Method setResponseHeaderIfEmpty

tools/router/event.go:157–162

(key, value string)

const headerContentType = "Content-Type"

func (e *Event) setResponseHeaderIfEmpty(key, value string) {
	header := e.Response.Header()
	if header.Get(key) == "" {
		header.Set(key, value)
	}
}

// String writes a plain string response.
func (e *Event) String(status int, data string) error {