1 files changed, 20 insertions, 0 deletions
diff --git a/djangorestframework/urlpatterns.py b/djangorestframework/urlpatterns.py
new file mode 100644
index 00000000..d34acf9b
--- /dev/null
+++ b/djangorestframework/urlpatterns.py
@@ -0,0 +1,20 @@
+from django.conf.urls.defaults import url
+
+
+def format_suffix_patterns(urlpatterns, suffix_required=False):
+    """
+    Supplement existing urlpatterns with corrosponding patterns that also
+    include a '.format' suffix.  Retains urlpattern ordering.
+    """
+    ret = []
+    for urlpattern in urlpatterns:
+        # Form our complementing '.format' urlpattern
+        regex = urlpattern.regex.pattern.rstrip('$') + '.(?P<format>[a-z]+)$'
+        view = urlpattern._callback or urlpattern._callback_str
+        kwargs = urlpattern.default_args
+        name = urlpattern.name
+        # Add in both the existing and the new urlpattern
+        if not suffix_required:
+            ret.append(urlpattern)
+        ret.append(url(regex, view, kwargs, name))
+    return ret