Trouble with getting a CouchApp to output the correct mime type for an appcache

So in CouchDB, you can supposedly change mime types. In Futon you just have to go and edit the source of the document and change the content_type field on attachments in the _attachment field. Trouble is, when I do this so that an appcache file has the correct mime type (text/cache-manifest), and save the document, it doesn't save and the content_type field is just blank again "". Any tips on outputing the right mim开发者_StackOverflowe type?

Wow, that is weird.

You can work-around this problem by adding a Content-Type: text/cache-manifest header when you store the attachment.

I think this will not work from a browser because it overrides the Content-Type. You can use curl from the command-line to upload an attachment. You need to know the document's current _rev revision value.

curl -X PUT -H "Content-Type: text/cache-manifest" \
     --data-binary @/path/to/appcache/file         \
     http://localhost:5984/db/the_doc/cache.manifest?rev=123-abcdef

The _attachments object is not user editable, which explains why your update did not work as expected. The most you can do with _attachments is to remove attachments completely by removing them from the object.