util

type RewriteSpec struct {

	// Pattern is a regular expression. Any links which match this pattern
	// are re-written according to this spec.
	Pattern string

	// Scheme is the protocol to which the link should be re-written.
	// I.e. the link's existing protocol is replaced with this.  For
	// example, 'http' or 'https'. If empty, the link protocol is not
	// changed.
	Scheme string

	// Extension is the extension with which the link should be re-written.
	// In other words, the link's extension is replaced with this. If
	// empty, the link extension is not changed.
	Extension string

	// Proxy is a format string into which the link is substituted after
	// the protcol and extension have been re-written (if the pertinent
	// fields are non-empty). The format string should contain exactly one
	// "%s". The intended use case of this field is to allow Gemini or
	// Gopher links to be re-written to have appropriate proxies when
	// converting to HTTP.
	Proxy string

	// Encode if true will cause the link to be URL-encoded before
	// being inserted into the Proxy format string. Only has an effect
	// if Proxy is non-empty.
	Encode bool
}