五、SpringSecurity图片验证码

一、开发生成图形验证码接口

1.根据随机数生成图片

因为不管是手机APP还是浏览器都可能会用到,所以我写到了core模块。

2.将随机数存到Session中
3.再将生成的图片写到接口的响应中

首先定义一个实体类,封装验证码的信息,其中包含图片信息,验证码,以及过期时间

package com.tinner.security.core.validate.code;

import java.awt.image.BufferedImage;
import java.time.LocalDateTime;

public class ImageCode {

    private BufferedImage image;

    private String code;

    private LocalDateTime expireTime;

    public ImageCode(BufferedImage image, String code, int expireTime) {
        this.image = image;
        this.code = code;
        this.expireTime = LocalDateTime.now().plusSeconds(expireTime);
    }

    public boolean isExpried(){
        return LocalDateTime.now().isAfter(expireTime);
    }

    public BufferedImage getImage() {
        return image;
    }

    public void setImage(BufferedImage image) {
        this.image = image;
    }

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }

    public LocalDateTime getExpireTime() {
        return expireTime;
    }

    public void setExpireTime(LocalDateTime expireTime) {
        this.expireTime = expireTime;
    }
}

注意:在重写构造方法的时候,入参是一个int类型的一个过期时间,就是一个秒,一般过期时间都是60秒,然后在构造方法里面 this.expireTime = LocalDateTime.now().plusSeconds(expireTime);这个代码指的是将过期时间设为一个未来的一个时间。这个类中还有一个判断验证码是否过期的一个方法isExpried。
代码如下


@RestController
public class ValidateCodeController {

    private static final String SESSION_KEY = "SESSION_KEY_IMAGE_CODE";

    private SessionStrategy sessionStrategy = new HttpSessionSessionStrategy();

    @GetMapping("/code/image")
    public void createCode(HttpServletRequest request, HttpServletResponse response) throws IOException {
        ImageCode imageCode = createImageCode(request);
        sessionStrategy.setAttribute(new ServletWebRequest(request),SESSION_KEY,imageCode);
        ImageIO.write(imageCode.getImage(),"JPEG",response.getOutputStream());
    }

    private ImageCode createImageCode(HttpServletRequest request) {
        int width = 67;
        int height = 23;
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

        Graphics g = image.getGraphics();

        Random random = new Random();

        g.setColor(getRandColor(200, 250));
        g.fillRect(0, 0, width, height);
        g.setFont(new Font("Times New Roman", Font.ITALIC, 20));
        g.setColor(getRandColor(160, 200));
        for (int i = 0; i < 155; i++) {
            int x = random.nextInt(width);
            int y = random.nextInt(height);
            int xl = random.nextInt(12);
            int yl = random.nextInt(12);
            g.drawLine(x, y, x + xl, y + yl);
        }

        String sRand = "";
        for (int i = 0; i < 4; i++) {
            String rand = String.valueOf(random.nextInt(10));
            sRand += rand;
            g.setColor(new Color(20 + random.nextInt(110), 20 + random.nextInt(110), 20 + random.nextInt(110)));
            g.drawString(rand, 13 * i + 6, 16);
        }

        g.dispose();

        return new ImageCode(image, sRand, 60);
    }

    /**
     * 生成随机背景条纹
     *
     * @param fc
     * @param bc
     * @return
     */
    private Color getRandColor(int fc, int bc) {
        Random random = new Random();
        if (fc > 255) {
            fc = 255;
        }
        if (bc > 255) {
            bc = 255;
        }
        int r = fc + random.nextInt(bc - fc);
        int g = fc + random.nextInt(bc - fc);
        int b = fc + random.nextInt(bc - fc);
        return new Color(r, g, b);
    }

}

二、在认证流程中加入图形验证码的校验

在SpringSecurity并没有提供图像验证码的过滤器,但是我们可以在过滤器链中加入我们自己写的图形过滤器。就是在UsernamePasswordAuthenticationFilter过滤器之前加一个自己写的过滤器。在自己写的过滤器里面去执行校验的逻辑,如果验证通过则将请求通过,如果验证失败就抛出异常。
代码:

package com.tinner.security.core.validate.code;

import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.web.authentication.AuthenticationFailureHandler;
import org.springframework.social.connect.web.HttpSessionSessionStrategy;
import org.springframework.social.connect.web.SessionStrategy;
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 javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class ValidateCodeFilter extends OncePerRequestFilter {

    public AuthenticationFailureHandler getAuthenticationFailureHandler() {
        return authenticationFailureHandler;
    }

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

    private AuthenticationFailureHandler authenticationFailureHandler;

    private SessionStrategy sessionStrategy = new HttpSessionSessionStrategy();

    @Override
    protected void doFilterInternal(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, FilterChain filterChain) throws ServletException, IOException {
        if (StringUtils.equals("/authentication/form",httpServletRequest.getRequestURI()) && StringUtils.equalsIgnoreCase(httpServletRequest.getMethod(),"post")){
            try {
                validate(new ServletWebRequest(httpServletRequest));
            }catch (ValidateCodeException e){
                authenticationFailureHandler.onAuthenticationFailure(httpServletRequest,httpServletResponse,e);
                return ;
            }
        }

        filterChain.doFilter(httpServletRequest,httpServletResponse);

    }

    /**
     * 校验逻辑
     * @param
     */
    public 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);

    }
}

其中我还定义了一个异常信息:

public class ValidateCodeException extends AuthenticationException {

    public ValidateCodeException(String msg) {
        super(msg);
    }

    private static final long serialVersionUID = 1422465195260228715L;
}

我来继承了AuthenticationException ,这个异常是安全框架默认提供的一个异常。
然后是重写页面index.html




    
    登录


    

标准登录页面

表单登录

用户名:
密码:
验证码:

三、配置SpringSecurity的config

package com.tinner.security.browser;

import com.tinner.security.core.properties.SecurityProperties;
import com.tinner.security.core.validate.code.ValidateCodeController;
import com.tinner.security.core.validate.code.ValidateCodeFilter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.authentication.AuthenticationFailureHandler;
import org.springframework.security.web.authentication.AuthenticationSuccessHandler;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

import java.io.File;

/**
 * WebSecurityConfigurerAdapter是springSecurity提供的一个适配器类
 */
@Configuration
public class BrowserSecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private SecurityProperties securityProperties;

    @Autowired
    private AuthenticationSuccessHandler tinnerAuthentivationSuccessHandler;

    @Autowired
    private AuthenticationFailureHandler tinnerAuthentivationFailureHandler;

    @Bean
    public PasswordEncoder passwordEncoder(){
        return new BCryptPasswordEncoder();
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {

        ValidateCodeFilter validateCodeFilter = new ValidateCodeFilter();
        validateCodeFilter.setAuthenticationFailureHandler(tinnerAuthentivationFailureHandler);
//        super.configure(http);
        //实现的效果:让它去表单登录,而不是alert框
        http.addFilterBefore(validateCodeFilter, UsernamePasswordAuthenticationFilter.class)
                .formLogin()
                .loginPage("/authentication/require")
                .loginProcessingUrl("/authentication/form")
                .successHandler(tinnerAuthentivationSuccessHandler)
                .failureHandler(tinnerAuthentivationFailureHandler)
//        http.httpBasic()
                .and()
                .authorizeRequests()//对请求进行授权
                .antMatchers("/authentication/require",securityProperties.getBrowser().getLoginPage(),"/code/image").permitAll()
                .anyRequest()//任何请求
                .authenticated()
        .and().csrf().disable();//都需要身份认证

    }
}

这样,项目就可以运行了,但是在我登录失败之后它会弹出堆栈信息,并不能显示出我的校验的信息。因此我还得重写我之前的TinnerAuthentivationFailureHandler的onAuthenticationFailure方法,之前是将异常全部写入httpServletResponse中,现在只将异常的message写进 去即可

package com.tinner.security.browser.authentication;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.tinner.security.browser.support.SimpleResponse;
import com.tinner.security.core.properties.LoginType;
import com.tinner.security.core.properties.SecurityProperties;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.authentication.AuthenticationFailureHandler;
import org.springframework.security.web.authentication.SimpleUrlAuthenticationFailureHandler;
import org.springframework.stereotype.Component;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Component("tinnerAuthentivationFailureHandler")
//public class TinnerAuthentivationFailureHandler implements AuthenticationFailureHandler {

public class TinnerAuthentivationFailureHandler extends SimpleUrlAuthenticationFailureHandler {

    private Logger LOGGER = LoggerFactory.getLogger(this.getClass());

    @Autowired
    private ObjectMapper objectMapper;

    @Autowired
    private SecurityProperties securityProperties;


    @Override
    public void onAuthenticationFailure(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, AuthenticationException e) throws IOException, ServletException {
        LOGGER.info("登录失败");
        if (LoginType.JSON.equals(securityProperties.getBrowser().getLoginType())){
            httpServletResponse.setStatus(HttpStatus.INTERNAL_SERVER_ERROR.value());
            httpServletResponse.setContentType("application/json;charset=UTF-8");
            httpServletResponse.getWriter().write(objectMapper.writeValueAsString(new SimpleResponse(e.getMessage())));
        }else{
            super.onAuthenticationFailure(httpServletRequest,httpServletResponse,e);
        }

    }
}

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