CoffeeScript2でSlackの認証テスト 

# https://ja.ojit.com/so/slack/3498196
SLACK_USER_TOKEN = 'xoxp-881518928711-868191264403-00x0dfd0v1766-10458077c--36681ce0599334ca5'
SLACK_BOT_TOKEN = 'xoxb-881518928711-1609760895585-rfrigjirjirPECn47fgdfvf--ljIV'
BASE_URL = 'https://slack.com/api/'

headers = {'Authorization': "Bearer #{SLACK_BOT_TOKEN}"}
request = require('request')

postOptions =
  uri: BASE_URL + 'auth.test'
  method: 'POST'
  json: true
  headers: headers

# DEBUG
console.log BASE_URL + 'auth.test'

request postOptions, (error, response, body) ->
  if error
    console.log 'OOPPPPS....we hit an error in auth.test: ' + error
  else
    console.log 'auth.test response: ' + JSON.stringify(response)
  return
#res.send("Sent Test...check logs");

C:\Somewhere>.\node_modules\.bin\js2coffee auth-test.js > auth-test.coffee
C:\Somewhere>.\node_modules\.bin\coffee.cmd auth-test.coffee

Node.jsでSlackのauth.testを叩く 

// https://ja.ojit.com/so/slack/3498196

const SLACK_USER_TOKEN = 'xoxp-881518928711-868191264403-fffffffff66-10458077c9cd0df36681ce0599334ca5';
const SLACK_BOT_TOKEN = 'xoxb-881518928711-1609760895585ffffffffffffff3i4DPECn47tSFsVljIV';
const BASE_URL = 'https://slack.com/api/';

var headers = {
        'Authorization': `Bearer ${SLACK_USER_TOKEN}`
};

var request = require('request');
var postOptions = {
        uri: BASE_URL + 'auth.test',
        method: 'POST',
        json: true,
        headers: headers,
};

// DEBUG
console.log(uri);

request(postOptions, (error, response, body) => {
        if (error) {
                console.log("OOPPPPS....we hit an error in auth.test: " + error);
        } else {
                console.log("auth.test response: " + JSON.stringify(response));
        }
});
//res.send("Sent Test...check logs");

Node.jsでSlackにメッセージを投稿する(SlackAPI) 

// Post message to slack
// using request_promise
//
// 2020-12-24 (Thu.)
// Ryo Chiba

const request_promise = require("request-promise");

const SLACK_USER_TOKEN = 'xoxp-881518928711-868191264403-yyyyyyyyyyyyy6-10458077c9cd0df36681ce05
99334ca5';
const CHANNEL_ID = 'GSX2FOKA03';
const USER_NAME = 'poco';
const text = 'Node.js posting message to Slack...';


(async () => {
const res = await request_promise({
    uri: 'https://slack.com/api/chat.postMessage',
    method: 'POST',
    headers: {
        'content-type': 'application/x-www-form-urlencoded',
        'charset': 'utf-8'
    },
    form: {
        token: SLACK_USER_TOKEN,
        channel: CHANNEL_ID,
        username: USER_NAME,
        text: text
    },
    json: true
});

console.log(res);
})();

PythonでSlackにメッセージを投稿する(SlackAPI) 

#!/usr/bin/python3
# -*- coding:utf-8 -*-

# Post message to Slack
# using requests

# 2020-12-24 (Thu.)

import json
import requests

def slack_postmsg(url, token, channel, text):
        headers = {'Authorization': 'Bearer ' + token,
                'Content-Type': 'application/json; charset=utf-8'}
        payload = {'channel': channel, 'text': text, 'as_user': True,}
        req = requests.post(url, data=json.dumps(payload), headers=headers)
        print(req.text)

SLACKAPI_URL = 'https://slack.com/api/chat.postMessage'
SLACK_USER_TOKEN = "xoxp-881518928711-rrrrrrrrrrrrrrrrrrrr-xxxxxxxxxxx-10458077c9cd0df36681ce0599334ca5"
channel_id = 'GSX09FY83'
text = "message post from Python"

slack_postmsg(SLACKAPI_URL, SLACK_USER_TOKEN, channel_id, text)

実行例:
$ python3 post-write-msg.py
{"ok":true,"channel":"GSX2FKASJ","ts":"1608777828.001500","message":{"bot_id":"B01HK4MEUD8","type":"message","text":"message post from Python","user":"URJ5M7SBV","ts":"1608777828.001500","team":"TRXF8TALX","bot_profile":{"id":"B01HK4MEUD8","deleted":false,"name":"msg-cleaner","updated":1608770884,"app_id":"A01HXN8CAJV","icons":{"image_36":"https:\/\/a.slack-edge.com\/80588\/img\/plugins\/app\/bot_36.png","image_48":"https:\/\/a.slack-edge.com\/80588\/img\/plugins\/app\/bot_48.png","image_72":"https:\/\/a.slack-edge.com\/80588\/img\/plugins\/app\/service_72.png"},"team_id":"TRXF8TALX"}}}

PythonでSlackのメッセージを削除する(SlackAPI) 

#!/usr/bin/python3
# -*- coding:utf-8 -*-

# Delete Slack message (SlackAPI)

# 2020-12-24 (Thu.)

import json
import requests

# Define function
def slack_delmsg(url, token, channel, ts):
        headers = {'Authorization': 'Bearer ' + token,
                'Content-Type': 'application/json; charset=utf-8'}
        payload = {'channel': channel, 'ts': ts}
        req = requests.post(url, data=json.dumps(payload), headers=headers)
        print(req.text)

SLACKAPI_URL = 'https://slack.com/api/chat.delete'
SLACK_USER_TOKEN = "xoxp-1538991196854-xxxxxxxxxxxxx-yyyyyyyyyyyyy-9093aef89f0d6e9f21f23abc0xyzxyz"
channel_id = 'C01FZZ90F8'
ts_p = '1607327126.001000'

slack_delmsg(SLACKAPI_URL, SLACK_USER_TOKEN, channel_id, ts_p)