org.eclipse.jetty.client.HttpExchange Maven / Gradle / Ivy
//
// ========================================================================
// Copyright (c) 1995-2016 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.IOException;
import java.io.InputStream;
import java.net.URI;
import java.util.concurrent.atomic.AtomicInteger;
import org.eclipse.jetty.client.security.SecurityListener;
import org.eclipse.jetty.http.HttpFields;
import org.eclipse.jetty.http.HttpHeaders;
import org.eclipse.jetty.http.HttpMethods;
import org.eclipse.jetty.http.HttpSchemes;
import org.eclipse.jetty.http.HttpURI;
import org.eclipse.jetty.http.HttpVersions;
import org.eclipse.jetty.io.Buffer;
import org.eclipse.jetty.io.BufferCache.CachedBuffer;
import org.eclipse.jetty.io.ByteArrayBuffer;
import org.eclipse.jetty.io.Connection;
import org.eclipse.jetty.io.EndPoint;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
import org.eclipse.jetty.util.thread.Timeout;
/**
*
* An HTTP client API that encapsulates an exchange (a request and its response) with a HTTP server.
*
*
* This object encapsulates:
*
* - The HTTP server address, see {@link #setAddress(Address)}, or {@link #setURI(URI)}, or {@link #setURL(String)})
*
- The HTTP request method, URI and HTTP version (see {@link #setMethod(String)}, {@link #setRequestURI(String)}, and {@link #setVersion(int)})
*
- The request headers (see {@link #addRequestHeader(String, String)} or {@link #setRequestHeader(String, String)})
*
- The request content (see {@link #setRequestContent(Buffer)} or {@link #setRequestContentSource(InputStream)})
*
- The status of the exchange (see {@link #getStatus()})
*
- Callbacks to handle state changes (see the onXxx methods such as {@link #onRequestComplete()} or {@link #onResponseComplete()})
*
- The ability to intercept callbacks (see {@link #setEventListener(HttpEventListener)}
*
*
*
* The HttpExchange class is intended to be used by a developer wishing to have close asynchronous interaction with the the exchange.
* Typically a developer will extend the HttpExchange class with a derived class that overrides some or all of the onXxx callbacks.
* There are also some predefined HttpExchange subtypes that can be used as a basis, see {@link org.eclipse.jetty.client.ContentExchange} and
* {@link org.eclipse.jetty.client.CachedExchange}.
*
*
*
* Typically the HttpExchange is passed to the {@link HttpClient#send(HttpExchange)} method, which in turn selects a {@link HttpDestination} and calls its
* {@link HttpDestination#send(HttpExchange)}, which then creates or selects a {@link AbstractHttpConnection} and calls its {@link AbstractHttpConnection#send(HttpExchange)}. A
* developer may wish to directly call send on the destination or connection if they wish to bypass some handling provided (eg Cookie handling in the
* HttpDestination).
*
*
*
* In some circumstances, the HttpClient or HttpDestination may wish to retry a HttpExchange (eg. failed pipeline request, authentication retry or redirection).
* In such cases, the HttpClient and/or HttpDestination may insert their own HttpExchangeListener to intercept and filter the call backs intended for the
* HttpExchange.
*
*/
public class HttpExchange
{
static final Logger LOG = Log.getLogger(HttpExchange.class);
public static final int STATUS_START = 0;
public static final int STATUS_WAITING_FOR_CONNECTION = 1;
public static final int STATUS_WAITING_FOR_COMMIT = 2;
public static final int STATUS_SENDING_REQUEST = 3;
public static final int STATUS_WAITING_FOR_RESPONSE = 4;
public static final int STATUS_PARSING_HEADERS = 5;
public static final int STATUS_PARSING_CONTENT = 6;
public static final int STATUS_COMPLETED = 7;
public static final int STATUS_EXPIRED = 8;
public static final int STATUS_EXCEPTED = 9;
public static final int STATUS_CANCELLING = 10;
public static final int STATUS_CANCELLED = 11;
public static final int STATUS_SENDING_PARSING_HEADERS = 12;
public static final int STATUS_SENDING_PARSING_CONTENT = 13;
public static final int STATUS_SENDING_COMPLETED = 14;
// HTTP protocol fields
private String _method = HttpMethods.GET;
private Buffer _scheme = HttpSchemes.HTTP_BUFFER;
private String _uri;
private int _version = HttpVersions.HTTP_1_1_ORDINAL;
private Address _address;
private final HttpFields _requestFields = new HttpFields();
private Buffer _requestContent;
private InputStream _requestContentSource;
private AtomicInteger _status = new AtomicInteger(STATUS_START);
private boolean _retryStatus = false;
// controls if the exchange will have listeners autoconfigured by the destination
private boolean _configureListeners = true;
private HttpEventListener _listener = new Listener();
private volatile AbstractHttpConnection _connection;
private Address _localAddress = null;
// a timeout for this exchange
private long _timeout = -1;
private volatile Timeout.Task _timeoutTask;
private long _lastStateChange=System.currentTimeMillis();
private long _sent=-1;
private int _lastState=-1;
private int _lastStatePeriod=-1;
boolean _onRequestCompleteDone;
boolean _onResponseCompleteDone;
boolean _onDone; // == onConnectionFail || onException || onExpired || onCancelled || onResponseCompleted && onRequestCompleted
protected void expire(HttpDestination destination)
{
AbstractHttpConnection connection = _connection;
int status = getStatus();
if (status < STATUS_COMPLETED ||
status == STATUS_SENDING_PARSING_HEADERS ||
status == STATUS_SENDING_PARSING_CONTENT ||
status == STATUS_SENDING_COMPLETED)
setStatus(STATUS_EXPIRED);
destination.exchangeExpired(this);
if (connection != null)
connection.exchangeExpired(this);
}
public int getStatus()
{
return _status.get();
}
/**
* @param status
* the status to wait for
* @throws InterruptedException
* if the waiting thread is interrupted
* @deprecated Use {@link #waitForDone()} instead
*/
@Deprecated
public void waitForStatus(int status) throws InterruptedException
{
throw new UnsupportedOperationException();
}
/**
* Wait until the exchange is "done". Done is defined as when a final state has been passed to the HttpExchange via the associated onXxx call. Note that an
* exchange can transit a final state when being used as part of a dialog (eg {@link SecurityListener}. Done status is thus defined as:
*
*
* done == onConnectionFailed || onException || onExpire || onRequestComplete && onResponseComplete
*
*
* @return the done status
* @throws InterruptedException
*/
public int waitForDone() throws InterruptedException
{
synchronized (this)
{
while (!isDone())
this.wait();
return _status.get();
}
}
public void reset()
{
// TODO - this should do a cancel and wakeup everybody that was waiting.
// might need a version number concept
synchronized (this)
{
_timeoutTask = null;
_onRequestCompleteDone = false;
_onResponseCompleteDone = false;
_onDone = false;
setStatus(STATUS_START);
}
}
/* ------------------------------------------------------------ */
/**
* @param newStatus
* @return True if the status was actually set.
*/
boolean setStatus(int newStatus)
{
boolean set = false;
try
{
int oldStatus = _status.get();
boolean ignored = false;
if (oldStatus != newStatus)
{
long now = System.currentTimeMillis();
_lastStatePeriod=(int)(now-_lastStateChange);
_lastState=oldStatus;
_lastStateChange=now;
if (newStatus==STATUS_SENDING_REQUEST)
_sent=_lastStateChange;
}
// State machine: from which old status you can go into which new status
switch (oldStatus)
{
case STATUS_START:
switch (newStatus)
{
case STATUS_START:
case STATUS_WAITING_FOR_CONNECTION:
case STATUS_WAITING_FOR_COMMIT:
case STATUS_CANCELLING:
case STATUS_EXCEPTED:
set = _status.compareAndSet(oldStatus,newStatus);
break;
case STATUS_EXPIRED:
set = setStatusExpired(newStatus,oldStatus);
break;
}
break;
case STATUS_WAITING_FOR_CONNECTION:
switch (newStatus)
{
case STATUS_WAITING_FOR_COMMIT:
case STATUS_CANCELLING:
case STATUS_EXCEPTED:
set = _status.compareAndSet(oldStatus,newStatus);
break;
case STATUS_EXPIRED:
set = setStatusExpired(newStatus,oldStatus);
break;
}
break;
case STATUS_WAITING_FOR_COMMIT:
switch (newStatus)
{
case STATUS_SENDING_REQUEST:
case STATUS_CANCELLING:
case STATUS_EXCEPTED:
set = _status.compareAndSet(oldStatus,newStatus);
break;
case STATUS_EXPIRED:
set = setStatusExpired(newStatus,oldStatus);
break;
}
break;
case STATUS_SENDING_REQUEST:
switch (newStatus)
{
case STATUS_PARSING_HEADERS:
set = _status.compareAndSet(oldStatus,STATUS_SENDING_PARSING_HEADERS);
break;
case STATUS_WAITING_FOR_RESPONSE:
if (set = _status.compareAndSet(oldStatus,newStatus))
getEventListener().onRequestCommitted();
break;
case STATUS_CANCELLING:
case STATUS_EXCEPTED:
set = _status.compareAndSet(oldStatus,newStatus);
break;
case STATUS_EXPIRED:
set = setStatusExpired(newStatus,oldStatus);
break;
}
break;
case STATUS_WAITING_FOR_RESPONSE:
switch (newStatus)
{
case STATUS_PARSING_HEADERS:
case STATUS_CANCELLING:
case STATUS_EXCEPTED:
set = _status.compareAndSet(oldStatus,newStatus);
break;
case STATUS_EXPIRED:
set = setStatusExpired(newStatus,oldStatus);
break;
}
break;
case STATUS_PARSING_HEADERS:
switch (newStatus)
{
case STATUS_PARSING_CONTENT:
if (set = _status.compareAndSet(oldStatus,newStatus))
getEventListener().onResponseHeaderComplete();
break;
case STATUS_CANCELLING:
case STATUS_EXCEPTED:
set = _status.compareAndSet(oldStatus,newStatus);
break;
case STATUS_EXPIRED:
set = setStatusExpired(newStatus,oldStatus);
break;
}
break;
case STATUS_PARSING_CONTENT:
switch (newStatus)
{
case STATUS_COMPLETED:
if (set = _status.compareAndSet(oldStatus,newStatus))
getEventListener().onResponseComplete();
break;
case STATUS_CANCELLING:
case STATUS_EXCEPTED:
set = _status.compareAndSet(oldStatus,newStatus);
break;
case STATUS_EXPIRED:
set = setStatusExpired(newStatus,oldStatus);
break;
}
break;
case STATUS_COMPLETED:
switch (newStatus)
{
case STATUS_START:
set = _status.compareAndSet(oldStatus,newStatus);
break;
case STATUS_WAITING_FOR_RESPONSE:
if (isResponseCompleted())
{
// Don't change the status, it's too late.
ignored = true;
getEventListener().onRequestCommitted();
}
else
{
// The 1xx cases go from COMPLETED => WAITING again.
set = _status.compareAndSet(oldStatus,newStatus);
}
break;
case STATUS_EXCEPTED:
case STATUS_CANCELLING:
case STATUS_EXPIRED:
// Don't change the status, it's too late
ignored = true;
break;
}
break;
case STATUS_CANCELLING:
switch (newStatus)
{
case STATUS_EXCEPTED:
case STATUS_CANCELLED:
if (set = _status.compareAndSet(oldStatus,newStatus))
done();
break;
default:
// Ignore other statuses, we're cancelling
ignored = true;
break;
}
break;
case STATUS_EXCEPTED:
case STATUS_EXPIRED:
case STATUS_CANCELLED:
switch (newStatus)
{
case STATUS_START:
set = _status.compareAndSet(oldStatus,newStatus);
break;
case STATUS_COMPLETED:
ignored = true;
done();
break;
default:
ignored = true;
break;
}
break;
case STATUS_SENDING_PARSING_HEADERS:
switch (newStatus)
{
case STATUS_WAITING_FOR_RESPONSE:
if (set = _status.compareAndSet(oldStatus,STATUS_PARSING_HEADERS))
getEventListener().onRequestCommitted();
break;
case STATUS_PARSING_CONTENT:
if (set = _status.compareAndSet(oldStatus,STATUS_SENDING_PARSING_CONTENT))
getEventListener().onResponseHeaderComplete();
break;
case STATUS_CANCELLING:
case STATUS_EXCEPTED:
set = _status.compareAndSet(oldStatus,newStatus);
break;
case STATUS_EXPIRED:
set = setStatusExpired(newStatus,oldStatus);
break;
default:
break;
}
break;
case STATUS_SENDING_PARSING_CONTENT:
switch (newStatus)
{
case STATUS_WAITING_FOR_RESPONSE:
if (set = _status.compareAndSet(oldStatus,STATUS_PARSING_CONTENT))
getEventListener().onRequestCommitted();
break;
case STATUS_COMPLETED:
if (set = _status.compareAndSet(oldStatus,STATUS_SENDING_COMPLETED))
getEventListener().onResponseComplete();
break;
case STATUS_CANCELLING:
case STATUS_EXCEPTED:
set = _status.compareAndSet(oldStatus,newStatus);
break;
case STATUS_EXPIRED:
set = setStatusExpired(newStatus,oldStatus);
break;
default:
break;
}
break;
case STATUS_SENDING_COMPLETED:
switch (newStatus)
{
case STATUS_WAITING_FOR_RESPONSE:
if (set = _status.compareAndSet(oldStatus,STATUS_COMPLETED))
getEventListener().onRequestCommitted();
break;
case STATUS_CANCELLING:
case STATUS_EXCEPTED:
set = _status.compareAndSet(oldStatus,newStatus);
break;
case STATUS_EXPIRED:
set = setStatusExpired(newStatus,oldStatus);
break;
default:
break;
}
break;
default:
// Here means I allowed to set a state that I don't recognize
throw new AssertionError(oldStatus + " => " + newStatus);
}
if (!set && !ignored)
throw new IllegalStateException(toState(oldStatus) + " => " + toState(newStatus));
LOG.debug("setStatus {} {}",newStatus,this);
}
catch (IOException x)
{
LOG.warn(x);
}
return set;
}
private boolean isResponseCompleted()
{
synchronized (this)
{
return _onResponseCompleteDone;
}
}
private boolean setStatusExpired(int newStatus, int oldStatus)
{
boolean set;
if (set = _status.compareAndSet(oldStatus,newStatus))
getEventListener().onExpire();
return set;
}
public boolean isDone()
{
synchronized (this)
{
return _onDone;
}
}
/**
* @deprecated
*/
@Deprecated
public boolean isDone(int status)
{
return isDone();
}
public HttpEventListener getEventListener()
{
return _listener;
}
public void setEventListener(HttpEventListener listener)
{
_listener = listener;
}
public void setTimeout(long timeout)
{
_timeout = timeout;
}
public long getTimeout()
{
return _timeout;
}
/**
* @param url
* an absolute URL (for example 'http://localhost/foo/bar?a=1')
*/
public void setURL(String url)
{
setURI(URI.create(url));
}
/**
* @param address
* the address of the server
*/
public void setAddress(Address address)
{
_address = address;
}
/**
* @return the address of the server
*/
public Address getAddress()
{
return _address;
}
/**
* the local address used by the connection
*
* Note: this method will not be populated unless the exchange has been executed by the HttpClient
*
* @return the local address used for the running of the exchange if available, null otherwise.
*/
public Address getLocalAddress()
{
return _localAddress;
}
/**
* @param scheme
* the scheme of the URL (for example 'http')
*/
public void setScheme(Buffer scheme)
{
_scheme = scheme;
}
/**
* @param scheme
* the scheme of the URL (for example 'http')
*/
public void setScheme(String scheme)
{
if (scheme != null)
{
if (HttpSchemes.HTTP.equalsIgnoreCase(scheme))
setScheme(HttpSchemes.HTTP_BUFFER);
else if (HttpSchemes.HTTPS.equalsIgnoreCase(scheme))
setScheme(HttpSchemes.HTTPS_BUFFER);
else
setScheme(new ByteArrayBuffer(scheme));
}
}
/**
* @return the scheme of the URL
*/
public Buffer getScheme()
{
return _scheme;
}
/**
* @param version
* the HTTP protocol version as integer, 9, 10 or 11 for 0.9, 1.0 or 1.1
*/
public void setVersion(int version)
{
_version = version;
}
/**
* @param version
* the HTTP protocol version as string
*/
public void setVersion(String version)
{
CachedBuffer v = HttpVersions.CACHE.get(version);
if (v == null)
_version = 10;
else
_version = v.getOrdinal();
}
/**
* @return the HTTP protocol version as integer
* @see #setVersion(int)
*/
public int getVersion()
{
return _version;
}
/**
* @param method
* the HTTP method (for example 'GET')
*/
public void setMethod(String method)
{
_method = method;
}
/**
* @return the HTTP method
*/
public String getMethod()
{
return _method;
}
/**
* @return request URI
* @see #getRequestURI()
* @deprecated
*/
@Deprecated
public String getURI()
{
return getRequestURI();
}
/**
* @return request URI
*/
public String getRequestURI()
{
return _uri;
}
/**
* Set the request URI
*
* @param uri
* new request URI
* @see #setRequestURI(String)
* @deprecated
*/
@Deprecated
public void setURI(String uri)
{
setRequestURI(uri);
}
/**
* Set the request URI
*
* Per RFC 2616 sec5, Request-URI = "*" | absoluteURI | abs_path | authority
* where:
*
* "*" - request applies to server itself
* absoluteURI - required for proxy requests, e.g. http://localhost:8080/context
* (this form is generated automatically by HttpClient)
* abs_path - used for most methods, e.g. /context
* authority - used for CONNECT method only, e.g. localhost:8080
*
* For complete definition of URI components, see RFC 2396 sec3.
*
* @param uri
* new request URI
*/
public void setRequestURI(String uri)
{
_uri = uri;
}
/* ------------------------------------------------------------ */
/**
* @param uri
* an absolute URI (for example 'http://localhost/foo/bar?a=1')
*/
public void setURI(URI uri)
{
if (!uri.isAbsolute())
throw new IllegalArgumentException("!Absolute URI: " + uri);
if (uri.isOpaque())
throw new IllegalArgumentException("Opaque URI: " + uri);
if (LOG.isDebugEnabled())
LOG.debug("URI = {}",uri.toASCIIString());
String scheme = uri.getScheme();
int port = uri.getPort();
if (port <= 0)
port = "https".equalsIgnoreCase(scheme)?443:80;
setScheme(scheme);
setAddress(new Address(uri.getHost(),port));
HttpURI httpUri = new HttpURI(uri);
String completePath = httpUri.getCompletePath();
setRequestURI(completePath == null?"/":completePath);
}
/**
* Adds the specified request header
*
* @param name
* the header name
* @param value
* the header value
*/
public void addRequestHeader(String name, String value)
{
getRequestFields().add(name,value);
}
/**
* Adds the specified request header
*
* @param name
* the header name
* @param value
* the header value
*/
public void addRequestHeader(Buffer name, Buffer value)
{
getRequestFields().add(name,value);
}
/**
* Sets the specified request header
*
* @param name
* the header name
* @param value
* the header value
*/
public void setRequestHeader(String name, String value)
{
getRequestFields().put(name,value);
}
/**
* Sets the specified request header
*
* @param name
* the header name
* @param value
* the header value
*/
public void setRequestHeader(Buffer name, Buffer value)
{
getRequestFields().put(name,value);
}
/**
* @param value
* the content type of the request
*/
public void setRequestContentType(String value)
{
getRequestFields().put(HttpHeaders.CONTENT_TYPE_BUFFER,value);
}
/**
* @return the request headers
*/
public HttpFields getRequestFields()
{
return _requestFields;
}
/**
* @param requestContent
* the request content
*/
public void setRequestContent(Buffer requestContent)
{
_requestContent = requestContent;
}
/**
* @param stream
* the request content as a stream
*/
public void setRequestContentSource(InputStream stream)
{
_requestContentSource = stream;
if (_requestContentSource != null && _requestContentSource.markSupported())
_requestContentSource.mark(Integer.MAX_VALUE);
}
/**
* @return the request content as a stream
*/
public InputStream getRequestContentSource()
{
return _requestContentSource;
}
public Buffer getRequestContentChunk(Buffer buffer) throws IOException
{
synchronized (this)
{
if (_requestContentSource!=null)
{
if (buffer == null)
buffer = new ByteArrayBuffer(8192); // TODO configure
int space = buffer.space();
int length = _requestContentSource.read(buffer.array(),buffer.putIndex(),space);
if (length >= 0)
{
buffer.setPutIndex(buffer.putIndex()+length);
return buffer;
}
}
return null;
}
}
/**
* @return the request content
*/
public Buffer getRequestContent()
{
return _requestContent;
}
/**
* @return whether a retry will be attempted or not
*/
public boolean getRetryStatus()
{
return _retryStatus;
}
/**
* @param retryStatus
* whether a retry will be attempted or not
*/
public void setRetryStatus(boolean retryStatus)
{
_retryStatus = retryStatus;
}
/**
* Initiates the cancelling of this exchange. The status of the exchange is set to {@link #STATUS_CANCELLING}. Cancelling the exchange is an asynchronous
* operation with respect to the request/response, and as such checking the request/response status of a cancelled exchange may return undefined results
* (for example it may have only some of the response headers being sent by the server). The cancelling of the exchange is completed when the exchange
* status (see {@link #getStatus()}) is {@link #STATUS_CANCELLED}, and this can be waited using {@link #waitForDone()}.
*/
public void cancel()
{
setStatus(STATUS_CANCELLING);
abort();
}
private void done()
{
synchronized (this)
{
disassociate();
_onDone = true;
notifyAll();
}
}
private void abort()
{
AbstractHttpConnection httpConnection = _connection;
if (httpConnection != null)
{
try
{
// Closing the connection here will cause the connection
// to be returned in HttpConnection.handle()
httpConnection.close();
}
catch (IOException x)
{
LOG.debug(x);
}
finally
{
disassociate();
}
}
}
void associate(AbstractHttpConnection connection)
{
if (connection.getEndPoint().getLocalAddr() != null)
_localAddress = new Address(connection.getEndPoint().getLocalAddr(),connection.getEndPoint().getLocalPort());
_connection = connection;
if (getStatus() == STATUS_CANCELLING)
abort();
}
boolean isAssociated()
{
return this._connection != null;
}
AbstractHttpConnection disassociate()
{
AbstractHttpConnection result = _connection;
this._connection = null;
if (getStatus() == STATUS_CANCELLING)
setStatus(STATUS_CANCELLED);
return result;
}
public static String toState(int s)
{
String state;
switch (s)
{
case STATUS_START:
state = "START";
break;
case STATUS_WAITING_FOR_CONNECTION:
state = "CONNECTING";
break;
case STATUS_WAITING_FOR_COMMIT:
state = "CONNECTED";
break;
case STATUS_SENDING_REQUEST:
state = "SENDING";
break;
case STATUS_WAITING_FOR_RESPONSE:
state = "WAITING";
break;
case STATUS_PARSING_HEADERS:
state = "HEADERS";
break;
case STATUS_PARSING_CONTENT:
state = "CONTENT";
break;
case STATUS_COMPLETED:
state = "COMPLETED";
break;
case STATUS_EXPIRED:
state = "EXPIRED";
break;
case STATUS_EXCEPTED:
state = "EXCEPTED";
break;
case STATUS_CANCELLING:
state = "CANCELLING";
break;
case STATUS_CANCELLED:
state = "CANCELLED";
break;
case STATUS_SENDING_PARSING_HEADERS:
state = "SENDING+HEADERS";
break;
case STATUS_SENDING_PARSING_CONTENT:
state = "SENDING+CONTENT";
break;
case STATUS_SENDING_COMPLETED:
state = "SENDING+COMPLETED";
break;
default:
state = "UNKNOWN";
}
return state;
}
@Override
public String toString()
{
String state=toState(getStatus());
long now=System.currentTimeMillis();
long forMs = now -_lastStateChange;
String s= _lastState>=0
?String.format("%s@%x=%s//%s%s#%s(%dms)->%s(%dms)",getClass().getSimpleName(),hashCode(),_method,_address,_uri,toState(_lastState),_lastStatePeriod,state,forMs)
:String.format("%s@%x=%s//%s%s#%s(%dms)",getClass().getSimpleName(),hashCode(),_method,_address,_uri,state,forMs);
if (getStatus()>=STATUS_SENDING_REQUEST && _sent>0)
s+="sent="+(now-_sent)+"ms";
return s;
}
/**
*/
protected Connection onSwitchProtocol(EndPoint endp) throws IOException
{
return null;
}
/**
* Callback called when the request headers have been sent to the server. This implementation does nothing.
*
* @throws IOException
* allowed to be thrown by overriding code
*/
protected void onRequestCommitted() throws IOException
{
}
/**
* Callback called when the request and its body have been sent to the server. This implementation does nothing.
*
* @throws IOException
* allowed to be thrown by overriding code
*/
protected void onRequestComplete() throws IOException
{
}
/**
* Callback called when a response status line has been received from the server. This implementation does nothing.
*
* @param version
* the HTTP version
* @param status
* the HTTP status code
* @param reason
* the HTTP status reason string
* @throws IOException
* allowed to be thrown by overriding code
*/
protected void onResponseStatus(Buffer version, int status, Buffer reason) throws IOException
{
}
/**
* Callback called for each response header received from the server. This implementation does nothing.
*
* @param name
* the header name
* @param value
* the header value
* @throws IOException
* allowed to be thrown by overriding code
*/
protected void onResponseHeader(Buffer name, Buffer value) throws IOException
{
}
/**
* Callback called when the response headers have been completely received from the server. This implementation does nothing.
*
* @throws IOException
* allowed to be thrown by overriding code
*/
protected void onResponseHeaderComplete() throws IOException
{
}
/**
* Callback called for each chunk of the response content received from the server. This implementation does nothing.
*
* @param content
* the buffer holding the content chunk
* @throws IOException
* allowed to be thrown by overriding code
*/
protected void onResponseContent(Buffer content) throws IOException
{
}
/**
* Callback called when the entire response has been received from the server This implementation does nothing.
*
* @throws IOException
* allowed to be thrown by overriding code
*/
protected void onResponseComplete() throws IOException
{
}
/**
* Callback called when an exception was thrown during an attempt to establish the connection with the server (for example the server is not listening).
* This implementation logs a warning.
*
* @param x
* the exception thrown attempting to establish the connection with the server
*/
protected void onConnectionFailed(Throwable x)
{
LOG.warn("CONNECTION FAILED " + this,x);
}
/**
* Callback called when any other exception occurs during the handling of this exchange. This implementation logs a warning.
*
* @param x
* the exception thrown during the handling of this exchange
*/
protected void onException(Throwable x)
{
LOG.warn("EXCEPTION " + this,x);
}
/**
* Callback called when no response has been received within the timeout. This implementation logs a warning.
*/
protected void onExpire()
{
LOG.warn("EXPIRED " + this);
}
/**
* Callback called when the request is retried (due to failures or authentication). Implementations must reset any consumable content that needs to be sent.
*
* @throws IOException
* allowed to be thrown by overriding code
*/
protected void onRetry() throws IOException
{
if (_requestContentSource != null)
{
if (_requestContentSource.markSupported())
{
_requestContent = null;
_requestContentSource.reset();
}
else
{
throw new IOException("Unsupported retry attempt");
}
}
}
/**
* @return true if the exchange should have listeners configured for it by the destination, false if this is being managed elsewhere
* @see #setConfigureListeners(boolean)
*/
public boolean configureListeners()
{
return _configureListeners;
}
/**
* @param autoConfigure
* whether the listeners are configured by the destination or elsewhere
*/
public void setConfigureListeners(boolean autoConfigure)
{
this._configureListeners = autoConfigure;
}
protected void scheduleTimeout(final HttpDestination destination)
{
assert _timeoutTask == null;
_timeoutTask = new Timeout.Task()
{
@Override
public void expired()
{
HttpExchange.this.expire(destination);
}
};
HttpClient httpClient = destination.getHttpClient();
long timeout = getTimeout();
if (timeout > 0)
httpClient.schedule(_timeoutTask,timeout);
else
httpClient.schedule(_timeoutTask);
}
protected void cancelTimeout(HttpClient httpClient)
{
Timeout.Task task = _timeoutTask;
if (task != null)
httpClient.cancel(task);
_timeoutTask = null;
}
private class Listener implements HttpEventListener
{
public void onConnectionFailed(Throwable ex)
{
try
{
HttpExchange.this.onConnectionFailed(ex);
}
finally
{
done();
}
}
public void onException(Throwable ex)
{
try
{
HttpExchange.this.onException(ex);
}
finally
{
done();
}
}
public void onExpire()
{
try
{
HttpExchange.this.onExpire();
}
finally
{
done();
}
}
public void onRequestCommitted() throws IOException
{
HttpExchange.this.onRequestCommitted();
}
public void onRequestComplete() throws IOException
{
try
{
HttpExchange.this.onRequestComplete();
}
finally
{
synchronized (HttpExchange.this)
{
_onRequestCompleteDone = true;
// Member _onDone may already be true, for example
// because the exchange expired or has been canceled
_onDone |= _onResponseCompleteDone;
if (_onDone)
disassociate();
HttpExchange.this.notifyAll();
}
}
}
public void onResponseComplete() throws IOException
{
try
{
HttpExchange.this.onResponseComplete();
}
finally
{
synchronized (HttpExchange.this)
{
_onResponseCompleteDone = true;
// Member _onDone may already be true, for example
// because the exchange expired or has been canceled
_onDone |= _onRequestCompleteDone;
if (_onDone)
disassociate();
HttpExchange.this.notifyAll();
}
}
}
public void onResponseContent(Buffer content) throws IOException
{
HttpExchange.this.onResponseContent(content);
}
public void onResponseHeader(Buffer name, Buffer value) throws IOException
{
HttpExchange.this.onResponseHeader(name,value);
}
public void onResponseHeaderComplete() throws IOException
{
HttpExchange.this.onResponseHeaderComplete();
}
public void onResponseStatus(Buffer version, int status, Buffer reason) throws IOException
{
HttpExchange.this.onResponseStatus(version,status,reason);
}
public void onRetry()
{
HttpExchange.this.setRetryStatus(true);
try
{
HttpExchange.this.onRetry();
}
catch (IOException e)
{
LOG.debug(e);
}
}
}
/**
* @deprecated use {@link org.eclipse.jetty.client.CachedExchange} instead
*/
@Deprecated
public static class CachedExchange extends org.eclipse.jetty.client.CachedExchange
{
public CachedExchange(boolean cacheFields)
{
super(cacheFields);
}
}
/**
* @deprecated use {@link org.eclipse.jetty.client.ContentExchange} instead
*/
@Deprecated
public static class ContentExchange extends org.eclipse.jetty.client.ContentExchange
{
}
}
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