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
|
//Package matterhook provides interaction with mattermost incoming/outgoing webhooks
package matterhook
import (
"bytes"
"crypto/tls"
"encoding/json"
"fmt"
"github.com/gorilla/schema"
"io"
"io/ioutil"
"log"
"net/http"
"strconv"
)
// OMessage for mattermost incoming webhook. (send to mattermost)
type OMessage struct {
Channel string `json:"channel,omitempty"`
IconURL string `json:"icon_url,omitempty"`
IconEmoji string `json:"icon_emoji,omitempty"`
UserName string `json:"username,omitempty"`
Text string `json:"text"`
}
// IMessage for mattermost outgoing webhook. (received from mattermost)
type IMessage struct {
Token string `schema:"token"`
TeamID string `schema:"team_id"`
TeamDomain string `schema:"team_domain"`
ChannelID string `schema:"channel_id"`
ServiceID string `schema:"service_id"`
ChannelName string `schema:"channel_name"`
Timestamp string `schema:"timestamp"`
UserID string `schema:"user_id"`
UserName string `schema:"user_name"`
Text string `schema:"text"`
TriggerWord string `schema:"trigger_word"`
}
// Client for Mattermost.
type Client struct {
url string
In chan IMessage
Out chan OMessage
httpclient *http.Client
Config
}
// Config for client.
type Config struct {
Port int // Port to listen on.
Token string // Only allow this token from Mattermost. (Allow everything when empty)
InsecureSkipVerify bool // disable certificate checking
}
// New Mattermost client.
func New(url string, config Config) *Client {
c := &Client{url: url, In: make(chan IMessage), Out: make(chan OMessage), Config: config}
if c.Port == 0 {
c.Port = 9999
}
tr := &http.Transport{
TLSClientConfig: &tls.Config{InsecureSkipVerify: config.InsecureSkipVerify},
}
c.httpclient = &http.Client{Transport: tr}
go c.StartServer()
return c
}
// StartServer starts a webserver listening for incoming mattermost POSTS.
func (c *Client) StartServer() {
mux := http.NewServeMux()
mux.Handle("/", c)
log.Printf("Listening on http://0.0.0.0:%v...\n", c.Port)
if err := http.ListenAndServe((":" + strconv.Itoa(c.Port)), mux); err != nil {
log.Fatal(err)
}
}
// ServeHTTP implementation.
func (c *Client) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if r.Method != "POST" {
log.Println("invalid " + r.Method + " connection from " + r.RemoteAddr)
http.NotFound(w, r)
return
}
msg := IMessage{}
err := r.ParseForm()
if err != nil {
log.Println(err)
http.NotFound(w, r)
return
}
defer r.Body.Close()
decoder := schema.NewDecoder()
err = decoder.Decode(&msg, r.PostForm)
if err != nil {
log.Println(err)
http.NotFound(w, r)
return
}
if msg.Token == "" {
log.Println("no token from " + r.RemoteAddr)
http.NotFound(w, r)
return
}
if c.Token != "" {
if msg.Token != c.Token {
log.Println("invalid token " + msg.Token + " from " + r.RemoteAddr)
http.NotFound(w, r)
return
}
}
c.In <- msg
}
// Receive returns an incoming message from mattermost outgoing webhooks URL.
func (c *Client) Receive() IMessage {
for {
select {
case msg := <-c.In:
return msg
}
}
}
// Send sends a msg to mattermost incoming webhooks URL.
func (c *Client) Send(msg OMessage) error {
buf, err := json.Marshal(msg)
if err != nil {
return err
}
resp, err := c.httpclient.Post(c.url, "application/json", bytes.NewReader(buf))
if err != nil {
return err
}
defer resp.Body.Close()
// Read entire body to completion to re-use keep-alive connections.
io.Copy(ioutil.Discard, resp.Body)
if resp.StatusCode != 200 {
return fmt.Errorf("unexpected status code: %d", resp.StatusCode)
}
return nil
}
|
