-
Notifications
You must be signed in to change notification settings - Fork 291
/
slack.go
212 lines (183 loc) · 6.54 KB
/
slack.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
// Copyright (c) 2019 InfraCloud Technologies
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
package bot
import (
"strings"
"github.com/infracloudio/botkube/pkg/config"
"github.com/infracloudio/botkube/pkg/execute"
"github.com/infracloudio/botkube/pkg/log"
"github.com/slack-go/slack"
)
// SlackBot listens for user's message, execute commands and sends back the response
type SlackBot struct {
Token string
AllowKubectl bool
RestrictAccess bool
ClusterName string
ChannelName string
SlackURL string
BotID string
DefaultNamespace string
}
// slackMessage contains message details to execute command and send back the result
type slackMessage struct {
Event *slack.MessageEvent
BotID string
Request string
Response string
IsAuthChannel bool
RTM *slack.RTM
SlackClient *slack.Client
}
// NewSlackBot returns new Bot object
func NewSlackBot(c *config.Config) Bot {
return &SlackBot{
Token: c.Communications.Slack.Token,
AllowKubectl: c.Settings.Kubectl.Enabled,
RestrictAccess: c.Settings.Kubectl.RestrictAccess,
ClusterName: c.Settings.ClusterName,
ChannelName: c.Communications.Slack.Channel,
DefaultNamespace: c.Settings.Kubectl.DefaultNamespace,
}
}
// Start starts the slacknot RTM connection and listens for messages
func (b *SlackBot) Start() {
var botID string
api := slack.New(b.Token)
if len(b.SlackURL) != 0 {
api = slack.New(b.Token, slack.OptionAPIURL(b.SlackURL))
botID = b.BotID
} else {
authResp, err := api.AuthTest()
if err != nil {
log.Fatal(err)
}
botID = authResp.UserID
}
RTM := api.NewRTM()
go RTM.ManageConnection()
for msg := range RTM.IncomingEvents {
switch ev := msg.Data.(type) {
case *slack.ConnectedEvent:
log.Info("BotKube connected to Slack!")
case *slack.MessageEvent:
// Skip if message posted by BotKube
if ev.User == botID {
continue
}
sm := slackMessage{
Event: ev,
BotID: botID,
RTM: RTM,
SlackClient: api,
}
sm.HandleMessage(b)
case *slack.RTMError:
log.Errorf("Slack RMT error: %+v", ev.Error())
case *slack.ConnectionErrorEvent:
log.Errorf("Slack connection error: %+v", ev.Error())
case *slack.IncomingEventError:
log.Errorf("Slack incoming event error: %+v", ev.Error())
case *slack.OutgoingErrorEvent:
log.Errorf("Slack outgoing event error: %+v", ev.Error())
case *slack.UnmarshallingErrorEvent:
log.Errorf("Slack unmarshalling error: %+v", b.stripUnmarshallingErrEventDetails(ev.Error()))
case *slack.RateLimitedError:
log.Errorf("Slack rate limiting error: %+v", ev.Error())
case *slack.InvalidAuthEvent:
log.Error("Invalid Credentials")
return
default:
}
}
}
// Temporary workaround until the PR is merged: https://github.com/slack-go/slack/pull/1067
// There are just two cases when the full event details are concatenated with the error message: https://github.com/slack-go/slack/blob/v0.10.3/websocket_managed_conn.go#L474-L492
// Also, we need keep the JSON unmarshal error intact: https://github.com/slack-go/slack/blob/v0.10.3/websocket_managed_conn.go#L405
func (b *SlackBot) stripUnmarshallingErrEventDetails(errMessage string) string {
const errMsgSeparator = ": "
const prefix = "RTM Error"
if !strings.HasPrefix(errMessage, prefix) {
return errMessage
}
// has prefix, so let's split the message into parts
msgParts := strings.Split(errMessage, errMsgSeparator)
if len(msgParts) < 3 {
// impossible with current version of the dependency
return errMessage
}
return strings.Join(msgParts[:2], errMsgSeparator)
}
func (sm *slackMessage) HandleMessage(b *SlackBot) {
// Check if message posted in authenticated channel
info, err := sm.SlackClient.GetConversationInfo(sm.Event.Channel, true)
if err == nil {
if info.IsChannel || info.IsPrivate {
// Message posted in a channel
// Serve only if starts with mention
if !strings.HasPrefix(sm.Event.Text, "<@"+sm.BotID+">") {
return
}
// Serve only if current channel is in config
if b.ChannelName == info.Name {
sm.IsAuthChannel = true
}
}
}
// Serve only if current channel is in config
if b.ChannelName == sm.Event.Channel {
sm.IsAuthChannel = true
}
// Trim the @BotKube prefix
sm.Request = strings.TrimPrefix(sm.Event.Text, "<@"+sm.BotID+">")
e := execute.NewDefaultExecutor(sm.Request, b.AllowKubectl, b.RestrictAccess, b.DefaultNamespace,
b.ClusterName, config.SlackBot, b.ChannelName, sm.IsAuthChannel)
sm.Response = e.Execute()
sm.Send()
}
func (sm *slackMessage) Send() {
log.Debugf("Slack incoming Request: %s", sm.Request)
log.Debugf("Slack Response: %s", sm.Response)
if len(sm.Response) == 0 {
log.Infof("Invalid request. Dumping the response. Request: %s", sm.Request)
return
}
// Upload message as a file if too long
if len(sm.Response) >= 3990 {
params := slack.FileUploadParameters{
Filename: sm.Request,
Title: sm.Request,
Content: sm.Response,
Channels: []string{sm.Event.Channel},
}
_, err := sm.RTM.UploadFile(params)
if err != nil {
log.Error("Error in uploading file:", err)
}
return
}
var options = []slack.MsgOption{slack.MsgOptionText(formatCodeBlock(sm.Response), false), slack.MsgOptionAsUser(true)}
//if the message is from thread then add an option to return the response to the thread
if sm.Event.ThreadTimestamp != "" {
options = append(options, slack.MsgOptionTS(sm.Event.ThreadTimestamp))
}
if _, _, err := sm.RTM.PostMessage(sm.Event.Channel, options...); err != nil {
log.Error("Error in sending message:", err)
}
}