Add MultipartBody.Builder#addFormDataPart that accepts a MediaType

[marcelstoer]

Could you please add a MultipartBody.Builder#addFormDataPart overload that accepts a MediaType. Some web frameworks will outright ignore parts without content type. Without it we have to resort to this beast.

.addPart(Headers.of("Content-Disposition", "form-data; name=\"title\""), RequestBody.create("Square Logo", MediaType.get("text/plain")))

Reference: 26949cf#r36218386

[swankjesse]

I'd like to check to see what browsers do here, and do likewise.

[ntrp]

So what happened to this? It's still broken for multipart mixed content requests