use Onoi\HttpRequest\HttpRequest;
use Onoi\HttpRequest\Exception\BadHttpResponseException;
use Onoi\HttpRequest\Exception\HttpConnectionException;

class Foo {

	private $httpRequest = null;

	public function __constructor( HttpRequest $httpRequest ) {
		$this->httpRequest = $httpRequest;
	}

	public function makeHttpRequestTo( $url ) {

		$this->httpRequest->setOption( CURLOPT_URL, $url );

		if ( !$this->httpRequest->ping() ) {
			throw new HttpConnectionException( "Couldn't connect" );
		}

		$this->httpRequest->setOption( CURLOPT_RETURNTRANSFER, true );

		$this->httpRequest->setOption( CURLOPT_HTTPHEADER, array(
			'Accept: application/x-turtle'
		) );

		$response = $this->httpRequest->execute();

		if ( $this->httpRequest->getLastErrorCode() == 0 ) {
			return $response;
		}

		throw new BadHttpResponseException( $this->httpRequest );
	}
}

$httpRequestFactory = new HttpRequestFactory();

$instance = new Foo( $httpRequestFactory->newCurlRequest() );
$instance->makeHttpRequestTo( 'http://example.org' );

OR

$cacheFactory = new CacheFactory();

$compositeCache = $cacheFactory->newCompositeCache( array(
	$cacheFactory->newFixedInMemoryLruCache( 500 ),
	$cacheFactory->newDoctrineCache( new \Doctrine\Common\Cache\RedisCache() )
) );

$httpRequestFactory = new HttpRequestFactory( $compositeCache );

$cachedRequest = $httpRequestFactory->newCachedCurlRequest();
$cachedRequest->setExpiryInSeconds( 60 * 60 );

$instance = new Foo( $cachedRequest );
$instance->makeHttpRequestTo( 'http://example.org' );