Function ErrorHandler

tools/router/router.go:160–183

(resp http.ResponseWriter, req *http.Request, err error)

}

func ErrorHandler(resp http.ResponseWriter, req *http.Request, err error) {
	if err == nil {
		return
	}

	if ok, _ := getWritten(resp); ok {
		return // a response was already written (aka. already handled)
	}

	header := resp.Header()
	if header.Get("Content-Type") == "" {
		header.Set("Content-Type", "application/json")
	}

	apiErr := ToApiError(err)

	resp.WriteHeader(apiErr.Status)

	if req.Method != http.MethodHead {
		if jsonErr := json.NewEncoder(resp).Encode(apiErr); jsonErr != nil {
			log.Println(jsonErr) // truly rare case, log to stderr only for dev purposes
		}
	}
}

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