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
本部長の代わりに提案書レビュー! KDDI営業が毎日使うAIエージェント「A-BOSS」開発秘話
minorun365
PRO
14
2k
OCI Oracle Database Services新機能アップデート(2025/03-2025/05)
oracle4engineer
PRO
1
190
Rubyで作る論理回路シミュレータの設計の話 - Kashiwa.rb #12
kozy4324
1
330
In Praise of "Normal" Engineers (LDX3)
charity
2
1.1k
ユーザーのプロフィールデータを活用した推薦精度向上の取り組み
yudai00
0
440
監視のこれまでとこれから/sakura monitoring seminar 2025
fujiwara3
10
2.4k
20250623 Findy Lunch LT Brown
3150
0
670
Uniadex__公開版_20250617-AIxIoTビジネス共創ラボ_ツナガルチカラ_.pdf
iotcomjpadmin
0
130
初めてのAzure FunctionsをClaude Codeで作ってみた / My first Azure Functions using Claude Code
hideakiaoyagi
1
150
Oracle Audit Vault and Database Firewall 20 概要
oracle4engineer
PRO
1
1.6k
VISITS_AIIoTビジネス共創ラボ登壇資料.pdf
iotcomjpadmin
0
130
Абьюзим random_bytes(). Фёдор Кулаков, разработчик Lamoda Tech
lamodatech
0
190
Featured
See All Featured
4 Signs Your Business is Dying
shpigford
184
22k
It's Worth the Effort
3n
184
28k
[RailsConf 2023 Opening Keynote] The Magic of Rails
eileencodes
29
9.5k
Producing Creativity
orderedlist
PRO
346
40k
Building a Modern Day E-commerce SEO Strategy
aleyda
41
7.3k
Measuring & Analyzing Core Web Vitals
bluesmoon
7
480
The Myth of the Modular Monolith - Day 2 Keynote - Rails World 2024
eileencodes
26
2.8k
The Cult of Friendly URLs
andyhume
79
6.4k
How to Create Impact in a Changing Tech Landscape [PerfNow 2023]
tammyeverts
52
2.8k
What’s in a name? Adding method to the madness
productmarketing
PRO
22
3.5k
Designing Dashboards & Data Visualisations in Web Apps
destraynor
231
53k
RailsConf 2023
tenderlove
30
1.1k
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!