解决https无法缓存的问题

火狐弃用http,转而大力推广https的动作一石激起千层浪,非常多没有安装安全证书的站点使用新版火狐浏览器已经打不开了。

之前我们站点仅仅有涉及须要加密的部分连接为https协议。眼下看来不得不将整个站点的连接均加装https。原本执行正常的功能就这样出现了问题。具体情况是,产品列表页面使用ajax载入产品的时候不能再像从前那样缓存之前载入好的数据了。造成这样的情况的原因主要有两点,第一点是在后台设置的过滤器强制每一个页面不缓存内容。第二个原因便是由于整个站点都进行了安全加密,使得浏览器本身不会再进行页面缓存。解决问题的方法是在须要缓存数据的页面设置强制缓存,例如以下:

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>
<%
	String path = request.getContextPath();

	int nMinutes = 60 * 24 * 7;
	Date d = new Date();
	String modDate = d.toGMTString();
	String expDate = null;
	expDate = (new Date(d.getTime() + nMinutes * 60000)).toGMTString();
	response.setHeader("Last-Modified", modDate); 
	response.setHeader("Expires", expDate); 
	
	response.setHeader("Pragma","public");
	response.setHeader("Cache-Control","public");	
%>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
<meta name="apple-mobile-web-app-capable" content="yes" />
<link href="<%=path%>/resources/weixin/css/style.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="<%=path%>/resources/weixin/js/jquery-1.10.2.min.js"></script>
<script type="text/javascript" src="<%=path%>/resources/weixin/js/progressbar.js"></script>
<script type="text/javascript" src="<%=path%>/resources/weixin/js/common.js"></script>
<script type="text/javascript" src="<%=path%>/resources/weixin/js/account.js"></script>
<script type="text/javascript" src="<%=path%>/resources/js/common.js"></script>
<script type="text/javascript">
$(document).ready(function() {
	$("#investpage").addClass("current");
	if(isWeiXin()){
		$("#page").val("1");
	}
 	addMoreProducts();
});
</script>
<title>普惠理財-产品列表</title>
</head>
<body>
	<header id="header">
		<h3>产品列表</h3>
	</header>
	<div id="container">
		<form id="centerForm" name="centerForm" method="post" action="">
			<input type="hidden" id="page" name="page" value="1" />
		</form>
		<div id="proList" class="pro_list">
			
			
		</div>
		<div id="addTag " class="addTag">
			<a href="javascript:void(0)" onclick="addMoreProducts()">
				<span id="loading" class="icon"></span><span id="promtText">载入中...</span>
			</a>
		</div>
	</div>
	<footer id="footer">
		<jsp:include page="../footer.jsp" />
	</footer>
</body>
</html>

尤其要注意Cache-Control的值和Pragma的值均为”public“。

原文地址:https://www.cnblogs.com/bhlsheji/p/5241650.html