package main

import (
    "io"
    "log"
    "net/http"
)

func main() {
    // Hello world, the web server
    helloHandler := func(w http.ResponseWriter, req *http.Request) {
        io.WriteString(w, "Hello, world!\n")
    }

    http.HandleFunc("/hello", helloHandler)
    log.Fatal(http.ListenAndServe(":80", nil))
}

这是一个简单的go http server例子

package main

import (
    "io"
    "log"
    "net/http"
)

func main() {
    // Hello world, the web server
    helloHandler := func(w http.ResponseWriter, req *http.Request) {
        io.WriteString(w, "Hello, world!\n")
    }

    //这个可以防止直接ip访问和恶意绑定域名
    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        //重定向到首页
        http.Redirect(w, r, "https://www.domain.com", http.StatusMovedPermanently)
    })

    //指定域名访问
    http.HandleFunc("www.domain.com/hello", helloHandler)
    http.HandleFunc("domain.com/hello", helloHandler)
    
    log.Fatal(http.ListenAndServe(":80", nil))
}

上面加了一些代码是防止直接ip访问和防止恶意绑定其他域名