Fixed #17734 -- Made sure to only redirect translated URLs if they can actually be resolved to prevent unwanted redirects. Many thanks to Orne Brocaar and Anssi Kääriäinen for input.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@17621 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/urlresolvers.py

@@ -518,3 +518,17 @@ def get_urlconf(default=None):
     changed from the default one.
     """
     return getattr(_urlconfs, "value", default)
+
+def is_valid_path(path, urlconf=None):
+    """
+    Returns True if the given path resolves against the default URL resolver,
+    False otherwise.
+
+    This is a convenience method to make working with "is this a match?" cases
+    easier, avoiding unnecessarily indented try...except blocks.
+    """
+    try:
+        resolve(path, urlconf)
+        return True
+    except Resolver404:
+        return False