2_16x9_filtered.jpg.pagespeed.ce.zVPGFVmXTR.jpg
有关 restful 可以参看
会说话Restful
创建工程
创建工程，然后创建 main 文件，引用所需包。
package main
import (
"encoding/json"
"log"
"net/http"
"math/rand"
"strconv"
"github.com/gorilla/mux"
)
func main(){
}
设计路由
这里引用一个 Mux 的包用于创建路由
func main(){
//Init Router
r := mux.NewRouter()
//Route Handlers / Endpoints
r.HandleFunc("/api/tuts", getTuts).Methods("GET")
}
//Init Router
r := mux.NewRouter()
//Route Handlers / Endpoints
r.HandleFunc("/api/tuts", getTuts).Methods("GET")
r.HandleFunc("/api/tuts/{id}", getTut).Methods("GET")
r.HandleFunc("/api/tuts", createTut).Methods("POST")
r.HandleFunc("/api/tuts/{id}", updateTut).Methods("PUT")
r.HandleFunc("/api/tuts/{id}", deleteTut).Methods("DELETE")
定义服务
log.Fatal(http.ListenAndServe(":4200",r))
定义数据模型结构
// tut struct (Model)
type Tut struct{
ID string `json:"id"`
Isbn string `json:"isbn"`
Title string `json:"title"`
Author *Author `json:"author"`
}
// Author Struct
type Author struct{
Name string `json:"name"`
}
定义请求的处理句柄
func getTuts(w http.ResponseWriter, r *http.Request){
}
// get Single Tut
func getTut(w http.ResponseWriter, r *http.Request){
}
// create new Tut
func createTut(w http.ResponseWriter, r *http.Request){
}
//update tut
func updateTut(w http.ResponseWriter, r *http.Request){
}
//delete tut
func deleteTut(w http.ResponseWriter, r *http.Request){
}
模拟数据库
tuts = append(tuts, Tut{ID:"1",Isbn:"123",Title:"angular base tut",Author:&Author{
Name:"zidea",
}})
tuts = append(tuts, Tut{ID:"2",Isbn:"345",Title:"vue base tut",Author:&Author{
Name:"tina",
}})
tuts = append(tuts, Tut{ID:"3",Isbn:"456",Title:"react base tut",Author:&Author{
Name:"zidea",
}})
实现获取所有课程的列表
func getTuts(w http.ResponseWriter, r *http.Request){
w.Header().Set("Content-Type","application/json")
json.NewEncoder(w).Encode(tuts)
}
修改代码后我们需要重新 build 后再次启动服务。
然后可以 Postman 开测试一下我们的接口是否好用
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实现单条查找
func getTut(w http.ResponseWriter, r *http.Request){
w.Header().Set("Content-Type","application/json")
params := mux.Vars(r) //Get params
// loop through tuts and find with id
for _, item := range tuts {
if item.ID == params["id"]{
json.NewEncoder(w).Encode(item)
return
}
}
json.NewEncoder(w).Encode(&Tut{})
}
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创建课程
func createTut(w http.ResponseWriter, r *http.Request){
w.Header().Set("Content-Type","application/json")
var tut Tut
_ = json.NewDecoder(r.Body).Decode(&tut)
tut.ID = strconv.Itoa(rand.Intn(1000)) // Mock Id
tuts = append(tuts, tut)
json.NewEncoder(w).Encode(tut)
}
测试接口
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实现删除课程
func deleteTut(w http.ResponseWriter, r *http.Request){
fmt.Println("call delete handler")
w.Header().Set("Content-Type","application/json")
params := mux.Vars(r)
fmt.Println(params["id"])
for index, item := range tuts{
if item.ID == params["id"]{
tuts = append(tuts[:index],tuts[index+1:]...)
break
}
}
json.NewEncoder(w).Encode(tuts)
}
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更新课程
func updateTut(w http.ResponseWriter, r *http.Request){
fmt.Println("call delete handler")
w.Header().Set("Content-Type","application/json")
params := mux.Vars(r)
fmt.Println(params["id"])
for index, item := range tuts{
if item.ID == params["id"]{
tuts = append(tuts[:index],tuts[index+1:]...)
var tut Tut
_ = json.NewDecoder(r.Body).Decode(&tut)
tut.ID = params["id"] // Mock Id
tuts = append(tuts, tut)
json.NewEncoder(w).Encode(tut)
return
}
}
json.NewEncoder(w).Encode(tuts)
}
屏幕快照 2019-04-06 上午7.40.48.png
