authelia/internal/utils/url.go

package utils

import (
	"net/url"
	"path"
)

// URLPathFullClean returns a URL path with the query parameters appended (full path) with the path portion parsed
// through path.Clean given a *url.URL.
func URLPathFullClean(u *url.URL) (output string) {
	lengthPath := len(u.Path)
	lengthQuery := len(u.RawQuery)
	appendForwardSlash := lengthPath > 1 && u.Path[lengthPath-1] == '/'

	switch {
	case lengthPath == 1 && lengthQuery == 0:
		return u.Path
	case lengthPath == 1:
		return path.Clean(u.Path) + "?" + u.RawQuery
	case lengthQuery != 0 && appendForwardSlash:
		return path.Clean(u.Path) + "/?" + u.RawQuery
	case lengthQuery != 0:
		return path.Clean(u.Path) + "?" + u.RawQuery
	case appendForwardSlash:
		return path.Clean(u.Path) + "/"
	default:
		return path.Clean(u.Path)
	}
}