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
63
Introduction to Bittorrent sync
gohan
0
95
Twitter bootstrap 小试
gohan
0
99
Introduction To Hubot
gohan
1
220
Other Decks in Technology
See All in Technology
Figma Dev Mode MCP Serverを用いたUI開発
zoothezoo
0
230
QuickSight SPICE の効果的な運用戦略~S3 + Athena 構成での実践ノウハウ~/quicksight-spice-s3-athena-best-practices
emiki
0
290
20250708オープンエンドな探索と知識発見
sakana_ai
PRO
4
1k
全部AI、全員Cursor、ドキュメント駆動開発 〜DevinやGeminiも添えて〜
rinchsan
10
5.1k
CDK Toolkit Libraryにおけるテストの考え方
smt7174
1
550
スタックチャン家庭用アシスタントへの道
kanekoh
0
120
SRE with AI:実践から学ぶ、運用課題解決と未来への展望
yoshiiryo1
0
300
AI時代にも変わらぬ価値を発揮したい: インフラ・クラウドを切り口にユーザー価値と非機能要件に向き合ってエンジニアとしての地力を培う
netmarkjp
0
130
How Do I Contact Jetblue Airlines® Reservation Number: Fast Support Guide
thejetblueairhelpsupport
0
150
Bill One 開発エンジニア 紹介資料
sansan33
PRO
4
13k
60以上のプロダクトを持つ組織における開発者体験向上への取り組み - チームAPIとBackstageで構築する組織の可視化基盤 - / sre next 2025 Efforts to Improve Developer Experience in an Organization with Over 60 Products
vtryo
3
1.9k
Amplify Gen2から知るAWS CDK Toolkit Libraryの使い方/How to use the AWS CDK Toolkit Library as known from Amplify Gen2
fossamagna
1
350
Featured
See All Featured
XXLCSS - How to scale CSS and keep your sanity
sugarenia
248
1.3M
Practical Orchestrator
shlominoach
189
11k
Automating Front-end Workflow
addyosmani
1370
200k
Practical Tips for Bootstrapping Information Extraction Pipelines
honnibal
PRO
21
1.3k
Building Adaptive Systems
keathley
43
2.7k
Building Flexible Design Systems
yeseniaperezcruz
328
39k
実際に使うSQLの書き方 徹底解説 / pgcon21j-tutorial
soudai
PRO
181
54k
Optimising Largest Contentful Paint
csswizardry
37
3.3k
ReactJS: Keep Simple. Everything can be a component!
pedronauck
667
120k
Improving Core Web Vitals using Speculation Rules API
sergeychernyshev
18
990
RailsConf & Balkan Ruby 2019: The Past, Present, and Future of Rails at GitHub
eileencodes
138
34k
Why You Should Never Use an ORM
jnunemaker
PRO
58
9.5k
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!