Duplicate Write to response custom writer buffer.

[fontseca]

If a previous WriteHeader(404) was invoked, line 231 gets executed provoking a second Write.

noda-tasks-management-tool-api/main.go

Lines 230 to 232 in c9e0c6a

	if http.StatusNotFound == recorder.statusCode() {
	failure.EmitError(w, failure.ErrTargetNotFound, true)
	}

Check EmitError implementation:

noda-tasks-management-tool-api/failure/error.go

Lines 328 to 353 in c9e0c6a

	func EmitError(w http.ResponseWriter, e *Error, wroteHeader ...bool) {
	var response = &errorBody{
	Code: e.code,
	Message: e.message,
	Hint: e.hint,
	}
	var buf = []byte(e.details)
	err := json.Unmarshal(buf, &response.Details)
	if nil != err {
	var s *json.SyntaxError
	if errors.As(err, &s) {
	/* A normal string is expected. */
	response.Details = &e.details
	}
	}
	res, err := json.Marshal(response)
	if err != nil {
	log.Println(err)
	w.WriteHeader(http.StatusInternalServerError)
	return
	}
	if 0 == len(wroteHeader) || !wroteHeader[0] {
	w.WriteHeader(e.status)
	}
	w.Write(res)
	}