/*
 *      Copyright (c) 2018-2028, Chill Zhuang All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are met:
 *
 *  Redistributions of source code must retain the above copyright notice,
 *  this list of conditions and the following disclaimer.
 *  Redistributions in binary form must reproduce the above copyright
 *  notice, this list of conditions and the following disclaimer in the
 *  documentation and/or other materials provided with the distribution.
 *  Neither the name of the dreamlu.net developer nor the names of its
 *  contributors may be used to endorse or promote products derived from
 *  this software without specific prior written permission.
 *  Author: Chill 庄骞 (smallchill@163.com)
 */
package com.vci.ubcs.gateway.provider;

import org.springframework.cloud.gateway.support.ServerWebExchangeUtils;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.util.MultiValueMap;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.util.UriComponentsBuilder;

import java.net.URI;
import java.util.LinkedHashSet;

/**
 * RequestProvider
 *
 * @author Chill
 */
public class RequestProvider {

	/**
	 * 获取原始url
	 *
	 * @param exchange
	 * @return
	 */
	public static String getOriginalRequestUrl(ServerWebExchange exchange) {
		ServerHttpRequest request = exchange.getRequest();
		LinkedHashSet<URI> uris = exchange.getRequiredAttribute(ServerWebExchangeUtils.GATEWAY_ORIGINAL_REQUEST_URL_ATTR);
		URI requestUri = uris.stream().findFirst().orElse(request.getURI());
		MultiValueMap<String, String> queryParams = request.getQueryParams();
		return UriComponentsBuilder.fromPath(requestUri.getRawPath()).queryParams(queryParams).build().toUriString();
	}

}