URLChecker.php
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<?php
// Copyright 2004-present Facebook. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
namespace Facebook\WebDriver\Net;
use Exception;
use Facebook\WebDriver\Exception\TimeOutException;
class URLChecker {
const POLL_INTERVAL_MS = 500;
const CONNECT_TIMEOUT_MS = 500;
public function waitUntilAvailable($timeout_in_ms, $url) {
$end = microtime(true) + $timeout_in_ms / 1000;
while ($end > microtime(true)) {
if ($this->getHTTPResponseCode($timeout_in_ms, $url) === 200) {
return $this;
}
usleep(self::POLL_INTERVAL_MS);
}
throw new TimeOutException(sprintf(
"Timed out waiting for %s to become available after %d ms.",
$url,
$timeout_in_ms
));
}
public function waitUntilUnavailable($timeout_in_ms, $url) {
$end = microtime(true) + $timeout_in_ms / 1000;
while ($end > microtime(true)) {
if ($this->getHTTPResponseCode($timeout_in_ms, $url) !== 200) {
return $this;
}
usleep(self::POLL_INTERVAL_MS);
}
throw new TimeOutException(sprintf(
"Timed out waiting for %s to become unavailable after %d ms.",
$url,
$timeout_in_ms
));
}
private function getHTTPResponseCode($timeout_in_ms, $url) {
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT_MS, self::CONNECT_TIMEOUT_MS);
// There is a PHP bug in some versions which didn't define the constant.
curl_setopt(
$ch,
156, // CURLOPT_CONNECTTIMEOUT_MS
self::CONNECT_TIMEOUT_MS
);
$code = null;
try {
curl_exec($ch);
$info = curl_getinfo($ch);
$code = $info['http_code'];
} catch (Exception $e) {
}
curl_close($ch);
return $code;
}
}