Kaptcha是谷歌开源的可高度配置的实用验证码生成工具。
一、验证码配置
加入依赖：
<dependency>
<groupId>com.github.penggle</groupId>
<artifactId>kaptcha</artifactId>
<version>2.3.2</version>
</dependency>
生成验证码配置：
@Configuration
public class KaptchaConfig {
//DefaultKaptcha是Producer的实现类
@Bean
public DefaultKaptcha producer() {
Properties properties = new Properties();
properties.put("kaptcha.border", "no");
properties.put("kaptcha.textproducer.font.color", "black");
properties.put("kaptcha.textproducer.char.space", "5");
properties.put("kaptcha.textproducer.font.names", "Arial,Courier,cmr10,宋体,楷体,微软雅黑");
Config config = new Config(properties);
DefaultKaptcha defaultKaptcha = new DefaultKaptcha();
defaultKaptcha.setConfig(config);
return defaultKaptcha;
}
}
新增验证码controller：
@Controller
@Slf4j
public class KaptchaController {
@Autowired
private Producer producer;
@GetMapping("/verify_code")
public Mono<Void> createVerifyCode(ServerWebExchange webExchange) throws IOException {
//生成验证码字符文本
String verifyCode = producer.createText();
log.info("生成的验证码：{}", verifyCode);
/**
* 将验证码保存到session中
*/
webExchange.getSession().map(webSession -> {
webSession.getAttributes().put("kaptchaVerifyCode",verifyCode);
return Mono.empty();
}).subscribe();
// 转换流信息写出
FastByteArrayOutputStream os = new FastByteArrayOutputStream();
BufferedImage image = producer.createImage(verifyCode);
try {
ImageIO.write(image, "jpeg", os);
} catch (IOException e) {
log.error("ImageIO write err", e);
return Mono.empty();
}
webExchange.getResponse().getHeaders().add("Content-type","image/jpeg");
/**
* 将验证码图片转成DataBuffer并写入到客户端
*/
Flux<DataBuffer> dataBufferFlux = DataBufferUtils.read(new ByteArrayResource(os.toByteArray()), webExchange.getResponse().bufferFactory(), 1024 * 8);
return webExchange.getResponse().writeAndFlushWith(t -> {
t.onSubscribe(new Subscription() { // 这步是必须的，不然可能生成不了验证码
@Override
public void request(long l) {
}
@Override
public void cancel() {
}
});
t.onNext(dataBufferFlux);
t.onComplete();
});
}
}
二、表单登录使用验证码
修改MyReactiveSecurityConfig配置类，将/verify_code放开权限校验：
@Bean
public SecurityWebFilterChain springSecurityFilterChain(ServerHttpSecurity http) {
http
.authorizeExchange(exchanges -> exchanges
.pathMatchers(LOGIN_PAGE).permitAll()
.pathMatchers("/verify_code").permitAll()
.anyExchange().authenticated()
)
// .httpBasic().disable()
// .formLogin().disable()
.formLogin()
.loginPage(LOGIN_PAGE)
.and()
// .loginPage(LOGIN_PAGE)
// .and()
.csrf().disable();
http.addFilterAt(authenticationManager(), SecurityWebFiltersOrder.FORM_LOGIN);
return http.build();
}
自定义AuthenticationWebFilter：
@Bean
public ReactiveAuthenticationManager userDetailsRepositoryReactiveAuthenticationManager() {
UserDetailsRepositoryReactiveAuthenticationManager manager = new UserDetailsRepositoryReactiveAuthenticationManager(this.reactiveUserDetailsService);
manager.setPasswordEncoder(passwordEncoder());
manager.setUserDetailsPasswordService(this.userDetailsPasswordService);
return manager;
}
@Bean
public AuthenticationWebFilter authenticationManager() {
AuthenticationWebFilter authenticationFilter = new AuthenticationWebFilter(userDetailsRepositoryReactiveAuthenticationManager());
authenticationFilter.setRequiresAuthenticationMatcher(ServerWebExchangeMatchers.pathMatchers(HttpMethod.POST, LOGIN_PAGE));
authenticationFilter.setAuthenticationFailureHandler(new RedirectServerAuthenticationFailureHandler(LOGIN_PAGE + "?error"));
authenticationFilter.setAuthenticationConverter(new KaptchServerAuthenticationConverter());
authenticationFilter.setAuthenticationSuccessHandler(new RedirectServerAuthenticationSuccessHandler("/"));
authenticationFilter.setSecurityContextRepository(new WebSessionServerSecurityContextRepository());
return authenticationFilter;
}
增加验证码解析类：
@Slf4j
public class KaptchServerAuthenticationConverter extends ServerFormLoginAuthenticationConverter {
private ObjectMapper objectMapper = new ObjectMapper();
private String usernameParameter = "username";
private String passwordParameter = "password";
private String kaptchaParamter = "kaptchaVerifyCode";
public KaptchServerAuthenticationConverter() {
}
public KaptchServerAuthenticationConverter(String usernameParameter, String passwordParameter,String kaptchaParamter) {
this.usernameParameter = usernameParameter;
this.passwordParameter = passwordParameter;
this.kaptchaParamter = kaptchaParamter;
}
public Mono<Authentication> apply(ServerWebExchange exchange) {
return exchange.getFormData().map(data -> {
return data.getFirst(kaptchaParamter);
}).zipWith(exchange.getSession().map(webSession -> {
return webSession.getAttribute(kaptchaParamter);
})).map(t-> {
String t1 = t.getT1();
Object t2 = t.getT2();
log.info("前端传来的验证码：{}，session中的验证码:{}", t1, t2);
if (!Objects.equals(t1, t2)) {
throw new KaptchaAuthenticationException("验证码不正确");
} else {
return Mono.empty();
}
}).flatMap(t -> {
return super.apply(exchange);
});
}
}
public class KaptchaAuthenticationException extends AuthenticationException {
public KaptchaAuthenticationException(String msg, Throwable cause) {
super(msg, cause);
}
public KaptchaAuthenticationException(String msg) {
super(msg);
}
}
调用父类super.apply解析用户名和密码，在解析用户名和密码之前对比前端传过来的验证码和WebSession中的验证码是否一致。不一致则抛出KaptchaAuthenticationException。
修改登录页doLogin.html：
<!DOCTYPE html>
<html lang="en">
<!-- https://codepen.io/danielkvist/pen/LYNVyPL -->
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
:root {
/* COLORS */
--white: #e9e9e9;
--gray: #333;
--blue: #0367a6;
--lightblue: #008997;
/* RADII */
--button-radius: 0.7rem;
/* SIZES */
--max-width: 758px;
--max-height: 420px;
font-size: 16px;
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
}
body {
align-items: center;
background-color: var(--white);
background: url("https://res.cloudinary.com/dbhnlktrv/image/upload/v1599997626/background_oeuhe7.jpg");
/* 决定背景图像的位置是在视口内固定，或者随着包含它的区块滚动。 */
/* https://developer.mozilla.org/zh-CN/docs/Web/CSS/background-attachment */
background-attachment: fixed;
background-position: center;
background-repeat: no-repeat;
background-size: cover;
display: grid;
height: 100vh;
place-items: center;
}
.form__title {
font-weight: 300;
margin: 0;
margin-bottom: 1.25rem;
}
.link {
color: var(--gray);
font-size: 0.9rem;
margin: 1.5rem 0;
text-decoration: none;
}
.container {
background-color: var(--white);
border-radius: var(--button-radius);
box-shadow: 0 0.9rem 1.7rem rgba(0, 0, 0, 0.25),
0 0.7rem 0.7rem rgba(0, 0, 0, 0.22);
height: var(--max-height);
max-width: var(--max-width);
overflow: hidden;
position: relative;
width: 100%;
}
.container__form {
height: 100%;
position: absolute;
top: 0;
transition: all 0.6s ease-in-out;
}
.container--signin {
left: 0;
width: 50%;
z-index: 2;
}
.container.right-panel-active .container--signin {
transform: translateX(100%);
}
.container--signup {
left: 0;
opacity: 0;
width: 50%;
z-index: 1;
}
.container.right-panel-active .container--signup {
animation: show 0.6s;
opacity: 1;
transform: translateX(100%);
z-index: 5;
}
.container__overlay {
height: 100%;
left: 50%;
overflow: hidden;
position: absolute;
top: 0;
transition: transform 0.6s ease-in-out;
width: 50%;
z-index: 100;
}
.container.right-panel-active .container__overlay {
transform: translateX(-100%);
}
.overlay {
background-color: var(--lightblue);
background: url("https://cdn.pixabay.com/photo/2018/08/14/13/23/ocean-3605547_1280.jpg");
background-attachment: fixed;
background-position: center;
background-repeat: no-repeat;
background-size: cover;
height: 100%;
left: -100%;
position: relative;
transform: translateX(0);
transition: transform 0.6s ease-in-out;
width: 200%;
}
.container.right-panel-active .overlay {
transform: translateX(50%);
}
.overlay__panel {
align-items: center;
display: flex;
flex-direction: column;
height: 100%;
justify-content: center;
position: absolute;
text-align: center;
top: 0;
transform: translateX(0);
transition: transform 0.6s ease-in-out;
width: 50%;
}
.overlay--left {
transform: translateX(-20%);
}
.container.right-panel-active .overlay--left {
transform: translateX(0);
}
.overlay--right {
right: 0;
transform: translateX(0);
}
.container.right-panel-active .overlay--right {
transform: translateX(20%);
}
.btn {
background-color: var(--blue);
background-image: linear-gradient(90deg, var(--blue) 0%, var(--lightblue) 74%);
border-radius: 20px;
border: 1px solid var(--blue);
color: var(--white);
cursor: pointer;
font-size: 0.8rem;
font-weight: bold;
letter-spacing: 0.1rem;
padding: 0.9rem 4rem;
text-transform: uppercase;
transition: transform 80ms ease-in;
}
.form>.btn {
margin-top: 1.5rem;
}
.btn:active {
transform: scale(0.95);
}
.btn:focus {
outline: none;
}
.form {
background-color: var(--white);
display: flex;
align-items: center;
justify-content: center;
flex-direction: column;
padding: 0 3rem;
height: 100%;
text-align: center;
}
.input {
background-color: #fff;
border: none;
padding: 0.9rem 0.9rem;
margin: 0.5rem 0;
width: 88%;
}
@keyframes show {
0%,
49.99% {
opacity: 0;
z-index: 1;
}
50%,
100% {
opacity: 1;
z-index: 5;
}
}
</style>
</head>
<body>
<div class="container right-panel-active">
<!-- Sign In -->
<div class="container__form container--signin">
<form action="/doLogin" class="form" id="form2" method="post">
<h2 class="form__title">Sign In</h2>
<div style="width: 100%">
<input type="text" placeholder="username" class="input" name="username"/>
</div>
<div style="width: 100%">
<input type="password" placeholder="Password" class="input" name="password"/>
</div>
<div style="display: flex">
<div style="width: 70%">
<input type="text" placeholder="验证码" class="input" name="kaptchaVerifyCode"/>
</div>
<div style="width: 30%">
<img src="/verify_code"
style="margin: 10% 0"
width="80%"
height="70%"
id="kapche_img"
onclick="refreshCode()"
/>
</div>
</div>
<a href="#" class="link">Forgot your password?</a>
<button class="btn">Sign In</button>
</form>
</div>
<!-- Overlay -->
<div class="container__overlay">
<div class="overlay">
<div class="overlay__panel overlay--left">
<button class="btn" id="signIn">Sign In</button>
</div>
<div class="overlay__panel overlay--right">
<button class="btn" id="signUp">Sign Up</button>
</div>
</div>
</div>
</div>
<script>
const signInBtn = document.getElementById("signIn");
const signUpBtn = document.getElementById("signUp");
const fistForm = document.getElementById("form1");
const secondForm = document.getElementById("form2");
const container = document.querySelector(".container");
signInBtn.addEventListener("click", () => {
container.classList.remove("right-panel-active");
});
signUpBtn.addEventListener("click", () => {
container.classList.add("right-panel-active");
});
fistForm.addEventListener("submit", (e) => e.preventDefault());
secondForm.addEventListener("submit", (e) => e.preventDefault());
function refreshCode(e) {
document.getElementById("kapche_img").src = "/verify_code?date="+(new Date())
}
</script>
</body>
</html>
点击验证码图片可以刷新验证码。
三、JSON格式登录使用验证码
修改JsonServerAuthenticationConverter增加验证码判断：
@Slf4j
public class JsonServerAuthenticationConverter extends ServerFormLoginAuthenticationConverter {
private ObjectMapper objectMapper = new ObjectMapper();
private String usernameParameter = "username";
private String passwordParameter = "password";
private String kaptchaParamter = "kaptchaVerifyCode";
public JsonServerAuthenticationConverter() {
}
public JsonServerAuthenticationConverter(String usernameParameter,String passwordParameter, String kaptchaParamter) {
this.usernameParameter = usernameParameter;
this.passwordParameter = passwordParameter;
this.kaptchaParamter = kaptchaParamter;
}
public Mono<Authentication> apply(ServerWebExchange exchange) {
return exchange.getRequest().getBody().map(t -> {
String s = t.toString(StandardCharsets.UTF_8);
log.info("参数:{}",s);
Map<String , Object> map = null;
try {
map = objectMapper.readValue(s, Map.class);
} catch (JsonProcessingException e) {
log.info("解析JSON参数异常",e);
map = null;
}
return map;
}).zipWith(exchange.getSession().map(session -> {
return session.getAttribute(kaptchaParamter);
})).map(tuple -> {
Map<String, Object> map = tuple.getT1();
Object t2 = tuple.getT2();
if (map != null && !map.isEmpty()) {
log.info("前端传来的验证码：{}，session中的验证码:{}", map.get(kaptchaParamter), t2);
if (!Objects.equals(map.get(kaptchaParamter),t2)) {
throw new KaptchaAuthenticationException("验证码不正确");
} else {
String username = (String) map.get(usernameParameter);
String password = (String) map.get(passwordParameter);
Authentication unauthenticated = UsernamePasswordAuthenticationToken.unauthenticated(username, password);
return unauthenticated;
}
}
return null;
}).next();
}
}
修改配置MyReactiveSecurityConfig：
@Bean
public SecurityWebFilterChain springSecurityFilterChain(ServerHttpSecurity http) {
http
.authorizeExchange(exchanges -> exchanges
.pathMatchers(LOGIN_PAGE).permitAll()
.pathMatchers("/verify_code").permitAll()
.anyExchange().authenticated()
)
.httpBasic().disable()
.formLogin().disable()
.csrf().disable();
http.addFilterAt(authenticationManager(), SecurityWebFiltersOrder.FORM_LOGIN);
return http.build();
}
@Bean
public ReactiveAuthenticationManager userDetailsRepositoryReactiveAuthenticationManager() {
UserDetailsRepositoryReactiveAuthenticationManager manager = new UserDetailsRepositoryReactiveAuthenticationManager(this.reactiveUserDetailsService);
manager.setPasswordEncoder(passwordEncoder());
manager.setUserDetailsPasswordService(this.userDetailsPasswordService);
return manager;
}
@Bean
public AuthenticationWebFilter authenticationManager() {
AuthenticationWebFilter authenticationFilter = new AuthenticationWebFilter(userDetailsRepositoryReactiveAuthenticationManager());
authenticationFilter.setRequiresAuthenticationMatcher(ServerWebExchangeMatchers.pathMatchers(HttpMethod.POST, LOGIN_PAGE));
authenticationFilter.setAuthenticationFailureHandler((webFilterExchange, exception) -> {
log.info("认证异常",exception);
ServerWebExchange exchange = webFilterExchange.getExchange();
exchange.getResponse().getHeaders().add("Content-type", MediaType.APPLICATION_JSON_UTF8_VALUE);
Flux<DataBuffer> dataBufferFlux = DataBufferUtils.read(new ByteArrayResource("认证失败".getBytes(StandardCharsets.UTF_8)), exchange.getResponse().bufferFactory(), 1024 * 8);
return exchange.getResponse().writeAndFlushWith(t -> {
t.onSubscribe(new Subscription() {
@Override
public void request(long l) {
}
@Override
public void cancel() {
}
});
t.onNext(dataBufferFlux);
t.onComplete();
});
});
authenticationFilter.setAuthenticationConverter(new JsonServerAuthenticationConverter());
authenticationFilter.setAuthenticationSuccessHandler((webFilterExchange, authentication) -> {
log.info("认证成功:{}",authentication);
ServerWebExchange exchange = webFilterExchange.getExchange();
exchange.getResponse().getHeaders().add("Content-type", MediaType.APPLICATION_JSON_UTF8_VALUE);
Flux<DataBuffer> dataBufferFlux = DataBufferUtils.read(new ByteArrayResource("认证成功".getBytes(StandardCharsets.UTF_8)), exchange.getResponse().bufferFactory(), 1024 * 8);
return exchange.getResponse().writeAndFlushWith(t -> {
t.onSubscribe(new Subscription() {
@Override
public void request(long l) {
}
@Override
public void cancel() {
}
});
t.onNext(dataBufferFlux);
t.onComplete();
});
});
authenticationFilter.setSecurityContextRepository(new WebSessionServerSecurityContextRepository());
return authenticationFilter;
}
用Postman调用http://localhost:8080/verify_code获取验证码，在调用http://localhost:8080/doLogin进行登录。
参考：https://blog.csdn.net/weixin_44014864/article/details/128629697
参考：https://blog.csdn.net/m0_47119893/article/details/122397803
参考：https://blog.csdn.net/wstever/article/details/128698695