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shiro拦截认证的全过程记录

程序员文章站 2022-06-30 20:19:03
目录概述shrio 拦截认证全过程总结概述shiro是apache旗下一个开源安全框架(http://shiro.apache.org/),它将软件系统的安全认证相关的功能抽取出来,实现用户身份认证,...

概述

shiro是apache旗下一个开源安全框架(http://shiro.apache.org/),它将软件系统的安全认证相关的功能抽取出来,实现用户身份认证,权限授权、加密、会话管理等功能,组成了一个通用的安全认证框架。使用shiro就可以非常快速的完成认证、授权等功能的开发,降低系统成本。

shiro框架三大核心对象

shiro拦截认证的全过程记录

说明:

1)subject :主体对象,负责提交用户认证和授权信息。

2)securitymanager:安全管理器,负责认证,授权等业务实现。(核心)

3)realm:领域对象,负责从数据层获取业务数据。

shrio 拦截认证全过程

 1.filterregistrationbean过滤注册bean

@bean
public filterregistrationbean shirofilterregistration() {
    filterregistrationbean registration = new filterregistrationbean();
    registration.setfilter(new delegatingfilterproxy("shirofilter"));
    //该值缺省为false,表示生命周期由springapplicationcontext管理,设置为true则表示由servletcontainer管理
    registration.addinitparameter("targetfilterlifecycle", "true");
    registration.setenabled(true);
    registration.setorder(integer.max_value - 1);
    registration.addurlpatterns("/*");
    return registration;
}

设置过滤的bean

2.shirofilter 实际过滤配置bean

@bean("shirofilter")
public shirofilterfactorybean shirfilter(securitymanager securitymanager) {
    shirofilterfactorybean shirofilter = new shirofilterfactorybean();
    shirofilter.setsecuritymanager(securitymanager);

    //oauth过滤
    map<string, filter> filters = new hashmap<>(10);
    filters.put("oauth2", new oauth2filter());
    shirofilter.setfilters(filters);

    map<string, string> filtermap = new linkedhashmap<>();
    filtermap.put("/webjars/**", "anon");
    filtermap.put("/druid/**", "anon");
    filtermap.put("/login", "anon");

    filtermap.put("/**", "oauth2");
    shirofilter.setfilterchaindefinitionmap(filtermap);

    return shirofilter;
}

配置oauth2filter为过滤类 过滤对象处/webjars/** /druid/** /login 外的所有

3.过滤类oauth2filter 继承 authenticationfilter 重写以下方法

/**
 * 验证是否有效token
 * @param request re
 * @param response res
 * @return 验证token
 * @throws exception
 */
@override
protected boolean onaccessdenied(servletrequest request, servletresponse response) throws exception {
    //获取请求token,如果token不存在,直接返回401
    string token = getrequesttoken((httpservletrequest) request);
    if(stringutils.isblank(token)){
        httpservletresponse httpresponse = (httpservletresponse) response;
        httpresponse.setcontenttype("application/json;charset=utf-8");
        httpresponse.setheader("access-control-allow-credentials", "true");
        httpresponse.setheader("access-control-allow-origin", httpcontextutils.getorigin());

        string json = new gson().tojson(new result().error(errorcode.unauthorized));

        httpresponse.getwriter().print(json);

        return false;
    }

    return executelogin(request, response);
}

4.调用父类 executelogin 进行登录验证

protected boolean executelogin(servletrequest request, servletresponse response) throws exception {
    authenticationtoken token = this.createtoken(request, response);
    if (token == null) {
        string msg = "createtoken method implementation returned null. a valid non-null authenticationtoken must be created in order to execute a login attempt.";
        throw new illegalstateexception(msg);
    } else {
        try {
            subject subject = this.getsubject(request, response);
            subject.login(token);
            return this.onloginsuccess(token, subject, request, response);
        } catch (authenticationexception var5) {
            return this.onloginfailure(token, var5, request, response);
        }
    }
}

5.subject.login(token); 进行登录

login方法被delegatingsubject重写

public void login(authenticationtoken token) throws authenticationexception {
    **
    subject subject = this.securitymanager.login(this, token);
    **
}

6.securitymanager.login(this, token) login被defaultsecuritymanager

接下来几步没那么重要省略部分

7.modularrealmauthenticator authenticationinfo 授权信息获取方法

protected authenticationinfo doauthenticate(authenticationtoken authenticationtoken) throws authenticationexception {
    this.assertrealmsconfigured();
    collection<realm> realms = this.getrealms();
    return realms.size() == 1 ? this.dosinglerealmauthentication((realm)realms.iterator().next(), authenticationtoken) : this.domultirealmauthentication(realms, authenticationtoken);
}

getrealms 获取我们自己重写的realms类,主要用户获取用户信息

8.接下来则进入我们自己写的realms类 我的类叫oauth2realm

/**
 * 认证(登录时调用)
 */
@override
protected authenticationinfo dogetauthenticationinfo(authenticationtoken token) throws authenticationexception {
    string accesstoken = (string) token.getprincipal();

    //根据accesstoken,查询用户信息
    sysusertokenentity tokenentity = shiroservice.getbytoken(accesstoken);
    //token失效
    if(tokenentity == null || tokenentity.getexpiredate().gettime() < system.currenttimemillis()){
        throw new incorrectcredentialsexception(messageutils.getmessage(errorcode.token_invalid));
    }

    //查询用户信息
    sysuserentity userentity = shiroservice.getuser(tokenentity.getuserid());

    //转换成userdetail对象
    userdetail userdetail = convertutils.sourcetotarget(userentity, userdetail.class);

    //获取用户对应的部门数据权限
    list<long> deptidlist = shiroservice.getdatascopelist(userdetail.getid());
    userdetail.setdeptidlist(deptidlist);

    //账号锁定
    if(userdetail.getstatus() == 0){
        throw new lockedaccountexception(messageutils.getmessage(errorcode.account_lock));
    }

    simpleauthenticationinfo info = new simpleauthenticationinfo(userdetail, accesstoken, getname());
    return info;
}

负责获取用户信息的方法

这并不是登录的过程,而是授权过滤的过程,通过token到数据库查询是否有这个用户,且没有过期,则证明已经登录。

总结

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