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
3 Things You May Not Know About The Go Template...
Search
Sau Sheong Chang
March 03, 2015
Technology
0
340
3 Things You May Not Know About The Go Template Engine
A short introduction to the Go template engine
Sau Sheong Chang
March 03, 2015
Tweet
Share
More Decks by Sau Sheong Chang
See All by Sau Sheong Chang
Genetic Algorithms with Go
sausheong
0
150
Programming Complexity
sausheong
0
940
Rollicking Ruby Robots Rule the World
sausheong
0
260
Money, Sex and Evolution (v3)
sausheong
0
99
Polyglot
sausheong
0
85
Developing Web Applications with Go
sausheong
7
800
Money, Sex and Evolution
sausheong
1
100
A Tale of Two Frameworks
sausheong
0
75
Ruby, Rock and Roll
sausheong
3
300
Other Decks in Technology
See All in Technology
英語は話せません!それでも海外チームと信頼関係を作るため、対話を重ねた2ヶ月間のまなび
niioka_97
0
130
AWS Top Engineer、浮いてませんか? / As an AWS Top Engineer, Are You Out of Place?
yuj1osm
2
180
Geospatialの世界最前線を探る [2025年版]
dayjournal
0
180
「AI駆動PO」を考えてみる - 作る速さから価値のスループットへ:検査・適応で未来を開発 / AI-driven product owner. scrummat2025
yosuke_nagai
3
800
OCI Network Firewall 概要
oracle4engineer
PRO
1
7.8k
業務効率化をさらに加速させる、ノーコードツールとStep Functionsのハイブリッド化
smt7174
2
110
実装で解き明かす並行処理の歴史
zozotech
PRO
1
640
SwiftUIのGeometryReaderとScrollViewを基礎から応用まで学び直す:設計と活用事例
fumiyasac0921
0
150
20201008_ファインディ_品質意識を育てる役目は人かAIか___2_.pdf
findy_eventslides
2
580
綺麗なデータマートをつくろう_データ整備を前向きに考える会 / Let's create clean data mart
brainpadpr
3
370
Exadata Database Service on Dedicated Infrastructure(ExaDB-D) UI スクリーン・キャプチャ集
oracle4engineer
PRO
3
5.5k
o11yで育てる、強い内製開発組織
_awache
3
140
Featured
See All Featured
Product Roadmaps are Hard
iamctodd
PRO
54
11k
RailsConf 2023
tenderlove
30
1.2k
Helping Users Find Their Own Way: Creating Modern Search Experiences
danielanewman
30
2.9k
What’s in a name? Adding method to the madness
productmarketing
PRO
23
3.7k
Building Better People: How to give real-time feedback that sticks.
wjessup
368
20k
Side Projects
sachag
455
43k
Sharpening the Axe: The Primacy of Toolmaking
bcantrill
45
2.5k
Imperfection Machines: The Place of Print at Facebook
scottboms
269
13k
The Psychology of Web Performance [Beyond Tellerrand 2023]
tammyeverts
49
3.1k
Scaling GitHub
holman
463
140k
Intergalactic Javascript Robots from Outer Space
tanoku
273
27k
Thoughts on Productivity
jonyablonski
70
4.9k
Transcript
3 Things You May Not Know About The Go
Template Engine Chang Sau Sheong Feb 2015
Obligatory stuff
What is a template engine?
None
None
Where’s Go template engine? Logic-‐less Go template
engine Embedded logic Mustache, Handlebars etc JSP, Haml, Jade etc
How does the Go template engine work?
text/template html/template
Parse template Execute template
<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>Go Web
Programming</title> </head> <body> {{ . }} </body> </html>
package main import ( "net/http" "html/template" ) func process(w http.ResponseWriter,
r *http.Request) { t, _ := template.ParseFiles("tmpl.html") t.Execute(w, "Hello World!") } func main() { server := http.Server{ Addr: "127.0.0.1:8080", } http.HandleFunc("/process", process) server.ListenAndServe() }
The Go template engine is kinda cool
1. Pipelines
{{ p1 | p2 | p3 }}
<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/ html; charset=utf-8"> <title>Go
Web Programming</title> </head> <body> {{ 12.3456 | printf "%.2f" }} </body> </html>
2. FuncTons
func formatDate(t time.Time) string { layout := "2006-01-02" return t.Format(layout)
} func process(w http.ResponseWriter, r *http.Request) { funcMap := template.FuncMap { "fdate": formatDate } t := template.New("tmpl.html").Funcs(funcMap) t, _ = t.ParseFiles("tmpl.html") t.Execute(w, time.Now()) }
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>Go Web Programming</title> </head>
<body> <div>The date/time is {{ fdate . }}</div> </body> </html>
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>Go Web Programming</title> </head>
<body> <div>The date/time is {{ . | fdate }}</div> </body> </html>
3. Context aware
func process(w http.ResponseWriter, r *http.Request) { t, _ := template.ParseFiles("tmpl.html")
content := `I asked: <i>"What's up?"</i>` t.Execute(w, content) }
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>Go Web Programming</title> </head>
<body> <div>{{ . }}</div> <div><a href="/{{ . }}">Path</a></div> <div><a href="/?q={{ . }}">Query</a></div> <div><a onclick="f('{{ . }}')">Onclick</a></div> </body> </html>
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>Go Web Programming</title> </head>
<body> <div>I asked: <i>"What's up?"</ i></div> <div><a href="/I%20asked:%20%3ci%3e%22What%27s%20up? %22%3c/i%3e">Path</a></div> <div><a href="/?q=I%20asked%3a%20%3ci%3e%22What%27s %20up%3f%22%3c%2fi%3e">Query</a></div> <div><a onclick="f('I asked: \x3ci\x3e\x22What\x27s up?\x22\x3c\/i\x3e')">Onclick</a></div> </body> </html>
Context Content Original text I asked: <i>"What's up?"</i> {{ .
}} I asked: <i>"What's up?"</i> <a href="/{{ . }}"> I%20asked:%20%3ci%3e%22What%27s%20up?%22%3c/i%3e <a href="/?q={{ . }}"> I%20asked%3a%20%3ci%3e%22What%27s%20up%3f%22%3c %2fi%3e <a onclick="{{ . }}"> I asked: \x3ci\x3e\x22What\x27s up?\x22\x3c\/i\x3e
XSS
XSS Demo
hWp://manning.com/chang
Thank you
[email protected]
@sausheong