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*
* Copyright (c) 2011-2013 Oracle and/or its affiliates. All rights reserved.
*
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* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* http://glassfish.java.net/public/CDDL+GPL_1_1.html
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* language governing permissions and limitations under the License.
*
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* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
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* exception as provided by Oracle in the GPL Version 2 section of the License
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*
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*/
package org.glassfish.jersey.client;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.net.HttpURLConnection;
import java.net.ProtocolException;
import java.net.URL;
import java.util.List;
import java.util.Map;
import java.util.concurrent.Future;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.ws.rs.ProcessingException;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.core.Response;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import org.glassfish.jersey.client.internal.LocalizationMessages;
import org.glassfish.jersey.client.spi.AsyncConnectorCallback;
import org.glassfish.jersey.client.spi.Connector;
import org.glassfish.jersey.internal.util.PropertiesHelper;
import org.glassfish.jersey.internal.util.collection.UnsafeValue;
import org.glassfish.jersey.internal.util.collection.Values;
import org.glassfish.jersey.message.internal.OutboundMessageContext;
import org.glassfish.jersey.message.internal.Statuses;
import com.google.common.base.Predicates;
import com.google.common.collect.Maps;
import com.google.common.util.concurrent.MoreExecutors;
/**
* Default client transport connector using {@link HttpURLConnection}.
*
* @author Marek Potociar (marek.potociar at oracle.com)
*/
public class HttpUrlConnector implements Connector {
private final ConnectionFactory connectionFactory;
/**
* A factory for {@link HttpURLConnection} instances.
*
* A factory may be used to create a {@link HttpURLConnection} and configure
* it in a custom manner that is not possible using the Client API.
*
* A factory instance may be registered with the constructor
* {@link HttpUrlConnector#HttpUrlConnector(HttpUrlConnector.ConnectionFactory)}.
* Then the {@link HttpUrlConnector} instance may be registered with a {@link JerseyClient}
* or {@link JerseyWebTarget} configuration via
* {@link ClientConfig#connector(org.glassfish.jersey.client.spi.Connector)}.
*/
public interface ConnectionFactory {
/**
* Get a {@link HttpURLConnection} for a given URL.
*
* Implementation of the method MUST be thread-safe and MUST ensure that
* a dedicated {@link HttpURLConnection} instance is returned for concurrent
* requests.
*
* @param url the endpoint URL.
* @return the {@link HttpURLConnection}.
* @throws java.io.IOException in case the connection cannot be provided.
*/
public HttpURLConnection getConnection(URL url) throws IOException;
}
/**
* Create default {@link HttpURLConnection}-based Jersey client {@link Connector connector}.
*/
public HttpUrlConnector() {
connectionFactory = null;
}
/**
* Create default {@link HttpURLConnection}-based Jersey client {@link Connector connector}.
*
* @param connectionFactory {@link HttpURLConnection} instance factory.
*/
public HttpUrlConnector(ConnectionFactory connectionFactory) {
this.connectionFactory = connectionFactory;
}
private static InputStream getInputStream(final HttpURLConnection uc) throws IOException {
return new InputStream() {
private final UnsafeValue in = Values.lazy(new UnsafeValue() {
@Override
public InputStream get() throws IOException {
if (uc.getResponseCode() < 300) {
return uc.getInputStream();
} else {
InputStream ein = uc.getErrorStream();
return (ein != null) ? ein : new ByteArrayInputStream(new byte[0]);
}
}
});
@Override
public int read() throws IOException {
return in.get().read();
}
@Override
public int read(byte[] b) throws IOException {
return in.get().read(b);
}
@Override
public int read(byte[] b, int off, int len) throws IOException {
return in.get().read(b, off, len);
}
@Override
public long skip(long n) throws IOException {
return in.get().skip(n);
}
@Override
public int available() throws IOException {
return in.get().available();
}
@Override
public void close() throws IOException {
in.get().close();
}
@Override
public void mark(int readLimit) {
try {
in.get().mark(readLimit);
} catch (IOException e) {
throw new IllegalStateException("Unable to retrieve the underlying input stream.", e);
}
}
@Override
public void reset() throws IOException {
in.get().reset();
}
@Override
public boolean markSupported() {
try {
return in.get().markSupported();
} catch (IOException e) {
throw new IllegalStateException("Unable to retrieve the underlying input stream.", e);
}
}
};
}
@Override
public ClientResponse apply(ClientRequest request) {
try {
return _apply(request);
} catch (IOException ex) {
throw new ProcessingException(ex);
}
}
@Override
public Future apply(final ClientRequest request, final AsyncConnectorCallback callback) {
return MoreExecutors.sameThreadExecutor().submit(new Runnable() {
@Override
public void run() {
try {
callback.response(_apply(request));
} catch (IOException ex) {
callback.failure(new ProcessingException(ex));
} catch (Throwable t) {
callback.failure(t);
}
}
});
}
@Override
public void close() {
// do nothing
}
private ClientResponse _apply(final ClientRequest request) throws IOException {
final Map configurationProperties = request.getConfiguration().getProperties();
final HttpURLConnection uc;
final URL endpointUrl = request.getUri().toURL();
if (this.connectionFactory == null) {
uc = (HttpURLConnection) endpointUrl.openConnection();
} else {
uc = this.connectionFactory.getConnection(endpointUrl);
}
uc.setDoInput(true);
final String httpMethod = request.getMethod();
if (PropertiesHelper.getValue(configurationProperties,
ClientProperties.HTTP_URL_CONNECTION_SET_METHOD_WORKAROUND, false)) {
setRequestMethodViaJreBugWorkaround(uc, httpMethod);
} else {
uc.setRequestMethod(httpMethod);
}
uc.setInstanceFollowRedirects(PropertiesHelper.getValue(configurationProperties,
ClientProperties.FOLLOW_REDIRECTS, true));
uc.setConnectTimeout(PropertiesHelper.getValue(configurationProperties,
ClientProperties.CONNECT_TIMEOUT, 0));
uc.setReadTimeout(PropertiesHelper.getValue(configurationProperties,
ClientProperties.READ_TIMEOUT, 0));
if (uc instanceof HttpsURLConnection) {
HttpsURLConnection suc = (HttpsURLConnection) uc;
final JerseyClient client = request.getClient();
final HostnameVerifier verifier = client.getHostnameVerifier();
if (verifier != null) {
suc.setHostnameVerifier(verifier);
}
suc.setSSLSocketFactory(client.getSslContext().getSocketFactory());
}
final Object entity = request.getEntity();
if (entity != null) {
uc.setDoOutput(true);
if (httpMethod.equalsIgnoreCase("GET")) {
final Logger logger = Logger.getLogger(HttpUrlConnector.class.getName());
if (logger.isLoggable(Level.INFO)) {
logger.log(Level.INFO, LocalizationMessages.HTTPURLCONNECTION_REPLACES_GET_WITH_ENTITY());
}
}
request.setStreamProvider(new OutboundMessageContext.StreamProvider() {
@Override
public OutputStream getOutputStream(int contentLength) throws IOException {
writeOutBoundHeaders(request.getStringHeaders(), uc);
return uc.getOutputStream();
}
});
request.writeEntity();
} else {
writeOutBoundHeaders(request.getStringHeaders(), uc);
}
final int code = uc.getResponseCode();
final String reasonPhrase = uc.getResponseMessage();
final Response.StatusType status = reasonPhrase == null ?
Statuses.from(code) : Statuses.from(code, reasonPhrase);
ClientResponse responseContext = new ClientResponse(
status, request);
responseContext.headers(Maps.>filterKeys(uc.getHeaderFields(), Predicates.notNull()));
responseContext.setEntityStream(getInputStream(uc));
return responseContext;
}
private void writeOutBoundHeaders(MultivaluedMap headers, HttpURLConnection uc) {
for (Map.Entry> header : headers.entrySet()) {
List headerValues = header.getValue();
if (headerValues.size() == 1) {
uc.setRequestProperty(header.getKey(), headerValues.get(0));
} else {
StringBuilder b = new StringBuilder();
boolean add = false;
for (Object value : headerValues) {
if (add) {
b.append(',');
}
add = true;
b.append(value);
}
uc.setRequestProperty(header.getKey(), b.toString());
}
}
}
/**
* Workaround for a bug in {@code HttpURLConnection.setRequestMethod(String)}
* The implementation of Sun/Oracle is throwing a {@code ProtocolException}
* when the method is other than the HTTP/1.1 default methods. So to use {@code PROPFIND}
* and others, we must apply this workaround.
*
* See issue http://java.net/jira/browse/JERSEY-639
*/
private static void setRequestMethodViaJreBugWorkaround(final HttpURLConnection httpURLConnection, final String method) {
try {
httpURLConnection.setRequestMethod(method); // Check whether we are running on a buggy JRE
} catch (final ProtocolException pe) {
try {
final Class httpURLConnectionClass = httpURLConnection.getClass();
final Field methodField = httpURLConnectionClass.getSuperclass().getDeclaredField("method");
methodField.setAccessible(true);
methodField.set(httpURLConnection, method);
} catch (final Exception e) {
throw new RuntimeException(e);
}
}
}
@Override
public String getName() {
return "HttpUrlConnection " + System.getProperty("java.version");
}
}