package com.zy.acs.hex.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.AsyncHandlerInterceptor;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * WebMvc配置, 拦截器、资源映射等都在此配置
 *
 * @author vincent
 * @since 2019-06-12 10:11:16
 */
@Configuration
public class WebMvcConfig implements WebMvcConfigurer {

    /**
     * token通过header传递的名称
     */
    public static final String TOKEN_HEADER_NAME = "Authorization";


    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(getAsyncHandlerInterceptor())
                .addPathPatterns("/**")
        ;
    }


    @Bean
    public AsyncHandlerInterceptor getAsyncHandlerInterceptor() {
        return new AsyncHandlerInterceptor() {
            @Override
            public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
                cors(response);
                return true;
            }
        };
    }


    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        // 配置静态资源处理器
        registry.addResourceHandler("/static/**")
                .addResourceLocations("classpath:/static/")
                .addResourceLocations("/static/");
        // 配置视图文件处理器
        registry.addResourceHandler("/views/**")
                .addResourceLocations("/views/");
    }

    public static void cors(HttpServletResponse response) {
        // 跨域设置
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Methods", "*");
        response.setHeader("Access-Control-Allow-Headers", "*");
        response.setHeader("Access-Control-Expose-Headers", TOKEN_HEADER_NAME);
    }

}