HTML模版

模版解析

tmpl, err := template.ParseFiles("layout.html")
if err != nil {
	panic(err)
}

或者

tmpl := template.Must(template.ParseFiles("layout.html"))

以上代码可加载模版文件。

模版执行

func(w http.ResponseWriter, r *http.Request) {
	tmpl.Execute(w, data)
}

请求执行代码运行时，模版会被写入响应体中，接口请求者会获得该内容。

完整代码

<h1>{{.PageTitle}}</h1>
<ul>
    {{range .Todos}}
        {{if .Done}}
            <li class="done">{{.Title}}</li>
        {{else}}
            <li>{{.Title}}</li>
        {{end}}
    {{end}}
</ul>

package main

import (
	"html/template"
	"net/http"
)

type Todo struct {
	Title string
	Done  bool
}

type TodoPageData struct {
	PageTitle string
	Todos     []Todo
}

func main() {
	tmpl := template.Must(template.ParseFiles("layout.html"))
	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		data := TodoPageData{
			PageTitle: "My TODO list",
			Todos: []Todo{
				{Title: "Task 1", Done: false},
				{Title: "Task 2", Done: true},
				{Title: "Task 3", Done: true},
			},
		}
		tmpl.Execute(w, data)
	})
	http.ListenAndServe(":8090", nil)
}