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
flask with server-sent events
Search
cppgohan
January 13, 2013
Technology
4
1.8k
flask with server-sent events
sztechparty
cppgohan
January 13, 2013
Tweet
Share
More Decks by cppgohan
See All by cppgohan
ReactNative for Android first look
gohan
0
54
Introduction to Bittorrent sync
gohan
0
91
Twitter bootstrap 小试
gohan
0
93
Introduction To Hubot
gohan
1
220
Other Decks in Technology
See All in Technology
LINE Developersプロダクト(LIFF/LINE Login)におけるフロントエンド開発
lycorptech_jp
PRO
0
120
統計データで2024年の クラウド・インフラ動向を眺める
ysknsid25
2
850
watsonx.ai Dojo #5 ファインチューニングとInstructLAB
oniak3ibm
PRO
0
170
20241220_S3 tablesの使い方を検証してみた
handy
4
630
GitHub Copilot のテクニック集/GitHub Copilot Techniques
rayuron
37
15k
サイバー攻撃を想定したセキュリティガイドライン 策定とASM及びCNAPPの活用方法
syoshie
3
1.3k
オプトインカメラ:UWB測位を応用したオプトイン型のカメラ計測
matthewlujp
0
180
マイクロサービスにおける容易なトランザクション管理に向けて
scalar
0
140
[Ruby] Develop a Morse Code Learning Gem & Beep from Strings
oguressive
1
170
フロントエンド設計にモブ設計を導入してみた / 20241212_cloudsign_TechFrontMeetup
bengo4com
0
1.9k
NilAway による静的解析で「10 億ドル」を節約する #kyotogo / Kyoto Go 56th
ytaka23
3
380
サイボウズフロントエンドエキスパートチームについて / FrontendExpert Team
cybozuinsideout
PRO
5
38k
Featured
See All Featured
VelocityConf: Rendering Performance Case Studies
addyosmani
326
24k
It's Worth the Effort
3n
183
28k
Typedesign – Prime Four
hannesfritz
40
2.4k
Building Better People: How to give real-time feedback that sticks.
wjessup
365
19k
Navigating Team Friction
lara
183
15k
10 Git Anti Patterns You Should be Aware of
lemiorhan
PRO
656
59k
[RailsConf 2023] Rails as a piece of cake
palkan
53
5k
How to Ace a Technical Interview
jacobian
276
23k
Product Roadmaps are Hard
iamctodd
PRO
49
11k
Dealing with People You Can't Stand - Big Design 2015
cassininazir
365
25k
What's in a price? How to price your products and services
michaelherold
243
12k
Fashionably flexible responsive web design (full day workshop)
malarkey
405
66k
Transcript
@cppgohan with Server-Sent Events
Flask?
Flask? MicroFramework again...
Flask? MicroFramework again... Written in Python
=
=
Werkzeug WSGI utility library =
+ Werkzeug WSGI utility library =
+ Werkzeug WSGI utility library =
+ Werkzeug WSGI utility library Jinja2 template engine =
Hello.py Demo
Hello.py Demo
Hello.py Demo
index.html Demo
index.html Demo result???
index.html Demo result??? • terminal run: python hello.py • open
http://localhost:5000
Server-Sent Event server push的html5标准, 用法简易, 单次连接比polling高效些. 相比websocket的双向二进制数据, Server-Sent Event只是单向, HTTP协议.
(但浏览器调试工具往往没法看到服务器发来的数据, X_X) Server对Client的请求, 做stream方式的响应.
Server-Sent Event
Server-Sent Event 支 持 率 不 高 , 暂 时
只 能 ”玩 ” 要 兼 容 处 理
Demo index.html
Demo hello.py
Demo redis:
Demo redis: demo:FILE_TEXT -- 每次python读出来的文本 demo:FILE_TEXT_SEQ -- 为文本版本号, 每次文本更新, 版本号+1
/sever_push响应 -- 当FILE_TEXT_SEQ增加时, 将最新的文本返回给浏览器
Demo result???
Demo result??? • terminal run: python hello.py
Demo result??? • terminal run: python hello.py • open http://localhost:5000
Demo result??? • terminal run: python hello.py • open http://localhost:5000
• block!!!
Demo result??? • terminal run: python hello.py • open http://localhost:5000
• block!!! solution???
Demo result??? • terminal run: python hello.py • open http://localhost:5000
• block!!! • async WSGI server! (eg. gunicorn + gevent, gevent) solution???
Demo result??? • terminal run: python hello.py • open http://localhost:5000
• block!!! • async WSGI server! (eg. gunicorn + gevent, gevent) • terminal run: gunicorn -k gevent -b '0.0.0.0:5000' hello:app solution???
Demo result??? • terminal run: python hello.py • open http://localhost:5000
• block!!! • async WSGI server! (eg. gunicorn + gevent, gevent) • terminal run: gunicorn -k gevent -b '0.0.0.0:5000' hello:app • open http://localhost:5000 solution???
Demo result??? • terminal run: python hello.py • open http://localhost:5000
• block!!! • async WSGI server! (eg. gunicorn + gevent, gevent) • terminal run: gunicorn -k gevent -b '0.0.0.0:5000' hello:app • open http://localhost:5000 • open http://localhost:5000 again! solution???
More Demo Server下发代码示例
More Demo • start web server • open http://localhost:5000 •
server push js script... • browser excute js script... • ... Server下发代码示例
More Usage •网站动态更新 •区分客户端推送 •微博墙实现 •webgame服务器推送 •浏览器插件
Resources • http://www.python.org/dev/peps/pep-0333/ • http://werkzeug.pocoo.org/ • http://jinja.pocoo.org/ • http://flask.pocoo.org/ •
http://www.gevent.org/ • http://gunicorn.org/ • http://dev.w3.org/html5/eventsource/ • http://www.html5rocks.com/en/tutorials/eventsource/basics/ • http://www.w3schools.com/html/html5_serversentevents.asp
END; 2013, 分享不止!