http 协议用于 web 开发，Go 语言中也实现了他，下面我们就来看下如何使用他。

hello world

package main

import (
  "net/http"
  "log"
)

func main() {
  http.HandleFunc("/", func(writer http.ResponseWriter, request *http.Request) {
    writer.Write([]byte("hello world"))
  })
  log.Fatal(http.ListenAndServe(":8000", nil))
}

编译运行

1	go run http.go

打开浏览器 http://localhost:8000 就可以看到效果了，是不是很简单。

使用 html 模板

package main

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

func main() {
  http.HandleFunc("/", func(writer http.ResponseWriter, request *http.Request) {
    tmpl, _ := template.ParseFiles("index.html")
    data := make(map[string]interface{})
    data["Title"] = "Title"
    tmpl.ExecuteTemplate(writer, "index", data)
  })
  log.Fatal(http.ListenAndServe(":8000", nil))
}

index.html

{{define "index"}}
<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    {{.Title}}
</body>
</html>
{{end}}

加载静态 css/js 文件

package main

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

func main() {
  http.Handle("/css/", http.FileServer(http.Dir("static")))
  http.Handle("/js/", http.FileServer(http.Dir("static")))
  
  http.HandleFunc("/", func(writer http.ResponseWriter, request *http.Request) {   
    tmpl, _ := template.ParseFiles("index.html")
    data := make(map[string]interface{})
    data["Title"] = "Title"
    tmpl.ExecuteTemplate(writer, "index", data)
  })
  log.Fatal(http.ListenAndServe(":8000", nil))
}

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