api 500 on missing mime type

[ctengel]

obj_idx/api.py, line 116, in post

.part is indeterminate - but file shows *.mkv.part: Matroska data

[ctengel]

Even with #88 we likely want to keep this open as the ideal behavior here is for client to get real MIME and send it.

Should server even accept empty MIME type?

[ctengel]

ok - so from this issue - #88 basically solves the 500, and allows null MIME type for 200

client side is #43 and #42 (provide correct MIME type to both objidx and simplerobjects) and #56 (client provide key with correct extension)

#89 will be the follow up server behavior to make sure the objidx key will have the correct extension based on MIME - essentially enforcing above client behavior

(Simpler Objects already enforces MIME type - see ctengel/simpler-objects#28 )