Function serve

internal/spa/handler.go:46–59

serve 将 src 写入 w，根据客户端能力决定是否 gzip 压缩

(w http.ResponseWriter, r *http.Request, src io.Reader)

// serve 将 src 写入 w，根据客户端能力决定是否 gzip 压缩
func serve(w http.ResponseWriter, r *http.Request, src io.Reader) {
	if !acceptsGzip(r) {
		io.Copy(w, src)
		return
	}
	w.Header().Set("Content-Encoding", "gzip")
	gz := gzPool.Get().(*gzip.Writer)
	gz.Reset(w)
	defer func() {
		gz.Close()
		gzPool.Put(gz)
	}()
	io.Copy(gz, src)
}

func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	// Clean URL path