Masterminds/sprig 是一个强大的golang 模版函数，以下是一个unrolled/render 集成Masterminds/sprig 的简单demo
环境准备
- go.mod
module github.com/rongfengliang/renameio-app
go 1.14
require (
github.com/Masterminds/goutils v1.1.0 // indirect
github.com/Masterminds/semver v1.5.0 // indirect
github.com/Masterminds/sprig v2.22.0+incompatible
github.com/google/renameio v0.1.0
github.com/google/uuid v1.1.1 // indirect
github.com/huandu/xstrings v1.3.2 // indirect
github.com/imdario/mergo v0.3.10 // indirect
github.com/mitchellh/copystructure v1.0.0 // indirect
github.com/stretchr/testify v1.6.1 // indirect
github.com/unrolled/render v1.0.3
golang.org/x/crypto v0.0.0-20200728195943-123391ffb6de // indirect
)
- 项目结构
├── demo.conf
├── go.mod
├── go.sum
├── main.go
└── templates
├── admin
├── home
├── index.tmpl
└── layout.tmpl
golang 代码集成
- main.go
package main
import (
"encoding/xml"
"errors"
"html/template"
"net/http"
"github.com/Masterminds/sprig"
"github.com/google/renameio"
"github.com/unrolled/render"
)
// fielname for test
func filname() error {
confContent := `
nginx {
main {
server {
port :9090;
}
}
}
`
err := renameio.WriteFile("./demo.conf", []byte(confContent), 0644)
if err != nil {
return errors.New("some wrong:" + err.Error())
}
return nil
}
// render demo
func main() {
r := render.New(render.Options{
Layout: "layout",
IsDevelopment: true,
Funcs: []template.FuncMap{
sprig.FuncMap(),
},
})
mux := http.NewServeMux()
mux.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
w.Write([]byte("Welcome, visit sub pages now."))
})
ob := struct {
XMLName xml.Name `json:"-" xml:"dalongdemoapp"`
Name string `json:"dalongrong" xml:"dalongdemo"`
Items []string `json:"items" xml:"items"`
}{
Name: "dalong",
Items: []string{"demo", "app"},
}
mux.HandleFunc("/json", func(w http.ResponseWriter, req *http.Request) {
r.JSON(w, 200, ob)
})
mux.HandleFunc("/xml", func(w http.ResponseWriter, req *http.Request) {
r.XML(w, 200, ob)
})
mux.HandleFunc("/rename", func(w http.ResponseWriter, req *http.Request) {
if err := filname(); err != nil {
r.JSON(w, 500, "rename wrong")
return
}
r.JSON(w, 200, "rename ok")
})
mux.HandleFunc("/html", func(w http.ResponseWriter, req *http.Request) {
r.HTML(w, 200, "index", ob)
})
http.ListenAndServe("127.0.0.1:3000", mux)
}
- index.tmpl
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
{{.Name}}
{{ range .Items }}
<p>{{ . }}</p>
{{ end }}
{{ "hello!" | repeat 5 }}
{{ range $i,$v := .Items }}
<p>{{ $i }} {{$v}}</p>
{{ end }}
</body>
</html>
- layout.tmpl
<!-- templates/layout.tmpl -->
<html>
<head>
<title>My Layout</title>
<!-- Render the partial template called `css-$current_template` here -->
{{ partial "css" }}
</head>
<body>
<!-- render the partial template called `header-$current_template` here -->
{{ partial "header" }}
<!-- Render the current template here -->
{{ yield }}
This is the {{ current }} page.
<!-- render the partial template called `footer-$current_template` here -->
{{ partial "footer" }}
</body>
</html>
- 运行效果
go run main.go
集成模版函数的demo
说明
以上只是一个简单的集成，实际上sprig 还是很强大的，helm就集成了此模块
效果
参考资料
https://github.com/Masterminds/sprig
https://github.com/unrolled/render