package com.github.zhangkaitao.shiro.chapter20.filter;
import com.github.zhangkaitao.shiro.chapter20.Constants;
import com.github.zhangkaitao.shiro.chapter20.realm.StatelessToken;
import org.apache.shiro.web.filter.AccessControlFilter;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
/**
* <p>User: Zhang Kaitao
* <p>Date: 14-2-26
* <p>Version: 1.0
*/
public class StatelessAuthcFilter extends AccessControlFilter {
@Override
protected boolean isAccessAllowed(ServletRequest request, ServletResponse response, Object mappedValue) throws Exception {
return false;
}
@Override
protected boolean onAccessDenied(ServletRequest request, ServletResponse response) throws Exception {
//1、客户端生成的消息摘要
String clientDigest = request.getParameter(Constants.PARAM_DIGEST);
//2、客户端传入的用户身份
String username = request.getParameter(Constants.PARAM_USERNAME);
//3、客户端请求的参数列表
Map<String, String[]> params = new HashMap<String, String[]>(request.getParameterMap());
params.remove(Constants.PARAM_DIGEST);
//4、生成无状态Token
StatelessToken token = new StatelessToken(username, params, clientDigest);
try {
//5、委托给Realm进行登录
getSubject(request, response).login(token);
} catch (Exception e) {
e.printStackTrace();
onLoginFail(response); //6、登录失败
return false;
}
return true;
}
//登录失败时默认返回401状态码
private void onLoginFail(ServletResponse response) throws IOException {
HttpServletResponse httpResponse = (HttpServletResponse) response;
httpResponse.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
httpResponse.getWriter().write("login error");
}
}