add support for basic auth for file_get_contents() in Feed::httpRequest() (#15)

Author: akamiya

src/Feed.php

@@ -220,11 +220,19 @@ private static function httpRequest($url, $user, $pass)
 				? $result
 				: false;
 
-		} elseif ($user === null && $pass === null) {
-			return file_get_contents($url);
-
 		} else {
-			throw new FeedException('PHP extension CURL is not loaded.');
+			$context = null;
+			if ($user !== null && $pass !== null) {
+				$options = array(
+					'http'=> array(
+						'method' => 'GET',
+						'header' => 'Authorization: Basic ' . base64_encode($user.":".$pass) . "\r\n"
+					)
+				);
+				$context = stream_context_create($options);
+			}
+
+			return file_get_contents($url, false, $context);
 		}
 	}