Einstellung Authentication Header im Servlet über Filter

Vorwort

Dies ist mein Erster Versuch einen Filter, sanft sein.

Projektbeschreibung

Ich versuche abzuschließen, der einen build für eine Einzelanmeldung für mehrere Anwendungen und ich scheine gegen eine Wand. Die webapp, ich bin versucht zu verbinden kommt die "Authentifizierung" - header, um zu bestimmen, Anmeldeinformationen des Benutzers innerhalb der Anwendung. Ich habe einen Filter gebaut, mit der Hoffnung, die Einstellung des headers, bevor es an die webapp.

Das Problem

Übergibt der code der eclipse-Validierung, kompiliert, geladen, Tomcat, und gelangt durch die webapp. Das einzige, was fehlt, ist der header Authentifizierung.

Was ich bin fehlt/falsch?

AuthenticationFilter Quelle

package xxx.xxx.xxx.xxx.filters;

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.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import xxx.xxx.xxx.ConfigFile;
import xxx.xxx.xxx.Console;
import xxx.xxx.xxx.FalseException;

import xxx.xxx.activity.EncryptUtil;

public class AuthenticationFilter implements Filter {
  public ConfigFile config;

  public void init(FilterConfig arg0) throws ServletException {
    config = new ConfigFile("C:/config.properties");
  }

  public void doFilter(ServletRequest sRequest, ServletResponse sResponse, FilterChain filterChain) throws IOException, ServletException {
    Console.debug("AuthenticationFilter.doFilter() triggered.");
    ServletRequestWrapper request = new ServletRequestWrapper((HttpServletRequest) sRequest);
    HttpServletResponse response = (HttpServletResponse) sResponse;
    HttpSession session = request.getSession();
    Cookie cookie = null;
    try {
      if (request.getParameter("logout") != null) {
        session.invalidate();
        throw new FalseException("Logout recieved");
      }
      String auth = request.getHeader("Authorization");
      if (auth == null) {
        Console.debug("Authorization Header not found.");
        //get cookie --COOKIE NAME--
        Cookie[] cookies = request.getCookies();
        if (cookies == null) {
          throw new FalseException("Cookies not set.");
        }
        for (int i = 0; i < cookies.length; i++) {
          if (cookies[i].getName().equals(config.getProperty("authentication.cookie.name"))) {
            cookie = cookies[i];
          }
        }
        if (cookie == null) {
          throw new FalseException("Cannot find Cookie (" + config.getProperty("authentication.cookie.name") + ") on Client");
        }
        Console.debug("Cookie (" + config.getProperty("authentication.cookie.name") + ") found on Client. value="+cookie.getValue());
        String decToken = decryptToken(cookie.getValue());
        Console.debug("Decrypted Token: "+decToken);

        Console.debug("Setting Authorization Header...");
        request.setAttribute("Authorization", decToken);
        request.addHeader("Authorization", decryptToken(cookie.getValue()));
        Console.debug("Authorization Header set.");
        Console.debug("Validating Authorization Header value: "+request.getHeader("Authorization"));
      }
    }catch (FalseException e) {
      Console.msg(e.getMessage() + ", giving the boot.");
      response.sendRedirect(config.getProperty("application.login.url"));
    } catch (Exception e) {
      Console.error(e);
    }
    Console.debug("AuthenticationFilter.doFilter() finished.");
    filterChain.doFilter(request, response);
  }

  public void destroy() {

  }

  private String decryptToken(String encToken) {
    String token = null;
    token = EncryptUtil.decryptFromString(encToken);
    return token;
  }
}

web.xml Quelle

<web-app>
  <filter>
    <filter-name>AuthenticationFilter</filter-name>
    <display-name>AuthenticationFilter</display-name>
    <description></description>
    <filter-class>com.xxx.xxx.xxx.filters.AuthenticationFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>AuthenticationFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  ...
</web-app>

ServletRequestWrapper Quelle

package com.xxx.xxx.xxx.filters;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

public class ServletRequestWrapper extends javax.servlet.http.HttpServletRequestWrapper {

  public ServletRequestWrapper(HttpServletRequest request) {
    super(request);
    headerMap = new HashMap();
  }

  private Map headerMap;

  public void addHeader(String name, String value) {
    headerMap.put(name, new String(value));
  }

  public Enumeration getHeaderNames() {
    HttpServletRequest request = (HttpServletRequest) getRequest();
    List list = new ArrayList();
    for (Enumeration e = request.getHeaderNames(); e.hasMoreElements();) {
      list.add(e.nextElement().toString());
    }

    for (Iterator i = headerMap.keySet().iterator(); i.hasNext();) {
      list.add(i.next());
    }
    return Collections.enumeration(list);
  }

  public String getHeader(String name) {
    Object value;
    if ((value = headerMap.get("" + name)) != null)
      return value.toString();
    else
      return ((HttpServletRequest) getRequest()).getHeader(name);
  }

}

Debug-Log

LoginServlet.doGet() triggered.
[DEBUG] : Authenticate.isClientLoggedIn() triggered.
xxx url : https://xxx.xxx.xxx/xxx/home.action
[DEBUG] : Authenticate.isClientLoggedIn() status code: 401
Unauthorized User.
Client IS NOT logged in.

-- Fill out Login Form, submit --

LoginServlet.doPost() triggered.
[DEBUG] : Authenticate.isClientLoggedIn() triggered.
xxx url : https://xxx.xxx.xxx./xxx/home.action
[DEBUG] : Authenticate.isClientLoggedIn() status code: 401
Unauthorized User.
Client IS NOT logged in.
Client (--USERID--) attempting basic authentication with password(--PASSWORD--).
[DEBUG] : BasicAuthentication.touch(http://localhost:PORT/vu/loginCheck.html, --USERID--, --PASSWORD--) triggered.
[DEBUG] : BasicAuthentication.touch() response code: 200
Client (--USERID--) has been logged IN.
Client (--USERID--) basic authentication finished, Client is logged in.
Client (--USERID--) logged in successfully.
[DEBUG] : Cookie (xxx_token) Set: 1e426f19ebdfef05dec6544307addc75401ecdc908a3c7e6df5336c744--SECRET--
[DEBUG] : Redirecting client to https://xxx.xxx.xxx/xxx/home.action

-- Redirected to webapp, filter recieves --

[DEBUG] : AuthenticationFilter.doFilter() triggered.
[DEBUG] : Authorization Header not found. << Initical check to see if user is already logged in to site
[DEBUG] : Cookie (xxx_token) found on Client. value=1e426f19ebdfef05dec6544307addc75401ecdc908a3c7e6df5336c744--SECRET--
[DEBUG] : Decrypted Token: Basic --SECRET--
[DEBUG] : Setting Authorization Header...
[DEBUG] : Authorization Header set.
[DEBUG] : Validating Authorization Header value: Basic --SECRET-- << Value matches Decrypted Token
[DEBUG] : AuthenticationFilter.doFilter() finished.

-- Web Application errors out, unable to find Authorization header 

Vielen Dank für Ihre Hilfe.

InformationsquelleAutor PseudoNinja | 2011-02-04