用Golang的http包建立Web服务器 案例

1、web.go

package main
import (
    "fmt"
    "log"
    "net/http"
    "strings"
)

func sayhello(w http.ResponseWriter, r *http.Request) {
    r.ParseForm()       //解析参数, 默认是不会解析的
    fmt.Println(r.Form) //这些是服务器端的打印信息
    fmt.Println("path", r.URL.Path)
    fmt.Println("scheme", r.URL.Scheme)
    fmt.Println(r.Form["url_long"])
    for k, v := range r.Form {
        fmt.Println("key:", k)
        fmt.Println("val:", strings.Join(v, ""))
    }
    fmt.Fprintf(w, "welcome to richerdyoung!") //输出到客户端的信息
}

func main() {
    http.HandleFunc("/", sayhello)       //设置访问的路由
    err := http.ListenAndServe(":8888", nil) //设置监听的端口
    if err != nil {
        log.Fatal("ListenAndServe: ", err)
    }
}

2、cmd运行web.go：go run web.go

3、打开浏览器，输入：localhost:8888