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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.controller.proxy;
import ai.vespa.http.HttpURL.Path;
import ai.vespa.util.http.hc4.SslConnectionSocketFactory;
import com.github.tomakehurst.wiremock.junit5.WireMockExtension;
import com.github.tomakehurst.wiremock.stubbing.Scenario;
import com.yahoo.container.jdisc.HttpRequest;
import com.yahoo.container.jdisc.HttpResponse;
import com.yahoo.yolean.concurrent.Sleeper;
import org.apache.http.protocol.HttpContext;
import org.apache.http.protocol.HttpCoreContext;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.RegisterExtension;
import java.io.ByteArrayOutputStream;
import java.net.URI;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
import static com.github.tomakehurst.wiremock.client.WireMock.get;
import static com.github.tomakehurst.wiremock.client.WireMock.getRequestedFor;
import static com.github.tomakehurst.wiremock.client.WireMock.urlEqualTo;
import static com.github.tomakehurst.wiremock.core.WireMockConfiguration.options;
import static org.junit.jupiter.api.Assertions.assertEquals;
/**
* @author mpolden
*/
public class ConfigServerRestExecutorImplTest {
@RegisterExtension
public final WireMockExtension wireMock = WireMockExtension.newInstance().options(options().dynamicPort()).failOnUnmatchedRequests(true).build();
@Test
void proxy_with_retries() throws Exception {
var connectionReuseStrategy = new CountingConnectionReuseStrategy(Set.of("127.0.0.1"));
var proxy = new ConfigServerRestExecutorImpl(SslConnectionSocketFactory.of(), Sleeper.NOOP, connectionReuseStrategy);
URI url = url();
String path = url.getPath();
stubRequests(path);
HttpRequest request = HttpRequest.createTestRequest(url.toString(), com.yahoo.jdisc.http.HttpRequest.Method.GET);
ProxyRequest proxyRequest = ProxyRequest.tryOne(url, Path.parse(path), request);
// Request is retried
HttpResponse response = proxy.handle(proxyRequest);
wireMock.verify(3, getRequestedFor(urlEqualTo(path)));
assertEquals(200, response.getStatus());
ByteArrayOutputStream out = new ByteArrayOutputStream();
response.render(out);
assertEquals("OK", out.toString());
// No connections are reused as host is a VIP
assertEquals(0, connectionReuseStrategy.reusedConnections.get(url.getHost()).intValue());
}
@Test
void proxy_without_connection_reuse() throws Exception {
var connectionReuseStrategy = new CountingConnectionReuseStrategy(Set.of());
var proxy = new ConfigServerRestExecutorImpl(SslConnectionSocketFactory.of(), Sleeper.NOOP, connectionReuseStrategy);
URI url = url();
String path = url.getPath();
stubRequests(path);
HttpRequest request = HttpRequest.createTestRequest(url.toString(), com.yahoo.jdisc.http.HttpRequest.Method.GET);
ProxyRequest proxyRequest = ProxyRequest.tryOne(url, Path.parse(path), request);
// Connections are reused
assertEquals(200, proxy.handle(proxyRequest).getStatus());
assertEquals(3, connectionReuseStrategy.reusedConnections.get(url.getHost()).intValue());
}
private URI url() {
return URI.create("http://127.0.0.1:" + wireMock.getPort() + "/");
}
private void stubRequests(String path) {
String retryScenario = "Retry scenario";
String retryRequest = "Retry request 1";
String retryRequestAgain = "Retry request 2";
wireMock.stubFor(get(urlEqualTo(path)).inScenario(retryScenario)
.whenScenarioStateIs(Scenario.STARTED)
.willSetStateTo(retryRequest)
.willReturn(aResponse().withStatus(500)));
wireMock.stubFor(get(urlEqualTo(path)).inScenario(retryScenario)
.whenScenarioStateIs(retryRequest)
.willSetStateTo(retryRequestAgain)
.willReturn(aResponse().withStatus(500)));
wireMock.stubFor(get(urlEqualTo(path)).inScenario(retryScenario)
.whenScenarioStateIs(retryRequestAgain)
.willReturn(aResponse().withBody("OK")));
}
private static class CountingConnectionReuseStrategy extends ConfigServerRestExecutorImpl.ConnectionReuseStrategy {
private final Map<String, Integer> reusedConnections = new HashMap<>();
public CountingConnectionReuseStrategy(Set<String> vips) {
super(vips);
}
@Override
public boolean keepAlive(org.apache.http.HttpResponse response, HttpContext context) {
boolean keepAlive = super.keepAlive(response, context);
String host = HttpCoreContext.adapt(context).getTargetHost().getHostName();
reusedConnections.putIfAbsent(host, 0);
if (keepAlive) reusedConnections.compute(host, (ignored, count) -> ++count);
return keepAlive;
}
}
}
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