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DefaultSpringHttpClientFactory.java
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DefaultSpringHttpClientFactory.java
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/**
* SPDX-FileCopyrightText: 2018-2023 SAP SE or an SAP affiliate company and Cloud Security Client Java contributors
* SPDX-License-Identifier: Apache-2.0
*/
package com.sap.cloud.security.xsuaa.token.authentication.httpclient;
import com.sap.cloud.security.client.HttpClientException;
import com.sap.cloud.security.config.ClientIdentity;
import com.sap.cloud.security.mtls.SSLContextFactory;
import org.apache.hc.client5.http.config.ConnectionConfig;
import org.apache.hc.client5.http.config.RequestConfig;
import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
import org.apache.hc.client5.http.impl.classic.HttpClients;
import org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManagerBuilder;
import org.apache.hc.client5.http.io.HttpClientConnectionManager;
import org.apache.hc.client5.http.ssl.SSLConnectionSocketFactoryBuilder;
import org.apache.hc.core5.http.ssl.TLS;
import org.apache.hc.core5.util.Timeout;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.web.client.RestTemplate;
import javax.net.ssl.SSLContext;
import java.io.IOException;
import java.security.GeneralSecurityException;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
public class DefaultSpringHttpClientFactory implements SpringHttpClientFactory {
private static final Logger LOGGER = LoggerFactory.getLogger(DefaultSpringHttpClientFactory.class);
final Set<String> httpClientsCreated = Collections.synchronizedSet(new HashSet<>());
final ConcurrentHashMap<String, HttpClientConnectionManager> sslConnectionManagers = new ConcurrentHashMap<>();
private static final Timeout DEFAULT_TIMEOUT = Timeout.ofSeconds(5);
private static final Timeout DEFAULT_SOCKET_TIMEOUT = Timeout.ofSeconds(5);
private static final int MAX_CONNECTIONS_PER_ROUTE = 4; // default is 2
private static final int MAX_CONNECTIONS = 20;
@Override
public RestTemplate createRestTemplateClient(ClientIdentity clientIdentity) {
HttpComponentsClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactory();
requestFactory.setHttpClient(createClient(clientIdentity));
return new RestTemplate(requestFactory);
}
private CloseableHttpClient createClient(ClientIdentity clientIdentity)
throws HttpClientException {
String clientId = clientIdentity != null ? clientIdentity.getId() : null;
if (httpClientsCreated.contains(clientId)) {
LOGGER.warn("Application has already created HttpClient for clientId = {}, please check.", clientId);
}
httpClientsCreated.add(clientId);
if (clientId == null || !clientIdentity.isCertificateBased()) {
return org.apache.hc.client5.http.impl.classic.HttpClients.custom().disableRedirectHandling().build();
} else {
return createTLSClient(clientIdentity);
}
}
private org.apache.hc.client5.http.impl.classic.CloseableHttpClient createTLSClient(
ClientIdentity clientIdentity) {
final RequestConfig defaultRequestConfig;
final ConnectionConfig defaultConnectionConfig;
defaultRequestConfig = org.apache.hc.client5.http.config.RequestConfig.custom()
.setConnectionRequestTimeout(DEFAULT_TIMEOUT)
.setRedirectsEnabled(false)
.build();
defaultConnectionConfig = org.apache.hc.client5.http.config.ConnectionConfig.custom()
.setSocketTimeout(DEFAULT_SOCKET_TIMEOUT)
.setConnectTimeout(DEFAULT_TIMEOUT)
.build();
SSLContext context;
try {
context = SSLContextFactory.getInstance().create(clientIdentity);
} catch (IOException | GeneralSecurityException e) {
throw new HttpClientException(
String.format("Couldn't set up https client for service provider %s. %s.",
clientIdentity.getId(), e.getLocalizedMessage()));
}
HttpClientConnectionManager connectionManager = sslConnectionManagers.computeIfAbsent(clientIdentity.getId(),
cid -> PoolingHttpClientConnectionManagerBuilder.create()
.setDefaultConnectionConfig(defaultConnectionConfig)
.setMaxConnPerRoute(MAX_CONNECTIONS_PER_ROUTE)
.setMaxConnTotal(MAX_CONNECTIONS)
.setSSLSocketFactory(SSLConnectionSocketFactoryBuilder.create()
.setTlsVersions(TLS.V_1_2) // TLS 1.3 not yet supported by cf routing
.setSslContext(context)
.build())
.build());
return HttpClients.custom()
.setDefaultRequestConfig(defaultRequestConfig)
.setConnectionManager(connectionManager)
.build();
}
}