diff --git a/src/Symfony/Component/HttpFoundation/Request.php b/src/Symfony/Component/HttpFoundation/Request.php
index b868bd912c5ea..afab299767847 100644
--- a/src/Symfony/Component/HttpFoundation/Request.php
+++ b/src/Symfony/Component/HttpFoundation/Request.php
@@ -463,6 +463,40 @@ static public function isProxyTrusted()
return self::$trustProxy;
}
+ /**
+ * Normalizes a query string.
+ *
+ * It builds a normalized query string, where keys/value pairs are alphabetized
+ * and have consistent escaping.
+ *
+ * @param string $qs Query string
+ *
+ * @return string|null A normalized query string for the Request
+ */
+ static public function normalizeQueryString($qs = null)
+ {
+ if (!$qs) {
+ return null;
+ }
+
+ $parts = array();
+ $order = array();
+
+ foreach (explode('&', $qs) as $segment) {
+ if (false === strpos($segment, '=')) {
+ $parts[] = $segment;
+ $order[] = $segment;
+ } else {
+ $tmp = explode('=', rawurldecode($segment), 2);
+ $parts[] = rawurlencode($tmp[0]).'='.rawurlencode($tmp[1]);
+ $order[] = $tmp[0];
+ }
+ }
+ array_multisort($order, SORT_ASC, $parts);
+
+ return implode('&', $parts);
+ }
+
/**
* Gets a "parameter" value.
*
@@ -809,26 +843,7 @@ public function getUriForPath($path)
*/
public function getQueryString()
{
- if (!$qs = $this->server->get('QUERY_STRING')) {
- return null;
- }
-
- $parts = array();
- $order = array();
-
- foreach (explode('&', $qs) as $segment) {
- if (false === strpos($segment, '=')) {
- $parts[] = $segment;
- $order[] = $segment;
- } else {
- $tmp = explode('=', rawurldecode($segment), 2);
- $parts[] = rawurlencode($tmp[0]).'='.rawurlencode($tmp[1]);
- $order[] = $tmp[0];
- }
- }
- array_multisort($order, SORT_ASC, $parts);
-
- return implode('&', $parts);
+ return static::normalizeQueryString($this->server->get('QUERY_STRING'));
}
/**
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