使用过滤器从 HTTPS 重定向到 HTTP

Question

我的应用程序中有几个页面在 https://localhost:8181 上运行，并且有几个页面在 http://localhost:8080.I 想从 https 降级到 http，但不知道如何去做。我知道我有使用过滤器来管理从 https 到的重定向http 和 http 到 https。

我查看了此链接 [How to downshift from HTTPS to HTTP in your web application][1]

[1]: https://blogs.oracle.com/jluehe/entry/how_to_downshift_from_https 但是使用过滤器的链接已损坏..我没有关于过滤器内部应该做什么的清晰想法...

在我的 web.xml 中`

  <filter>
      <filter-name>Non SSL port</filter-name>
      <filter-class>SSLFilter</filter-class>
      <init-param>
      <param-name>httpPort</param-name>
      <param-value>8080</param-value>
    </init-param>   
    </filter>

    <filter-mapping>
    <filter-name>NON SSL pages</filter-name>    
    <url-pattern>/pages/success.xhtml</url-pattern>
    <url-pattern>/pages/failure.xhtml</url-pattern>
    <url-pattern>/pages/about.xhtml</url-pattern>
   </filter-mapping>`

可以有人指导我过滤器内部需要做什么，以便 https 到 http 之间的转换顺利。

我正在使用 Glassfish 3.1.1 和 JSF。

Answer 1

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;  

public class HttpsRedirectFilter implements Filter {

public void doFilter(ServletRequest request, ServletResponse response, 
                      FilterChain chain) throws IOException, ServletException {

    if(request instanceof HttpServletRequest
         && response instanceof HttpServletResponse) {
        HttpServletRequest httpReq = (HttpServletRequest) request;
        String redirectTarget = httpReq.getRequestURL().toString();
        redirectTarget = redirectTarget.replaceFirst("https", "http")
        redirectTarget = redirectTarget.replaceFirst(":8443", ":8080");  
        redirectTarget = redirectTarget.replaceFirst("home", "home.do");  
        if(request.isSecure()) {                   
            ((HttpServletResponse)response).sendRedirect(redirectTarget);  
        } else {  
            chain.doFilter(request, response);  
        }  
    }  
}
}