proxy

type Cache interface {
	// Get retrieves the cached data for the provided key.
	Get(key string) (data []byte, ok bool)

	// Set caches the provided data.
	Set(key string, data []byte)

	// Delete deletes the cached data at the specified key.
	Delete(key string)
}

type Proxy struct {
	Client *http.Client // client used to fetch remote URLs
	Cache  Cache

	// Whitelist specifies a list of remote hosts that images can be proxied from.  An empty list means all hosts are allowed.
	Whitelist []string

	MaxWidth  int
	MaxHeight int
}

type URLError struct {
	Message string
	URL     *url.URL
}