com.ericsson.gerrit.plugins.highavailability.forwarder.rest.HttpClientProvider.java Source code

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Here is the source code for com.ericsson.gerrit.plugins.highavailability.forwarder.rest.HttpClientProvider.java

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// Copyright (C) 2015 The Android Open Source Project
//
// 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.ericsson.gerrit.plugins.highavailability.forwarder.rest;

import com.ericsson.gerrit.plugins.highavailability.Configuration;
import com.google.inject.Inject;
import com.google.inject.Provider;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.X509Certificate;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.HttpClientConnectionManager;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/** Provides an HTTP client with SSL capabilities. */
class HttpClientProvider implements Provider<CloseableHttpClient> {
    private static final Logger log = LoggerFactory.getLogger(HttpClientProvider.class);
    private static final int CONNECTIONS_PER_ROUTE = 100;
    // Up to 2 target instances with the max number of connections per host:
    private static final int MAX_CONNECTIONS = 2 * CONNECTIONS_PER_ROUTE;

    private static final int MAX_CONNECTION_INACTIVITY = 10000;

    private final Configuration cfg;
    private final SSLConnectionSocketFactory sslSocketFactory;

    @Inject
    HttpClientProvider(Configuration cfg) {
        this.cfg = cfg;
        this.sslSocketFactory = buildSslSocketFactory();
    }

    @Override
    public CloseableHttpClient get() {
        return HttpClients.custom().setSSLSocketFactory(sslSocketFactory)
                .setConnectionManager(customConnectionManager()).setDefaultCredentialsProvider(buildCredentials())
                .setDefaultRequestConfig(customRequestConfig()).build();
    }

    private RequestConfig customRequestConfig() {
        return RequestConfig.custom().setConnectTimeout(cfg.http().connectionTimeout())
                .setSocketTimeout(cfg.http().socketTimeout())
                .setConnectionRequestTimeout(cfg.http().connectionTimeout()).build();
    }

    private HttpClientConnectionManager customConnectionManager() {
        Registry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create()
                .register("https", sslSocketFactory).register("http", PlainConnectionSocketFactory.INSTANCE)
                .build();
        PoolingHttpClientConnectionManager connManager = new PoolingHttpClientConnectionManager(
                socketFactoryRegistry);
        connManager.setDefaultMaxPerRoute(CONNECTIONS_PER_ROUTE);
        connManager.setMaxTotal(MAX_CONNECTIONS);
        connManager.setValidateAfterInactivity(MAX_CONNECTION_INACTIVITY);
        return connManager;
    }

    private static SSLConnectionSocketFactory buildSslSocketFactory() {
        return new SSLConnectionSocketFactory(buildSslContext(), NoopHostnameVerifier.INSTANCE);
    }

    private static SSLContext buildSslContext() {
        try {
            TrustManager[] trustAllCerts = new TrustManager[] { new DummyX509TrustManager() };
            SSLContext context = SSLContext.getInstance("TLS");
            context.init(null, trustAllCerts, null);
            return context;
        } catch (KeyManagementException | NoSuchAlgorithmException e) {
            log.warn("Error building SSLContext object", e);
            return null;
        }
    }

    private BasicCredentialsProvider buildCredentials() {
        BasicCredentialsProvider creds = new BasicCredentialsProvider();
        creds.setCredentials(AuthScope.ANY,
                new UsernamePasswordCredentials(cfg.http().user(), cfg.http().password()));
        return creds;
    }

    private static class DummyX509TrustManager implements X509TrustManager {
        @Override
        public X509Certificate[] getAcceptedIssuers() {
            return new X509Certificate[0];
        }

        @Override
        public void checkClientTrusted(X509Certificate[] certs, String authType) {
            // no check
        }

        @Override
        public void checkServerTrusted(X509Certificate[] certs, String authType) {
            // no check
        }
    }
}