1 files changed, 22 insertions, 0 deletions
diff --git a/urllib3/util/response.py b/urllib3/util/response.py
new file mode 100644
index 0000000..45fff55
--- /dev/null
+++ b/urllib3/util/response.py
@@ -0,0 +1,22 @@
+def is_fp_closed(obj):
+    """
+    Checks whether a given file-like object is closed.
+
+    :param obj:
+        The file-like object to check.
+    """
+
+    try:
+        # Check via the official file-like-object way.
+        return obj.closed
+    except AttributeError:
+        pass
+
+    try:
+        # Check if the object is a container for another file-like object that
+        # gets released on exhaustion (e.g. HTTPResponse).
+        return obj.fp is None
+    except AttributeError:
+        pass
+
+    raise ValueError("Unable to determine whether fp is closed.")