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//
// ========================================================================
// Copyright (c) 1995-2013 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.client;
import java.io.UnsupportedEncodingException;
import java.net.HttpCookie;
import java.net.URLEncoder;
import java.nio.charset.UnsupportedCharsetException;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
import org.eclipse.jetty.client.api.Authentication;
import org.eclipse.jetty.client.api.Connection;
import org.eclipse.jetty.client.api.ContentProvider;
import org.eclipse.jetty.client.api.Request;
import org.eclipse.jetty.client.api.Response;
import org.eclipse.jetty.client.util.StringContentProvider;
import org.eclipse.jetty.http.HttpField;
import org.eclipse.jetty.http.HttpFields;
import org.eclipse.jetty.http.HttpHeader;
import org.eclipse.jetty.http.HttpHeaderValue;
import org.eclipse.jetty.http.HttpMethod;
import org.eclipse.jetty.http.HttpVersion;
import org.eclipse.jetty.http.MimeTypes;
import org.eclipse.jetty.io.AbstractConnection;
import org.eclipse.jetty.io.EndPoint;
import org.eclipse.jetty.util.Fields;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
public class HttpConnection extends AbstractConnection implements Connection
{
private static final Logger LOG = Log.getLogger(HttpConnection.class);
private static final HttpField CHUNKED_FIELD = new HttpField(HttpHeader.TRANSFER_ENCODING, HttpHeaderValue.CHUNKED);
private final AtomicReference exchange = new AtomicReference<>();
private final HttpClient client;
private final HttpDestination destination;
private final HttpSender sender;
private final HttpReceiver receiver;
private long idleTimeout;
public HttpConnection(HttpClient client, EndPoint endPoint, HttpDestination destination)
{
super(endPoint, client.getExecutor(), client.isDispatchIO());
this.client = client;
this.destination = destination;
this.sender = new HttpSender(this);
this.receiver = new HttpReceiver(this);
}
public HttpClient getHttpClient()
{
return client;
}
public HttpDestination getDestination()
{
return destination;
}
@Override
public void onOpen()
{
super.onOpen();
fillInterested();
}
@Override
protected boolean onReadTimeout()
{
LOG.debug("{} idle timeout", this);
HttpExchange exchange = getExchange();
if (exchange != null)
idleTimeout();
else
destination.remove(this);
return true;
}
protected void idleTimeout()
{
receiver.idleTimeout();
}
@Override
public void send(Request request, Response.CompleteListener listener)
{
ArrayList listeners = new ArrayList<>(2);
if (request.getTimeout() > 0)
{
TimeoutCompleteListener timeoutListener = new TimeoutCompleteListener(request);
timeoutListener.schedule(client.getScheduler());
listeners.add(timeoutListener);
}
if (listener != null)
listeners.add(listener);
HttpConversation conversation = client.getConversation(request.getConversationID(), true);
HttpExchange exchange = new HttpExchange(conversation, getDestination(), request, listeners);
send(exchange);
}
public void send(HttpExchange exchange)
{
Request request = exchange.getRequest();
normalizeRequest(request);
// Save the old idle timeout to restore it
EndPoint endPoint = getEndPoint();
idleTimeout = endPoint.getIdleTimeout();
endPoint.setIdleTimeout(request.getIdleTimeout());
// Associate the exchange to the connection
associate(exchange);
sender.send(exchange);
}
private void normalizeRequest(Request request)
{
if (request.getMethod() == null)
request.method(HttpMethod.GET);
if (request.getVersion() == null)
request.version(HttpVersion.HTTP_1_1);
if (request.getIdleTimeout() <= 0)
request.idleTimeout(client.getIdleTimeout(), TimeUnit.MILLISECONDS);
HttpMethod method = request.getMethod();
HttpVersion version = request.getVersion();
HttpFields headers = request.getHeaders();
ContentProvider content = request.getContent();
if (request.getAgent() == null)
headers.put(client.getUserAgentField());
// Make sure the path is there
String path = request.getPath();
if (path.trim().length() == 0)
{
path = "/";
request.path(path);
}
if (destination.isProxied() && HttpMethod.CONNECT != request.getMethod())
{
path = request.getURI().toString();
request.path(path);
}
Fields fields = request.getParams();
if (!fields.isEmpty())
{
StringBuilder params = new StringBuilder();
for (Iterator fieldIterator = fields.iterator(); fieldIterator.hasNext();)
{
Fields.Field field = fieldIterator.next();
String[] values = field.values();
for (int i = 0; i < values.length; ++i)
{
if (i > 0)
params.append("&");
params.append(field.name()).append("=");
params.append(urlEncode(values[i]));
}
if (fieldIterator.hasNext())
params.append("&");
}
// Behave as a GET, adding the params to the path, if it's a POST with some content
if (method == HttpMethod.POST && request.getContent() != null)
method = HttpMethod.GET;
switch (method)
{
case GET:
{
path += "?";
path += params.toString();
request.path(path);
break;
}
case POST:
{
request.header(HttpHeader.CONTENT_TYPE.asString(), MimeTypes.Type.FORM_ENCODED.asString());
request.content(new StringContentProvider(params.toString()));
break;
}
}
}
// If we are HTTP 1.1, add the Host header
if (version.getVersion() > 10)
{
if (!headers.containsKey(HttpHeader.HOST.asString()))
headers.put(getDestination().getHostField());
}
// Add content headers
if (content != null)
{
long contentLength = content.getLength();
if (contentLength >= 0)
{
if (!headers.containsKey(HttpHeader.CONTENT_LENGTH.asString()))
headers.put(HttpHeader.CONTENT_LENGTH, String.valueOf(contentLength));
}
else
{
if (!headers.containsKey(HttpHeader.TRANSFER_ENCODING.asString()))
headers.put(CHUNKED_FIELD);
}
}
// Cookies
List cookies = client.getCookieStore().get(request.getURI());
StringBuilder cookieString = null;
for (int i = 0; i < cookies.size(); ++i)
{
if (cookieString == null)
cookieString = new StringBuilder();
if (i > 0)
cookieString.append("; ");
HttpCookie cookie = cookies.get(i);
cookieString.append(cookie.getName()).append("=").append(cookie.getValue());
}
if (cookieString != null)
request.header(HttpHeader.COOKIE.asString(), cookieString.toString());
// Authorization
Authentication.Result authnResult = client.getAuthenticationStore().findAuthenticationResult(request.getURI());
if (authnResult != null)
authnResult.apply(request);
if (!headers.containsKey(HttpHeader.ACCEPT_ENCODING.asString()))
{
HttpField acceptEncodingField = client.getAcceptEncodingField();
if (acceptEncodingField != null)
headers.put(acceptEncodingField);
}
}
private String urlEncode(String value)
{
String encoding = "UTF-8";
try
{
return URLEncoder.encode(value, encoding);
}
catch (UnsupportedEncodingException e)
{
throw new UnsupportedCharsetException(encoding);
}
}
public HttpExchange getExchange()
{
return exchange.get();
}
protected void associate(HttpExchange exchange)
{
if (!this.exchange.compareAndSet(null, exchange))
throw new UnsupportedOperationException("Pipelined requests not supported");
exchange.setConnection(this);
LOG.debug("{} associated to {}", exchange, this);
}
protected HttpExchange disassociate()
{
HttpExchange exchange = this.exchange.getAndSet(null);
if (exchange != null)
exchange.setConnection(null);
LOG.debug("{} disassociated from {}", exchange, this);
return exchange;
}
@Override
public void onFillable()
{
HttpExchange exchange = getExchange();
if (exchange != null)
{
receive();
}
else
{
// If there is no exchange, then could be either a remote close,
// or garbage bytes; in both cases we close the connection
close();
}
}
protected void receive()
{
receiver.receive();
}
public void complete(HttpExchange exchange, boolean success)
{
HttpExchange existing = disassociate();
if (existing == exchange)
{
exchange.awaitTermination();
// Restore idle timeout
getEndPoint().setIdleTimeout(idleTimeout);
LOG.debug("{} disassociated from {}", exchange, this);
if (success)
{
HttpFields responseHeaders = exchange.getResponse().getHeaders();
Enumeration values = responseHeaders.getValues(HttpHeader.CONNECTION.asString(), ",");
if (values != null)
{
while (values.hasMoreElements())
{
if ("close".equalsIgnoreCase(values.nextElement()))
{
close();
return;
}
}
}
destination.release(this);
}
else
{
close();
}
}
else if (existing == null)
{
// It is possible that the exchange has already been disassociated,
// for example if the connection idle timeouts: this will fail
// the response, but the request may still be under processing.
// Eventually the request will also fail as the connection is closed
// and will arrive here without an exchange being present.
// We just ignore this fact, as the exchange has already been processed
}
else
{
throw new IllegalStateException();
}
}
public boolean abort(Throwable cause)
{
// We want the return value to be that of the response
// because if the response has already successfully
// arrived then we failed to abort the exchange
sender.abort(cause);
return receiver.abort(cause);
}
public void proceed(boolean proceed)
{
sender.proceed(proceed);
}
@Override
public void close()
{
destination.remove(this);
getEndPoint().shutdownOutput();
LOG.debug("{} oshut", this);
getEndPoint().close();
LOG.debug("{} closed", this);
}
@Override
public String toString()
{
return String.format("%s@%x(l:%s <-> r:%s)",
HttpConnection.class.getSimpleName(),
hashCode(),
getEndPoint().getLocalAddress(),
getEndPoint().getRemoteAddress());
}
}
