spring security3 扩展验证码

security的登录参数验证主要是经过UsernamePasswordAuthenticationFilter过滤器

 

所以我们自己写个新的实现类类继承UsernamePasswordAuthenticationFilter,验证码工具我是使用jcaptcha,相信大家对这个也不会感觉陌生吧,至于网上也有很多这样的例子来演示如何扩展了

 

先来写个实现类继承UsernamePasswordAuthenticationFilter

 

/**
 * 重载SECURITY3的UsernamePasswordAuthenticationFilter的attemptAuthentication,
 * obtainUsername,obtainPassword方法(完善逻辑) 增加验证码校验模块 添加验证码属性 添加验证码功能开关属性
 *
 * @author shadow
 * @email [email protected]
 * @create 2012.04.28
 */
public class UsernamePasswordAuthenticationExtendFilter extends
        UsernamePasswordAuthenticationFilter {

    // 验证码字段
    private String validateCodeParameter = "validateCode";
    // 是否开启验证码功能
    private boolean openValidateCode = false;

    @Override
    public Authentication attemptAuthentication(HttpServletRequest request,
            HttpServletResponse response) throws AuthenticationException {
        // 只接受POST方式传递的数据
        if (!"POST".equals(request.getMethod()))
            throw new MethodErrorException("不支持非POST方式的请求!");

        // 开启验证码功能的情况
        if (isOpenValidateCode())
            checkValidateCode(request);

        // 获取Username和Password
        String username = obtainUsername(request);
        String password = obtainPassword(request);

        // UsernamePasswordAuthenticationToken实现Authentication校验
        UsernamePasswordAuthenticationToken authRequest = new UsernamePasswordAuthenticationToken(
                username, password);

        // 允许子类设置详细属性
        setDetails(request, authRequest);

        // 运行UserDetailsService的loadUserByUsername 再次封装Authentication
        return this.getAuthenticationManager().authenticate(authRequest);
    }

    // 匹对验证码的正确性
    public void checkValidateCode(HttpServletRequest request) {

        String jcaptchaCode = obtainValidateCodeParameter(request);
        if (null == jcaptchaCode)
            throw new ValidateCodeException("验证码超时,请重新获取!");

        boolean b = CaptchaServiceSingleton.getInstance()
                .validateResponseForID(request.getSession().getId(),
                        jcaptchaCode);
        if (!b)
            throw new ValidateCodeException("验证码不正确,请重新输入!");
    }

    public String obtainValidateCodeParameter(HttpServletRequest request) {
        Object obj = request.getParameter(getValidateCodeParameter());
        return null == obj ? "" : obj.toString().trim();
    }

    @Override
    protected String obtainUsername(HttpServletRequest request) {
        Object obj = request.getParameter(getUsernameParameter());
        return null == obj ? "" : obj.toString().trim();
    }

    @Override
    protected String obtainPassword(HttpServletRequest request) {
        Object obj = request.getParameter(getPasswordParameter());
        return null == obj ? "" : obj.toString().trim();
    }

    public String getValidateCodeParameter() {
        return validateCodeParameter;
    }

    public void setValidateCodeParameter(String validateCodeParameter) {
        this.validateCodeParameter = validateCodeParameter;
    }

    public boolean isOpenValidateCode() {
        return openValidateCode;
    }

    public void setOpenValidateCode(boolean openValidateCode) {
        this.openValidateCode = openValidateCode;
    }

}

很明显我们在获取username跟password之前执行一个checkValidateCode()的方法,这里就是先比较验证码,如果失败就直接抛出ValidateCodeException,这个异常自己定义个,

 

只要继承AuthenticationException就可以了

 

 

 

校验成功就直接往下执行比较username,password,然后配置xml的时候class的指向就用自己新的filter,过滤链中使用新 的filter替换掉UsernamePasswordAuthenticationFilter实现类的位置,下面是我自己的xml配置

 

过滤链里的serverCustomUsernamePasswordAuthenticationFilter实现换成是我们自己刚写的实现类,至于com.shadow.security.handler.LoginSuccessHandler和

 

com.shadow.security.handler.LoginFailureHandler这里自己实现一个AuthenticationSuccessHandler接口里面逻辑根据项目需求来设计

 

<!-- 登录认证过滤器-->
    <bean id="usernamePasswordAuthenticationFilter"
        class="com.shadow.security.service.UsernamePasswordAuthenticationExtendFilter">
        <property name="authenticationManager"
            ref="authenticationManager" />
        <property name="sessionAuthenticationStrategy"
            ref="concurrentSessionControlStrategy" />
        <property name="usernameParameter" value="username" />
        <property name="passwordParameter" value="password" />
        <property name="validateCodeParameter" value="validateCode" />
        <property name="openValidateCode" value="true" />
        <property name="filterProcessesUrl" value="/login" />
        <property name="rememberMeServices" ref="rememberMeServices" />
        <property name="authenticationSuccessHandler">
            <bean
                class="com.shadow.security.handler.LoginSuccessHandler">
                <property name="indexUrl" value="/index.jsp" />
            </bean>
        </property>
        <property name="authenticationFailureHandler">
            <bean
                class="com.shadow.security.handler.LoginFailureHandler" />
        </property>
    </bean>

 

至于其他的依赖属性注入就自己根据项目来添加吧,这里就不详细说明了