Pass a BrowserStack session ID to retrieve the HAR logs (provided "browserstack.networkLogs" = true is used)

har_logs.js

const https = require('https');
const { exec } = require('child_process');

function getHarLogs (url) {
  return new Promise ( (resolve, reject)=> {
    https.get(url, (res) => {
      if (res.statusCode !== 200){
          throw "ERROR unable to retrieve HAR logs from BrowserStack: StatusCode - " + res.statusCode;
      }
      res.setEncoding('utf8');
      var buffer = "";
      res.on('data', (harLogs) => {
        buffer += harLogs;
      });
      res.on('end', () => {
        resolve(buffer);
      });
    }).on('error', (err) => {
      console.error("error", err);
    });
  });
}

function getBrowserStackSessionLogs (sessionId) {
  return new Promise((resolve, reject) => {
    exec(`curl -u 'USERNAME:ACCESS_KEY' https://api.browserstack.com/automate/sessions/${sessionId}.json`, (error, stdout, stderr) => {
      if (error) {
        console.error(`exec error: ${error}`);
        reject(error);
      } 
      resolve(JSON.parse(stdout));
    }).on('error', (err) => {
      console.error(err);
      throw error;
    });
  });
}

// getHarLogs().then(result=> {console.log(result)}).catch(error=>{console.log("harlogs", error)});
getBrowserStackSessionLogs("<SESSION_ID>").then(result => { return getHarLogs(result.automation_session.har_logs_url) }).then(result => { console.log(result) }).catch(error => { console.log(error) });