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February 21, 2016 07:20
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Complete server-send events (event source) example in Go (golang)
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>event source test</title> | |
| </head> | |
| <body> | |
| <div id="events"> | |
| </div> | |
| <script type="text/javascript"> | |
| console.log("hello") | |
| var source = new EventSource("//localhost:9000/events", { withCredentials: true }); | |
| source.onmessage = function(e) { | |
| console.log(e); | |
| var elem = document.createElement("div"); | |
| elem.innerHTML = "event: " + e.data; | |
| events.appendChild(elem); | |
| window.last = e; | |
| }; | |
| source.onerror = function(err) { | |
| console.warn(err); | |
| }; | |
| source.onclose = function(err) { | |
| console.info("closed", err); | |
| }; | |
| setTimeout(function() { | |
| source.close(); | |
| }, 5000) | |
| </script> | |
| </body> | |
| </html> |
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| package main | |
| import ( | |
| "log" | |
| "net/http" | |
| "strconv" | |
| "time" | |
| "gopkg.in/antage/eventsource.v1" | |
| ) | |
| func main() { | |
| es := eventsource.New(nil, nil) | |
| defer es.Close() | |
| http.Handle("/events", es) | |
| go func() { | |
| id := 1 | |
| for { | |
| es.SendEventMessage("tick", "", strconv.Itoa(id)) | |
| id++ | |
| time.Sleep(1 * time.Second) | |
| } | |
| }() | |
| http.Handle("/", http.FileServer(http.Dir("."))) | |
| log.Fatal(http.ListenAndServe(":9000", nil)) | |
| } |
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