前言
这是我第一次尝试编写Filter,请温柔一点。
项目描述
我正在尝试为我们的几个应用程序完成单点登录(SSO)构建,并且似乎遇到了难题。我试图连接到的Web应用程序使用“Authentication”头确定应用程序中的用户凭据。我已经构建了一个Filter,希望在传递给Web应用程序之前设置头信息。
问题
代码通过Eclipse验证,编译,加载到Tomcat并传递到Web应用程序。唯一缺少的就是Authentication头信息。
我错过了什么/做错了什么?
AuthenticationFilter源码
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源代码
<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 源码
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);
}
}
调试日志
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
谢谢您的帮助。
URL#openConnection()
,但显然这与您的过滤器不兼容(这可能是问题的根本原因)。 - BalusCrequest.getHeader()
吗?请求是否是ServletRequestWrapper
的实例? - BalusC