拦截器方式解决跨域问题

超、凢脫俗 2023-01-15 03:38 98阅读 0赞

后台代码：

/**
     * 跨域请求拦截器
     */
    @Log4j2
    @Configuration
    public class CrossInterceptor implements HandlerInterceptor {
    
        @Override
        public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {
            String origin  = request.getHeader(HttpHeaders.ORIGIN);
            if (origin != null) {
                 response.setHeader("Access-Control-Allow-Origin", "*");
                 // response.setHeader("Access-Control-Allow-Credentials", "true");
                 response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE, PUT, HEAD");
                 response.setHeader("Access-Control-Allow-Headers", "Content-Type, Token");
                 response.setHeader("Access-Control-Max-Age", "3600");
            }
            return true;
        }
    }

OPTIONS请求（预检请求）直接返回false，以便真正的请求能够访问

/**
     * 跨域请求，时不时的发送一次options请求，单独响应
     */
    public class OptionsInterceptor implements HandlerInterceptor {
        @Override
        public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
            if(request.getMethod().equals("OPTIONS")){
                response.setStatus(HttpServletResponse.SC_OK);
                return false;
            }
            return true;
        }
    }

注册拦截器

@Log4j2
    @Configuration
    public class AdminConfig implements WebMvcConfigurer {
        @Override
        public void addInterceptors(InterceptorRegistry registry) {
            //注册TestInterceptor拦截器
            registry.addInterceptor(new CrossInterceptor()).addPathPatterns("/**");
            log.debug("CrossInterceptor拦截器注册成功！");
    
            registry.addInterceptor(new OptionsInterceptor()).addPathPatterns("/**");
            log.debug("Options请求拦截器注册成功！");
    
        }
    }

至此，跨域问题解决！