Go语言，十分方便开发Api接口。而且不需要web服务器就能够实现。
现在想返回指定格式的Api，格式如下

1
2
3
4
5
6

{
    "code": 400,
    "data": {},
    "message": "非法访问!"
}

code

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
package web

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

func main() {
	fmt.Print("ready")
	http.HandleFunc("/login", loginTask)

	err := http.ListenAndServe("localhost:8081", nil)

	if err != nil{
		fmt.Println("ListanAndServer error: ", err.Error())
	}

}

func loginTask(w http.ResponseWriter, req *http.Request){
	fmt.Println("loginTash is running...")

	time.Sleep(time.Second * 2)

	req.ParseForm()
	param_userName , found1 := req.Form["username"]
	param_password, found2 := req.Form["password"]

	if !(found1 && found2) {
		fmt.Fprint(w, "请勿非法访问")
		return
	}
	result := newBaseJsonBean()
	userName := param_userName[0]
	password := param_password[0]

	s := "userName:" + userName + ", password:" + password
	fmt.Println(s)

	if userName == "zhangsan" && password == "123456"{
		result.Code = 100
		result.Message = "登录成功!"
		result.Date = struct {

		}{}
	} else {
		result.Code = 101
		result.Message = "密码错误"
		result.Date = struct {
		}{}
	}

	bytes, _ := json.Marshal(result)
	fmt.Fprint(w, string(bytes))
}


type BaseJsonBean struct{
	Code int `json:"code"`
	Date interface{} `json:"data"`
	Message string `json:"message"`
}

func newBaseJsonBean() *BaseJsonBean{
	return &BaseJsonBean{}
}

测试

访问localhost:8081/login，使用post方式
传递参数

1
2
username:zhangsan
password:123456

返回信息

1
2
3
4
5
{
    "code": 100,
    "data": {},
    "message": "登录成功!"
}