package com.zhangmeng.file.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.http.HttpMethod;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.oauth2.config.annotation.web.configuration.EnableResourceServer;
import org.springframework.security.oauth2.config.annotation.web.configuration.ResourceServerConfigurerAdapter;
import org.springframework.security.oauth2.provider.token.TokenStore;
import org.springframework.security.oauth2.provider.token.store.JwtAccessTokenConverter;
import org.springframework.security.oauth2.provider.token.store.JwtTokenStore;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.stream.Collectors;

/**
 * @author 转身的背影在心底里沉沦
 * @date 2021年9月14日16:45:29
 * @version 1.0
 */
@Configuration
@EnableResourceServer
@EnableGlobalMethodSecurity(prePostEnabled = true, securedEnabled = true)// 激活方法上的PreAuthorize注解
public class ResourceServerConfig extends ResourceServerConfigurerAdapter {

    // 公钥
    private static final String PUBLIC_KEY = "public.key";

    @Autowired
    private SecurityProperty securityProperty;

    /***
     * 定义JwtTokenStore
     * @param jwtAccessTokenConverter
     * @return
     */
    @Bean
    public TokenStore tokenStore(JwtAccessTokenConverter jwtAccessTokenConverter) {
        return new JwtTokenStore(jwtAccessTokenConverter);
    }

    /***
     * 定义JJwtAccessTokenConverter
     * @return
     */
    @Bean
    public JwtAccessTokenConverter jwtAccessTokenConverter() {
        JwtAccessTokenConverter converter = new JwtAccessTokenConverter();
        converter.setVerifierKey(getPubKey()); //秘钥的一部分
        return converter;
    }
    /**
     * 获取非对称加密公钥 Key
     * @return 公钥 Key
     */
    private String getPubKey() {
        Resource resource = new ClassPathResource(PUBLIC_KEY);
        try {
            InputStreamReader inputStreamReader = new InputStreamReader(resource.getInputStream());
            BufferedReader br = new BufferedReader(inputStreamReader);
            return br.lines().collect(Collectors.joining("\n"));
        } catch (IOException ioe) {
            return null;
        }
    }

    /***
     * SpringSecurity
     * Http安全配置，对每个到达系统的http请求链接进行校验
     * @param http
     * @throws Exception
     */
    @Override
    public void configure(HttpSecurity http) throws Exception {

        /**
         * - /swagger-ui.html
         *       - /swagger-ui/**
         *       - /swagger-resources/**
         *       - /v2/api-docs
         *       - /v3/api-docs
         *       - /doc.html
         *       - /webjars/springfox-swagger-ui/**
         */

        // 所有请求必须认证通过
        http.authorizeRequests()
                // 跨域预检请求
                .antMatchers(HttpMethod.OPTIONS, "/**").permitAll()
                .antMatchers(securityProperty.getOpenApi()).permitAll()
                .anyRequest().
                authenticated();    // 其他地址需要认证授权
    }
}
