proxy

type HTTPClient interface {
	Do(req *fasthttp.Request, resp *fasthttp.Response) error
}

type Pool interface {
	// Get returns a new ReverseProxy from the pool.
	Get() (HTTPClient, error)

	// Put the ReverseProxy puts it back to the Pool.
	Put(HTTPClient) error

	// Close closes the pool and all its connections. After Close() the pool is
	// no longer usable.
	Close()

	// Len returns the current number of connections of the pool.
	Len() int
}