复制请求头 MapRequestHeaderGatewayFilterFactory

将一个请求头复制给另一个请求头，可以使用 MapRequestHeaderGatewayFilterFactory 过滤器
请使用大写驼峰命名法定义请求头的名称（否则可能会出现重复的请求头）
java
package cn.com.xuxiaowei.shield.gateway.filter.factory;

import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.boot.test.web.server.LocalServerPort;
import org.springframework.cloud.gateway.filter.factory.MapRequestHeaderGatewayFilterFactory;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.test.context.TestPropertySource;
import org.springframework.web.client.RestTemplate;

import java.util.List;
import java.util.Map;
import java.util.UUID;

import static cn.com.xuxiaowei.shield.gateway.filter.factory.MapRequestHeaderGatewayFilterFactoryTests.NAME;
import static cn.com.xuxiaowei.shield.gateway.filter.factory.MapRequestHeaderGatewayFilterFactoryTests.TO_NAME;
import static org.junit.jupiter.api.Assertions.*;

/**
 * @author xuxiaowei
 * @since 0.0.1
 * @see MapRequestHeaderGatewayFilterFactory
 */
@Slf4j
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
// @formatter:off
@TestPropertySource(properties = {
        "spring.cloud.gateway.routes[0].id=demo",
        "spring.cloud.gateway.routes[0].uri=http://localhost:45678",
        "spring.cloud.gateway.routes[0].predicates[0]=Host=demo.localdev.me:*",
        "spring.cloud.gateway.routes[0].filters[0].name=MapRequestHeader",
        "spring.cloud.gateway.routes[0].filters[0].args.fromHeader=" + NAME,
        "spring.cloud.gateway.routes[0].filters[0].args.toHeader=" + TO_NAME,
})
// @formatter:on
class MapRequestHeaderGatewayFilterFactoryTests {

    static final String NAME = "abc-xuxiaowei";

    static final String TO_NAME = "abc-zhangsan";

    @LocalServerPort
    private int serverPort;

    @SneakyThrows
    @Test
    void apply() {

        String url = String.format("http://demo.localdev.me:%s/header", serverPort);

        RestTemplate restTemplate = new RestTemplate();

        String value = UUID.randomUUID().toString();

        HttpHeaders headers = new HttpHeaders();
        headers.set(NAME, value);
        HttpEntity<HttpHeaders> httpEntity = new HttpEntity<>(headers);
        Map map = restTemplate.postForObject(url, httpEntity, Map.class);

        assertNotNull(map);

        Object valueObj = map.get(NAME);

        assertNotNull(valueObj);
        assertInstanceOf(List.class, valueObj);

        List<String> list = (List<String>) valueObj;
        assertEquals(1, list.size());
        assertEquals(value, list.get(0));

        Object toValueObj = map.get(TO_NAME);

        assertNotNull(toValueObj);
        assertEquals(valueObj, toValueObj);
    }

    @Test
    void ua() {

        String url = String.format("http://demo.localdev.me:%s/header", serverPort);

        RestTemplate restTemplate = new RestTemplate();

        String value = UUID.randomUUID().toString();
        String toValue = UUID.randomUUID().toString();

        HttpHeaders headers = new HttpHeaders();
        headers.set(NAME, value);
        headers.set(TO_NAME, toValue);
        HttpEntity<HttpHeaders> httpEntity = new HttpEntity<>(headers);
        Map map = restTemplate.postForObject(url, httpEntity, Map.class);

        assertNotNull(map);

        Object valueObj = map.get(NAME);

        assertNotNull(valueObj);
        assertInstanceOf(List.class, valueObj);

        List<String> list = (List<String>) valueObj;
        assertEquals(1, list.size());
        assertEquals(value, list.get(0));

        Object toValueObj = map.get(TO_NAME);

        assertNotNull(toValueObj);
        assertInstanceOf(List.class, toValueObj);

        List<String> toList = (List<String>) toValueObj;
        assertEquals(2, toList.size());
        assertTrue(toList.contains(toValue));

        assertTrue(toList.contains(value));
    }

}
复制请求头 MapRequestHeaderGatewayFilterFactory ​

复制请求头 MapRequestHeaderGatewayFilterFactory
