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
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
package sleepy
import (
"encoding/json"
"fmt"
"net/http"
"net/url"
)
const (
GET = "GET"
POST = "POST"
PUT = "PUT"
DELETE = "DELETE"
)
type geter interface {
Get(values url.Values) (int, interface{})
}
type poster interface {
Post(values url.Values) (int, interface{})
}
type puter interface {
Put(values url.Values) (int, interface{})
}
type deleter interface {
Delete(values url.Values) (int, interface{})
}
type API struct {
mux *http.ServeMux
}
func (api *API) Abort(rw http.ResponseWriter, statusCode int) {
rw.WriteHeader(statusCode)
rw.Write([]byte(http.StatusText(statusCode)))
}
func (api *API) requestHandler(resource interface{}) http.HandlerFunc {
return func(rw http.ResponseWriter, request *http.Request) {
method := request.Method
if request.ParseForm() != nil {
api.Abort(rw, 400)
return
}
values := request.Form
var data interface{} = ""
var code int = 405
switch method {
case GET:
if r, ok := resource.(geter); ok {
code, data = r.Get(values)
}
case POST:
if r, ok := resource.(poster); ok {
code, data = r.Post(values)
}
case PUT:
if r, ok := resource.(puter); ok {
code, data = r.Put(values)
}
case DELETE:
if r, ok := resource.(deleter); ok {
code, data = r.Delete(values)
}
default:
api.Abort(rw, 405)
return
}
content, err := json.Marshal(data)
if err != nil {
api.Abort(rw, 500)
}
rw.WriteHeader(code)
rw.Write(content)
}
}
func (api *API) AddResource(resource interface{}, path string) {
if api.mux == nil {
api.mux = http.NewServeMux()
}
api.mux.HandleFunc(path, api.requestHandler(resource))
}
func (api *API) Start(port int) error {
if api.mux == nil {
return &errorString{"You must add at last one resource to this API."}
}
portString := fmt.Sprintf(":%d", port)
http.ListenAndServe(portString, api.mux)
return nil
}
|
