Base content type detection on content-type header of request instead of file ending

[holycrab13]

The file ending is mandatory at the moment as it is used for content type detection and does not allow saving at arbitrary locations.

Would it be possible to use the content type header instead?

[manonthegithub]

No. If it were possible, I would have done that.

[holycrab13]

Ok, a document format must be detectable always, not only at the time of the request - thus file endings mandatory.

[manonthegithub]

#38 (comment)