Minor PR cleanup and reorganization.

django_mailbox/utils.py

@@ -0,0 +1,31 @@
+import email.header
+import logging
+
+from django.conf import settings
+
+
+logger = logging.getLogger(__name__)
+
+
+DEFAULT_CHARSET = getattr(
+    settings,
+    'DJANGO_MAILBOX_DEFAULT_CHARSET',
+    'ascii',
+)
+
+
+def decode_header(header):
+    try:
+        return ''.join(
+            [
+                unicode(t[0], t[1] or DEFAULT_CHARSET)
+                for t in email.header.decode_header(header)
+            ]
+        )
+    except UnicodeDecodeError:
+        logger.exception(
+            'Errors encountered decoding header %s into encoding %s.',
+            header,
+            DEFAULT_CHARSET,
+        )
+        return unicode(header, DEFAULT_CHARSET, 'replace')