package com.github.zhangkaitao.shiro.chapter8.web.filter;
import org.apache.shiro.subject.Subject;
import org.apache.shiro.util.StringUtils;
import org.apache.shiro.web.filter.AccessControlFilter;
import org.apache.shiro.web.util.WebUtils;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;
/**
* <p>User: Zhang Kaitao
* <p>Date: 14-2-4
* <p>Version: 1.0
*/
public class AnyRolesFilter extends AccessControlFilter {
private String unauthorizedUrl = "/unauthorized.jsp";
private String loginUrl = "/login.jsp";
@Override
protected boolean isAccessAllowed(ServletRequest request, ServletResponse response, Object mappedValue) throws Exception {
String[] roles = (String[])mappedValue;
if(roles == null) {
return true;//如果没有设置角色参数，默认成功
}
for(String role : roles) {
if(getSubject(request, response).hasRole(role)) {
return true;
}
}
return false;//跳到onAccessDenied处理
}
@Override
protected boolean onAccessDenied(ServletRequest request, ServletResponse response) throws Exception {
Subject subject = getSubject(request, response);
if (subject.getPrincipal() == null) {//表示没有登录，重定向到登录页面
saveRequest(request);
WebUtils.issueRedirect(request, response, loginUrl);
} else {
if (StringUtils.hasText(unauthorizedUrl)) {//如果有未授权页面跳转过去
WebUtils.issueRedirect(request, response, unauthorizedUrl);
} else {//否则返回401未授权状态码
WebUtils.toHttp(response).sendError(HttpServletResponse.SC_UNAUTHORIZED);
}
}
return false;
}
}