Function waitForUrl

javascript/selenium-webdriver/http/util.js:112–161

* Polls a URL with GET requests until it returns a 2xx response or the * timeout expires. * @param {string} url The URL to poll. * @param {number} timeout How long to wait, in milliseconds. * @param {Promise=} opt_cancelToken A promise used as a cancellation signal: * if resolved before the

(url, timeout, opt_cancelToken)

 *     the given URL, or if the wait is cancelled.
 */
function waitForUrl(url, timeout, opt_cancelToken) {
  return new Promise((onResolve, onReject) => {
    let client = new HttpClient(url)
    let request = new HttpRequest('GET', '')
    let start = Date.now()

    let done = false
    let resolve = () => {
      done = true
      onResolve()
    }
    let reject = (err) => {
      done = true
      onReject(err)
    }

    if (opt_cancelToken) {
      opt_cancelToken.then((_) => reject(new CancellationError()))
    }

    testUrl()

    function testUrl() {
      client.send(request).then(onResponse, onError)
    }

    function onError() {
      if (Date.now() - start > timeout) {
        reject(Error('Timed out waiting for the URL to return 2xx: ' + url))
      } else {
        setTimeout(function () {
          if (!done) {
            testUrl()
          }
        }, 50)
      }
    }

    function onResponse(response) {
      if (done) {
        return
      }
      if (response.status > 199 && response.status < 300) {
        resolve()
        return
      }
      onError()
    }
  })
}

// PUBLIC API
module.exports.getStatus = getStatus