-
-
Notifications
You must be signed in to change notification settings - Fork 44
/
config.go
278 lines (235 loc) · 5.94 KB
/
config.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
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
package caddy
import (
"fmt"
"net/http"
"strconv"
"strings"
"time"
"github.com/caddyserver/caddy/v2/caddyconfig/caddyfile"
"github.com/caddyserver/caddy/v2/caddyconfig/httpcaddyfile"
"github.com/caddyserver/caddy/v2/modules/caddyhttp"
)
func init() {
httpcaddyfile.RegisterHandlerDirective("sablier", parseCaddyfile)
}
type DynamicConfiguration struct {
DisplayName string
ShowDetails *bool
Theme string
RefreshFrequency *time.Duration
}
type BlockingConfiguration struct {
Timeout *time.Duration
}
type Config struct {
SablierURL string
Names []string
Group string
SessionDuration *time.Duration
Dynamic *DynamicConfiguration
Blocking *BlockingConfiguration
}
func CreateConfig() *Config {
return &Config{
SablierURL: "http://sablier:10000",
Names: []string{},
SessionDuration: nil,
Dynamic: nil,
Blocking: nil,
}
}
// UnmarshalCaddyfile implements caddyfile.Unmarshaler. Syntax:
//
// sablier [<sablierURL>] {
// [names container1,container2,...]
// [group mygroup]
// [session_duration 30m]
// dynamic {
// [display_name This is my display name]
// [show_details yes|true|on]
// [theme hacker-terminal]
// [refresh_frequency 2s]
// }
// blocking {
// [timeout 1m]
// }
// }
//
func (c *Config) UnmarshalCaddyfile(d *caddyfile.Dispenser) error {
for d.Next() {
if d.NextArg() {
c.SablierURL = d.Val()
} else {
c.SablierURL = "http://sablier:10000"
}
if d.NextArg() {
return d.ArgErr()
}
for nesting := d.Nesting(); d.NextBlock(nesting); {
subdirective := d.Val()
args := strings.Join(d.RemainingArgs(), " ")
switch subdirective {
case "names":
c.Names = parseNames(args)
case "group":
c.Group = args
case "session_duration":
duration, err := time.ParseDuration(args)
if err != nil {
return err
}
c.SessionDuration = &duration
case "dynamic":
dynamic, err := parseDynamic(d)
if err != nil {
return err
}
c.Dynamic = dynamic
case "blocking":
blocking, err := parseBlocking(d)
if err != nil {
return err
}
c.Blocking = blocking
}
}
}
if c.Blocking == nil && c.Dynamic == nil {
return fmt.Errorf("you must specify one strategy (dynamic or blocking)")
}
if c.Blocking != nil && c.Dynamic != nil {
return fmt.Errorf("you must specify only one strategy")
}
if len(c.Names) == 0 && len(c.Group) == 0 {
return fmt.Errorf("you must specify names or group")
}
if len(c.Names) > 0 && len(c.Group) > 0 {
return fmt.Errorf("you must specify either names or group")
}
return nil
}
func parseNames(value string) []string {
names := strings.Split(value, " ")
for i := range names {
names[i] = strings.TrimSpace(names[i])
}
if len(names) == 1 && names[0] == "" {
return make([]string, 0)
}
return names
}
func parseDynamic(d *caddyfile.Dispenser) (*DynamicConfiguration, error) {
conf := &DynamicConfiguration{}
for nesting := d.Nesting(); d.NextBlock(nesting); {
subdirective := d.Val()
args := strings.Join(d.RemainingArgs(), " ")
switch subdirective {
case "display_name":
conf.DisplayName = args
case "show_details":
shouldShow := isEnabledArg(args)
conf.ShowDetails = &shouldShow
case "theme":
conf.Theme = args
case "refresh_frequency":
duration, err := time.ParseDuration(args)
if err != nil {
return nil, err
}
conf.RefreshFrequency = &duration
}
}
return conf, nil
}
func parseBlocking(d *caddyfile.Dispenser) (*BlockingConfiguration, error) {
conf := &BlockingConfiguration{}
for nesting := d.Nesting(); d.NextBlock(nesting); {
subdirective := d.Val()
args := strings.Join(d.RemainingArgs(), " ")
switch subdirective {
case "timeout":
duration, err := time.ParseDuration(args)
if err != nil {
return nil, err
}
conf.Timeout = &duration
}
}
return conf, nil
}
func parseCaddyfile(h httpcaddyfile.Helper) (caddyhttp.MiddlewareHandler, error) {
var c Config
err := c.UnmarshalCaddyfile(h.Dispenser)
return SablierMiddleware{Config: c}, err
}
func isEnabledArg(s string) bool {
if s == "yes" || s == "true" || s == "on" {
return true
}
return false
}
func (c *Config) BuildRequest() (*http.Request, error) {
if c.Dynamic != nil {
return c.buildDynamicRequest()
} else if c.Blocking != nil {
return c.buildBlockingRequest()
}
return nil, fmt.Errorf("no strategy configured")
}
func (c *Config) buildDynamicRequest() (*http.Request, error) {
if c.Dynamic == nil {
return nil, fmt.Errorf("dynamic config is nil")
}
request, err := http.NewRequest("GET", fmt.Sprintf("%s/api/strategies/dynamic", c.SablierURL), nil)
if err != nil {
return nil, err
}
q := request.URL.Query()
if c.SessionDuration != nil {
q.Add("session_duration", c.SessionDuration.String())
}
for _, name := range c.Names {
q.Add("names", name)
}
if c.Group != "" {
q.Add("group", c.Group)
}
if c.Dynamic.DisplayName != "" {
q.Add("display_name", c.Dynamic.DisplayName)
}
if c.Dynamic.Theme != "" {
q.Add("theme", c.Dynamic.Theme)
}
if c.Dynamic.RefreshFrequency != nil {
q.Add("refresh_frequency", c.Dynamic.RefreshFrequency.String())
}
if c.Dynamic.ShowDetails != nil {
q.Add("show_details", strconv.FormatBool(*c.Dynamic.ShowDetails))
}
request.URL.RawQuery = q.Encode()
return request, nil
}
func (c *Config) buildBlockingRequest() (*http.Request, error) {
if c.Blocking == nil {
return nil, fmt.Errorf("blocking config is nil")
}
request, err := http.NewRequest("GET", fmt.Sprintf("%s/api/strategies/blocking", c.SablierURL), nil)
if err != nil {
return nil, err
}
q := request.URL.Query()
if c.SessionDuration != nil {
q.Add("session_duration", c.SessionDuration.String())
}
for _, name := range c.Names {
q.Add("names", name)
}
if c.Group != "" {
q.Add("group", c.Group)
}
if c.Blocking.Timeout != nil {
q.Add("timeout", c.Blocking.Timeout.String())
}
request.URL.RawQuery = q.Encode()
return request, nil
}