Liferay.Util。用帖子URL打开窗口?(以允许更长的参数)

该portlet转换文本并将结果发送回弹出窗口中显示 ):

<liferay-portlet:renderURL
        portletName="<%= portletId %>"
        var="uri"
        windowState="<%=LiferayWindowState.POP_UP.toString()%>">
    <portlet:param name="text" value="TEXTPLACEHOLDER" />
</liferay-portlet:renderURL>

<aui:script>
function transformTextAndShowPopup() {
    var uri = "<%= uri %>";
    uri = uri.replace("TEXTPLACEHOLDER", readTextEnteredByUser());

    javascript:Liferay.Util.openWindow({
        dialog:{
            width: 700,
            height: 300,
            resizable: true,
            modal:false,
            destroyOnClose: true
        },
        id: "My popup",
        title: "My popup",
        uri: uri
    });
</aui:script>

:我现在也需要处理长文本。我不能再依赖GET参数了,因为 GET parameters can not be over a few kilobytes

The server refused this request because the request URI was too long.

问题:我可以启动一个 Liferay.Util.openWindow 有POST请求吗?或者打开带有长文本的Liferay弹出窗口?(如30KB)