一、Springboot 实现 token 校验
SpringBoot 实现 token 校验，可以通过 Filter 或者 HandlerInterceptor，两种方式都可以，Filter 在最外层，请求首先会通过 Filter，filter 允许请求才会通过 Intercept。
下面以 HandlerInterceptor 实现为例
1. 实现 HandlerInterceptor，拦截请求校验 token
public class AuthenticationInterceptor implements HandlerInterceptor {
private static final String URI_PASS_TOKEN = “/user/login”;
@Override
public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object object) throws Exception {
log.info(“authentication interceptor preHandle path:{} uri:{}”,httpServletRequest.getServletPath(),httpServletRequest.getRequestURI());
// if (“OPTIONS”.equalsIgnoreCase(httpServletRequest.getMethod())) {
// return true;
// }
if (httpServletRequest.getRequestURI().endsWith(URI_PASS_TOKEN)) {
return true;
}
// 从 http header 里面获取 token
String token = httpServletRequest.getHeader(“token”);
if (StringUtils.isEmpty(token)) {
throw new AuthenticationException(CODE_AUTHENTICATION_FAILED,”token is empty”);
}
Algorithm algorithm = Algorithm.HMAC256(JwtConstant.TOKEN_CREATE_SECRET);
JWTVerifier verifier = JWT.require(algorithm).build();
try {
verifier.verify(token);
}catch (Exception ex){
throw new AuthenticationException(CODE_AUTHENTICATION_FAILED,ex.getMessage());
}
return true;
}
@Override
public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
}
@Override
public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
}
}
2.Configuration 配置，实现自动注入
@Configuration
public class InterceptorConfig extends WebMvcConfigurerAdapter {
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(authenticationInterceptor())
.addPathPatterns(“/**”);
}
@Bean
public AuthenticationInterceptor authenticationInterceptor() {
return new AuthenticationInterceptor();
}
}
二、前端调用 跨域 Preflight response is not successful
通过单元测试、PostMan 测试都可以调同，但是 vue 前端怎么都无法调用，错误如下：
参考 https://segmentfault.com/a/11… 发现是浏览器发出的 OPTIONS 预检请求被 HandlerInterceptor 拦截了，因此在 HandlerInterceptor 添加如下代码：
if (“OPTIONS”.equalsIgnoreCase(httpServletRequest.getMethod())) {
return true;
}
对于 options 的请求不进行 token 检测即可