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Google HTTP Client Library for Java. Functionality that works on all supported Java platforms,
including Java 5 (or higher) desktop (SE) and web (EE), Android, and Google App Engine.
/*
* Copyright (c) 2010 Google 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.google.api.client.http.apache;
import com.google.api.client.http.HttpMethods;
import com.google.api.client.http.HttpRequest;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.util.Beta;
import com.google.api.client.util.Preconditions;
import com.google.api.client.util.SecurityUtils;
import com.google.api.client.util.SslUtils;
import java.io.IOException;
import java.io.InputStream;
import java.net.ProxySelector;
import java.security.GeneralSecurityException;
import java.security.KeyStore;
import java.security.cert.CertificateFactory;
import javax.net.ssl.SSLContext;
import org.apache.http.HttpHost;
import org.apache.http.HttpVersion;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpHead;
import org.apache.http.client.methods.HttpOptions;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.client.methods.HttpTrace;
import org.apache.http.client.params.ClientPNames;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.params.ConnManagerParams;
import org.apache.http.conn.params.ConnPerRouteBean;
import org.apache.http.conn.params.ConnRouteParams;
import org.apache.http.conn.scheme.PlainSocketFactory;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.client.DefaultHttpRequestRetryHandler;
import org.apache.http.impl.conn.DefaultHttpRoutePlanner;
import org.apache.http.impl.conn.ProxySelectorRoutePlanner;
import org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.apache.http.params.HttpProtocolParams;
/**
* Thread-safe HTTP transport based on the Apache HTTP Client library.
*
*
* Implementation is thread-safe, as long as any parameter modification to the
* {@link #getHttpClient() Apache HTTP Client} is only done at initialization time. For maximum
* efficiency, applications should use a single globally-shared instance of the HTTP transport.
*
*
*
* Default settings are specified in {@link #newDefaultHttpClient()}. Use the
* {@link #ApacheHttpTransport(HttpClient)} constructor to override the Apache HTTP Client used.
* Alternatively, use {@link #ApacheHttpTransport()} and change the {@link #getHttpClient()}. Please
* read the Apache HTTP
* Client connection management tutorial for more complex configuration options.
*
*
* @since 1.0
* @author Yaniv Inbar
*/
public final class ApacheHttpTransport extends HttpTransport {
/** Apache HTTP client. */
private final HttpClient httpClient;
/**
* Constructor that uses {@link #newDefaultHttpClient()} for the Apache HTTP client.
*
*
* Use {@link Builder} to modify HTTP client options.
*
*
* @since 1.3
*/
public ApacheHttpTransport() {
this(newDefaultHttpClient());
}
/**
* Constructor that allows an alternative Apache HTTP client to be used.
*
*
* Note that a few settings are overridden:
*
*
* - HTTP version is set to 1.1 using {@link HttpProtocolParams#setVersion} with
* {@link HttpVersion#HTTP_1_1}.
* - Redirects are disabled using {@link ClientPNames#HANDLE_REDIRECTS}.
* - {@link ConnManagerParams#setTimeout} and {@link HttpConnectionParams#setConnectionTimeout}
* are set on each request based on {@link HttpRequest#getConnectTimeout()}.
* - {@link HttpConnectionParams#setSoTimeout} is set on each request based on
* {@link HttpRequest#getReadTimeout()}.
*
*
*
* Use {@link Builder} for a more user-friendly way to modify the HTTP client options.
*
*
* @param httpClient Apache HTTP client to use
*
* @since 1.6
*/
public ApacheHttpTransport(HttpClient httpClient) {
this.httpClient = httpClient;
HttpParams params = httpClient.getParams();
if (params == null) {
params = newDefaultHttpClient().getParams();
}
HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
params.setBooleanParameter(ClientPNames.HANDLE_REDIRECTS, false);
}
/**
* Creates a new instance of the Apache HTTP client that is used by the
* {@link #ApacheHttpTransport()} constructor.
*
*
* Use this constructor if you want to customize the default Apache HTTP client. Settings:
*
*
* - The client connection manager is set to {@link ThreadSafeClientConnManager}.
* - The socket buffer size is set to 8192 using
* {@link HttpConnectionParams#setSocketBufferSize}.
*
* - The route planner uses {@link ProxySelectorRoutePlanner} with
* {@link ProxySelector#getDefault()}, which uses the proxy settings from system
* properties.
*
*
* @return new instance of the Apache HTTP client
* @since 1.6
*/
public static DefaultHttpClient newDefaultHttpClient() {
return newDefaultHttpClient(
SSLSocketFactory.getSocketFactory(), newDefaultHttpParams(), ProxySelector.getDefault());
}
/** Returns a new instance of the default HTTP parameters we use. */
static HttpParams newDefaultHttpParams() {
HttpParams params = new BasicHttpParams();
// Turn off stale checking. Our connections break all the time anyway,
// and it's not worth it to pay the penalty of checking every time.
HttpConnectionParams.setStaleCheckingEnabled(params, false);
HttpConnectionParams.setSocketBufferSize(params, 8192);
ConnManagerParams.setMaxTotalConnections(params, 200);
ConnManagerParams.setMaxConnectionsPerRoute(params, new ConnPerRouteBean(20));
return params;
}
/**
* Creates a new instance of the Apache HTTP client that is used by the
* {@link #ApacheHttpTransport()} constructor.
*
* @param socketFactory SSL socket factory
* @param params HTTP parameters
* @param proxySelector HTTP proxy selector to use {@link ProxySelectorRoutePlanner} or
* {@code null} for {@link DefaultHttpRoutePlanner}
* @return new instance of the Apache HTTP client
*/
static DefaultHttpClient newDefaultHttpClient(
SSLSocketFactory socketFactory, HttpParams params, ProxySelector proxySelector) {
// See http://hc.apache.org/httpcomponents-client-ga/tutorial/html/connmgmt.html
SchemeRegistry registry = new SchemeRegistry();
registry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
registry.register(new Scheme("https", socketFactory, 443));
ClientConnectionManager connectionManager = new ThreadSafeClientConnManager(params, registry);
DefaultHttpClient defaultHttpClient = new DefaultHttpClient(connectionManager, params);
defaultHttpClient.setHttpRequestRetryHandler(new DefaultHttpRequestRetryHandler(0, false));
if (proxySelector != null) {
defaultHttpClient.setRoutePlanner(new ProxySelectorRoutePlanner(registry, proxySelector));
}
return defaultHttpClient;
}
@Override
public boolean supportsMethod(String method) {
return true;
}
@Override
protected ApacheHttpRequest buildRequest(String method, String url) {
HttpRequestBase requestBase;
if (method.equals(HttpMethods.DELETE)) {
requestBase = new HttpDelete(url);
} else if (method.equals(HttpMethods.GET)) {
requestBase = new HttpGet(url);
} else if (method.equals(HttpMethods.HEAD)) {
requestBase = new HttpHead(url);
} else if (method.equals(HttpMethods.POST)) {
requestBase = new HttpPost(url);
} else if (method.equals(HttpMethods.PUT)) {
requestBase = new HttpPut(url);
} else if (method.equals(HttpMethods.TRACE)) {
requestBase = new HttpTrace(url);
} else if (method.equals(HttpMethods.OPTIONS)) {
requestBase = new HttpOptions(url);
} else {
requestBase = new HttpExtensionMethod(method, url);
}
return new ApacheHttpRequest(httpClient, requestBase);
}
/**
* Shuts down the connection manager and releases allocated resources. This includes closing all
* connections, whether they are currently used or not.
*
* @since 1.4
*/
@Override
public void shutdown() {
httpClient.getConnectionManager().shutdown();
}
/**
* Returns the Apache HTTP client.
*
* @since 1.5
*/
public HttpClient getHttpClient() {
return httpClient;
}
/**
* Builder for {@link ApacheHttpTransport}.
*
*
* Implementation is not thread-safe.
*
*
* @since 1.13
*/
public static final class Builder {
/** SSL socket factory. */
private SSLSocketFactory socketFactory = SSLSocketFactory.getSocketFactory();
/** HTTP parameters. */
private HttpParams params = newDefaultHttpParams();
/**
* HTTP proxy selector to use {@link ProxySelectorRoutePlanner} or {@code null} for
* {@link DefaultHttpRoutePlanner}.
*/
private ProxySelector proxySelector = ProxySelector.getDefault();
/**
* Sets the HTTP proxy to use {@link DefaultHttpRoutePlanner} or {@code null} to use
* {@link #setProxySelector(ProxySelector)} with {@link ProxySelector#getDefault()}.
*
*
* By default it is {@code null}, which uses the proxy settings from system
* properties.
*
*
*
* For example:
*
*
*
setProxy(new HttpHost("127.0.0.1", 8080))
*
*/
public Builder setProxy(HttpHost proxy) {
ConnRouteParams.setDefaultProxy(params, proxy);
if (proxy != null) {
proxySelector = null;
}
return this;
}
/**
* Sets the HTTP proxy selector to use {@link ProxySelectorRoutePlanner} or {@code null} for
* {@link DefaultHttpRoutePlanner}.
*
*
* By default it is {@link ProxySelector#getDefault()} which uses the proxy settings from system
* properties.
*
*/
public Builder setProxySelector(ProxySelector proxySelector) {
this.proxySelector = proxySelector;
if (proxySelector != null) {
ConnRouteParams.setDefaultProxy(params, null);
}
return this;
}
/**
* Sets the SSL socket factory based on root certificates in a Java KeyStore.
*
*
* Example usage:
*
*
*
trustCertificatesFromJavaKeyStore(new FileInputStream("certs.jks"), "password");
*
*
* @param keyStoreStream input stream to the key store (closed at the end of this method in a
* finally block)
* @param storePass password protecting the key store file
* @since 1.14
*/
public Builder trustCertificatesFromJavaKeyStore(InputStream keyStoreStream, String storePass)
throws GeneralSecurityException, IOException {
KeyStore trustStore = SecurityUtils.getJavaKeyStore();
SecurityUtils.loadKeyStore(trustStore, keyStoreStream, storePass);
return trustCertificates(trustStore);
}
/**
* Sets the SSL socket factory based root certificates generated from the specified stream using
* {@link CertificateFactory#generateCertificates(InputStream)}.
*
*
* Example usage:
*
*
*
trustCertificatesFromStream(new FileInputStream("certs.pem"));
*
*
* @param certificateStream certificate stream
* @since 1.14
*/
public Builder trustCertificatesFromStream(InputStream certificateStream)
throws GeneralSecurityException, IOException {
KeyStore trustStore = SecurityUtils.getJavaKeyStore();
trustStore.load(null, null);
SecurityUtils.loadKeyStoreFromCertificates(
trustStore, SecurityUtils.getX509CertificateFactory(), certificateStream);
return trustCertificates(trustStore);
}
/**
* Sets the SSL socket factory based on a root certificate trust store.
*
* @param trustStore certificate trust store (use for example {@link SecurityUtils#loadKeyStore}
* or {@link SecurityUtils#loadKeyStoreFromCertificates})
*
* @since 1.14
*/
public Builder trustCertificates(KeyStore trustStore) throws GeneralSecurityException {
SSLContext sslContext = SslUtils.getTlsSslContext();
SslUtils.initSslContext(sslContext, trustStore, SslUtils.getPkixTrustManagerFactory());
return setSocketFactory(new SSLSocketFactoryExtension(sslContext));
}
/**
* {@link Beta}
* Disables validating server SSL certificates by setting the SSL socket factory using
* {@link SslUtils#trustAllSSLContext()} for the SSL context and
* {@link SSLSocketFactory#ALLOW_ALL_HOSTNAME_VERIFIER} for the host name verifier.
*
*
* Be careful! Disabling certificate validation is dangerous and should only be done in testing
* environments.
*
*/
@Beta
public Builder doNotValidateCertificate() throws GeneralSecurityException {
socketFactory = new SSLSocketFactoryExtension(SslUtils.trustAllSSLContext());
socketFactory.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
return this;
}
/** Sets the SSL socket factory ({@link SSLSocketFactory#getSocketFactory()} by default). */
public Builder setSocketFactory(SSLSocketFactory socketFactory) {
this.socketFactory = Preconditions.checkNotNull(socketFactory);
return this;
}
/** Returns the SSL socket factory ({@link SSLSocketFactory#getSocketFactory()} by default). */
public SSLSocketFactory getSSLSocketFactory() {
return socketFactory;
}
/** Returns the HTTP parameters. */
public HttpParams getHttpParams() {
return params;
}
/** Returns a new instance of {@link ApacheHttpTransport} based on the options. */
public ApacheHttpTransport build() {
return new ApacheHttpTransport(newDefaultHttpClient(socketFactory, params, proxySelector));
}
}
}