技術標籤：Go

最近實習要用工具完成一個增刪改查的demo，demo做好了，發現不會提交請求，只好去學一下http的內容；
下面直接放程式碼，包括了4中型別分別怎麼提交的程式碼。

package main

import (
	"fmt"
	"io/ioutil"
	"net/http"
	"strconv"
	"strings"
)

func user_insert(name string){
	url := "http://127.0.0.1:8080/user/insert"
	contentType :=
 
 "application/json"
	data := `{"name":"`+name+`"}`

	resp, err := http.Post(url, contentType, strings.NewReader(data))
	if err != nil {
		fmt.Printf("post failed, err: %v \n",err)
		return
	}
	defer resp.Body.Close()

	b, err := ioutil.ReadAll(resp.Body)
	if err !=
 
 nil {
		fmt.Printf("get resp failed, err:%v \n", err)
		return
	}
	fmt.Println(string(b))
}
func user_delete(id int){
	userid := strconv.Itoa(id)
	url := "http://127.0.0.1:8080/user/del/" + userid

	req, err := http.NewRequest("DELETE", url, nil)
	if err != nil {
		fmt.Printf("NewRequest failed, err: %v \n"
 
,err)
		return
	}
	res, err := http.DefaultClient.Do(req)
	if err != nil {
		fmt.Printf("DefaultClient failed, err: %v \n",err)
		return
	}
	defer res.Body.Close()

	b, err := ioutil.ReadAll(res.Body)
	if err != nil {
		fmt.Printf("get res failed, err:%v \n", err)
		return
	}
	fmt.Println(string(b))
}
func user_query(id int){
	userid := strconv.Itoa(id)
	url := "http://127.0.0.1:8080/user/query?id=" + userid

	resp, err := http.Get(url)
	if err != nil {
		fmt.Printf("post failed, err: %v \n",err)
		return
	}
	defer resp.Body.Close()

	b, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		fmt.Printf("get resp failed, err:%v \n", err)
		return
	}
	fmt.Println(string(b))
}
func user_update(id int, name string){
	userid := strconv.Itoa(id)
	url := "http://127.0.0.1:8080/user/update/" + userid
	data := `{"name":"`+name+`"}`

	req, err := http.NewRequest("PUT", url, strings.NewReader(data))
	if err != nil {
		fmt.Printf("NewRequest failed, err: %v \n",err)
		return
	}
	res, err := http.DefaultClient.Do(req)
	if err != nil {
		fmt.Printf("DefaultClient failed, err: %v \n",err)
		return
	}
	defer res.Body.Close()

	b, err := ioutil.ReadAll(res.Body)
	if err != nil {
		fmt.Printf("get res failed, err:%v \n", err)
		return
	}
	fmt.Println(string(b))
}
func main(){
	var operating string
	loop:
		for{
			fmt.Println("please choose your operation: insert,delete,query,update")
			fmt.Println("enter quit to break")
			fmt.Scanf("%s", &operating)
			switch operating{
			case "insert":
				var username string
				fmt.Println("please enter the user_name:")
				fmt.Scanf("%s", &username)
				user_insert(username)
			case "delete":
				var userid int
				fmt.Println("please enter the user_id:")
				fmt.Scanf("%d", &userid)
				user_delete(userid)
			case "query":
				var userid int
				fmt.Println("please enter the user_id:")
				fmt.Scanf("%d", &userid)
				user_query(userid)
			case "update":
				var userid int
				var username string
				fmt.Println("please enter the user_id and user_name:")
				fmt.Scanf("%d %s", &userid, &username)
				user_update(userid, username)
			case "quit":
				break loop
			default:
				fmt.Println("error, please enter the right operation!")
			}
		}
}