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Bael 5259 (#11832) 

* [BAEL-4849] Article code

* [BAEL-4968] Article code

* [BAEL-4968] Article code

* [BAEL-4968] Article code

* [BAEL-4968] Remove extra comments

* [BAEL-5259] simple test case

* [BAEL-5259] DSL-based rewrite

* [BAEL-5259] Code formatting

* [BAEL-5259] Test case naming
This commit is contained in:
psevestre 2022-02-21 13:12:24 -03:00 committed by GitHub
parent ab6c6034d4
commit 505a983ae5
7 changed files with 213 additions and 1 deletions
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16
spring-cloud/spring-cloud-gateway/pom.xml
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@ -177,5 +177,21 @@
</plugins>
</build>
</profile>
<profile>
<id>gateway-url-rewrite</id>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<mainClass>com.baeldung.springcloudgateway.rewrite.URLRewriteGatewayApplication</mainClass>
<jvmArguments>-Dspring.profiles.active=url-rewrite</jvmArguments>
</configuration>
</plugin>
</plugins>
</build>
</profile>
</profiles>
</project>

25
spring-cloud/spring-cloud-gateway/src/main/java/com/baeldung/springcloudgateway/rewrite/URLRewriteGatewayApplication.java Normal file
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@ -0,0 +1,25 @@
/**
*
*/
package com.baeldung.springcloudgateway.rewrite;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.cloud.gateway.filter.GatewayFilter;
import reactor.core.publisher.Mono;
/**
* @author Baeldung
*
*/
@SpringBootApplication
public class URLRewriteGatewayApplication {
public static void main(String[] args) {
new SpringApplicationBuilder(URLRewriteGatewayApplication.class)
.profiles("url-rewrite")
.run(args);
}
}

43
spring-cloud/spring-cloud-gateway/src/main/java/com/baeldung/springcloudgateway/rewrite/routes/DynamicRewriteRoute.java Normal file
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@ -0,0 +1,43 @@
package com.baeldung.springcloudgateway.rewrite.routes;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.gateway.route.RouteLocator;
import org.springframework.cloud.gateway.route.builder.RouteLocatorBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Profile;
import org.springframework.http.server.reactive.ServerHttpRequest;
import static org.springframework.cloud.gateway.support.ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR;
import static org.springframework.cloud.gateway.support.ServerWebExchangeUtils.addOriginalRequestUrl;
import java.util.Random;
@Configuration
@Profile("url-rewrite")
public class DynamicRewriteRoute {
@Value("${rewrite.backend.uri}")
private String backendUri;
private static Random rnd = new Random();
@Bean
public RouteLocator dynamicZipCodeRoute(RouteLocatorBuilder builder) {
return builder.routes()
.route("dynamicRewrite", r ->
r.path("/v2/zip/**")
.filters(f -> f.filter((exchange, chain) -> {
ServerHttpRequest req = exchange.getRequest();
addOriginalRequestUrl(exchange, req.getURI());
String path = req.getURI().getRawPath();
String newPath = path.replaceAll(
"/v2/zip/(?<zipcode>.*)",
"/api/zip/${zipcode}-" + String.format("%03d", rnd.nextInt(1000)));
ServerHttpRequest request = req.mutate().path(newPath).build();
exchange.getAttributes().put(GATEWAY_REQUEST_URL_ATTR, request.getURI());
return chain.filter(exchange.mutate().request(request).build());
}))
.uri(backendUri))
.build();
}
}

2
spring-cloud/spring-cloud-gateway/src/main/java/com/baeldung/springcloudgateway/webfilters/WebFilterGatewayApplication.java
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@ -8,7 +8,7 @@ public class WebFilterGatewayApplication {
public static void main(String[] args) {
new SpringApplicationBuilder(WebFilterGatewayApplication.class)
.profiles("webfilters")
.profiles("url-rewrite")
.run(args);
}

8
spring-cloud/spring-cloud-gateway/src/main/resources/application-nosecurity.yml Normal file
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@ -0,0 +1,8 @@
# Enable this profile to disable security
spring:
autoconfigure:
exclude:
- org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration
- org.springframework.boot.actuate.autoconfigure.ManagementSecurityAutoConfiguration
- org.springframework.boot.autoconfigure.security.reactive.ReactiveSecurityAutoConfiguration
- org.springframework.boot.actuate.autoconfigure.security.reactive.ReactiveManagementWebSecurityAutoConfiguration

11
spring-cloud/spring-cloud-gateway/src/main/resources/application-url-rewrite.yml Normal file
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@ -0,0 +1,11 @@
spring:
cloud:
gateway:
routes:
- id: rewrite_v1
uri: ${rewrite.backend.uri:http://example.com}
predicates:
- Path=/v1/customer/**
filters:
- RewritePath=/v1/customer/(?<segment>.*),/api/$\{segment}

109
spring-cloud/spring-cloud-gateway/src/test/java/com/baeldung/springcloudgateway/rewrite/URLRewriteGatewayApplicationLiveTest.java Normal file
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@ -0,0 +1,109 @@
package com.baeldung.springcloudgateway.rewrite;
import static org.junit.Assert.assertTrue;
import static org.junit.jupiter.api.Assertions.assertEquals;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import org.junit.AfterClass;
import org.junit.jupiter.api.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
import org.springframework.boot.web.server.LocalServerPort;
import org.springframework.test.context.ActiveProfiles;
import org.springframework.test.context.DynamicPropertyRegistry;
import org.springframework.test.context.DynamicPropertySource;
import org.springframework.test.web.reactive.server.WebTestClient;
import com.sun.net.httpserver.HttpServer;
@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
@ActiveProfiles({ "nosecurity", "url-rewrite" })
class URLRewriteGatewayApplicationLiveTest {
// NOTE for Eclipse users: By default, Eclipse will complain about com.sun.** classes.
// To solve this issue, follow instructions available at the :
// https://stackoverflow.com/questions/13155734/eclipse-cant-recognize-com-sun-net-httpserver-httpserver-package
private static HttpServer mockServer;
private static Logger log = LoggerFactory.getLogger(URLRewriteGatewayApplicationLiveTest.class);
// Create a running HttpServer that echoes back the request URL.
private static HttpServer startTestServer() {
try {
log.info("[I26] Starting mock server");
mockServer = HttpServer.create();
mockServer.bind(new InetSocketAddress(0), 0);
mockServer.createContext("/api", (xchg) -> {
String uri = xchg.getRequestURI()
.toString();
log.info("[I23] Backend called: uri={}", uri);
xchg.getResponseHeaders()
.add("Content-Type", "text/plain");
xchg.sendResponseHeaders(200, 0);
OutputStream os = xchg.getResponseBody();
os.write(uri.getBytes());
os.flush();
os.close();
});
mockServer.start();
InetSocketAddress localAddr = mockServer.getAddress();
log.info("[I36] mock server started: local address={}", localAddr);
return mockServer;
} catch (Exception ex) {
throw new RuntimeException(ex);
}
}
// TIP: https://www.baeldung.com/spring-dynamicpropertysource
@DynamicPropertySource
static void registerBackendServer(DynamicPropertyRegistry registry) {
registry.add("rewrite.backend.uri", () -> {
HttpServer s = startTestServer();
return "http://localhost:" + s.getAddress().getPort();
});
}
@AfterClass
public static void stopMockBackend() throws Exception {
log.info("[I40] Shutdown mock http server");
mockServer.stop(5);
}
@LocalServerPort
private int localPort;
@Test
void testWhenApiCall_thenRewriteSuccess(@Autowired WebTestClient webClient) {
webClient.get()
.uri("http://localhost:" + localPort + "/v1/customer/customer1")
.exchange()
.expectBody()
.consumeWith((result) -> {
String body = new String(result.getResponseBody());
log.info("[I99] body={}", body);
assertEquals("/api/customer1", body);
});
}
@Test
void testWhenDslCall_thenRewriteSuccess(@Autowired WebTestClient webClient) {
webClient.get()
.uri("http://localhost:" + localPort + "/v2/zip/123456")
.exchange()
.expectBody()
.consumeWith((result) -> {
String body = new String(result.getResponseBody());
log.info("[I99] body={}", body);
assertTrue(body.matches("/api/zip/123456-\\d{3}"));
});
}
}