// Render an arbitrary Markdown document.
func Markdown(ctx *middleware.Context, form apiv1.MarkdownForm) {
	if ctx.HasApiError() {
		ctx.JSON(422, base.ApiJsonErr{ctx.GetErrMsg(), DOC_URL})
		return
	}

	switch form.Mode {
	case "gfm":
		ctx.Write(base.RenderMarkdown([]byte(form.Text),
			setting.AppUrl+strings.TrimPrefix(form.Context, "/")))
	default:
		ctx.Write(base.RenderRawMarkdown([]byte(form.Text), ""))
	}
}