Server-sent events (SSE) is a technology where a browser receives automatic updates from a server via HTTP connection. It is not websockets. Learn more.
62 |The chat and the charts data is provided in realtime using the SSE implementation of Gin Framework.
63 || Nick | 70 |Message | 71 |
|---|
102 | ◼︎ Users
103 | ◼︎ Inbound messages / sec
104 | ◼︎ Outbound messages / sec
105 |
116 |
117 | 118 |
119 | ◼︎ Heap bytes
120 | ◼︎ Stack bytes
121 |
126 |
127 | 128 |
129 | ◼︎ Mallocs / sec
130 | ◼︎ Frees / sec
131 |
func streamRoom(c *gin.Context) {
145 | roomid := c.ParamValue("roomid")
146 | listener := openListener(roomid)
147 | statsTicker := time.NewTicker(1 * time.Second)
148 | defer closeListener(roomid, listener)
149 | defer statsTicker.Stop()
150 |
151 | c.Stream(func(w io.Writer) bool {
152 | select {
153 | case msg := <-listener:
154 | c.SSEvent("message", msg)
155 | case <-statsTicker.C:
156 | c.SSEvent("stats", Stats())
157 | }
158 | return true
159 | })
160 | }function StartSSE(roomid) {
165 | var source = new EventSource('/stream/'+roomid);
166 | source.addEventListener('message', newChatMessage, false);
167 | source.addEventListener('stats', stats, false);
168 | }import "github.com/manucorporat/sse"
175 |
176 | func httpHandler(w http.ResponseWriter, req *http.Request) {
177 | // data can be a primitive like a string, an integer or a float
178 | sse.Encode(w, sse.Event{
179 | Event: "message",
180 | Data: "some data\nmore data",
181 | })
182 |
183 | // also a complex type, like a map, a struct or a slice
184 | sse.Encode(w, sse.Event{
185 | Id: "124",
186 | Event: "message",
187 | Data: map[string]interface{}{
188 | "user": "manu",
189 | "date": time.Now().Unix(),
190 | "content": "hi!",
191 | },
192 | })
193 | }event: message
195 | data: some data\\nmore data
196 |
197 | id: 124
198 | event: message
199 | data: {"content":"hi!","date":1431540810,"user":"manu"}
200 |