项目简介
基于Spring Cloud 的项目，Spring Cloud是在Spring Boot上搭建的所以按照Spring Boot的方式来写
Spring Security 配置
继承 WebSecurityConfigurerAdapter ,重写configure(HttpSecurity http)配置相关权限以及重写拦截器
http.authorizeRequests()
.antMatchers("/auth/**").permitAll()
.anyRequest().authenticated().and()
//证书 认证 自动登陆
.addFilterBefore(authTokenFilter, UsernamePasswordAuthenticationFilter.class)
//登陆以及权限控制Filter
......
;
自定义UsernamePasswordAuthenticationFilter
自定义 UsernamePasswordAuthenticationFilter 实现自动登陆
创建Authentication 模拟登陆
Authentication authentication = new UsernamePasswordAuthenticationToken(auth, token);
SecurityContextHolder.getContext().setAuthentication(authentication);;
自定义FilterSecurityInterceptor
Spring Security 是通过这个过滤器来实现 Http资源安全过滤的。
获取资源权限
FilterSecurityInterceptor继承自 AbstractSecurityInterceptor ,源码中的其中beforeInvocation方法的一段代码是：
Collection<ConfigAttribute> attributes = this.obtainSecurityMetadataSource()
.getAttributes(object);
这个方法是来获取资源权限 ，可以重写SecurityMetadataSource obtainSecurityMetadataSource(){}方法来实现，传入一个FilterInvocation对象，返回一个Collection<ConfigAttribute>对象。
这个对象中可以获取到request， response等内置对象，可以通过一下代码来匹配
RequestMatcher requestMatcher = new AntPathRequestMatcher("/manager/**");
if(requestMatcher.matches(request)){
return RESOURCE
}
ConfigAttribute 可以通过new SecurityConfig((String)input) 来创建
编写认证提供者
重写 AuthenticationManager 实现，用户登陆可以放这里面
Authentication authenticate(Authentication authentication)
throws AuthenticationException;
用来生成Authentication， 原始的够用的话直接注入设置就好。
用户是否有获取资源权限
AbstructSecurityIntercepter 中的一下方法来判断用户权限是否可以拥有该资源
this.accessDecisionManager.decide(authenticated, object, attributes);
为了达到自定义控制的目的，我们需要实现AccessDecisionManager接口，来重写这个方法,如果判断不通过 decide方法可以抛出AccessDeniedException，来阻止用户访问
/**
* 判断用户是否有访问资源权限
* @param authentication 用户Auth
* @param object FilterInvocation对象
* @param configAttributes 资源所需权限
* @throws AccessDeniedException 无权限Exception
* @throws InsufficientAuthenticationException
*/
public void decide(Authentication authentication, Object object,
Collection<ConfigAttribute> configAttributes)
throws AccessDeniedException, InsufficientAuthenticationException {
if(access){
//允许通过
return;
}
//不允许角色访问
throw new AccessDeniedException("NO ALLOW");
}
JAVA 源码片
WebSecurityConfig
@Configuration
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
@Autowired
private AuthTokenFilter authTokenFilter;
@Autowired
private ApiPermissionSecurityFilter securityFilter;
protected void configure(HttpSecurity http) throws Exception {
http.authorizeRequests()
.antMatchers("/auth/**").permitAll()
.anyRequest().authenticated().and()
//证书 认证 自动登陆
.addFilterBefore(authTokenFilter, UsernamePasswordAuthenticationFilter.class)
//登陆以及权限控制Filter
.addFilterBefore(securityFilter, FilterSecurityInterceptor.class)
.csrf().disable()
//基于Token 不需要Session
.sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
;
}
}
AuthTokenFilter (自定义UsernamePasswordAuthenticationFilter)
@Component
public class AuthTokenFilter extends OncePerRequestFilter {
@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
String auth = request.getHeader("Authorization");
//用户登陆，暂不设置权限
Token token = new Token(auth, null);
Authentication authentication = new UsernamePasswordAuthenticationToken(auth, token);
SecurityContextHolder.getContext().setAuthentication(authentication);
filterChain.doFilter(request, response);
}
}
ApiPermissionSecurityFilter
@Component
public class ApiPermissionSecurityFilter extends AbstractSecurityInterceptor implements Filter {
@Autowired
private ApiInvocationSecurityMetadataSourceService apiInvocationSecurityMetadataSourceService;
@Autowired
private ApiAccessDecisionManager apiAccessDecisionManager;
@Autowired
private AuthenticationManager authenticationManager;
@PostConstruct
public void init(){
super.setAuthenticationManager(authenticationManager);
super.setAccessDecisionManager(apiAccessDecisionManager);
}
public void doFilter( ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException{
FilterInvocation fi = new FilterInvocation( request, response, chain );
invoke(fi);
}
public Class<? extends Object> getSecureObjectClass(){
return FilterInvocation.class;
}
public void invoke( FilterInvocation fi ) throws IOException, ServletException{
InterceptorStatusToken token = super.beforeInvocation(fi);
try{
fi.getChain().doFilter(fi.getRequest(), fi.getResponse());
}finally{
super.afterInvocation(token, null);
}
}
@Override
public SecurityMetadataSource obtainSecurityMetadataSource(){
return this.apiInvocationSecurityMetadataSourceService;
}
public void destroy(){
}
public void init( FilterConfig filterconfig ) throws ServletException{
}
}
ApiInvocationSecurityMetadataSourceService
/**
* 资源-权限控制对象
* Created by liang on 2017/3/17.
*/
@Component
public class ApiInvocationSecurityMetadataSourceService implements
FilterInvocationSecurityMetadataSource {
//缓存 英文名-权限
private static LoadingCache<String, Collection<ConfigAttribute>> permitMap = null;
//缓存 英文名-ODCINFO信息对象
private static LoadingCache<String, OdcInfo> odcInfoMap = null;
@PostConstruct
private void init() {
//资源启动时初始化 资源和角色权限
//缓存 英文名-权限 初始化
//缓存 英文名-ODCINFO
}
@Override
public Collection<ConfigAttribute> getAttributes(Object object) throws IllegalArgumentException {
FilterInvocation filterInvocation = (FilterInvocation) object;
//TODO 干你想干事情，下面是获取路径所具有的资源
return permitMap.get(getHttpRequest().getRequestURI());
}
@Override
public Collection<ConfigAttribute> getAllConfigAttributes() {
return new ArrayList<ConfigAttribute>();
}
@Override
public boolean supports(Class<?> aClass) {
//很重要，不然不起作用
return true;
}
}
ApiAccessDecisionManager
@Component
public class ApiAccessDecisionManager implements AccessDecisionManager {
/**
* 判断用户是否有访问资源权限
* @param authentication 用户Auth
* @param object FilterInvocation对象
* @param configAttributes 资源所需权限
* @throws AccessDeniedException 无权限Exception
*/
public void decide(Authentication authentication, Object object,
Collection<ConfigAttribute> configAttributes)
throws AccessDeniedException {
if(access){
//允许通过
return;
}
//不允许角色访问
throw new AccessDeniedException("NO ALLOW");
}
public boolean supports( ConfigAttribute attribute ){
return true;
}
public boolean supports(Class<?> clazz){
return true;
}
}
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