Function MustSubFS

echo.go:919–925

MustSubFS creates sub FS from current filesystem or panic on failure. Panic happens when `fsRoot` contains invalid path according to `fs.ValidPath` rules. MustSubFS is helpful when dealing with `embed.FS` because for example `//go:embed assets/images` embeds files with paths including `assets/image

(currentFs fs.FS, fsRoot string)

// paths including `assets/images` as their prefix. In that case use `fs := echo.MustSubFS(fs, "rootDirectory") to
// create sub fs which uses necessary prefix for directory path.
func MustSubFS(currentFs fs.FS, fsRoot string) fs.FS {
	subFs, err := subFS(currentFs, fsRoot)
	if err != nil {
		panic(fmt.Errorf("can not create sub FS, invalid root given, err: %w", err))
	}
	return subFs
}

func sanitizeURI(uri string) string {
	// double slash `\\`, `//` or even `\/` is absolute uri for browsers and by redirecting request to that uri