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effective_go: use html/template instead of text/template

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Should have done this a long time ago.
Fixes #3811.

R=golang-dev, adg, rsc
CC=golang-dev
https://golang.org/cl/6488120
This commit is contained in:
Rob Pike 2012-09-13 13:41:13 -07:00
parent 032e5bfb30
commit f3fc0090f4
2 changed files with 11 additions and 10 deletions
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15
doc/effective_go.html
View file

@ -2992,11 +2992,11 @@ server; it blocks while the server runs.
executes the template on the data in the form value named <code>s</code>.
</p>
<p>
The template package is powerful;
The template package <code>html/template</code> is powerful;
this program just touches on its capabilities.
In essence, it rewrites a piece of text on the fly by substituting elements derived
In essence, it rewrites a piece of HTML text on the fly by substituting elements derived
from data items passed to <code>templ.Execute</code>, in this case the
form value.
form value.
Within the template text (<code>templateStr</code>),
double-brace-delimited pieces denote template actions.
The piece from <code>{{html "{{if .}}"}}</code>
@ -3005,13 +3005,14 @@ is non-empty.
That is, when the string is empty, this piece of the template is suppressed.
</p>
<p>
The snippet <code>{{html "{{urlquery .}}"}}</code> says to process the data with the function
<code>urlquery</code>, which sanitizes the query string
for safe display on the web page.
The two snippets <code>{{html "{{.}}"}}</code> say to show the data presented to
the template—the query string—on the web page.
The HTML template package automatically provides appropriate escaping so the
text is safe to display.
</p>
<p>
The rest of the template string is just the HTML to show when the page loads.
If this is too quick an explanation, see the <a href="/pkg/text/template/">documentation</a>
If this is too quick an explanation, see the <a href="/pkg/html/template/">documentation</a>
for the template package for a more thorough discussion.
</p>
<p>

6
doc/progs/eff_qr.go
View file

@ -8,9 +8,9 @@ package main
import (
"flag"
"html/template"
"log"
"net/http"
"text/template"
)
var addr = flag.String("addr", ":1718", "http service address") // Q=17, R=18
@ -37,9 +37,9 @@ const templateStr = `
</head>
<body>
{{if .}}
<img src="http://chart.apis.google.com/chart?chs=300x300&cht=qr&choe=UTF-8&chl={{urlquery .}}" />
<img src="http://chart.apis.google.com/chart?chs=300x300&cht=qr&choe=UTF-8&chl={{.}}" />
<br>
{{html .}}
{{.}}
<br>
<br>
{{end}}