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components/proxy/src/main/java/com/hotels/styx/routing/handlers/HostProxy.java
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| /* | ||
| Copyright (C) 2013-2019 Expedia Inc. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
| package com.hotels.styx.routing.handlers; | ||
|
|
||
| import com.google.common.annotations.VisibleForTesting; | ||
| import com.google.common.net.HostAndPort; | ||
| import com.hotels.styx.api.Eventual; | ||
| import com.hotels.styx.api.HttpInterceptor; | ||
| import com.hotels.styx.api.LiveHttpRequest; | ||
| import com.hotels.styx.api.LiveHttpResponse; | ||
| import com.hotels.styx.api.extension.Origin; | ||
| import com.hotels.styx.api.extension.service.ConnectionPoolSettings; | ||
| import com.hotels.styx.api.extension.service.TlsSettings; | ||
| import com.hotels.styx.client.Connection; | ||
| import com.hotels.styx.client.OriginStatsFactory; | ||
| import com.hotels.styx.client.StyxHostHttpClient; | ||
| import com.hotels.styx.client.applications.metrics.OriginMetrics; | ||
| import com.hotels.styx.client.connectionpool.ConnectionPool; | ||
| import com.hotels.styx.client.connectionpool.ExpiringConnectionFactory; | ||
| import com.hotels.styx.client.connectionpool.SimpleConnectionPoolFactory; | ||
| import com.hotels.styx.client.netty.connectionpool.NettyConnectionFactory; | ||
| import com.hotels.styx.config.schema.Schema; | ||
| import com.hotels.styx.infrastructure.configuration.yaml.JsonNodeConfig; | ||
| import com.hotels.styx.routing.RoutingObject; | ||
| import com.hotels.styx.routing.config.HttpHandlerFactory; | ||
| import com.hotels.styx.routing.config.RoutingObjectDefinition; | ||
| import org.jetbrains.annotations.NotNull; | ||
|
|
||
| import java.util.List; | ||
| import java.util.Optional; | ||
| import java.util.concurrent.CompletableFuture; | ||
|
|
||
| import static com.hotels.styx.api.extension.Origin.newOriginBuilder; | ||
| import static com.hotels.styx.api.extension.service.ConnectionPoolSettings.defaultConnectionPoolSettings; | ||
| import static com.hotels.styx.client.HttpRequestOperationFactory.Builder.httpRequestOperationFactoryBuilder; | ||
| import static com.hotels.styx.config.schema.SchemaDsl.atLeastOne; | ||
| import static com.hotels.styx.config.schema.SchemaDsl.bool; | ||
| import static com.hotels.styx.config.schema.SchemaDsl.field; | ||
| import static com.hotels.styx.config.schema.SchemaDsl.integer; | ||
| import static com.hotels.styx.config.schema.SchemaDsl.list; | ||
| import static com.hotels.styx.config.schema.SchemaDsl.object; | ||
| import static com.hotels.styx.config.schema.SchemaDsl.optional; | ||
| import static com.hotels.styx.config.schema.SchemaDsl.string; | ||
| import static com.hotels.styx.routing.config.RoutingSupport.missingAttributeError; | ||
| import static java.lang.String.format; | ||
| import static java.lang.String.join; | ||
| import static java.util.Objects.requireNonNull; | ||
| import static java.util.concurrent.CompletableFuture.completedFuture; | ||
|
|
||
| /** | ||
| * A routing object that proxies all incoming traffic to a remote host. | ||
| */ | ||
| public class HostProxy implements RoutingObject { | ||
| public static final Schema.FieldType SCHEMA = object( | ||
| field("host", string()), | ||
| optional("tlsSettings", object( | ||
| optional("trustAllCerts", bool()), | ||
| optional("sslProvider", string()), | ||
| optional("trustStorePath", string()), | ||
| optional("trustStorePassword", string()), | ||
| optional("protocols", list(string())), | ||
| optional("cipherSuites", list(string())), | ||
| optional("additionalCerts", list(object( | ||
| field("alias", string()), | ||
| field("certificatePath", string()) | ||
| ))), | ||
| atLeastOne("trustAllCerts", | ||
| "trustStorePath", | ||
| "trustStorePassword", | ||
| "protocols", | ||
| "cipherSuites", | ||
| "additionalCerts") | ||
| )), | ||
| optional("connectionPool", object( | ||
| optional("maxConnections", integer()), | ||
| optional("maxPendingConnections", integer()), | ||
| optional("connectTimeoutMillis", integer()), | ||
| optional("socketTimeoutMillis", integer()), | ||
| optional("pendingConnectionTimeoutMillis", integer()), | ||
| optional("connectionExpirationSeconds", integer()), | ||
| atLeastOne("maxConnections", | ||
| "maxPendingConnections", | ||
| "connectTimeoutMillis", | ||
| "socketTimeoutMillis", | ||
| "pendingConnectionTimeoutMillis", | ||
| "connectionExpirationSeconds") | ||
| )), | ||
| optional("responseTimeoutMillis", integer()), | ||
| optional("metricPrefix", string()) | ||
| ); | ||
|
|
||
| private final String errorMessage; | ||
| private final StyxHostHttpClient client; | ||
| private volatile boolean active = true; | ||
|
|
||
| @VisibleForTesting | ||
| final HostAndPort hostAndPort; | ||
|
|
||
| public HostProxy(HostAndPort hostAndPort, StyxHostHttpClient client) { | ||
| this.hostAndPort = requireNonNull(hostAndPort); | ||
| this.errorMessage = format("HostProxy %s:%d is stopped but received traffic.", | ||
| hostAndPort.getHostText(), | ||
| hostAndPort.getPort()); | ||
| this.client = requireNonNull(client); | ||
| } | ||
|
|
||
| @Override | ||
| public Eventual<LiveHttpResponse> handle(LiveHttpRequest request, HttpInterceptor.Context context) { | ||
| if (active) { | ||
| return new Eventual<>(client.sendRequest(request)); | ||
| } else { | ||
| return Eventual.error(new IllegalStateException(errorMessage)); | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public CompletableFuture<Void> stop() { | ||
| active = false; | ||
| client.close(); | ||
| return completedFuture(null); | ||
| } | ||
|
|
||
| /** | ||
| * A factory for creating HostProxy routingObject objects. | ||
| */ | ||
| public static class Factory implements HttpHandlerFactory { | ||
| private static final int DEFAULT_REQUEST_TIMEOUT = 60000; | ||
| private static final int DEFAULT_TLS_PORT = 443; | ||
| private static final int DEFAULT_HTTP_PORT = 80; | ||
|
|
||
| @Override | ||
| public RoutingObject build(List<String> parents, Context context, RoutingObjectDefinition configBlock) { | ||
| JsonNodeConfig config = new JsonNodeConfig(configBlock.config()); | ||
|
|
||
| ConnectionPoolSettings poolSettings = config.get("connectionPool", ConnectionPoolSettings.class) | ||
| .orElse(defaultConnectionPoolSettings()); | ||
|
|
||
| TlsSettings tlsSettings = config.get("tlsSettings", TlsSettings.class) | ||
| .orElse(null); | ||
|
|
||
| int responseTimeoutMillis = config.get("responseTimeoutMillis", Integer.class) | ||
| .orElse(DEFAULT_REQUEST_TIMEOUT); | ||
|
|
||
| String metricPrefix = config.get("metricPrefix", String.class) | ||
| .orElse("routing.objects.hostProxy"); | ||
|
|
||
| HostAndPort hostAndPort = config.get("host") | ||
| .map(HostAndPort::fromString) | ||
| .map(it -> addDefaultPort(it, tlsSettings)) | ||
| .orElseThrow(() -> missingAttributeError(configBlock, join(".", parents), "host")); | ||
|
|
||
| return createHostProxyHandler(context, hostAndPort, poolSettings, tlsSettings, responseTimeoutMillis, metricPrefix); | ||
| } | ||
|
|
||
| private static HostAndPort addDefaultPort(HostAndPort hostAndPort, TlsSettings tlsSettings) { | ||
| if (hostAndPort.hasPort()) { | ||
| return hostAndPort; | ||
| } | ||
|
|
||
| int defaultPort = Optional.ofNullable(tlsSettings) | ||
| .map(it -> DEFAULT_TLS_PORT) | ||
| .orElse(DEFAULT_HTTP_PORT); | ||
|
|
||
| return HostAndPort.fromParts(hostAndPort.getHostText(), defaultPort); | ||
| } | ||
|
|
||
| @NotNull | ||
| private static HostProxy createHostProxyHandler( | ||
| Context context, | ||
| HostAndPort hostAndPort, | ||
| ConnectionPoolSettings poolSettings, | ||
| TlsSettings tlsSettings, | ||
| int responseTimeoutMillis, | ||
| String metricPrefix) { | ||
|
|
||
| Origin origin = newOriginBuilder(hostAndPort.getHostText(), hostAndPort.getPort()) | ||
| .applicationId(metricPrefix) | ||
| .id(format("%s:%s", hostAndPort.getHostText(), hostAndPort.getPort())) | ||
| .build(); | ||
|
|
||
| OriginMetrics originMetrics = OriginMetrics.create( | ||
| origin, | ||
| context.environment().metricRegistry()); | ||
|
|
||
| ConnectionPool.Factory connectionPoolFactory = new SimpleConnectionPoolFactory.Builder() | ||
| .connectionFactory( | ||
| connectionFactory( | ||
| tlsSettings, | ||
| responseTimeoutMillis, | ||
| theOrigin -> originMetrics, | ||
| poolSettings.connectionExpirationSeconds())) | ||
| .connectionPoolSettings(poolSettings) | ||
| .metricRegistry(context.environment().metricRegistry()) | ||
| .build(); | ||
|
|
||
| return new HostProxy(hostAndPort, StyxHostHttpClient.create(connectionPoolFactory.create(origin))); | ||
| } | ||
|
|
||
| private static Connection.Factory connectionFactory( | ||
| TlsSettings tlsSettings, | ||
| int responseTimeoutMillis, | ||
| OriginStatsFactory originStatsFactory, | ||
| long connectionExpiration) { | ||
|
|
||
| NettyConnectionFactory factory = new NettyConnectionFactory.Builder() | ||
| .httpRequestOperationFactory( | ||
| httpRequestOperationFactoryBuilder() | ||
| .flowControlEnabled(true) | ||
| .originStatsFactory(originStatsFactory) | ||
| .responseTimeoutMillis(responseTimeoutMillis) | ||
| .build() | ||
| ) | ||
| .tlsSettings(Optional.ofNullable(tlsSettings).orElse(null)) | ||
| .build(); | ||
|
|
||
| if (connectionExpiration > 0) { | ||
| return new ExpiringConnectionFactory(connectionExpiration, factory); | ||
| } else { | ||
| return factory; | ||
| } | ||
| } | ||
|
|
||
| } | ||
|
|
||
| } |
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