/
http.go
170 lines (140 loc) · 3.57 KB
/
http.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
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
package http
import (
"bytes"
"errors"
"fmt"
"io"
"io/ioutil"
"net/http"
"time"
log "github.com/sirupsen/logrus"
)
// Requester interface
type Requester interface {
Post(url string, body []byte) ([]byte, error)
Get(url string) ([]byte, error)
}
// Req sends http request
type Req struct {
c *http.Client
headers map[string]string
cookies []http.Cookie
}
var defaultReq *Req
func init() {
defaultReq = &Req{c: &http.Client{Timeout: time.Duration(30) * time.Second}}
}
// NewHTTPRequester Factory
func NewHTTPRequester(timeout int, headers map[string]string, cookies []http.Cookie) Requester {
return &Req{
c: &http.Client{Timeout: time.Duration(timeout) * time.Second},
headers: headers,
cookies: cookies,
}
}
// SetTimeout sets timeout, which overwrites existing timeout
func (r *Req) SetTimeout(timeout int) *Req {
r.c = &http.Client{Timeout: time.Duration(timeout) * time.Second}
return r
}
// SetHeaders sets headers, which overwrites existing headers
func (r *Req) SetHeaders(headers map[string]string) *Req {
r.headers = headers
return r
}
// SetCookies sets cookies, which overwrites existing cookies
func (r *Req) SetCookies(cookies []http.Cookie) *Req {
r.cookies = cookies
return r
}
// Post implements HTTPRequester interface
func (r *Req) Post(url string, body []byte) ([]byte, error) {
req, err := r.newReq("POST", url, bytes.NewBuffer(body))
if err != nil {
return nil, err
}
r.addHeaders(req)
r.addCookies(req)
resp, err := r.doRequest(req)
if err != nil {
return nil, err
}
return r.readBody(resp)
}
// Get implements HTTPRequester interface
func (r *Req) Get(url string) ([]byte, error) {
req, err := r.newReq("GET", url, nil)
if err != nil {
return nil, err
}
r.addHeaders(req)
r.addCookies(req)
resp, err := r.doRequest(req)
if err != nil {
return nil, err
}
return r.readBody(resp)
}
// SetTimeout by default requester
func SetTimeout(timeout int) *Req {
return defaultReq.SetTimeout(timeout)
}
// SetHeaders by default requester
func SetHeaders(headers map[string]string) *Req {
return defaultReq.SetHeaders(headers)
}
// SetCookies by default requester
func SetCookies(cookies []http.Cookie) *Req {
return defaultReq.SetCookies(cookies)
}
// Post by default requester
func Post(url string, body []byte) ([]byte, error) {
return defaultReq.Post(url, body)
}
// Get by dfault requester
func Get(url string) ([]byte, error) {
return defaultReq.Get(url)
}
func (r *Req) newReq(method, url string, body io.Reader) (*http.Request, error) {
req, err := http.NewRequest(method, url, body)
if err != nil {
errorInfo := fmt.Sprintf("http.NewRequest failed for %s %s, error: %s", "GET", url, err)
log.Error(errorInfo)
return nil, errors.New(errorInfo)
}
defer req.Body.Close()
return req, nil
}
func (r *Req) addHeaders(req *http.Request) {
if r.headers != nil {
for key, value := range r.headers {
req.Header.Add(key, value)
}
}
}
func (r *Req) addCookies(req *http.Request) {
if r.cookies != nil {
for _, cookie := range r.cookies {
req.AddCookie(&cookie)
}
}
}
func (r *Req) doRequest(req *http.Request) (*http.Response, error) {
resp, err := r.c.Do(req)
if err != nil {
errorInfo := fmt.Sprintf("http.Client.Do failed, error: %s", err)
log.Error(errorInfo)
return nil, err
}
return resp, nil
}
func (r *Req) readBody(resp *http.Response) ([]byte, error) {
bodyBytes, err := ioutil.ReadAll(resp.Body)
if err != nil {
errorInfo := fmt.Sprintf("ioutil.ReadAll failed, error: %s", err)
log.Error(errorInfo)
return nil, errors.New(errorInfo)
}
defer resp.Body.Close()
return bodyBytes, nil
}