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
|
// Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
package model
import (
"encoding/json"
"net/http"
"github.com/gorilla/websocket"
)
const (
SOCKET_MAX_MESSAGE_SIZE_KB = 8 * 1024 // 8KB
)
type WebSocketClient struct {
Url string // The location of the server like "ws://localhost:8065"
ApiUrl string // The api location of the server like "ws://localhost:8065/api/v3"
ConnectUrl string // The websocket URL to connect to like "ws://localhost:8065/api/v3/path/to/websocket"
Conn *websocket.Conn // The WebSocket connection
AuthToken string // The token used to open the WebSocket
Sequence int64 // The ever-incrementing sequence attached to each WebSocket action
EventChannel chan *WebSocketEvent
ResponseChannel chan *WebSocketResponse
ListenError *AppError
}
// NewWebSocketClient constructs a new WebSocket client with convenience
// methods for talking to the server.
func NewWebSocketClient(url, authToken string) (*WebSocketClient, *AppError) {
return NewWebSocketClientWithDialer(websocket.DefaultDialer, url, authToken)
}
// NewWebSocketClientWithDialer constructs a new WebSocket client with convenience
// methods for talking to the server using a custom dialer.
func NewWebSocketClientWithDialer(dialer *websocket.Dialer, url, authToken string) (*WebSocketClient, *AppError) {
conn, _, err := dialer.Dial(url+API_URL_SUFFIX_V3+"/users/websocket", nil)
if err != nil {
return nil, NewAppError("NewWebSocketClient", "model.websocket_client.connect_fail.app_error", nil, err.Error(), http.StatusInternalServerError)
}
client := &WebSocketClient{
url,
url + API_URL_SUFFIX_V3,
url + API_URL_SUFFIX_V3 + "/users/websocket",
conn,
authToken,
1,
make(chan *WebSocketEvent, 100),
make(chan *WebSocketResponse, 100),
nil,
}
client.SendMessage(WEBSOCKET_AUTHENTICATION_CHALLENGE, map[string]interface{}{"token": authToken})
return client, nil
}
// NewWebSocketClient4 constructs a new WebSocket client with convenience
// methods for talking to the server. Uses the v4 endpoint.
func NewWebSocketClient4(url, authToken string) (*WebSocketClient, *AppError) {
return NewWebSocketClient4WithDialer(websocket.DefaultDialer, url, authToken)
}
// NewWebSocketClient4WithDialer constructs a new WebSocket client with convenience
// methods for talking to the server using a custom dialer. Uses the v4 endpoint.
func NewWebSocketClient4WithDialer(dialer *websocket.Dialer, url, authToken string) (*WebSocketClient, *AppError) {
conn, _, err := dialer.Dial(url+API_URL_SUFFIX+"/websocket", nil)
if err != nil {
return nil, NewAppError("NewWebSocketClient4", "model.websocket_client.connect_fail.app_error", nil, err.Error(), http.StatusInternalServerError)
}
client := &WebSocketClient{
url,
url + API_URL_SUFFIX,
url + API_URL_SUFFIX + "/websocket",
conn,
authToken,
1,
make(chan *WebSocketEvent, 100),
make(chan *WebSocketResponse, 100),
nil,
}
client.SendMessage(WEBSOCKET_AUTHENTICATION_CHALLENGE, map[string]interface{}{"token": authToken})
return client, nil
}
func (wsc *WebSocketClient) Connect() *AppError {
return wsc.ConnectWithDialer(websocket.DefaultDialer)
}
func (wsc *WebSocketClient) ConnectWithDialer(dialer *websocket.Dialer) *AppError {
var err error
wsc.Conn, _, err = dialer.Dial(wsc.ConnectUrl, nil)
if err != nil {
return NewAppError("Connect", "model.websocket_client.connect_fail.app_error", nil, err.Error(), http.StatusInternalServerError)
}
wsc.EventChannel = make(chan *WebSocketEvent, 100)
wsc.ResponseChannel = make(chan *WebSocketResponse, 100)
wsc.SendMessage(WEBSOCKET_AUTHENTICATION_CHALLENGE, map[string]interface{}{"token": wsc.AuthToken})
return nil
}
func (wsc *WebSocketClient) Close() {
wsc.Conn.Close()
}
func (wsc *WebSocketClient) Listen() {
go func() {
defer func() {
wsc.Conn.Close()
close(wsc.EventChannel)
close(wsc.ResponseChannel)
}()
for {
var rawMsg json.RawMessage
var err error
if _, rawMsg, err = wsc.Conn.ReadMessage(); err != nil {
if !websocket.IsCloseError(err, websocket.CloseNormalClosure, websocket.CloseNoStatusReceived) {
wsc.ListenError = NewAppError("NewWebSocketClient", "model.websocket_client.connect_fail.app_error", nil, err.Error(), http.StatusInternalServerError)
}
return
}
var event WebSocketEvent
if err := json.Unmarshal(rawMsg, &event); err == nil && event.IsValid() {
wsc.EventChannel <- &event
continue
}
var response WebSocketResponse
if err := json.Unmarshal(rawMsg, &response); err == nil && response.IsValid() {
wsc.ResponseChannel <- &response
continue
}
}
}()
}
func (wsc *WebSocketClient) SendMessage(action string, data map[string]interface{}) {
req := &WebSocketRequest{}
req.Seq = wsc.Sequence
req.Action = action
req.Data = data
wsc.Sequence++
wsc.Conn.WriteJSON(req)
}
// UserTyping will push a user_typing event out to all connected users
// who are in the specified channel
func (wsc *WebSocketClient) UserTyping(channelId, parentId string) {
data := map[string]interface{}{
"channel_id": channelId,
"parent_id": parentId,
}
wsc.SendMessage("user_typing", data)
}
// GetStatuses will return a map of string statuses using user id as the key
func (wsc *WebSocketClient) GetStatuses() {
wsc.SendMessage("get_statuses", nil)
}
// GetStatusesByIds will fetch certain user statuses based on ids and return
// a map of string statuses using user id as the key
func (wsc *WebSocketClient) GetStatusesByIds(userIds []string) {
data := map[string]interface{}{
"user_ids": userIds,
}
wsc.SendMessage("get_statuses_by_ids", data)
}
|
