fixes #1897 - Installation: detects proxy headers and adds them to config/config.ini.php; update script will add them if not already configured

git-svn-id: http://dev.piwik.org/svn/trunk@3457 59fd770c-687e-43c8-a1e3-f5a4ff64c105

1 files changed, 100 insertions, 0 deletions

diff --git a/core/ProxyHeaders.php b/core/ProxyHeaders.php
new file mode 100644
index 0000000000..8116f49236
--- /dev/null
+++ b/core/ProxyHeaders.php
@@ -0,0 +1,100 @@
+<?php
+/**
+ * Piwik - Open source web analytics
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ * @version $Id$
+ *
+ * @category Piwik
+ * @package Piwik
+ */
+
+/**
+ * Proxy headers
+ *
+ * @package Piwik
+ */
+class Piwik_ProxyHeaders
+{
+	/**
+	 * Get protocol information, with the exception of HTTPS
+	 *
+	 * @return string protocol information
+	 */
+	public static function getProtocolInformation()
+	{
+		if(Piwik_Common::getRequestVar('clientProtocol', 'http', 'string') == 'https')
+		{
+			return 'https';
+		}
+
+		if(isset($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] == 443)
+		{
+			return 'SERVER_PORT=443';
+		}
+
+		if(isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && strtolower($_SERVER['HTTP_X_FORWARDED_PROTO']) == 'https')
+		{
+			return 'X-Forwarded-Proto';
+		}
+
+		if(isset($_SERVER['HTTP_X_FORWARDED_SCHEME']) && strtolower($_SERVER['HTTP_X_FORWARDED_SCHEME']) == 'https')
+		{
+			return 'X-Forwarded-Scheme';
+		}
+
+		if(isset($_SERVER['HTTP_X_URL_SCHEME']) && strtolower($_SERVER['HTTP_X_URL_SCHEME']) == 'https')
+		{
+			return 'X-Url-Scheme';
+		}
+
+		return null;
+	}
+
+	/**
+	 * Get headers present in the HTTP request
+	 *
+	 * @return array HTTP headers
+	 */
+	private static function getHeaders($recognizedHeaders)
+	{
+		$headers = array();
+
+		foreach($recognizedHeaders as $header)
+		{
+			if(isset($_SERVER[$header]))
+			{
+				$headers[] = $header;
+			}
+		}
+
+		return $headers;
+	}
+
+	/**
+	 * Detect proxy client headers
+	 *
+	 * @return array Proxy client HTTP headers
+	 */
+	public static function getProxyClientHeaders()
+	{
+		return self::getHeaders(array(
+			'HTTP_CF_CONNECTING_IP',
+			'HTTP_CLIENT_IP',
+			'HTTP_X_FORWARDED_FOR',
+		));
+	}
+
+	/**
+	 * Detect proxy host headers
+	 *
+	 * @return array Proxy host HTTP headers
+	 */
+	public static function getProxyHostHeaders()
+	{
+		return self::getHeaders(array(
+			'HTTP_X_FORWARDED_HOST',
+		));
+	}
+}