在发送给客户端之前查看响应标头？ [英] View response headers before they are sent to the client?

问题描述

我正在为学校写一个项目。我想能够在网页上显示Web服务器发送给客户端的响应头。我能够从HttpServletRequest读取请求头，并且能够将响应头写入HttpServletResponse没有问题。

有没有办法做到这一点？可以复制服务器要发送的内容吗？

我正在使用Eclipse Helios来开发具有POJO应用程序的JSP，并且正在使用运行在Debian Lenny上的Tomcat 5.5进行服务。

谢谢，

Ean

解决方案

你可以使用 Filter 和 HttpServletResponseWrapper 。

覆盖三个 addXHeader（..）方法，方法如下：

  void addHeader（String name，String value）{
 super.addHeader（name，value）; 
 getWriter（）。write（name +：+ value）; 
} 
  

然后，在过滤器：

  chain.doFilter（request，new HeaderHttpServletResponseWrapper（response））; 
  

但是我会使用Firebug来检查标题。

或看到这个问题（第二个答案）

I am writing a project for school. I want to be able to display, on a web page, the response headers that the web server sent to the client. I am able to read request headers from HttpServletRequest and am able to write response headers to HttpServletResponse no problem.

Is there any way to do this? It is possible to make a copy of what the server is about to send?

I am using Eclipse Helios to develop this JSP with POJOs application, and am using Tomcat 5.5 running on Debian Lenny to serve it.

Thanks,

Ean

解决方案

You can use a Filter and an HttpServletResponseWrapper.

Override the three addXHeader(..) methods with something like:

void addHeader(String name, String value) {
   super.addHeader(name, value);
   getWriter().write(name + " : " + value);
}

And then, in a Filter:

chain.doFilter(request, new HeaderHttpServletResponseWrapper(response));

But I would use Firebug to check headers.

Or see this question (the 2nd answer)

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