在 Java 中添加自定义 HTTP 标头

Adding custom HTTP headers in java

提问by ravun

I'm trying to create a simulation for our web Portal and need to add custom HTTP headers. I am to assume the user has already been authenticated and these headers are just for storing user information (ie, "test-header: role=user; oem=blahblah; id=123;").

我正在尝试为我们的 Web 门户创建一个模拟，并且需要添加自定义 HTTP 标头。我假设用户已经通过身份验证，这些标头仅用于存储用户信息（即“test-header: role=user; oem=blahblah; id=123;”）。

I've setup a filter to extract the header information but I can't find a way to inject the header information. They don't want it to be stored in cookies and maybe they will want to setup a global filter to include the headers on every page; is it possible to do something like this with the filter interface or through any other methods?

我已经设置了一个过滤器来提取标头信息，但我找不到注入标头信息的方法。他们不希望将其存储在 cookie 中，并且他们可能希望设置一个全局过滤器以在每个页面上包含标题；是否可以使用过滤器接口或任何其他方法来做这样的事情？

采纳答案by rodrigoap

Maybe you can store that information in the session:

也许您可以将该信息存储在会话中：

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @author rodrigoap
 * 
 */
public class UserInfoFilter implements Filter {

    /**
     * @see javax.servlet.Filter#destroy()
     */
    public void destroy() {
        // TODO
    }

    /**
     * @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest,
     *      javax.servlet.ServletResponse, javax.servlet.FilterChain)
     */
    public void doFilter(ServletRequest request, ServletResponse response,
            FilterChain filterChain) throws IOException, ServletException {
        if (!(request instanceof HttpServletRequest))
            throw new ServletException("Can only process HttpServletRequest");
        if (!(response instanceof HttpServletResponse))
            throw new ServletException("Can only process HttpServletResponse");
        HttpServletRequest httpRequest = (HttpServletRequest) request;
        HttpServletResponse httpResponse = (HttpServletResponse) response;

        httpRequest.getSession().setAttribute("role", "user");
        httpRequest.getSession().setAttribute("id", "123");
                filterChain.doFilter(request, response);
    }

    /**
     * @see javax.servlet.Filter#init(javax.servlet.FilterConfig)
     */
    public void init(FilterConfig filterConfig) throws ServletException {
        // TODO
    }

}

回答by kgiannakakis

You can use addHeader.

您可以使用addHeader。

回答by laz

You would need to utilize HttpServletRequestWrapperand provide your custom headers in when the various getHeader* methods are called.

您需要利用HttpServletRequestWrapper并在调用各种 getHeader* 方法时提供自定义标头。