/
effect.go
78 lines (69 loc) · 1.37 KB
/
effect.go
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
package circuitbreaker
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"strings"
"github.com/mailgun/log"
"github.com/mailgun/vulcan/netutils"
)
type SideEffect interface {
Exec() error
}
type Webhook struct {
URL string
Method string
Headers http.Header
Form url.Values
Body []byte
}
type WebhookSideEffect struct {
w Webhook
}
func NewWebhookSideEffect(w Webhook) (*WebhookSideEffect, error) {
if w.Method == "" {
return nil, fmt.Errorf("Supply method")
}
_, err := netutils.ParseUrl(w.URL)
if err != nil {
return nil, err
}
return &WebhookSideEffect{w: w}, nil
}
func (w *WebhookSideEffect) getBody() io.Reader {
if len(w.w.Form) != 0 {
return strings.NewReader(w.w.Form.Encode())
}
if len(w.w.Body) != 0 {
return bytes.NewBuffer(w.w.Body)
}
return nil
}
func (w *WebhookSideEffect) Exec() error {
r, err := http.NewRequest(w.w.Method, w.w.URL, w.getBody())
if err != nil {
return err
}
if len(w.w.Headers) != 0 {
netutils.CopyHeaders(r.Header, w.w.Headers)
}
if len(w.w.Form) != 0 {
r.Header.Set("Content-Type", "application/x-www-form-urlencoded")
}
re, err := http.DefaultClient.Do(r)
if err != nil {
return err
}
if re.Body != nil {
defer re.Body.Close()
}
body, err := ioutil.ReadAll(re.Body)
if err != nil {
return err
}
log.Infof("%v got response: (%s): %s", w, re.Status, string(body))
return nil
}