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go web服务(2)


练习:HTTP 处理

实现下面的类型,并在其上定义 ServeHTTP 方法。在 web 服务器中注册它们来处理指定的路径。


type String string type Struct struct { Greeting string Punct string Who string }


例如,可以使用如下方式注册处理方法:


http.Handle("/string", String("I'm a frayed knot.")) http.Handle("/struct", &Struct{"Hello", ":", "Gophers!"})



package main

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

type String string

type Struct struct {
Greeting string
Punct string
Who string
}

func (s String) ServeHTTP(w http.ResponseWriter, r *http.Request) {
fmt.Fprint(w, s)
}

func (s Struct) ServeHTTP(w http.ResponseWriter, r *http.Request) {
fmt.Fprint(w, s)
}

func main() {
http.Handle("/string", String("I'm a frayed knot."))
http.Handle("/struct", &Struct{"Hello", ":", "Gophers!"})
log.Fatal(http.ListenAndServe("localhost:4000", nil))
}







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