Authorization源码解析

1、首先调用 Subject.isPermitted*/hasRole* 接口,其会委托给SecurityManager。SecurityManager 接着会委托给 Authorizer;

Authorizer是真正的授权者,如果调用如isPermitted(“user:view”),其首先会通过• PermissionResolver 把字符串转换成相应的 Permission 实例;

DelegatingSubject
public boolean hasRole(String roleIdentifier) {
        return hasPrincipals() && securityManager.hasRole(getPrincipals(), roleIdentifier);
    }

2、SecurityManager 接着会委托给 Authorizer;

this.authorizer = new ModularRealmAuthorizer();
public
boolean hasRole(PrincipalCollection principals, String roleIdentifier) { return this.authorizer.hasRole(principals, roleIdentifier); }

3、ModularRealmAuthorizer 进行多 Realm 匹配流程

1)首先检查相应的 Realm 是否实现了实现了Authorizer;
2)如果实现了 Authorizer,那么接着调用其相应的isPermitted*/hasRole* 接口进行匹配

3)如果有一个Realm匹配那么将返回 true,否则返回 false。

public boolean hasRole(PrincipalCollection principals, String roleIdentifier) {
        assertRealmsConfigured();
        for (Realm realm : getRealms()) {
            if (!(realm instanceof Authorizer)) continue;
            if (((Authorizer) realm).hasRole(principals, roleIdentifier)) {
                return true;
            }
        }
        return false;
    }

 4、AuthorizingRealm中根据用户名去数据源中获取角色/权限,并进行判断

public boolean hasRole(PrincipalCollection principal, String roleIdentifier) {
        AuthorizationInfo info = getAuthorizationInfo(principal);
        return hasRole(roleIdentifier, info);
    }

    protected boolean hasRole(String roleIdentifier, AuthorizationInfo info) {
        return info != null && info.getRoles() != null && info.getRoles().contains(roleIdentifier);
    }

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转载自www.cnblogs.com/xiaoliangup/p/10460261.html