SendErrorJSON sets Content-Type: text/plain instead Content-Type: application/json; charset=utf-8

[egregors]

github.com/go-pkgz/rest v1.5.0

For some reason, SendErrorJSON writes the wrong Content-Type.

rest.SendErrorJSON(w, r, nil, http.StatusNotFound, nil, "nothing to show")

Response:

HTTP/1.1 404 Not Found
Date: Thu, 07 May 2020 08:21:12 GMT
Content-Length: 28
Content-Type: text/plain; charset=utf-8

{"error":"nothing to show"}


Response code: 404 (Not Found); Time: 22ms; Content length: 28 bytes

Looks like w.Header().Set("Content-Type", "application/json; charset=utf-8") should be called before w.WriteHeader(code).

[umputun]

fixed 55e60b1