Post a simple Slack message with Go using a bot

main.go

package main

// Created by Markus Tenghamn @ GoPHP.io
//
// Post a simple Slack message using a bot

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io/ioutil"
	"net/http"
)

type PostMessage struct {
	Channel string `json:"channel"`
	Text string `json:"text"`
}

func main() {
	// Slack endpoint for chat.postMessage
	url := "https://slack.com/api/chat.postMessage"
	token := "your-token"

	postMessage := &PostMessage{
		Channel: "#general",
		Text: "This is a test message from GoPHP.io",
	}

	b := new(bytes.Buffer)
	err := json.NewEncoder(b).Encode(postMessage)


	if err != nil {
		panic(err)
	}

	req, err := http.NewRequest("POST", url, b)
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("Authorization", "Bearer " + token)

	client := &http.Client{}
	resp, err := client.Do(req)
	if err != nil {
		panic(err)
	}

	body, _ := ioutil.ReadAll(resp.Body)
	fmt.Println("response Body:", string(body))
}