SpringCloud-Zuul搭建
一、创建工程，在pom中引入Zuul
二、重写路由加载类，实在路由的动态注册和路由转发
package com.genius.gateway.zuul; import com.genius.gateway.helper.DbHelper; import com.genius.gateway.model.ZuulRouteKV; import org.springframework.cloud.netflix.zuul.filters.RefreshableRouteLocator; import org.springframework.cloud.netflix.zuul.filters.Route; import org.springframework.cloud.netflix.zuul.filters.SimpleRouteLocator; import org.springframework.cloud.netflix.zuul.filters.ZuulProperties; import java.util.LinkedHashMap; import java.util.List; import java.util.Map; import java.util.Random; import org.slf4j.Logger ; import org.slf4j.LoggerFactory ; import org.springframework.jdbc.core.BeanPropertyRowMapper; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.util.StringUtils; public class CustomRouteLocator extends SimpleRouteLocator implements RefreshableRouteLocator { public final static Logger logger=LoggerFactory.getLogger(CustomRouteLocator.class); private JdbcTemplate jdbcTemplate; private DbHelper dbHelper; public void setDbHelper(DbHelper dbHelper){ this.dbHelper=dbHelper; } private ZuulProperties properties; //设置数据库连接 public void setJdbcTemplate(JdbcTemplate jdbcTemplate){ this.jdbcTemplate=jdbcTemplate; } public CustomRouteLocator(String servletPah,ZuulProperties properties){ super(servletPah,properties); this.properties=properties; logger.info("servletPath:{}",servletPah); } @Override public void refresh() { doRefresh(); } /** *加载路由规则 */ @Override protected Map<String,ZuulProperties.ZuulRoute> locateRoutes(){ LinkedHashMap<String,ZuulProperties.ZuulRoute> routesMap=new LinkedHashMap<String,ZuulProperties.ZuulRoute>(); //从application.properties中加载路由信息 routesMap.putAll(super.locateRoutes()); //从db中加载路由信息 routesMap.putAll(locateRoutesFromDB()); //优化一下配置 LinkedHashMap<String, ZuulProperties.ZuulRoute> values = new LinkedHashMap<>(); for (Map.Entry<String, ZuulProperties.ZuulRoute> entry : routesMap.entrySet()) { String path = entry.getKey(); // 如果还没有出现，就用斜杠准备。 if (!path.startsWith("/")) { path = "/" + path; } if (StringUtils.hasText(this.properties.getPrefix())) { path = this.properties.getPrefix() + path; if (!path.startsWith("/")) { path = "/" + path; } } values.put(path, entry.getValue()); } return values; } /* * 加载路由数据 * */ private Map<String,ZuulProperties.ZuulRoute> locateRoutesFromDB(){ Map<String,ZuulProperties.ZuulRoute> routes=new LinkedHashMap<>(); System.out.println("=============load zuul route info from db =============="); //从数据库中加载数据 String sql="select t.*, t.rowid from PIPECLOUD.ZUULROUTE t where t.enabled=1"; sql="select * from zuulroute where enabled=true"; List<ZuulRouteKV> result=jdbcTemplate.query(sql,new BeanPropertyRowMapper<>(ZuulRouteKV.class)); //List<ZuulRouteKV> result= dbHelper.GetRoutesData(); //遍历数据 for(ZuulRouteKV item:result){ if(org.apache.commons.lang3.StringUtils.isBlank(item.getPath()) || org.apache.commons.lang3.StringUtils.isBlank(item.getUrl()) ){ continue; } ZuulProperties.ZuulRoute zuulRoute = new ZuulProperties.ZuulRoute(); try { //org.springframework.beans.BeanUtils.copyProperties(result,zuulRoute); zuulRoute.setId(item.getId()); zuulRoute.setPath(item.getPath()); zuulRoute.setServiceId(item.getServiceId()); zuulRoute.setStripPrefix(item.isStripPrefix()); zuulRoute.setUrl(item.getUrl()); } catch (Exception e) { logger.error("=============load zuul route info from db with error==============",e); } routes.put(zuulRoute.getPath(),zuulRoute); } return routes; } /** * 获取路由 */ @Override protected Route getRoute(ZuulProperties.ZuulRoute route, String path) { if (route == null) { return null; } else { String targetPath = path; String prefix = this.properties.getPrefix(); if (prefix.endsWith("/")) { prefix = prefix.substring(0, prefix.length() - 1); } if (path.startsWith(prefix + "/") && this.properties.isStripPrefix()) { targetPath = path.substring(prefix.length()); } if (route.isStripPrefix()) { //源码 // int index = route.getPath().indexOf("*") - 1; // if (index > 0) { // String routePrefix = route.getPath().substring(0, index); // targetPath = targetPath.replaceFirst(routePrefix, ""); // prefix = prefix + routePrefix; // } //重构方法 int spliccount=route.getPath().split("/").length-1; if(spliccount>0){ String[] paths=targetPath.split("/"); String indexStr=paths[spliccount]+"/"; int index1=targetPath.indexOf(indexStr)-1; if(index1>0){ prefix=targetPath.substring(0,index1); targetPath=targetPath.substring(index1); } } } Boolean retryable = this.properties.getRetryable(); if (route.getRetryable() != null) { retryable = route.getRetryable(); } //负载均衡 String hostStr=route.getUrl(); String Location=hostStr; String[] hosts=hostStr.split(";"); if(hosts.length>1){ Random random=new Random(); int index=random.nextInt(hosts.length); Location=hosts[index]; } return new Route(route.getId(), targetPath, Location, prefix, retryable, route.isCustomSensitiveHeaders() ? route.getSensitiveHeaders() : null, route.isStripPrefix()); } } }
@Configuration public class CustomZuulConfig { @Autowired ZuulProperties zuulProperties; @Autowired ServerProperties server; @Autowired JdbcTemplate jdbcTemplate; //@Autowired //DbHelper dbHelper; @Bean public CustomRouteLocator routeLocator(){ String path=this.server.getServlet().getServletPrefix(); CustomRouteLocator reouteLocator=new CustomRouteLocator(path, this.zuulProperties); reouteLocator.setJdbcTemplate(jdbcTemplate); //reouteLocator.setDbHelper(dbHelper); return reouteLocator; } }
@Service public class RefreshRouteService { @Autowired ApplicationEventPublisher publisher; @Autowired RouteLocator routeLocator; //刷新路由配置信息 public void refreshRoute() { RoutesRefreshedEvent routesRefreshedEvent = new RoutesRefreshedEvent(routeLocator); publisher.publishEvent(routesRefreshedEvent); } }
@RestController @RequestMapping("/admin") public class AdminController { @RequestMapping("/index") public String index(){ return "index"; } @Autowired RefreshRouteService server; @RequestMapping("/refreshRoute") public String refreshRoute(){ server.refreshRoute(); return "路由重置成功！"; } }
三、跨域请求过滤器
/** * 实现跨域请求 * #防止header重复写入 * zuul.sensitive-headers=Access-Control-Allow-Origin,Access-Control-Allow-Method */ @Configuration public class GateWayCorsConfig { @Bean public FilterRegistrationBean corsFilter() { final UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource(); final CorsConfiguration config = new CorsConfiguration(); config.setAllowCredentials(true); config.addAllowedOrigin("*"); config.addAllowedHeader("*"); config.addAllowedMethod("*"); //这个请求头在https中会出现,但是有点问题，下面我会说 //config.addExposedHeader("X-forwared-port, X-forwarded-host"); source.registerCorsConfiguration("/**", config); FilterRegistrationBean bean = new FilterRegistrationBean(new CorsFilter(source)); bean.setOrder(Ordered.HIGHEST_PRECEDENCE); return bean; } }
https://blog.csdn.net/tianyaleixiaowu/article/details/77933295?locationNum=5&fps=1
https://www.cnblogs.com/sam-uncle/p/9011400.html
