springboot使用filter获取自定义请求头的实现代码

String token = request.getHeader("token"); // null
String id = request.getHeader("id"); // null
String role = request.getHeader("role"); // null

@Configuration
public class CorsConfig {
  private CorsConfiguration buildConfig() {
    CorsConfiguration corsConfiguration = new CorsConfiguration();
    corsConfiguration.addAllowedOrigin("*"); // 1
    corsConfiguration.addAllowedHeader("*"); // 2
    corsConfiguration.addAllowedMethod("*"); // 3
    return corsConfiguration;
  }

  @Bean
  public CorsFilter corsFilter() {
    UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
    source.registerCorsConfiguration("/**", buildConfig()); // 4
    return new CorsFilter(source);
  }
}

HttpServletRequest request= (HttpServletRequest)servletRequest;
    HttpServletResponse res = (HttpServletResponse) servletResponse;
    String method=request.getMethod();
    if(HttpMethod.OPTIONS.toString().equals(method)){
      res.setStatus(HttpStatus.NO_CONTENT.value());
    }else {
      String token = request.getHeader("token");
      String id = request.getHeader("id");
      String role = request.getHeader("role");
      ~~~~~~~

if ($request_method = 'OPTIONS') {
 return 204;
}
add_header Access-Control-Allow-Origin * always;
add_header Access-Control-Allow-Headers "Content-Type, Authorization" always;
add_header Access-Control-Allow-Methods "GET, POST, OPTIONS, PUT, PATCH, DELETE, HEAD" always;
add_header Access-Control-Max-Age 86400 always;

@Configuration
public class CorsConfig {
  @Bean
  public CorsWebFilter corsFilter() {
    CorsConfiguration config = new CorsConfiguration();
    config.addAllowedMethod("*");
    config.addAllowedOrigin("*");
    config.addAllowedHeader("*");

    UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource(new PathPatternParser());
    source.registerCorsConfiguration("/**", config);

    return new CorsWebFilter(source);
  }
}