Go HTTP接口简单例子

main.go

package main

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

type UserInfo struct {
	Email    string `json:"email"`
	Password string `json:"password"`
}

func main() {
	http.HandleFunc("/api/login", loginFunc)
	http.HandleFunc("/api/get", getUserInfo)
	http.HandleFunc("/", index)
	log.Fatal("启动服务失败：", http.ListenAndServe(":2333", nil))
}

func loginFunc(w http.ResponseWriter, r *http.Request) {
	setupResponse(&w, r)
	if (*r).Method == "OPTIONS" {
		return
	}

	decoder := json.NewDecoder(r.Body)
	res := false
	reqData := UserInfo{}
	decoder.Decode(&reqData)
	if reqData.Email != "" && reqData.Password != "" {
		res = true
	}
	fmt.Fprintf(w, "%v", res)
}

func getUserInfo(w http.ResponseWriter, r *http.Request) {
	setupResponse(&w, r)
	if (*r).Method == "OPTIONS" {
		return
	}

	resData := UserInfo{"123@qq.com", "123123"}
	j, _ := json.Marshal(resData)
	w.Header().Set("Content-Type", "application/json")
	w.Write(j)
}
func index(w http.ResponseWriter, r *http.Request) {
	setupResponse(&w, r)
	if (*r).Method == "OPTIONS" {
		return
	}
	fmt.Fprintf(w, "Hello golang http!")
}

// 允许跨域请求
func setupResponse(w *http.ResponseWriter, r *http.Request) {
	(*w).Header().Set("Access-Control-Allow-Origin", "*")
	(*w).Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")
	(*w).Header().Set("Access-Control-Allow-Headers", "Accept, Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization")
}