org.springframework.cloud.gateway.filter.RouteToRequestUrlFilter.java Source code

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Here is the source code for org.springframework.cloud.gateway.filter.RouteToRequestUrlFilter.java

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/*
 * Copyright 2013-2017 the original author or authors.
 *
 * 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 org.springframework.cloud.gateway.filter;

import java.net.URI;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.cloud.gateway.model.Route;
import org.springframework.core.Ordered;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.WebFilterChain;
import org.springframework.web.util.UriComponentsBuilder;

import static org.springframework.cloud.gateway.support.ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR;
import static org.springframework.cloud.gateway.support.ServerWebExchangeUtils.GATEWAY_ROUTE_ATTR;
import static org.springframework.cloud.gateway.support.ServerWebExchangeUtils.getAttribute;

import reactor.core.publisher.Mono;

/**
 * @author Spencer Gibb
 */
public class RouteToRequestUrlFilter implements GlobalFilter, Ordered {

    private static final Log log = LogFactory.getLog(RouteToRequestUrlFilter.class);
    public static final int ROUTE_TO_URL_FILTER_ORDER = 10000;

    @Override
    public int getOrder() {
        return ROUTE_TO_URL_FILTER_ORDER;
    }

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, WebFilterChain chain) {
        Route route = getAttribute(exchange, GATEWAY_ROUTE_ATTR, Route.class);
        if (route == null) {
            return chain.filter(exchange);
        }
        log.info("RouteToRequestUrlFilter start");
        URI requestUrl = UriComponentsBuilder.fromHttpRequest(exchange.getRequest()).uri(route.getUri()).build(true)
                .toUri();
        exchange.getAttributes().put(GATEWAY_REQUEST_URL_ATTR, requestUrl);
        return chain.filter(exchange);
    }

}