构建一个web
在浏览器输入http://localhost:8080
代码语言：javascript复制import (
"net/http"
"fmt"
"log"
)
func sayhelloGolang(w http.ResponseWriter, r *http.Request) {
r.ParseForm() //解析参数，默认是不会解析的
fmt.Println("path", r.URL.Path)
w.Write([]byte("Hello Golang"))
}
func main() {
http.HandleFunc("/", sayhelloGolang) //设置访问的路由
err := http.ListenAndServe(":8080", nil) //设置监听的端口
if err != nil {
log.Fatal("ListenAndServe: ", err)
}
}继承ServeHTTP
代码语言：javascript复制type BaseHander struct {
}
func (hander *BaseHander)ServeHTTP(resp http.ResponseWriter,req *http.Request){
fmt.Println("url path=>",req.URL.Path)
fmt.Println("url param a =>",req.URL.Query().Get("a"))
resp.Write([]byte("hello world"))
}
func main() {
http.ListenAndServe(":8080",&BaseHander{});
}net/http 路由
代码语言：javascript复制package mux
import (
"net/http"
)
type muxHandler struct {
handlers map[string]http.Handler
handleFuncs map[string]func(resp http.ResponseWriter, req *http.Request)
}
func NewMuxHandler() *muxHandler {
return &muxHandler{
make(map[string]http.Handler),
make(map[string]func(resp http.ResponseWriter, req *http.Request)),
}
}
func (handler *muxHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
urlPath := req.URL.Path
if hl, ok := handler.handlers[urlPath]; ok {
hl.ServeHTTP(resp, req)
return
}
if fn, ok := handler.handleFuncs[urlPath]; ok {
fn(resp, req)
return
}
http.NotFound(resp, req)
}
func (hander *muxHandler) Handle(pattern string, hl http.Handler) {
hander.handlers[pattern] = hl
}
func (handler *muxHandler) HandleFunc(pattern string, fn func(resp http.ResponseWriter, req *http.Request)) {
handler.handleFuncs[pattern] = fn
}var (
port string
)
func main() {
flag.StringVar(&port, "port", ":8080", "port to listen")
flag.Parse()
router :=mux.NewMuxHandler()
router.Handle("/hello/golang/", &BaseHander{})
router.HandleFunc("/hello/world", func(resp http.ResponseWriter, req *http.Request) {
resp.Write([]byte("hello world"))
})
http.ListenAndServe(port, router)
}
