https://github.com/euskadi31/go-sse

Server Sent Events for Go
https://github.com/euskadi31/go-sse

go golang golang-library server-sent-events sse

Last synced: 3 months ago
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Server Sent Events for Go

• Host: GitHub
• URL: https://github.com/euskadi31/go-sse
• Owner: euskadi31
• License: mit
• Created: 2017-09-15T19:40:18.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2025-03-17T08:50:38.000Z (3 months ago)
• Last Synced: 2025-03-17T09:42:47.854Z (3 months ago)
• Topics: go, golang, golang-library, server-sent-events, sse
• Language: Go
• Size: 48.8 KB
• Stars: 8
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

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README

        
Server Sent Events for Go [![Last release](https://img.shields.io/github/release/euskadi31/go-sse.svg)](https://github.com/euskadi31/go-sse/releases/latest) [![Documentation](https://godoc.org/github.com/euskadi31/go-sse?status.svg)](https://godoc.org/github.com/euskadi31/go-sse)

=========================

[![Go Report Card](https://goreportcard.com/badge/github.com/euskadi31/go-sse)](https://goreportcard.com/report/github.com/euskadi31/go-sse)

| Branch  | Status | Coverage |

|---------|--------|----------|

| master  | [![Build Status](https://img.shields.io/travis/euskadi31/go-sse/master.svg)](https://travis-ci.org/euskadi31/go-sse) | [![Coveralls](https://img.shields.io/coveralls/euskadi31/go-sse/master.svg)](https://coveralls.io/github/euskadi31/go-sse?branch=master) |

Golang Server Sent Events server

## Example

### Server

```go

package main

import (

	"fmt"

	"log"

	"net/http"

	"strconv"

	"time"

	"github.com/euskadi31/go-sse"

)

func main() {

	serve := sse.NewServer(func(rw sse.ResponseWriter, r *http.Request) {

		tickChan := time.NewTicker(time.Second * 2).C

		// recovery

		lastID := r.Header.Get(sse.LastEventID)

		if lastID != "" {

			log.Printf("Recovery with ID: %s\n", lastID)

		}

		for {

			select {

			case t := <-tickChan:

				eventString := fmt.Sprintf("the time is %v", t)

				log.Println("Send event...")

				rw.Send(&sse.MessageEvent{

					ID:   strconv.Itoa(int(t.Unix())),

					Data: []byte(eventString),

				})

			case <-r.Context().Done():

				log.Println("Done")

				return

			}

		}

	})

	serve.SetRetry(time.Second * 5)

	http.Handle("/events", serve)

	log.Panic(http.ListenAndServe(":1337", nil))

}

```

### Client

```js

var client = new EventSource("http://localhost:1337/events");

client.onmessage = (msg) => {

    console.log(msg);

};

```

## License

go-sse is licensed under [the MIT license](LICENSE.md).