The dump tool will fallback to the old 'content-type' name when 'content_type' is not found, so it can be actually used to dump attachments from older CouchDB versions.

cmlenz · cmlenz · commit 49e749094ce3 · 2008-06-04T09:48:52.000Z
--HG--
extra : convert_revision : svn%3A7a298fb0-333a-0410-83e7-658617cd9cf3/trunk%4071
diff --git a/couchdb/tools/dump.py b/couchdb/tools/dump.py
@@ -34,7 +34,10 @@ def dump_db(dburl, username=None, password=None, boundary=None):
             inner = MIMEMultipart('mixed')
             inner.attach(part)
             for name, info in attachments.items():
-                maintype, subtype = info['content_type'].split('/', 1)
+                content_type = info.get('content_type')
+                if content_type is None: # CouchDB < 0.8
+                    content_type = info.get('content-type')
+                maintype, subtype = content_type.split('/', 1)
                 subpart = MIMEBase(maintype, subtype)
                 subpart['Content-ID'] = name
                 subpart.set_payload(b64decode(info['data']))
