Sending Attachment through fb-messenger-cli

sendAttachment.js

    // Send an attachment in a thread
    //   recipient: Url name of recipient, also called vanity (eg: alexandre.rose)
    //   recipientId : Facebook numeric id of recipient. Can be a person or a thread
    //   path : path of the file
    // callback(err) does not get any data
    sendAttachment(recipient, recipientId, path, callback) {
      const recipientUrl = `${this.baseUrl  }/t/${  recipient}`; // Your recipient;
      const utcTimestamp = new Date().getTime();
      const localTime = new Date().toLocaleTimeString().replace(/\s+/g, '').toLowerCase();
      const messageId = Math.floor(Math.random() * Number.MAX_SAFE_INTEGER);

      request.post("https://upload.messenger.com/ajax/mercury/upload.php", {
          headers: {
              'origin': 'https://www.messenger.com',
              'accept-encoding': 'gzip, deflate',
              'x-msgr-region': 'ATN',
              'accept-language': 'en-US,en;q=0.8',
              'user-agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36',
              'content-type': 'multipart/form-data; boundary=----WebKitFormBoundary',
              'accept': '*/*',
              'referer': recipientUrl,
              'cookie': this.cookie,
              'authority': 'www.messenger.com',
          },
          formData: {
              '__a': '1',
              '__be': '1',
              '__dyn': '7AzkXh8Z398jgDxKy1l0BwRyaF3oyfJLFwgoqwWhEoyUnwgU9GGEcVovkwy3eE99XDG4UiwExW14DwPxSFEW2O9xicG4EnwkUC9z8Kew',
              '__pc': 'EXP1:messengerdotcom_pkg',
              '__req': '2q',
              '__rev': '2335431',
              '__user': this.userId,
              'dpr': '1.5',
              'fb_dtsg': this.fbdtsg,
              'jazoest': '21948',
              'upload': fs.createReadStream(path),
          },
          gzip: true,
      }, (err, res, body) => {
          if (err) {
              callback(err);
              return;
          }
          let bodyJson = JSON.parse(body.replace('for (;;);', ''));
          let imageId = bodyJson.payload.metadata[0].image_id;

          request.post("https://www.messenger.com/messaging/send/?dpr=1", {
              headers: {
                  'origin': 'https://www.messenger.com',
                  'accept-encoding': 'gzip, deflate',
                  'x-msgr-region': 'ATN',
                  'accept-language': 'en-US,en;q=0.8',
                  'user-agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36',
                  'content-type': 'application/x-www-form-urlencoded',
                  'accept': '*/*',
                  'referer': recipientUrl,
                  'cookie': this.cookie,
                  'authority': 'www.messenger.com'
              },
              formData: {
                  'action_type': 'ma-type:user-generated-message',
                  'author': `fbid:${this.userId}`,
                  'timestamp': utcTimestamp,
                  'timestamp_absolute': 'Today',
                  'timestamp_relative': localTime,
                  'timestamp_time_passed': '0',
                  'is_unread': 'false',
                  'is_forward': 'false',
                  'is_filtered_content': 'false',
                  'is_filtered_content_bh': 'false',
                  'is_filtered_content_account': 'false',
                  'is_filtered_content_quasar': 'false',
                  'is_filtered_content_invalid_app': 'false',
                  'is_spoof_warning': 'false',
                  'source': 'source:messenger:web',
                  'has_attachment': 'true',
                  'image_ids[0]': imageId,
                  'specific_to_list][0]': `fbid:${recipientId}`,
                  'specific_to_list[1]': `fbid:${this.userId}`,
                  'status': '0',
                  'offline_threading_id': messageId,
                  'message_id': messageId,
                  'ephemeral_ttl_mode': '0',
                  'manual_retry_cnt': '0',
                  'other_user_fbid': recipientId,
                  'client': 'mercury',
                  '__user': this.userId,
                  '__a': '1',
                  '__req': '2q',
                  '__be': '0',
                  '__pc': 'EXP1:messengerdotcom_pkg',
                  'fb_dtsg': this.fbdtsg,
                  'ttstamp': '265817073691196867855211811758658172458277511215256110114',
                  '__rev': '2335431'
              }
          }, (err) => {
              if (err) {
                  callback(err);
              }
              callback();
          });
      });
    }