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WebClient.php
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WebClient.php
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<?php
namespace helpers;
use Exception;
use Fossar\GuzzleTranscoder\GuzzleTranscoder;
use GuzzleHttp;
use GuzzleHttp\Subscriber\Log\LogSubscriber;
/**
* Helper class for web request
*
* @copyright Copyright (c) Tobias Zeising (http://www.aditu.de)
* @license GPLv3 (https://www.gnu.org/licenses/gpl-3.0.html)
* @author Alexandre Rossi <alexandre.rossi@gmail.com>
*/
class WebClient {
/** @var GuzzleHttp\Client */
private static $httpClient;
/**
* Provide a HTTP client for use by spouts
*
* @return GuzzleHttp\Client
*/
public static function getHttpClient() {
if (!isset(self::$httpClient)) {
$version = \F3::get('version');
$httpClient = new GuzzleHttp\Client([
'defaults' => [
'headers' => [
'User-Agent' => self::getUserAgent(),
]
]
]);
$httpClient->getEmitter()->attach(new GuzzleTranscoder());
if (\F3::get('logger_level') === 'DEBUG') {
$httpClient->getEmitter()->attach(new LogSubscriber(\F3::get('logger')));
}
self::$httpClient = $httpClient;
}
return self::$httpClient;
}
/**
* get the user agent to use for web based spouts
*
* @return string the user agent string for this spout
*/
public static function getUserAgent($agentInfo = null) {
$userAgent = 'Selfoss/' . \F3::get('version');
if (is_null($agentInfo)) {
$agentInfo = [];
}
$agentInfo[] = '+https://selfoss.aditu.de';
return $userAgent . ' (' . implode('; ', $agentInfo) . ')';
}
/**
* Retrieve content from url
*
* @param string $subagent Extra user agent info to use in the request
*
* @throws GuzzleHttp\Exception\RequestException When an error is encountered
* @throws Exception Unless 200 0K response is received
*
* @return string request data
*/
public static function request($url, $agentInfo = null) {
$http = self::getHttpClient();
$response = $http->get($url);
$data = (string) $response->getBody();
if ($response->getStatusCode() !== 200) {
throw new Exception(substr($data, 0, 512));
}
return $data;
}
}