func Example_autoescaping() {
check := func(err error) {
if err != nil {
log.Fatal(err)
}
}
t, err := template.New("foo").Parse(`{{define "T"}}Hello, {{.}}!{{end}}`)
check(err)
err = t.ExecuteTemplate(os.Stdout, "T", "<script>alert('you have been pwned')</script>")
check(err)
// Output:
// Hello, <script>alert('you have been pwned')</script>!
}
func ParseTemplateFiles(templateFunc map[string]interface{}, filename ...string) (*template.Template, error) {
if len(filename) > 0 {
var funcMap template.FuncMap
if len(templateFunc) > 0 {
funcMap = template.FuncMap{}
for name, fc := range _FUNC_MAP {
funcMap[name] = fc
}
for name, fc := range templateFunc {
funcMap[name] = fc
}
} else {
funcMap = _FUNC_MAP
}
name := filepath.Base(filename[0])
return template.New(name).Funcs(funcMap).ParseFiles(filename...)
}
return nil, fmt.Errorf("html/template: no files named in call to ParseFiles")
}
func Example() {
const tpl = `
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>{{.Title}}</title>
</head>
<body>
{{range .Items}}<div>{{ . }}</div>{{else}}<div><strong>no rows</strong></div>{{end}}
</body>
</html>`
check := func(err error) {
if err != nil {
log.Fatal(err)
}
}
t, err := template.New("webpage").Parse(tpl)
data := struct {
Title string
Items []string
}{
Title: "My page",
Items: []string{
"My photos",
"My blog",
},
}
err = t.Execute(os.Stdout, data)
check(err)
noItems := struct {
Title string
Items []string
}{
Title: "My another page",
Items: []string{},
}
err = t.Execute(os.Stdout, noItems)
check(err)
// Output:
// <!DOCTYPE html>
// <html>
// <head>
// <meta charset="UTF-8">
// <title>My page</title>
// </head>
// <body>
// <div>My photos</div><div>My blog</div>
// </body>
// </html>
// <!DOCTYPE html>
// <html>
// <head>
// <meta charset="UTF-8">
// <title>My another page</title>
// </head>
// <body>
// <div><strong>no rows</strong></div>
// </body>
// </html>
}