| /** |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package io.streamnative.pulsar.manager.zuul; |
| |
| import io.streamnative.pulsar.manager.service.EnvironmentCacheService; |
| import com.netflix.zuul.ZuulFilter; |
| import com.netflix.zuul.context.RequestContext; |
| import org.apache.commons.lang3.StringUtils; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.springframework.beans.factory.annotation.Autowired; |
| import org.springframework.beans.factory.annotation.Value; |
| import org.springframework.cloud.netflix.zuul.filters.support.FilterConstants; |
| import org.springframework.stereotype.Component; |
| |
| import javax.servlet.http.HttpServletRequest; |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| |
| import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.PRE_TYPE; |
| import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.REQUEST_URI_KEY; |
| |
| /** |
| * Handle http redirect and forward. |
| */ |
| @Component |
| public class EnvironmentForward extends ZuulFilter { |
| |
| private static final Logger log = LoggerFactory.getLogger(EnvironmentForward.class); |
| |
| @Autowired |
| private EnvironmentCacheService environmentCacheService; |
| @Value("${backend.jwt.token}") |
| private String pulsarJwtToken; |
| |
| @Override |
| public String filterType() { |
| return PRE_TYPE; |
| } |
| |
| @Override |
| public int filterOrder() { |
| return FilterConstants.SEND_FORWARD_FILTER_ORDER; |
| } |
| |
| @Override |
| public boolean shouldFilter() { |
| return true; |
| } |
| |
| @Override |
| public Object run() { |
| |
| RequestContext ctx = RequestContext.getCurrentContext(); |
| HttpServletRequest request = ctx.getRequest(); |
| String redirect = request.getParameter("redirect"); |
| |
| if (redirect != null && redirect.equals("true")) { |
| String redirectScheme = request.getParameter("redirect.scheme"); |
| String redirectHost = request.getParameter("redirect.host"); |
| String redirectPort = request.getParameter("redirect.port"); |
| String url = redirectScheme + "://" + redirectHost + ":" + redirectPort; |
| return forwardRequest(ctx, request, url); |
| } |
| |
| String broker = request.getHeader("x-pulsar-broker"); |
| if (StringUtils.isNotBlank(broker)) { // the request should be forward to a pulsar broker |
| // TODO: support https:// |
| String serviceUrl = "http://" + broker; |
| return forwardRequest(ctx, request, serviceUrl); |
| } |
| |
| String environment = request.getHeader("environment"); |
| if (StringUtils.isBlank(environment)) { |
| return null; |
| } |
| String serviceUrl = environmentCacheService.getServiceUrl(request); |
| return forwardRequest(ctx, request, serviceUrl); |
| } |
| |
| private Object forwardRequest(RequestContext ctx, HttpServletRequest request, String serviceUrl) { |
| ctx.put(REQUEST_URI_KEY, request.getRequestURI()); |
| try { |
| ctx.addZuulRequestHeader("Authorization", String.format("Bearer %s", pulsarJwtToken)); |
| ctx.setRouteHost(new URL(serviceUrl)); |
| log.info("Forward request to {} @ path {}", |
| serviceUrl, request.getRequestURI()); |
| } catch (MalformedURLException e) { |
| log.error("Route forward to {} path {} error: {}", |
| serviceUrl, request.getRequestURI(), e.getMessage()); |
| } |
| return null; |
| } |
| |
| } |