Slack Group / DM chat download script Js

download_chat.js

const downloadSlackHistory = (cursor, channel, token, {ignore_replies, include_pin_count, limit, inclusive, no_user_profile, workspace_name}) => fetchJson(`https://${workspace_name}.slack.com/api/conversations.history?cursor=${cursor ? cursor: ''}`, {
  "headers": {
    "accept": "*/*",
    "accept-language": "en-GB,en-US;q=0.9,en;q=0.8",
    "cache-control": "no-cache",
    "content-type": "multipart/form-data; boundary=----WebKitFormBoundaryB9uCttsJARlaTNGJ",
    "pragma": "no-cache",
    "sec-ch-ua": "\"Google Chrome\";v=\"87\", \" Not;A Brand\";v=\"99\", \"Chromium\";v=\"87\"",
    "sec-ch-ua-mobile": "?0",
    "sec-fetch-dest": "empty",
    "sec-fetch-mode": "cors",
    "sec-fetch-site": "same-site"
  },
  "referrerPolicy": "no-referrer",
  "body": `------WebKitFormBoundaryB9uCttsJARlaTNGJ\r\nContent-Disposition: form-data; name=\"channel\"\r\n\r\n${channel}\r\n------WebKitFormBoundaryB9uCttsJARlaTNGJ\r\nContent-Disposition: form-data; name=\"limit\"\r\n\r\n${limit}\r\n------WebKitFormBoundaryB9uCttsJARlaTNGJ\r\nContent-Disposition: form-data; name=\"ignore_replies\"\r\n\r\n${ignore_replies}\r\n------WebKitFormBoundaryB9uCttsJARlaTNGJ\r\nContent-Disposition: form-data; name=\"include_pin_count\"\r\n\r\n${include_pin_count}\r\n------WebKitFormBoundaryB9uCttsJARlaTNGJ\r\nContent-Disposition: form-data; name=\"inclusive\"\r\n\r\n${inclusive}\r\n------WebKitFormBoundaryB9uCttsJARlaTNGJ\r\nContent-Disposition: form-data; name=\"no_user_profile\"\r\n\r\n${no_user_profile}\r\n------WebKitFormBoundaryB9uCttsJARlaTNGJ\r\nContent-Disposition: form-data; name=\"token\"\r\n\r\n${token}\r\n------WebKitFormBoundaryB9uCttsJARlaTNGJ\r\nContent-Disposition: form-data; name=\"_x_reason\"\r\n\r\nmessage-pane/requestHistory\r\n------WebKitFormBoundaryB9uCttsJARlaTNGJ\r\nContent-Disposition: form-data; name=\"_x_mode\"\r\n\r\nonline\r\n------WebKitFormBoundaryB9uCttsJARlaTNGJ\r\nContent-Disposition: form-data; name=\"_x_sonic\"\r\n\r\ntrue\r\n------WebKitFormBoundaryB9uCttsJARlaTNGJ--\r\n`,
  "method": "POST",
  "mode": "cors",
  "credentials": "include"
})

const fetchJson = async (...args) => (await fetch(...args)).json();

async function downloadSlackHistoryWrapper(...args) {
  const json = await downloadSlackHistory(...args);
  msg = msg.concat(json.messages);
  if (json.response_metadata&& json.response_metadata.next_cursor) {
    const _args = [json.response_metadata.next_cursor, ...args.slice(1, args.length)]
    return downloadSlackHistoryWrapper(..._args);
  }
  return msg;
}

// main
const msgs = [];
downloadSlackHistory(null, ).then(msgs => {
  console.log('done')
  console.log(msgs);
  copy(msgs); // chrome copy function
})