Vendor parse_auth approach

sentry/utils/auth.py

@@ -0,0 +1,11 @@
+def _make_key_value(val):
+    return val.strip().split("=", 1)
+
+
+def parse_auth_header(header):
+    if isinstance(header, bytes):
+        header = header.decode("latin1")
+    try:
+        return dict(map(_make_key_value, header.split(" ", 1)[1].split(",")))
+    except Exception:
+        return {}