bugfix: Restore support for windows machines.

Due to recent changes to fix the way we were building URLs (mixing what the 'baseurlpath' configuration option and the current URL, see #396), we introduced another bug by assuming file paths will always use slashes ('/'), which obviously is not true in Windows machines. This commit fixes SimpleSAML_Configuration::getBaseDir() and SimpleSAML\Utils\HTTP::getSelfURL() to take that into account.

This closes #414.

lib/SimpleSAML/Configuration.php

@@ -595,8 +595,8 @@ class SimpleSAML_Configuration
         $dir = $this->getString('basedir', null);
         if ($dir !== null) {
             // add trailing slash if it is missing
-            if (substr($dir, -1) !== '/') {
-                $dir .= '/';
+            if (substr($dir, -1) !== DIRECTORY_SEPARATOR) {
+                $dir .= DIRECTORY_SEPARATOR;
             }
 
             return $dir;
@@ -614,8 +614,8 @@ class SimpleSAML_Configuration
 
         $dir = dirname($dir);
 
-        // Add trailing slash
-        $dir .= '/';
+        // Add trailing directory separator
+        $dir .= DIRECTORY_SEPARATOR;
 
         return $dir;
     }

lib/SimpleSAML/Utils/HTTP.php

@@ -724,7 +724,11 @@ class HTTP
         $url = self::getBaseURL();
         $cfg = \SimpleSAML_Configuration::getInstance();
         $baseDir = $cfg->getBaseDir();
-        $rel_path = str_replace($baseDir.'www/', '', realpath($_SERVER['SCRIPT_FILENAME']));
+        $rel_path = str_replace(
+            DIRECTORY_SEPARATOR,
+            '/',
+            str_replace($baseDir.'www'.DIRECTORY_SEPARATOR, '', realpath($_SERVER['SCRIPT_FILENAME']))
+        );
         $pos = strpos($_SERVER['REQUEST_URI'], $rel_path) + strlen($rel_path);
         return $url.$rel_path.substr($_SERVER['REQUEST_URI'], $pos);
     }