Does Swagger Editor supports Multiparts Custom Headers ?

Hi jberger,

Custom headers defined in the "encoding" attribute are not supported in "try it out" yet. You can follow this issue for status updates:

https://github.com/swagger-api/swagger-ui/issues/5356

As for Content-Length, RFC 7578 says:

>>

The multipart/form-data media type does not support any MIME header fields in parts other than Content-Type, Content-Disposition, and (in limited circumstances) Content-Transfer-Encoding. Other header fields MUST NOT be included and MUST be ignored.

<<

so this is not supported.