Use correct error message and response code when RPC functions receive a...

## [Unreleased]

### Fixed

- Better handling of SSL connections in development configurations.

- Use correct error message and response code when RPC functions receive a request payload larger than allowed.

## [2.14.1] - 2020-11-02

### Added

	rpcFunctionNotFoundBytes = []byte(`{"error":"RPC function not found","message":"RPC function not found","code":5}`)

	internalServerErrorBytes = []byte(`{"error":"Internal Server Error","message":"Internal Server Error","code":13}`)

	badJSONBytes             = []byte(`{"error":"json: cannot unmarshal object into Go value of type string","message":"json: cannot unmarshal object into Go value of type string","code":3}`)

	requestBodyTooLargeBytes = []byte(`{"code":3, "message":"http: request body too large"}`)

)

func (s *ApiServer) RpcFuncHttp(w http.ResponseWriter, r *http.Request) {

	if r.Method == "POST" {

		b, err := ioutil.ReadAll(r.Body)

		if err != nil {

			// Error reading request body.

			// Request body too large.

			if err.Error() == "http: request body too large" {

				w.Header().Set("content-type", "application/json")

				w.WriteHeader(http.StatusBadRequest)

				sentBytes, err = w.Write(requestBodyTooLargeBytes)

				if err != nil {

					s.logger.Debug("Error writing response to client", zap.Error(err))

				}

				return

			}

			// Other error reading request body.

			w.Header().Set("content-type", "application/json")

			w.WriteHeader(http.StatusInternalServerError)

			sentBytes, err = w.Write(internalServerErrorBytes)