springboot1.5.x 第三部分 浏览器用户名密码加入验证码

验证码功能就是加入一个过滤器

/**
 * 
 */
package com.imooc.security.core.validate.code;

import java.io.IOException;
import java.util.HashSet;
import java.util.Set;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.security.web.authentication.AuthenticationFailureHandler;
import org.springframework.social.connect.web.HttpSessionSessionStrategy;
import org.springframework.social.connect.web.SessionStrategy;
import org.springframework.util.AntPathMatcher;
import org.springframework.web.bind.ServletRequestBindingException;
import org.springframework.web.bind.ServletRequestUtils;
import org.springframework.web.context.request.ServletWebRequest;
import org.springframework.web.filter.OncePerRequestFilter;

import com.imooc.security.core.properties.SecurityProperties;

/**
 * @author zhailiang
 *
 */
public class ValidateCodeFilter extends OncePerRequestFilter implements InitializingBean {
    
    private AuthenticationFailureHandler authenticationFailureHandler;
    
    private SessionStrategy sessionStrategy = new HttpSessionSessionStrategy();
    
    private Set<String> urls = new HashSet<>();
    
    private SecurityProperties securityProperties;
    
    private AntPathMatcher pathMatcher = new AntPathMatcher();
    
    @Override
    public void afterPropertiesSet() throws ServletException {
        super.afterPropertiesSet();
        String[] configUrls = StringUtils.splitByWholeSeparatorPreserveAllTokens(securityProperties.getCode().getImage().getUrl(), ",");
        for (String configUrl : configUrls) {
            urls.add(configUrl);
        }
        urls.add("/authentication/form");
    }

    /* (non-Javadoc)
     * @see org.springframework.web.filter.OncePerRequestFilter#doFilterInternal(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, javax.servlet.FilterChain)
     */
    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
            throws ServletException, IOException {
        
        boolean action = false;
        for (String url : urls) {
            if(pathMatcher.match(url, request.getRequestURI())){
                action = true;
            }
        }
        
        if(action) {
            
            try {
                validate(new ServletWebRequest(request));
            } catch (ValidateCodeException e) {
                authenticationFailureHandler.onAuthenticationFailure(request, response, e);
                return;
            }
            
        }
        
        filterChain.doFilter(request, response);
        
    }

    private void validate(ServletWebRequest request) throws ServletRequestBindingException {
        
        ImageCode codeInSession = (ImageCode) sessionStrategy.getAttribute(request,
                ValidateCodeController.SESSION_KEY);

        String codeInRequest = ServletRequestUtils.getStringParameter(request.getRequest(), "imageCode");

        if (StringUtils.isBlank(codeInRequest)) {
            throw new ValidateCodeException("验证码的值不能为空");
        }
        
        if(codeInSession == null){
            throw new ValidateCodeException("验证码不存在");
        }

        if(codeInSession.isExpried()){
            sessionStrategy.removeAttribute(request, ValidateCodeController.SESSION_KEY);
            throw new ValidateCodeException("验证码已过期");
        }
        
        if(!StringUtils.equals(codeInSession.getCode(), codeInRequest)) {
            throw new ValidateCodeException("验证码不匹配");
        }
        
        sessionStrategy.removeAttribute(request, ValidateCodeController.SESSION_KEY);
    }

    public AuthenticationFailureHandler getAuthenticationFailureHandler() {
        return authenticationFailureHandler;
    }

    public void setAuthenticationFailureHandler(AuthenticationFailureHandler authenticationFailureHandler) {
        this.authenticationFailureHandler = authenticationFailureHandler;
    }

    public SessionStrategy getSessionStrategy() {
        return sessionStrategy;
    }

    public void setSessionStrategy(SessionStrategy sessionStrategy) {
        this.sessionStrategy = sessionStrategy;
    }

    public Set<String> getUrls() {
        return urls;
    }

    public void setUrls(Set<String> urls) {
        this.urls = urls;
    }

    public SecurityProperties getSecurityProperties() {
        return securityProperties;
    }

    public void setSecurityProperties(SecurityProperties securityProperties) {
        this.securityProperties = securityProperties;
    }
    

}