From ecb9d37b55f5c55545a2c0ec475e22d71bd4dcc8 Mon Sep 17 00:00:00 2001
From: herbrechtsmeier <stefan@herbrechtsmeier.net>
Date: Sat, 9 Mar 2013 11:39:20 +0100
Subject: [PATCH] request.php: add type check to the not empty check of a
 string

The not equal comparison (<>) of a variable with an empty string
could lead to false positive results as the compare do not check
the type and thereby could not make sure that the checked variable
is a string. The usage of the not identical comparison operator
(!==) make sure that the variable is a string and not empty.
---
 lib/request.php | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/lib/request.php b/lib/request.php
index 859276a12a..4d8380eb9a 100755
--- a/lib/request.php
+++ b/lib/request.php
@@ -14,7 +14,7 @@ class OC_Request {
 	private static function isOverwriteCondition($type = '') {
 		$regex = '/' . OC_Config::getValue('overwritecondaddr', '')  . '/';
 		return $regex === '//' or preg_match($regex, $_SERVER['REMOTE_ADDR']) === 1
-			or ($type <> 'protocol' and OC_Config::getValue('forcessl', false));
+			or ($type !== 'protocol' and OC_Config::getValue('forcessl', false));
 	}
 
 	/**
@@ -28,7 +28,7 @@ class OC_Request {
 		if(OC::$CLI) {
 			return 'localhost';
 		}
-		if(OC_Config::getValue('overwritehost', '')<>'' and self::isOverwriteCondition()) {
+		if(OC_Config::getValue('overwritehost', '') !== '' and self::isOverwriteCondition()) {
 			return OC_Config::getValue('overwritehost');
 		}
 		if (isset($_SERVER['HTTP_X_FORWARDED_HOST'])) {
@@ -53,7 +53,7 @@ class OC_Request {
 	* Returns the server protocol. It respects reverse proxy servers and load balancers
 	*/
 	public static function serverProtocol() {
-		if(OC_Config::getValue('overwriteprotocol', '')<>'' and self::isOverwriteCondition('protocol')) {
+		if(OC_Config::getValue('overwriteprotocol', '') !== '' and self::isOverwriteCondition('protocol')) {
 			return OC_Config::getValue('overwriteprotocol');
 		}
 		if (isset($_SERVER['HTTP_X_FORWARDED_PROTO'])) {
@@ -77,7 +77,7 @@ class OC_Request {
 	 */
 	public static function requestUri() {
 		$uri = isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : '';
-		if (OC_Config::getValue('overwritewebroot', '') <> '' and self::isOverwriteCondition()) {
+		if (OC_Config::getValue('overwritewebroot', '') !== '' and self::isOverwriteCondition()) {
 			$uri = self::scriptName() . substr($uri, strlen($_SERVER['SCRIPT_NAME']));
 		}
 		return $uri;
@@ -92,7 +92,7 @@ class OC_Request {
 	 */
 	public static function scriptName() {
 		$name = $_SERVER['SCRIPT_NAME'];
-		if (OC_Config::getValue('overwritewebroot', '') <> '' and self::isOverwriteCondition()) {
+		if (OC_Config::getValue('overwritewebroot', '') !== '' and self::isOverwriteCondition()) {
 			$serverroot = str_replace("\\", '/', substr(__DIR__, 0, -4));
 			$suburi = str_replace("\\", "/", substr(realpath($_SERVER["SCRIPT_FILENAME"]), strlen($serverroot)));
 			$name = OC_Config::getValue('overwritewebroot', '') . $suburi;