1.新建图形验证码实体类：
/**
* 图片验证码
*
* @author zhaohaibin
*/
@Data
public class ImageCode {
private BufferedImage image;
private String code;
private LocalDateTime expireTime;
/**
* @param image
* @param code
* @param expireIn - 超时时间（秒）
*/
public ImageCode(BufferedImage image, String code, int expireIn) {
this.image = image;
this.code = code;
this.expireTime = LocalDateTime.now().plusSeconds(expireIn);
}
public ImageCode(BufferedImage image, String code, LocalDateTime expireTime) {
this.image = image;
this.code = code;
this.expireTime = expireTime;
}
/**
* 是否过期验证
*
* @return
*/
public boolean isExpried() {
return LocalDateTime.now().isAfter(expireTime);
}
}
2.新建图形验证码控制器及生成逻辑：
/**
* 验证码控制器
*
* @author zhaohaibin
*/
@RestController
public class ValidateCodeController {
public 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());
}
/**
* 生成图形验证码
*
* @param request
* @return
*/
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);
}
}
3.自定义验证码拦截器：
/**
* 自定义验证码拦截器
* @author zhaohaibin
*/
@Data
@Slf4j
public class ValidateCodeFilter extends OncePerRequestFilter {
private AuthenticationFailureHandler authenticationFailureHandler;
private SessionStrategy sessionStrategy = new HttpSessionSessionStrategy();
@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
// /demo：项目名前缀
if (StringUtils.equals("/demo/authentication/form", request.getRequestURI())
&& StringUtils.equalsIgnoreCase(request.getMethod(), "post")) {
try {
validate(new ServletWebRequest(request));
} catch (ValidateCodeException e) {
response.setContentType("application/json;charset=UTF-8");
authenticationFailureHandler.onAuthenticationFailure(request, response, e);
return;
}
}
// 否则执行后续过滤
filterChain.doFilter(request, response);
}
/**
* 验证验证码
*
* @param request
* @throws ServletRequestBindingException
* @throws ValidateCodeException
*/
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 (null == codeInSession) {
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);
}
}
ValidateCodeException：
/**
* 验证码自定义异常类
*
* @author zhaohaibin
*/
public class ValidateCodeException extends AuthenticationException {
private static final long serialVersionUID = -6740942343625021592L;
public ValidateCodeException(String msg) {
super(msg);
}
}
4.更新WebSecurityConfig：
@Override
protected void configure(HttpSecurity http) throws Exception {
ValidateCodeFilter validateCodeFilter = new ValidateCodeFilter();
validateCodeFilter.setAuthenticationFailureHandler(demoAuthenticationFailureHandler);
// 默认/表单登录方式
// http.httpBasic()
// 在默认UsernamePasswordAuthenticationFilter前增加自定义验证码校验拦截，并传入自定义失败对象
http.addFilterBefore(validateCodeFilter, UsernamePasswordAuthenticationFilter.class)
.formLogin()
// 自定义登录页面
.loginPage("/authentication/require")
.loginProcessingUrl("/authentication/form")
.successHandler(demoAuthenticationSuccessHandler)
.failureHandler(demoAuthenticationFailureHandler)
.and()
// 对任何请求授权
.authorizeRequests()
// 匹配页面授权所有权限
.antMatchers(
// API
"/swagger-ui.html",
// 默认登录页
"/authentication/require",
// 自定义登录页（demoLogin）
securityProperties.getBrowser().getLoginPage(),
"/code/image").permitAll()
// 任何请求
.anyRequest()
// 都需要被认证
.authenticated()
.and()
// 请求伪造防护功能关闭
.csrf().disable();
}
5.更新登录页面：
<div><label>验证码</label><input type="text" name="imageCode" placeholder="请输入验证码"/><img src="code/image" alt=""></div>
问题排查：
HttpSessionSessionStrategy对应maven引入：
<!-- https://mvnrepository.com/artifact/org.springframework.social/spring-social-web -->
<dependency>
<groupId>org.springframework.social</groupId>
<artifactId>spring-social-web</artifactId>
<version>1.1.6.RELEASE</version>
</dependency>
总是跳转"引导至登录页"，注释登录类型配置：
# security 默认登录页面配置
demo:
security:
browser:
loginPage: "/demoLogin.html"
# loginType: "REDIRECT"
