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
|
# melody
[](https://travis-ci.org/olahol/melody)
[](https://coveralls.io/r/olahol/melody)
[](https://godoc.org/github.com/olahol/melody)
> :notes: Minimalist websocket framework for Go.
Melody is websocket framework based on [github.com/gorilla/websocket](https://github.com/gorilla/websocket)
that abstracts away the tedious parts of handling websockets. It gets out of
your way so you can write real-time apps. Features include:
* [x] Clear and easy interface similar to `net/http` or Gin.
* [x] A simple way to broadcast to all or selected connected sessions.
* [x] Message buffers making concurrent writing safe.
* [x] Automatic handling of ping/pong and session timeouts.
* [x] Store data on sessions.
## Install
```bash
go get gopkg.in/olahol/melody.v1
```
## [Example: chat](https://github.com/olahol/melody/tree/master/examples/chat)
[](https://github.com/olahol/melody/tree/master/examples/chat)
Using [Gin](https://github.com/gin-gonic/gin):
```go
package main
import (
"github.com/gin-gonic/gin"
"gopkg.in/olahol/melody.v1"
"net/http"
)
func main() {
r := gin.Default()
m := melody.New()
r.GET("/", func(c *gin.Context) {
http.ServeFile(c.Writer, c.Request, "index.html")
})
r.GET("/ws", func(c *gin.Context) {
m.HandleRequest(c.Writer, c.Request)
})
m.HandleMessage(func(s *melody.Session, msg []byte) {
m.Broadcast(msg)
})
r.Run(":5000")
}
```
Using [Echo](https://github.com/labstack/echo):
```go
package main
import (
"github.com/labstack/echo"
"github.com/labstack/echo/engine/standard"
"github.com/labstack/echo/middleware"
"gopkg.in/olahol/melody.v1"
"net/http"
)
func main() {
e := echo.New()
m := melody.New()
e.Use(middleware.Logger())
e.Use(middleware.Recover())
e.GET("/", func(c echo.Context) error {
http.ServeFile(c.Response().(*standard.Response).ResponseWriter, c.Request().(*standard.Request).Request, "index.html")
return nil
})
e.GET("/ws", func(c echo.Context) error {
m.HandleRequest(c.Response().(*standard.Response).ResponseWriter, c.Request().(*standard.Request).Request)
return nil
})
m.HandleMessage(func(s *melody.Session, msg []byte) {
m.Broadcast(msg)
})
e.Run(standard.New(":5000"))
}
```
## [Example: gophers](https://github.com/olahol/melody/tree/master/examples/gophers)
[](https://github.com/olahol/melody/tree/master/examples/gophers)
```go
package main
import (
"github.com/gin-gonic/gin"
"gopkg.in/olahol/melody.v1"
"net/http"
"strconv"
"strings"
"sync"
)
type GopherInfo struct {
ID, X, Y string
}
func main() {
router := gin.Default()
mrouter := melody.New()
gophers := make(map[*melody.Session]*GopherInfo)
lock := new(sync.Mutex)
counter := 0
router.GET("/", func(c *gin.Context) {
http.ServeFile(c.Writer, c.Request, "index.html")
})
router.GET("/ws", func(c *gin.Context) {
mrouter.HandleRequest(c.Writer, c.Request)
})
mrouter.HandleConnect(func(s *melody.Session) {
lock.Lock()
for _, info := range gophers {
s.Write([]byte("set " + info.ID + " " + info.X + " " + info.Y))
}
gophers[s] = &GopherInfo{strconv.Itoa(counter), "0", "0"}
s.Write([]byte("iam " + gophers[s].ID))
counter += 1
lock.Unlock()
})
mrouter.HandleDisconnect(func(s *melody.Session) {
lock.Lock()
mrouter.BroadcastOthers([]byte("dis "+gophers[s].ID), s)
delete(gophers, s)
lock.Unlock()
})
mrouter.HandleMessage(func(s *melody.Session, msg []byte) {
p := strings.Split(string(msg), " ")
lock.Lock()
info := gophers[s]
if len(p) == 2 {
info.X = p[0]
info.Y = p[1]
mrouter.BroadcastOthers([]byte("set "+info.ID+" "+info.X+" "+info.Y), s)
}
lock.Unlock()
})
router.Run(":5000")
}
```
### [More examples](https://github.com/olahol/melody/tree/master/examples)
## [Documentation](https://godoc.org/github.com/olahol/melody)
## Contributors
* Ola Holmström (@olahol)
* Shogo Iwano (@shiwano)
* Matt Caldwell (@mattcaldwell)
* Heikki Uljas (@huljas)
* Robbie Trencheny (@robbiet480)
* yangjinecho (@yangjinecho)
## FAQ
If you are getting a `403` when trying to connect to your websocket you can [change allow all origin hosts](http://godoc.org/github.com/gorilla/websocket#hdr-Origin_Considerations):
```go
m := melody.New()
m.Upgrader.CheckOrigin = func(r *http.Request) bool { return true }
```
|
