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
|
package eduvpn
import (
"fmt"
"io/ioutil"
"net/http"
"net/url"
"strings"
)
type HTTPResourceError struct {
URL string
Err error
}
func (e *HTTPResourceError) Error() string {
return fmt.Sprintf("failed obtaining HTTP resource %s with error %v", e.URL, e.Err)
}
type HTTPStatusError struct {
URL string
Status int
}
func (e *HTTPStatusError) Error() string {
return fmt.Sprintf("failed obtaining HTTP resource %s as it gave an unsuccesful status code %d", e.URL, e.Status)
}
type HTTPReadError struct {
URL string
Err error
}
func (e *HTTPReadError) Error() string {
return fmt.Sprintf("failed reading HTTP resource %s with error %v", e.URL, e.Err)
}
type HTTPParseJsonError struct {
URL string
Body string
Err error
}
func (e *HTTPParseJsonError) Error() string {
return fmt.Sprintf("failed parsing json %s for HTTP resource %s with error %v", e.Body, e.URL, e.Err)
}
type HTTPRequestCreateError struct {
URL string
Err error
}
func (e *HTTPRequestCreateError) Error() string {
return fmt.Sprintf("failed to create HTTP request with url %s and error %v", e.URL, e.Err)
}
type HTTPOptionalParams struct {
Headers *http.Header
}
func HTTPGet(url string) ([]byte, error) {
return HTTPGetWithOptionalParams(url, nil)
}
func HTTPConstructURL(baseURL string, parameters map[string]string) (string, error) {
url, err := url.Parse(baseURL)
if err != nil {
return "", err
}
q := url.Query()
for parameter, value := range parameters {
q.Set(parameter, value)
}
url.RawQuery = q.Encode()
return url.String(), nil
}
func HTTPGetWithOptionalParams(url string, opts *HTTPOptionalParams) ([]byte, error) {
client := &http.Client{}
req, reqErr := http.NewRequest(http.MethodGet, url, nil)
if reqErr != nil {
return nil, &HTTPRequestCreateError{URL: url, Err: reqErr}
}
if opts != nil && opts.Headers != nil {
for k, v := range *opts.Headers {
req.Header.Add(k, v[0])
}
}
resp, respErr := client.Do(req)
if respErr != nil {
return nil, &HTTPResourceError{URL: url, Err: respErr}
}
defer resp.Body.Close()
body, readErr := ioutil.ReadAll(resp.Body)
if readErr != nil {
return nil, &HTTPReadError{URL: url, Err: readErr}
}
return body, nil
}
func HTTPPost(url string, body url.Values) ([]byte, error) {
return HTTPPostWithOptionalParams(url, body, nil)
}
func HTTPPostWithOptionalParams(url string, data url.Values, opts *HTTPOptionalParams) ([]byte, error) {
client := &http.Client{}
req, reqErr := http.NewRequest(http.MethodPost, url, strings.NewReader(data.Encode()))
if reqErr != nil {
return nil, &HTTPRequestCreateError{URL: url, Err: reqErr}
}
if opts != nil && opts.Headers != nil {
for k, v := range *opts.Headers {
req.Header.Add(k, v[0])
}
}
resp, respErr := client.Do(req)
if respErr != nil {
return nil, &HTTPResourceError{URL: url, Err: respErr}
}
defer resp.Body.Close()
body, readErr := ioutil.ReadAll(resp.Body)
if readErr != nil {
return nil, &HTTPReadError{URL: url, Err: readErr}
}
return body, nil
}
|
