设置响应头 SetResponseHeaderGatewayFilterFactory

如果通过网关代理的请求，需要设置特定的响应头，可以使用 SetResponseHeaderGatewayFilterFactory 过滤器
添加的响应头会覆盖已有的响应头（不合并已有的响应头）
- 如需合并，请使用添加响应头
请使用大写驼峰命名法定义响应头的名称（否则可能会出现重复的响应头）

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.SetResponseHeaderGatewayFilterFactory;
import org.springframework.http.HttpHeaders;
import org.springframework.http.ResponseEntity;
import org.springframework.test.context.TestPropertySource;
import org.springframework.web.client.RestTemplate;

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

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

/**
 * @author xuxiaowei
 * @since 0.0.1
 * @see SetResponseHeaderGatewayFilterFactory
 */
@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=SetResponseHeader",
        "spring.cloud.gateway.routes[0].filters[0].args.name=" + NAME,
        "spring.cloud.gateway.routes[0].filters[0].args.value=" + VALUE,

        "spring.cloud.gateway.routes[1].id=ua",
        "spring.cloud.gateway.routes[1].uri=http://localhost:45678",
        "spring.cloud.gateway.routes[1].predicates[0]=Host=ua.localdev.me:*",
})
// @formatter:on
class SetResponseHeaderGatewayFilterFactoryTests {

    static final String NAME = "Content-Type";

    static final String VALUE = "application/json;charset=utf-8";

    @LocalServerPort
    private int serverPort;

    @SneakyThrows
    @Test
    void apply() {

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

        RestTemplate restTemplate = new RestTemplate();

        ResponseEntity<Map> entity = restTemplate.getForEntity(url, Map.class);

        assertNotNull(entity);

        HttpHeaders headers = entity.getHeaders();

        assertNotNull(headers);

        Object valueObj = headers.get(NAME);

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

        List<String> list = (List<String>) valueObj;
        assertEquals(1, list.size());
        assertTrue(list.contains(VALUE));
    }

    @Test
    void ua() {

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

        RestTemplate restTemplate = new RestTemplate();

        ResponseEntity<Map> entity = restTemplate.getForEntity(url, Map.class);

        assertNotNull(entity);

        HttpHeaders headers = entity.getHeaders();

        assertNotNull(headers);

        Object valueObj = headers.get(NAME);

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

        List<String> list = (List<String>) valueObj;
        assertEquals(1, list.size());
        assertFalse(list.contains(VALUE));
    }

}

设置响应头 SetResponseHeaderGatewayFilterFactory ​

设置响应头 SetResponseHeaderGatewayFilterFactory