asp.net MVC 3/4 equivalent to a response.filter
am in a need to intercept all of the html that will be sent to the browser and replace some tags that are there. this will need to be done globally and for every view. what is the best way to do this in ASP.NET MVC 3 or 4 using C#? In past I have done this in ASP.net Webforms using the 'response.filter' in the Global.asax (vb)
Private Sub Global_PreRequestHandlerExecute(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.PreRequestHandlerExecute
Response.Filter = New ReplaceTags(Response.Filter)
End Sub
this calls a class I created that inherits from the system.io.stream and that walked through the html to replace all the tags. I have no idea as to how to do this in ASP.NET MVC 4 using C#. As you might have noticed I am a completely newbee in the MVC world.
You could still use a response filter in ASP.NET MVC:
public class ReplaceTagsFilter : MemoryStream
{
private readonly Stream _response;
public ReplaceTagsFilter(Stream response)
{
_response = response;
}
public override void Write(byte[] buffer, int offset, int count)
{
var html = Encoding.UTF8.GetString(buffer);
html = ReplaceTags(html);
buffer = Encoding.UTF8.GetBytes(html);
_response.Write(buffer, offset, buffer.Length);
}
private string ReplaceTags(string html)
{
// TODO: go ahead and implement the filtering logic
throw new NotImplementedException();
}
}
and then write a custom action filter which will register the response filter:
public class ReplaceTagsAttribute : ActionFilterAttribute
{
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
var response = filterContext.HttpContext.Response;
response.Filter = new ReplaceTagsFilter(response.Filter);
}
}
and now all that's left is decorate the controllers/actions that you want to be applied this filter:
[ReplaceTags]
public ActionResult Index()
{
return View();
}
or register it as a global action filter in Global.asax if you want to apply to all actions.
The answer is correct but. After using it for a while I came across a case when the response is split in many parts so that html is incorrect
Part 1:
<html>.....<labe
Part 2:
l/>...</html>
Also partial renders may make unexpected cases. Their html is out of the main stream too. So my solution is to do it in the Flush method after all streaming is done.
/// <summary>
/// Insert messages and script to display on client when a partial view is returned
/// </summary>
private class ResponseFilter : MemoryStream
{
private readonly Stream _response;
private readonly IList<object> _detachMessages;
public override void Flush()
{
// add messages and remove
// filter is called for a number of methods on one page (BeginForm, RenderPartial...)
// so that we don't need to add it more than once
var html = MessageAndScript(_detachMessages);
var buffer = Encoding.UTF8.GetBytes(html);
_detachMessages.Clear();
_response.Write(buffer, 0, buffer.Length);
base.Flush();
}
public ResponseFilter(Stream response, IList<object> detachMessages)
{
_response = response;
_detachMessages = detachMessages;
}
public override void Write(byte[] buffer, int offset, int count)
{
_response.Write(buffer, offset, buffer.Length);
}
private static string MessageAndScript(IList<object> detachMessages)
{
if (detachMessages.Count == 0)
return null;
var javascript = CustomJavaScriptSerializer.Instance.Serialize(detachMessages);
return "$(function(){var messages = " + javascript + @";
// display messages
base.ajaxHelper.displayMessages(messages);
})";
}
}asp.net MVC 3/4 equivalent to a response.filter的更多相关文章
- 在ASP.NET MVC中的四大筛选器（Filter）及验证实现
http://www.cnblogs.com/artech/archive/2012/08/06/action-filter.html http://www.cnblogs.com/ghhlyy/ar ...
- ASP.NET MVC学习（三）之过滤器Filter
http://www.cnblogs.com/yaopengfei/p/7910763.html
- ASP.NET MVC Filters 4种默认过滤器的使用【附示例】
过滤器(Filters)的出现使得我们可以在ASP.NET MVC程序里更好的控制浏览器请求过来的URL,不是每个请求都会响应内容,只响应特定内容给那些有特定权限的用户,过滤器理论上有以下功能: 判断 ...
- ASP.Net请求处理机制初步探索之旅 - Part 5 ASP.Net MVC请求处理流程
好听的歌 我一直觉得看一篇文章再听一首好听的歌,真是种享受.于是,我在这里嵌入一首好听的歌,当然你觉得不想听的话可以点击停止,歌曲 from 王菲 <梦中人>: --> 开篇:上一篇 ...
- 16、ASP.NET MVC入门到精通——MVC过滤器
本系列目录:ASP.NET MVC4入门到精通系列目录汇总 在ASP.NET MVC中有四种过滤器类型
- 一种仿照Asp.net Mvc思维构建WebSocket服务器的方法
问题场景 Asp.net Mvc提供了DependencyResolver.Routing.Filter. Modelbinder等webForm所没有新概念,提高Web服务编写的便利性,记得很久之前 ...
- ASP.NET MVC的Action Filter
一年前写了一篇短文ASP.NET MVC Action Filters,整理了Action Filter方面的资源,本篇文章详细的描述Action Filter.Action Filter作为一个可以 ...
- Asp.net Mvc WebSocket
转载一种仿照Asp.net Mvc思维构建WebSocket服务器的方法 问题场景 Asp.net Mvc提供了DependencyResolver.Routing.Filter. Modelbind ...
- ASP.Net MVC请求处理流程
ASP.Net MVC请求处理流程 好听的歌 我一直觉得看一篇文章再听一首好听的歌,真是种享受.于是,我在这里嵌入一首好听的歌,当然你觉得不想听的话可以点击停止,歌曲 from 王菲 <梦中人& ...
随机推荐
- python基础学习之路No.3 控制流if,while,for
在学习编程语言的过程中,有一个很重要的东西,它就是判断,也可以称为控制流. 一般有if.while.for三种 ⭐if语句 if语句可以有一个通俗的解释,如果.假如 如果条件1满足,则…… 如果条件2 ...
- NYOJ 石子合并（一）(区间DP)
题目链接:http://acm.nyist.edu.cn/JudgeOnline/problem.php?pid=737 题目大意: 有N堆石子排成一排,每堆石子有一定的数量.现要将N堆石子并成为一堆 ...
- NOIP2015 D2T3 运输计划
拿到题目的第一眼 首先这是一棵n个节点的树(别说你看不出来) 然后对于树上的m条链我们可以选取树上的唯一一条边使它的边权变为0 求处理后最长链的长度 20分 m=1好啦,好像可做一眼望去全是水 只需求 ...
- 我常用的 Python 调试工具 - 博客 - 伯乐在线
.ckrating_highly_rated {background-color:#FFFFCC !important;} .ckrating_poorly_rated {opacity:0.6;fi ...
- 20165203迭代和JDB测试
1.使用C(n,m)=C(n-1,m-1)+C(n-1,m)公式进行递归编程实现求组合数C(m,n)的功能 public class C { public static void main(Strin ...
- who am i ？
Id:Ox9A82 Email:hucvbty@gmail.com 微博:http://weibo.com/1828621423 知乎:Ox9A82 常乐村男子职业技术学院 Syclover拖后腿成员 ...
- 安装VM虚拟机提示 尝试创建目录 C:\Public\documents\SharedVirtual Machines 时发生错误解决方法
把Windows Defender安全中心的“受控制文件夹的访问”给关闭了,然后就可以顺利安装上了. 作者:耑新新,发布于 博客园 转载请注明出处,欢迎邮件交流:zhuanxinxin@foxmai ...
- python错误：UnicodeDecodeError: 'utf8' codec can't decode byte 0xe6 in position 0: unexpected end of data
一.错误原因 在学习selenium自动化测试框架的时候,进行模仿浏览器搜索功能,输入英文是没问题,但是输入中文就报错,报错代码 def test_baidu_search(self): " ...
- logstash部署及基本语法（二）
一.logstash介绍 Logstash是一个开源的数据收集引擎,可以水平伸缩,而且logstash是整个ELK当中拥有最多插件的一个组件,其可以接收来自不同源的数据并统一输入到指定的且可以是不同目 ...
- R语言实战（六）重抽样与自助法
本文对应<R语言实战>第12章:重抽样与自助法 之前学习的基本统计分析.回归分析.方差分析,是假定观测数据抽样自正态分布或者其他性质较好的理论分布,进而进行的假设检验和总体参数的置信区间估 ...