/
client.go
210 lines (180 loc) · 4.1 KB
/
client.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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
package contentchef
import (
"bytes"
"context"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"reflect"
"time"
"github.com/google/go-querystring/query"
)
const (
libraryVersion = "1.0.2"
userAgent = "contentchef-go/" + libraryVersion
mediaType = "application/json"
)
// Client manages the communication with the ContenChef API.
type Client struct {
httpClient *http.Client
BaseURL *url.URL
SpaceID string
TargetDate time.Time
}
// ClientOptions is the configuration object passed to the Client constructor
type ClientOptions struct {
// The base URL of your Content Chef instance REQUIRED
BaseURL string
// Your Content Chef SpaceID REQUIRED
SpaceID string
// If you don't want to use the default HTTP client you can set a custom one
Client *http.Client
// TargetDate is used to retrieve contents in the preview channel in a specific dare different from the current date
TargetDate time.Time
}
// NewClient return a new Client reference
//
// It takes a ClientOptions reference.
func NewClient(o *ClientOptions) (*Client, error) {
BaseURL, err := url.Parse(o.BaseURL)
if err != nil {
return nil, err
}
if o.SpaceID == "" {
return nil, errors.New("SpaceID must be setted")
}
httpClient := o.Client
if httpClient == nil {
httpClient = http.DefaultClient
}
cf := &Client{
httpClient,
BaseURL,
o.SpaceID,
o.TargetDate,
}
return cf, nil
}
func (c *Client) newRequest(method, urlStr string, body interface{}) (*http.Request, error) {
u, err := c.BaseURL.Parse(urlStr)
if err != nil {
return nil, err
}
var buf io.ReadWriter
if body != nil {
buf = new(bytes.Buffer)
enc := json.NewEncoder(buf)
err := enc.Encode(body)
if err != nil {
return nil, err
}
}
req, err := http.NewRequest(method, u.String(), buf)
if err != nil {
return nil, err
}
if body != nil {
req.Header.Set("Content-Type", mediaType)
}
req.Header.Set("Accept", mediaType)
req.Header.Set("User-Agent", userAgent)
return req, nil
}
type response struct {
*http.Response
}
func newResponse(r *http.Response) *response {
return &response{Response: r}
}
func (c *Client) do(ctx context.Context, req *http.Request, v interface{}) (*response, error) {
if ctx == nil {
return nil, errors.New("context must be non-nil")
}
req = req.WithContext(ctx)
res, err := c.httpClient.Do(req)
if err != nil {
select {
case <-ctx.Done():
return nil, ctx.Err()
default:
}
return nil, err
}
defer res.Body.Close()
response := newResponse(res)
err = checkResponse(res)
if err != nil {
return response, err
}
if v != nil {
if w, ok := v.(io.Writer); ok {
io.Copy(w, res.Body)
} else {
decErr := json.NewDecoder(res.Body).Decode(v)
if decErr == io.EOF {
decErr = nil
}
if decErr != nil {
err = decErr
}
}
}
return response, err
}
type errorResponse struct {
Response *http.Response
Message string
X map[string]interface{} `json:"-"`
}
func (r *errorResponse) Error() string {
return fmt.Sprintf("%v %v: %d %v",
r.Response.Request.Method, r.Response.Request.URL,
r.Response.StatusCode, r.Message)
}
func checkResponse(r *http.Response) error {
if c := r.StatusCode; c >= 200 && c <= 299 {
return nil
}
errorResponse := &errorResponse{Response: r}
data, err := ioutil.ReadAll(r.Body)
if err == nil && len(data) > 0 {
err := json.Unmarshal(data, errorResponse)
if err != nil {
errorResponse.Message = string(data)
}
}
return errorResponse
}
func addOptions(path string, opts interface{}) (string, error) {
v := reflect.ValueOf(opts)
if v.Kind() == reflect.Ptr && v.IsNil() {
return path, nil
}
u, err := url.Parse(path)
if err != nil {
return path, err
}
qs, err := query.Values(opts)
if err != nil {
return path, err
}
u.RawQuery = qs.Encode()
return u.String(), nil
}
func (c *Client) get(ctx context.Context, path, apiKey string, opts, v interface{}) error {
path, err := addOptions(path, opts)
if err != nil {
return err
}
req, err := c.newRequest(http.MethodGet, path, nil)
if err != nil {
return err
}
req.Header.Set("X-Chef-Key", apiKey)
_, err = c.do(ctx, req, v)
return err
}