手順 / Procedure for Converting Event Storming Diagrams to Code
nrslib
2
640
Discover Metal 4
rei315
2
120
PHPでWebSocketサーバーを実装しよう2025
kubotak
0
270
Claude Code + Container Use と Cursor で作る ローカル並列開発環境のススメ / ccc local dev
kaelaela
0
550
Composerが「依存解決」のためにどんな工夫をしているか #phpcon
o0h
PRO
1
250
新メンバーも今日から大活躍!SREが支えるスケールし続ける組織のオンボーディング
honmarkhunt
4
6.1k
LINEヤフー データグループ紹介
lycorp_recruit_jp
1
2.3k
猫と暮らす Google Nest Cam生活🐈 / WebRTC with Google Nest Cam
yutailang0119
0
110
Featured
See All Featured
For a Future-Friendly Web
brad_frost
179
9.8k
Designing Dashboards & Data Visualisations in Web Apps
destraynor
231
53k
Art, The Web, and Tiny UX
lynnandtonic
299
21k
The Art of Delivering Value - GDevCon NA Keynote
reverentgeek
15
1.5k
Done Done
chrislema
184
16k
Measuring & Analyzing Core Web Vitals
bluesmoon
7
500
The World Runs on Bad Software
bkeepers
PRO
69
11k
Dealing with People You Can't Stand - Big Design 2015
cassininazir
367
26k
KATA
mclloyd
30
14k
Git: the NoSQL Database
bkeepers
PRO
430
65k
Practical Tips for Bootstrapping Information Extraction Pipelines
honnibal
PRO
20
1.3k
Intergalactic Javascript Robots from Outer Space
tanoku
271
27k
Transcript
ZeroServices FELD Boris - PyconFR 2013 lothiraldan@gmail.com
/me • FELD Boris - DevTools • Tornado FTW •
@lothiraldan un peu partout sur le web • https://github.com/Lothiraldan/ ZeroServices
ZeroService • Librairie pour écrire des Services P2P • Python2.x
• Very Alpha
ZeroServices Pourquoi ?
Besoins • AutoDiscovery • Multicast / Unicast • Découverte des
pertes de pairs
Network is difficult
Peer To Peer is difficult
Choix technologiques
Pourquoi ØMQ ? • Sockets BSD trop bas niveau. •
RabbitMQ... NOPE. • ØMQ FTW. • L’ioloop est packagée dans PyZMQ.
AutoDiscovery UDP Multicast
Communication Unicast / Multicast ZeroMQ
Découverte des pertes Heartbeating (to do)
None
Retour d’expérience
L’asynchrone c’est difficile
Tester de l’asynchrone c’est douloureux
Quelques trucs • Isoler au maximum la partie asynchrone •
La tester avec des mocks • Mocker la partie asynchrone
Exemple class ZeroMQMediumTestCase(unittest.TestCase): def setUp(self): self.service = ServiceMock() self.ioloop =
IOLoop.instance() self.medium = ZeroMQMedium(self.service, ioloop=self.ioloop) def testRegister(self): self.medium.register() self.ioloop.start() self.assertEqual(self.service.on_registration_message.call_count, 1)
Exemple II class BaseServiceTestCase(unittest.TestCase): def setUp(self): self.medium = TestMedium() self.service
= BaseService(self.medium) def testOnRegistration(self): node_info = {'name': 'Service 1'} self.service.on_registration_message(node_info) self.assertEqual(self.medium.send_registration_answer.call_count, 1)
Les topologies réseaux est hétérogène
Vous allez toujours avoir des topologies de réseau tordues
Au choix • Firewall • NAT • VPN • DMZ
• Pas d’UDP Multicast
None
Traitez les quand ils arrivent
Pas de solutions magiques en P2P
Des techniques • Utiliser le port 443 ou 80 •
UDP Hole Punching • Encapsuler le traffic dans HTTP
Une solution ? • Avoir un pair central • Qui
forward le traffic
ZeroService is not perfect • Pas d’ack pour les messages
• Pas d’heartbeat • Une socket par message sortant • UDP Multicast / ZeroConf • Marche en LAN. Pas en WAN.
Exemple
Le service de chat class ChatService(BaseService): def __init__(self, username): self.username
= username super(ChatService, self).__init__(ZeroMQMedium(self, port_random=True)) def service_info(self): return {'name': self.username}
Le service de chat class ChatService(BaseService): def on_event(self, message_type, message):
"""Called when a multicast message is received """ msg = {'type': message_type} msg.update(message) self.send_to_all_clients(json.dumps(msg)) def on_message(self, message_type, **kwargs): """Called when an unicast message is received """ msg = {'type': message_type} msg.update(kwargs) self.send_to_all_clients(json.dumps(msg)) def on_new_node(self, node_info): """Called when a new peer joins """ msg = json.dumps({'type': 'user_join', 'id': node_info['node_id'], 'name': node_info['name']}) self.send_to_all_clients(msg) def on_node_close(self, node_info): """Called when a peer leaves """ msg = json.dumps({'type': 'user_leave', 'id': node_info['node_id'], 'name': node_info['name']}) self.send_to_all_clients(msg)
La partie Tornado class MainHandler(web.RequestHandler): def get(self): return self.render('chat.html', port=int(sys.argv[2]),
name=sys.argv[1])
La partie Tornado clients = [] class WebSocketHandler(websocket.WebSocketHandler): def open(self):
clients.append(self) for node_id, node in s.nodes_directory.items(): msg = json.dumps({'type': 'user_join', 'id': node_id, 'name': node['name']}) self.write_message(msg) def on_close(self): clients.remove(self) def on_message(self, message): message = json.loads(message) if message['type'] == 'message': msg = {'username': sys.argv[1], 'message': message['data']['message']} s.publish(str(message['type']), msg) elif message['type'] == 'direct_message': msg = {'from': sys.argv[1], 'message': message['data']['message']} s.send(message['data']['to'], msg, msg_type=str(message['type']))
Chat.py urls = [ (r"/", MainHandler), (r"/websocket", WebSocketHandler), (r"/static/(.*)", web.StaticFileHandler,
{"path": "."})] if __name__ == '__main__': application = web.Application(urls, debug=True) application.listen(int(sys.argv[2])) try: ioloop.IOLoop.instance().add_timeout(time() + 1, s.medium.register) ioloop.IOLoop.instance().start() except KeyboardInterrupt: s.close() for client in clients: client.close()
La demo chat • 69 lignes de python • Pas
de serveur central • API qui se veut simple
DEMO !
Questions ?